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Konmy B, Bossikponsi MG, Dansou CC, Arigbo KB, Houmenou GT, Adoho CA, Azando EVB, Doko Allou SY, Olounladé PA. Evaluation of the effect of Carica papaya seed on the growth performance of fattening rabbits. Trop Anim Health Prod 2024; 56:134. [PMID: 38642256 DOI: 10.1007/s11250-024-03969-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 03/22/2024] [Indexed: 04/22/2024]
Abstract
Successful breeding depends on feeding. The present study aims to evaluate the Carica papaya seed effect on the growth performance of rabbits. The zootechnical parameters studied are weight growth, average daily gain, Feed Conversion Ratio, and carcass characteristics of kits. The experiment was conducted on 48 rabbits, divided into 4 groups, for 6 weeks. Forty-eight rabbits were divided into four (04) groups of 3 repetitions of 4 rabbits. The animals were fed diets containing various levels of papaya seed powder at variable contents: 0% (group T0), 4% (group T1), 6% (group T2), and 8% (group T3). At the end of the experiment, three animals were slaughtered in each animal group to assess the quality of the carcasses and organs. 6% of the seeds of Carica papaya significantly improved (p < 0.05) the average daily gain of the kits: T2 (22.40 g / d) compared to the T0 group (11.32 g / d), T1 (12.20 g / d) and T3 (17.53 g / d). The best Feed Conversion Ratio (0.80) was recorded in the animals of group T2. In contrast, the highest carcass yield was recorded in the rabbits of group T3 (62.70%). In conclusion, 6% was optimal in the feed rations of fattened rabbits to improve production performance. Breeders can consider the benefits of introducing Carica papaya seeds into the rabbits' diet.
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Affiliation(s)
- Basile Konmy
- Zootechnical Research and Livestock System Unit, Laboratory of Animal and Fisheries Science (LaSAH), National University of Agriculture, 01 BP: 55, Porto-Novo, Benin
| | - Mariano G Bossikponsi
- Zootechnical Research and Livestock System Unit, Laboratory of Animal and Fisheries Science (LaSAH), National University of Agriculture, 01 BP: 55, Porto-Novo, Benin
| | - Christian C Dansou
- Zootechnical Research and Livestock System Unit, Laboratory of Animal and Fisheries Science (LaSAH), National University of Agriculture, 01 BP: 55, Porto-Novo, Benin
| | - Kisito B Arigbo
- Zootechnical Research and Livestock System Unit, Laboratory of Animal and Fisheries Science (LaSAH), National University of Agriculture, 01 BP: 55, Porto-Novo, Benin
| | - Geraldo T Houmenou
- Zootechnical Research and Livestock System Unit, Laboratory of Animal and Fisheries Science (LaSAH), National University of Agriculture, 01 BP: 55, Porto-Novo, Benin
- Laboratory of Ecology, Health, and Animal Production, Department of Animal and Fisheries Production Sciences and Techniques, Faculty of Agronomy, University of Parakou, Parakou, Benin
| | - Carine A Adoho
- Zootechnical Research and Livestock System Unit, Laboratory of Animal and Fisheries Science (LaSAH), National University of Agriculture, 01 BP: 55, Porto-Novo, Benin
| | - Erick V B Azando
- Laboratory of Ecology, Health, and Animal Production, Department of Animal and Fisheries Production Sciences and Techniques, Faculty of Agronomy, University of Parakou, Parakou, Benin
| | - Sanni-Yo Doko Allou
- Zootechnical Research and Livestock System Unit, Laboratory of Animal and Fisheries Science (LaSAH), National University of Agriculture, 01 BP: 55, Porto-Novo, Benin
| | - Pascal A Olounladé
- Zootechnical Research and Livestock System Unit, Laboratory of Animal and Fisheries Science (LaSAH), National University of Agriculture, 01 BP: 55, Porto-Novo, Benin.
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2
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Piles M, Mora M, Kyriazakis I, Tusell L, Pascual M, Sánchez JP. Novel phenotypes of feeding and social behaviour and their relationship with individual rabbit growth and feed efficiency. Animal 2024; 18:101090. [PMID: 38377814 DOI: 10.1016/j.animal.2024.101090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 01/16/2024] [Accepted: 01/22/2024] [Indexed: 02/22/2024] Open
Abstract
Due to the lack of a recording system for individual consumption of group-housed rabbits, published studies about feeding behaviour are based on information recorded at the group- and not at the individual level and periods covering only a few days or, in some cases, only part of a day. Such information could be used to inform rabbit management systems but cannot be used for genetic selection. We aimed to generate and use information from a novel automated feeder for group-housed rabbits to identify new phenotypes for individual animals that could be incorporated into breeding programs to improve feed efficiency and social behaviour under different feeding regimens. At 39 d of age, rabbits from 15 batches were placed in cages and fed ad libitum to become used to the electronic feeder. From 42 to 58-59 d, one group of 1 086 rabbits was fed ad libitum (AL), while another group of 1 134 rabbits was fed on a restricted feeding schedule (R) by limiting the feeding time to the period between 1800 and 0600 h of the following day. We implemented a reliable multivariate method to remove anomalous feeding behaviour records. We then defined novel traits for feeding behaviour that apply to both types of feeding regimes, and for social behaviour that indicates an animal's rank within the cage hierarchy. We based these traits on feeder records and a biologically sound definition of a meal. Finally, we estimated the phenotypic correlations of those traits with growth and feed efficiency traits. Our findings demonstrate that variables about resource distribution among cage mates and an animal's priority for feed access were found to be good indicators of an animal's dominant or subordinate status within the cage. Based on results obtained in R animals (results were similar in AL animals), the most efficient animals were those that ate less frequently (phenotypic correlation with feed conversion ratio, rho = 0.6), and consumed smaller amounts per meal (rho = 0.7), spent less time at the feeder (rho = 0.4), and appeared to be subordinate, as they did not have priority access to the feeder (rho = -0.3), and had the smallest share of resources (range of rho = 0.2-0.6). We conclude that quantifying feeding and social behaviour traits can enhance the understanding of the mechanisms through which individuals exert their effects on the performance of their cage mates.
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Affiliation(s)
- M Piles
- Animal Breeding and Genetics, Institute of Agrifood Research and Technology (IRTA), Caldes de Montbui, 08140 Barcelona, Spain.
| | - M Mora
- Animal Breeding and Genetics, Institute of Agrifood Research and Technology (IRTA), Caldes de Montbui, 08140 Barcelona, Spain
| | - I Kyriazakis
- Institute for Global Food Security, Queen's University Belfast, Biological Sciences, 19 Chlorine Gardens, BT9 5DL, UK
| | - L Tusell
- Animal Breeding and Genetics, Institute of Agrifood Research and Technology (IRTA), Caldes de Montbui, 08140 Barcelona, Spain
| | - M Pascual
- Animal Breeding and Genetics, Institute of Agrifood Research and Technology (IRTA), Caldes de Montbui, 08140 Barcelona, Spain
| | - J P Sánchez
- Animal Breeding and Genetics, Institute of Agrifood Research and Technology (IRTA), Caldes de Montbui, 08140 Barcelona, Spain
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3
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van der Sluis M, van Zeeland YRA, de Greef KH. Digestive problems in rabbit production: moving in the wrong direction? Front Vet Sci 2024; 11:1354651. [PMID: 38384954 PMCID: PMC10879550 DOI: 10.3389/fvets.2024.1354651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Accepted: 01/22/2024] [Indexed: 02/23/2024] Open
Abstract
Digestive problems, both those with a clear pathogenic origin (e.g., Escherichia coli) and those without obvious pathogen involvement [e.g., syndromes like epizootic rabbit enteropathy (ERE)], are common in production rabbits and account for the majority of losses in meat rabbit production. A multitude of nutritional, genetic and housing factors have been found to play a role in the occurrence of digestive problems. However, the exact early pathophysiological mechanism, including the links between aforementioned risk factors and subsequent development and expression of gastrointestinal disease, is less clear, especially in non-specific enteropathies without obvious pathogen involvement. In this review, we aim to shed more light on the derailment of the normal gastrointestinal functioning in rabbits. We discuss a conceptual integrated view of this derailment, based on an "overload" pathway and a "chymus jam" pathway, which may occur simultaneously and interact. The "overload" pathway centers around exposure to excess amounts of easily fermentable substrate (e.g., starch and protein) that might be incompletely digested prior to entering the caecum. Once there, hyperfermentation may result in changes in caecal pH and inhibition of the normal microflora. The second pathway centers around a chymus jam resulting from a compromised passage rate. Here, reduced hindgut motility (e.g., resulting from stress or limited fiber supply) leads to reduced flow of digesta and increased caecal retention times, which might lead to the production of abnormal caecal fermentation products and subsequent inhibition of the normal microflora. A central role in the presumed mechanism is attributed to the fusus coli. We discuss the suggested mechanisms behind both pathways, as well as the empirical substantiation and alignment between theoretical concepts and observations in practice. The proposed hypotheses may explain the effect of time-based restriction to prevent ERE, which is widely applied in practice but to date not really understood, and suggest that the particle size of fiber may be a key point in the normal functioning of the colon and fusus coli. Further insight into the circumstances leading to the derailment of physiological processes in the rabbit hindgut could provide a meaningful starting point to help improve their gastrointestinal resilience.
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Affiliation(s)
- Malou van der Sluis
- Wageningen Livestock Research, Wageningen University & Research, Wageningen, Netherlands
| | - Yvonne R. A. van Zeeland
- Division of Zoological Medicine, Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| | - Karel H. de Greef
- Wageningen Livestock Research, Wageningen University & Research, Wageningen, Netherlands
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Ebeid TA, Al-Homidan IH, Saleh AA, Barakat HA. Physiological and immunological aspects of feed restriction and its beneficial impacts in fattening rabbits' productivity-an updated review. Trop Anim Health Prod 2024; 56:33. [PMID: 38183493 DOI: 10.1007/s11250-023-03881-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 12/22/2023] [Indexed: 01/08/2024]
Abstract
Two feed restriction (FR) regimens are utilized with weaned rabbits including a quantitative FR (amount-limited feed or time-restricted admission to feed) and a qualitative FR (modulation of diet content especially protein and energy). The use of post-weaning FR may help in preventing post-weaning digestive disorders, stimulating compensating growth, improving feed efficiency, and decreasing carcass fat content. Interestingly, FR may contribute to changing meat's chemical composition and its physical quality attributes by regulating the morphological and biochemical characteristics of muscle fibers. Also, FR could enhance the gastrointestinal tract development, its histomorphology, and improve feed digestibility and absorption. Furthermore, FR regimens are involved in establishing gut microbial balance and enhancing the host immunological response. It might be concluded that post-weaning FR is involved in influencing the physiological and immunological aspects of growing rabbits. It might be documented that light to mild FR (i.e., 80-90% AL), early (i.e., at the first 2 weeks post-weaning), and relatively short in duration (i.e., for 2-3 weeks) had no negative effects on live body weight, while severing FR reduced live body weight in comparison with ad libitum rabbits.
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Affiliation(s)
- Tarek Amin Ebeid
- Department of Animal Production and Breeding, College of Agriculture and Veterinary Medicine, Qassim University, 51452, Buraydah, Saudi Arabia.
- Department of Poultry Production, Faculty of Agriculture, Kafrelsheikh University, Kafr El-Sheikh, 33516, Egypt.
| | - Ibrahim Hamad Al-Homidan
- Department of Animal Production and Breeding, College of Agriculture and Veterinary Medicine, Qassim University, 51452, Buraydah, Saudi Arabia
| | - Ahmed Ali Saleh
- Department of Poultry Production, Faculty of Agriculture, Kafrelsheikh University, Kafr El-Sheikh, 33516, Egypt
| | - Hassan Ahmed Barakat
- Department of Food Science and Human Nutrition, College of Agriculture and Veterinary Medicine, Qassim University, 51452, Buraydah, Saudi Arabia
- Food Technology Department, Faculty of Agriculture, Benha University, Moshtohor, 13736, Egypt
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5
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Li Y, Zhou T, Zhuang J, Dai Y, Zhang X, Bai S, Zhao B, Tang X, Wu X, Chen Y. Effects of feeding restriction on skeletal muscle development and functional analysis of TNNI1 in New Zealand white rabbits. Anim Biotechnol 2023; 34:4435-4447. [PMID: 36520026 DOI: 10.1080/10495398.2022.2155662] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
While restricting nutrition can improve diseases related to the digestive tract, excessive restriction of food intake can also lead to malnutrition and delayed physical growth. Therefore, this brings the demand to study the effect and potential mechanism of restricted feeding on skeletal muscle development in rabbits. This study utilized hematoxylin-eosin (HE) staining to detect muscle fiber area which depicted significant reduction in skeletal muscle fiber upon 30% feed restriction (p < 0.05). The control group and 30% feed restricted group showed 615 deferentially expressed genes (DEGs). Through the GO and KEGG functional enrichment analysis demonstrated 28 DEGs related to muscle development. KEGG analysis showed enrichment of pathways including PI3K/Akt signaling pathway, MAPK signaling pathway, and Hedgehog signaling pathway. Further, the full length of troponin I1, slow skeletal type (TNNI1) was cloned. We studied the expression of skeletal muscle differentiation-related genes such as MyoD, Myf5 gene and Desmin. Specifically, the TNNI1 gene overexpression and knockdown studies were conducted. The over-expression of TNNI1 significantly enhanced the expression of the skeletal muscle development-related genes. Contrastingly, the silencing of TNNI1 gene reduced the expression significantly. These findings showed that TNNI1 may be a regulator for regulating the expression of muscle development-related genes.
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Affiliation(s)
- Yunpeng Li
- College of Animal Science and Technology, Yangzhou University, Jiangsu, China
| | - Tong Zhou
- College of Animal Science and Technology, Yangzhou University, Jiangsu, China
| | - Junyi Zhuang
- College of Animal Science and Technology, Yangzhou University, Jiangsu, China
| | - Yingying Dai
- College of Animal Science and Technology, Yangzhou University, Jiangsu, China
| | - Xiyu Zhang
- College of Animal Science and Technology, Yangzhou University, Jiangsu, China
| | - Shaocheng Bai
- College of Animal Science and Technology, Yangzhou University, Jiangsu, China
| | - Bohao Zhao
- College of Animal Science and Technology, Yangzhou University, Jiangsu, China
| | - Xianwei Tang
- Jiangsu Pizhou Orient Breeding Co., Ltd, Jiangsu, China
| | - Xinsheng Wu
- College of Animal Science and Technology, Yangzhou University, Jiangsu, China
| | - Yang Chen
- College of Animal Science and Technology, Yangzhou University, Jiangsu, China
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6
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Peris SIE, Abd El-Latif KM. Effect of feed restriction on growth performance, carcass traits, and some hematological and blood biochemical parameters in growing rabbits. Anim Biotechnol 2023; 34:67-76. [PMID: 34138689 DOI: 10.1080/10495398.2021.1935983] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Sixty-four male New Zealand White rabbits, 4 weeks old, were used to study the effects of feed restriction (FR) on growth performance, carcass traits, and some blood parameters. Rabbits were randomly allotted to 4 equal groups. The first group was fed ad libitum (control group). The second, third, and fourth groups were restricted from 4 to 8 (R4-8), 8 to 12 (R8-12), and 4 to 12 (R4-12) weeks of age, respectively. Restricted groups were fed 85% of the control. Means of live body weights (LBW), average daily gain weights (ADGW), relative growth rate (RGR) were calculated. Carcass traits and blood parameters were measured. Results showed that, FR reduced LBW, ADGW and RGR in R4-8 and R4-12 groups. However, FR did not impair the previous traits in R8-12 group. Carcass weight was not impaired in R8-12 group. However, FR reduced kidney fat in all restricted groups. Feed restriction reduced hemoglobin, red blood cell (RBC) and platelet levels in R4-8 and/or R4-12 groups. However, RBC and platelet levels were not altered in R8-12 group. Conclusively, FR impaired growth performance, carcass weight and blood parameters in R4-8 and R4-12 groups, however, the previous traits were not impaired in R8-12 group.
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Affiliation(s)
- Soliman I E Peris
- Faculty of Agriculture, Department of Animal Production, Zagazig University, Zagazig, Egypt
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7
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Chen D, Sun S, Chen Y, Wang J, Sang L, Gao C, Xie X. Effects of feeding methods on growth and slaughter performance, blood biochemical indices, and intestinal morphology in Minxinan black rabbits (Oryctolagus cuniculus). Trop Anim Health Prod 2023; 55:51. [PMID: 36708435 PMCID: PMC9884254 DOI: 10.1007/s11250-023-03467-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 01/17/2023] [Indexed: 01/29/2023]
Abstract
Feed restriction after weaning is a common strategy used in commercial rabbit farms to improve feed efficiency, promote health, and reduce mortality. However, few studies have investigated the feed restrictions of Minxinan black rabbits (Oryctolagus cuniculus). Thus, the effects of feed restriction on growth and slaughter performance, intestinal morphology, and blood biochemical indices of Minxinan black rabbits were evaluated in this study. Rabbits in group A (control group) had ad libitum intake, while those in feed restriction groups (groups B, C, and D) were restricted to 80% of the average daily feed intake (ADFI) of group A the day before. The rabbits in group B were fed once per day at 8:00 am. Rabbits in groups C and D were fed twice per day at 8:00 am (50%) and 4:00 pm (50%) and 8:00 am (30%) and 4:00 pm (70%), respectively. The experimental period lasted for 8 weeks. Compared to that in group A, the diarrhea rate of group C was significantly decreased (P < 0.05), and the ADFI, feed conversion ratio, abdominal fat weight, abdominal fat rate, total protein, albumin, globulin, alanine aminotransferase (ALT), low-density lipoprotein, and intestinal crypt depth of all feed restriction groups were significantly reduced (P < 0.01). Feed conversion ratio in group D was significantly better than that in groups B and C (P < 0.05). The efficiency index (EI) of groups C and D was higher than that of groups A and B (P < 0.01). Triglyceride levels in groups C and D were significantly lower than those in group A. The villus length to crypt depth of the duodenum and jejunum in group D was significantly higher than that in group A (P < 0.01). In conclusion, the following parameters can be improved by feed restriction: feed conversion ratio, diarrhea rate, abdominal fat rate, serum ALT, lipid indices and intestinal health of Minxinan black rabbits, and the EI of the farm. Feeding twice per day, 30% at 8:00 am and 70% at 4:00 pm, had the best comprehensive effects.
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Affiliation(s)
- DongJin Chen
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fuzhou, 350013, China.,Fujian Key Laboratory of Animal Genetics and Breeding, Fuzhou, 350013, China
| | - ShiKun Sun
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fuzhou, 350013, China.,Fujian Key Laboratory of Animal Genetics and Breeding, Fuzhou, 350013, China
| | - YanFeng Chen
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fuzhou, 350013, China.,Fujian Key Laboratory of Animal Genetics and Breeding, Fuzhou, 350013, China
| | - JinXiang Wang
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fuzhou, 350013, China.,Fujian Key Laboratory of Animal Genetics and Breeding, Fuzhou, 350013, China
| | - Lei Sang
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fuzhou, 350013, China.,Fujian Key Laboratory of Animal Genetics and Breeding, Fuzhou, 350013, China
| | - ChengFang Gao
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fuzhou, 350013, China.,Fujian Key Laboratory of Animal Genetics and Breeding, Fuzhou, 350013, China
| | - XiPing Xie
- Institute of Animal Husbandry and Veterinary Medicine, Fujian Academy of Agricultural Sciences, Fuzhou, 350013, China. .,Fujian Key Laboratory of Animal Genetics and Breeding, Fuzhou, 350013, China.
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Landim AV, Peres MCR, Costa HHA, Silveira RMF, Costa AC, Parente MDOM, Mourão GB, McManus CM. Feeding restriction in the pre and postpartum period of hair ewes raised in the semi-arid region: implications on performance and carcass traits of the progeny. Trop Anim Health Prod 2022; 54:303. [DOI: 10.1007/s11250-022-03279-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 08/31/2022] [Indexed: 11/29/2022]
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9
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Martignon M, Burel C, Guinebretière M, Postollec G, Huonnic D, Boilletot E, Michel V, Gidenne T. Feeding behaviour of the growing rabbit fed freely or restricted, and impact on performances and digestive organs. WORLD RABBIT SCIENCE 2022. [DOI: 10.4995/wrs.2022.14513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
This study aimed to determine how rabbits’ feeding and drinking behaviour was influenced by a feed restriction programme, and how performance and the morphometry of the digestive tract and lymphoid organs were influenced. At weaning (28 d old), 432 rabbits were housed in cages of 6, and allotted to 2 groups according to feed intake level: ad libitum feeding (AL group) from 28 to 72 d old, and feed intake (R group) restricted to 70% of AL intake from 28 till 49 d old, followed by ad libitum feeding from 50 till 72 d old. During the restriction, the R group intake was 36% lower than that of the AL group. When returning to an ad libitum feeding, the R group intake increased by 270%, thus exceeding the AL intake by 26% (P=0.03). The daily weight gain was reduced by 28% for R group during the restriction (40.0 vs. 55.7 g/d; P<0.001), whereas the feed conversion was improved (−11%, 1.86 vs. 2.09; P<0.001). The restriction led to a shorter intestine (−15%, 202 vs. 233; P<0.05) and lighter spleen (−15%, 4.8 vs. 5.9; P<0.05), whereas the number of Peyer patches was not influenced. Most of the growth delays of lymphoid tissues observed at the end of the restriction period in the R rabbits remained until the end of the experiment. The feeding activity of AL rabbits mainly occurred during the dark period (19:00-09:00), with 16% of rabbits eating. The R group strongly and massively started their feeding activity at feed distribution time (8:30-09:00), with 65% of rabbit eating at the start, then 35% still eating half an hour later. Feeding activity of R group remained high for 8 h after the feed distribution, with 28% of rabbits having a feeding activity between 9:30 and 17:00. R group had a higher number of meals (+30%) and drinks (+28%), and a longer meal duration (+30%) compared to AL group. R group consumed 63% of the intake within 6-7 h compared to ad libitum fed rabbits, which spread their intake over 15 h. No changes in social behaviour (access to feed or drinking, resting, aggressiveness) were detected, suggesting that this restriction programme did not impair welfare compared to that of ad libitum fed animals.
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10
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Sánchez JP, Ragab M, Mínguez C, Piles M. Genotype by feeding regimen interactions for slaughter traits in rabbit and expected responses under restricted and full feeding. J Anim Breed Genet 2022; 139:530-539. [PMID: 35557470 DOI: 10.1111/jbg.12719] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 05/03/2022] [Indexed: 11/30/2022]
Abstract
The interaction between the genotype and feeding regimen (G×FR) for slaughter traits was estimated from data corresponding to 2557 animals under full (FF) and 2424 with restricted feeding (RF). Expected responses to selection under different scenario regarding feeding regimen were also calculated. Body weight at slaughter (SW), carcass weight (CW) and dressing out percentage (DoP) were analysed by using linear animal models in which records obtained under different feeding regimes were treated as different traits. Animals belonged to Caldes line, selected for average daily gain (G) under ad libitum feeding. The selection process information was included in the analyses. Marginal posterior mean of heritabilities were 0.102 for G, and 0.364, 0.257 and 0.167 for SW, CW and DoP under FF feeding. The corresponding values for animals fed on RF were 0.243, 0.203 and 0.379 for SW, CW and DoP, respectively. Genetic correlations between G and CW were positive and moderate, and those between G and DoP were low. The estimated genetic correlation between SW, CW and DoP under different feeding regimens were: 0.73, 0.69 and 0.87, respectively. These correlations cannot be said to be far enough from one to generate relevant G×FR interaction variance, which were estimated to be only 11.1%, 8.6% and 5.3% of the mean of the phenotypic variance for SW, CW and DoP, respectively. This lack of G×FR interaction variance, jointly with the higher heritability of DoP under RF, explains that the genetic improvement of DoP can be done more efficiently recording traits on animals under RF, even if the interest is on the performances under FF, i.e. by indirect selection.
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Affiliation(s)
- Juan Pablo Sánchez
- Genetica i Millora Animal, Institut de Recerca i Tecnologia Agroalimentàries, Barcelona, Spain
| | - Mohamed Ragab
- Genetica i Millora Animal, Institut de Recerca i Tecnologia Agroalimentàries, Barcelona, Spain.,Poultry Production Department, Kafer El-Sheikh Univ., Kafer El-Sheikh, Egypt
| | - Carlos Mínguez
- Departamento de Producción Animal y Salud Publica, Facultad de Veterinaria y Ciencias Experimentales, Universidad Católica de Valencia San Vicente Martir, Valencia, Spain
| | - Miriam Piles
- Genetica i Millora Animal, Institut de Recerca i Tecnologia Agroalimentàries, Barcelona, Spain
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Alabiso M, Maniaci G, Bonanno A, Grigoli A. A 3-week post-weaning restricted feeding as alternative to an ad libitum antibiotic-medicated feed: effects on growth, carcass and meat of rabbits differing in genotype and slaughter age. Livest Sci 2022. [DOI: 10.1016/j.livsci.2022.104958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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12
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Ebeid TA, Tůmová E, Al-Homidan IH, Ketta M, Chodová D. The potential role of feed restriction on productivity, carcass composition, meat quality, and muscle fibre properties of growing rabbits: A review. Meat Sci 2022; 191:108845. [DOI: 10.1016/j.meatsci.2022.108845] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 05/06/2022] [Accepted: 05/07/2022] [Indexed: 10/18/2022]
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13
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Wang QJ, Guo Y, Zhang KH, Zhang L, Geng SX, Shan CH, Liu P, Zhu MQ, Jin QY, Liu ZY, Wang MZ, Li MY, Liu M, An L, Tian JH, Wu ZH. Night-Restricted Feeding Improves Gut Health by Synchronizing Microbe-Driven Serotonin Rhythm and Eating Activity-Driven Body Temperature Oscillations in Growing Rabbits. Front Cell Infect Microbiol 2022; 11:771088. [PMID: 34976857 PMCID: PMC8718905 DOI: 10.3389/fcimb.2021.771088] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Accepted: 12/02/2021] [Indexed: 01/04/2023] Open
Abstract
The circadian misalignment of the gut microbiota caused by unusual eating times in adult animals is related to disease development. However, whether the composition and diurnal rhythm of gut microbiota can be optimized by synchronizing the window period of eating with natural eating habits to reduce the risk of diarrhea remains unclear, especially in growing animals. In this study, 108 5-week-old weaned rabbits (nocturnal animals) were randomly subjected to daytime feeding (DF) and night-restricted feeding (NRF). At age 12 weeks, six rabbits were selected from each group, and caecum and cecal contents, as well as serum samples were collected at 4-h intervals during 24 h. Overall, NRF was found to reduce the risk of diarrhea in growing rabbits, improved the diurnal rhythm and abundance of beneficial microorganisms, along with the production of beneficial metabolites, whereas reduced the abundance of potential pathogens (Synergistes, Desulfovibrio, and Alistipes). Moreover, NRF improved diurnal rhythm of tryptophan hydroxylase isoform 1 and serotonin. Furthermore, NRF strengthened the diurnal amplitude of body core temperature, and promoted the diurnal expression of intestinal clock genes (BMAL1, CLOCK, REV-ERBα, and PER1), and genes related to the regulation of the intestinal barrier (CLAUDIN-1), and intestinal epithelial cell self-proliferation and renewal (BMI1). In vitro simulation experiments further revealed that synchronization of microbial-driven serotonin rhythm and eating activity-driven body temperature oscillations, which are important zeitgebers, could promote the diurnal expression of clock genes and CLAUDIN-1 in rabbit intestinal epithelial cells (RIEC), and enhance RIEC proliferation. This is the first study to reveal that NRF reprograms the diurnal rhythm of the gut microbiome, promotes the diurnal expression of clock genes and tight junction genes via synchronization of microbial-driven serotonin rhythm and eating activity-driven body temperature oscillations, thereby improving intestinal health and reducing the risk of diarrhea in growing rabbits. Collectively, these results provide a new perspective for the healthy feeding and management of growing animals.
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Affiliation(s)
- Qiang-Jun Wang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Yao Guo
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Ke-Hao Zhang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Lei Zhang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Shi-Xia Geng
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Chun-Hua Shan
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Peng Liu
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Meng-Qi Zhu
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Qiong-Yu Jin
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Zhong-Ying Liu
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Mei-Zhi Wang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Ming-Yong Li
- National Rabbit Industry Technology System Qingdao Comprehensive Experimental Station, Qingdao, China
| | - Man Liu
- National Rabbit Industry Technology System Qingdao Comprehensive Experimental Station, Qingdao, China
| | - Lei An
- Key Laboratory of Animal Genetics, Breeding and Reproduction of the Ministry of Agriculture and Rural Affairs, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Jian-Hui Tian
- Key Laboratory of Animal Genetics, Breeding and Reproduction of the Ministry of Agriculture and Rural Affairs, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Zhong-Hong Wu
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
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Time-based restriction and refeeding programmes in growing rabbits: Effects on feeding behaviour, feed efficiency, nutrient digestibility, and caecal fermentative activity. Anim Feed Sci Technol 2021. [DOI: 10.1016/j.anifeedsci.2021.115128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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15
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Velasco-Galilea M, Piles M, Ramayo-Caldas Y, Sánchez JP. The value of gut microbiota to predict feed efficiency and growth of rabbits under different feeding regimes. Sci Rep 2021; 11:19495. [PMID: 34593949 PMCID: PMC8484599 DOI: 10.1038/s41598-021-99028-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 09/13/2021] [Indexed: 02/08/2023] Open
Abstract
Gut microbiota plays an important role in nutrient absorption and could impact rabbit feed efficiency. This study aims at investigating such impact by evaluating the value added by microbial information for predicting individual growth and cage phenotypes related to feed efficiency. The dataset comprised individual average daily gain and cage-average daily feed intake from 425 meat rabbits, in which cecal microbiota was assessed, and their cage mates. Despite microbiota was not measured in all animals, consideration of pedigree relationships with mixed models allowed the study of cage-average traits. The inclusion of microbial information into certain mixed models increased their predictive ability up to 20% and 46% for cage-average feed efficiency and individual growth traits, respectively. These gains were associated with large microbiability estimates and with reductions in the heritability estimates. However, large microbiabililty estimates were also obtained with certain models but without any improvement in their predictive ability. A large proportion of OTUs seems to be responsible for the prediction improvement in growth and feed efficiency traits, although specific OTUs taxonomically assigned to 5 different phyla have a higher weight. Rabbit growth and feed efficiency are influenced by host cecal microbiota, thus considering microbial information in models improves the prediction of these complex phenotypes.
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Affiliation(s)
- María Velasco-Galilea
- grid.8581.40000 0001 1943 6646Animal Breeding and Genetics, Institute of Agrifood Research and Technology (IRTA), Caldes de Montbui, 08140 Barcelona, Spain
| | - Miriam Piles
- grid.8581.40000 0001 1943 6646Animal Breeding and Genetics, Institute of Agrifood Research and Technology (IRTA), Caldes de Montbui, 08140 Barcelona, Spain
| | - Yuliaxis Ramayo-Caldas
- grid.8581.40000 0001 1943 6646Animal Breeding and Genetics, Institute of Agrifood Research and Technology (IRTA), Caldes de Montbui, 08140 Barcelona, Spain
| | - Juan P. Sánchez
- grid.8581.40000 0001 1943 6646Animal Breeding and Genetics, Institute of Agrifood Research and Technology (IRTA), Caldes de Montbui, 08140 Barcelona, Spain
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16
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Effect of access to outdoor grazing and stocking density on space and pasture use, behaviour, reactivity, and growth traits of weaned rabbits. Animal 2021; 15:100334. [PMID: 34392194 DOI: 10.1016/j.animal.2021.100334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 07/06/2021] [Accepted: 07/08/2021] [Indexed: 11/22/2022] Open
Abstract
In a context of evolving concern over housing conditions of farmed rabbits, we developed a housing system that allows access to an outdoor area. The aim was to study the health status, growth and behaviour of rabbits raised at two stocking densities with access to a paddock, or not. We distributed 299 weaned rabbits in four groups (YH: 100, NH: 99, YL: 50 and NL: 50) using a 2 × 2 factorial design including access (Y: yes) or not (N: not) to a 23 m2 paddock and the indoor stocking density (H, high: 17 or L, low: 9 rabbits/m2). We measured the growth and health status of each animal weekly for 42 days (from 31 to 73 days of age) and performed reactivity tests to a new environment, a human and new object. We also assessed the rabbits' behaviour at days 26 and 40 by doing a visual scan of each animal at regular time intervals. Our results showed that stocking density had no effect on mortality, but mortality tended to increase with outdoor access from 3.0% to 7.0% (P < 0.10). Although the stocking density had no effect on average daily gain, it was higher in rabbits in the N group than in the Y group (+3.6 g/day; P < 0.05). Rabbits entered the paddocks for the first time in less time at the beginning of the trial (50 s at day 3 vs 10 min at day 31; P < 0.001). The proportion of rabbits outside after 20 min of the new environment test was higher among rabbits in the L group than in the H group (+24% points at day 3 and +11% points at day 20; P < 0.001). Regardless of the stocking density, more rabbits in the N group touched the experimenter's hand (16% vs 27%; P < 0.05) and the new object (34% vs 20%; P < 0.05) than rabbits in the Y group. Inactivity was more frequent in rabbits inside the pens than in the paddocks (70.0% vs 34.2% at days 26 and 40; P < 0.05). Locomotion was more frequent in the paddocks than in the indoor pens (20.0% vs 7.2% at days 26 and 40; P < 0.05). The stocking density did not affect the behavioural traits measured. In conclusion, providing rabbits access to a paddock could allow them to fulfil some natural behaviours but slightly reduced their growth.
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Effect of total replacement of the soya bean meal by lupine seeds (L. albus and L. luteus) on performance and digestion characteristics of growing rabbits. Anim Feed Sci Technol 2021. [DOI: 10.1016/j.anifeedsci.2021.114996] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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18
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Impact of feed restriction and fragmented feed distribution on performance, intake behaviour and digestion of the growing rabbit. Animal 2021; 15:100270. [PMID: 34167022 DOI: 10.1016/j.animal.2021.100270] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 04/30/2021] [Accepted: 05/04/2021] [Indexed: 11/23/2022] Open
Abstract
Postweaning feed restriction preserves rabbit digestive health after weaning, but the underlying physiological mechanisms are not yet understood. To elucidate whether the feeding intake pattern modification related to feed restriction might be involved, we studied the effects of both feed intake quantity and intake frequency. Animals were allotted at weaning (28 d old) in a 2 × 2 factorial design: feed intake quantity (AL = ad libitum vs R = 75% of AL) and fragmented feed distribution (FFD) (1 vs 13 distributions), thus forming four groups (AL1, AL13, R1 and R13). New Zealand White growing rabbits were used from weaning to slaughter (70 d old), to analyse mortality, morbidity, performance, intake behaviour, digestion and microbial activity. Seven days after starting feed restriction (35 d old, group R1), rabbits consumed 44% of the feed within 2 h, 65% in 4 h and in 7 h over 95%. Over the 28-70 d period, mortality was low (5.3%) while morbidity averaged 18.5% and neither was affected by treatment. However, FFD tended to decrease the morbidity rate during the first 14 days after weaning (P = 0.06). Feed conversion (28-70 d) was improved by restriction (+15%, P < 0.001) and by FFD (+5%, P < 0.001). Nutrient digestibility was improved by restriction (+10% for energy, P < 0.01), but not by FFD. Fragmented feed distribution led to a lower stomachal pH, in the antrum (1.48 vs 2.13, P < 0.001) and in the fundus (1.52 vs 2.63, P < 0.001), while a higher pH was found in the caecum (6.07 vs 5.86, P < 0.001). Butyrate proportion in the caecum was reduced by four units for restricted groups. Fragmented feed distribution reduced the caecal VFA concentration by 23% within restricted rabbit groups only. A similar interaction between intake level and FFD was observed for fibrolytic activity (cellulase and xylanase). The diversity of caecal bacterial community was not modified by either of the two factors studied. Globally, fragmented meals have no major impacts on the caecal microbial activity, diversity, and thus would not be implicated in the better resistance of restricted rabbit to digestive troubles.
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19
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Influences of dietary herbal blend and feed restriction on growth, carcass characteristics and gut microbiota of growing rabbits. ITALIAN JOURNAL OF ANIMAL SCIENCE 2021. [DOI: 10.1080/1828051x.2021.1926348] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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20
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The Health and Welfare of Rabbits as Indicated by Post-Mortem Findings at the Slaughterhouse. Animals (Basel) 2021; 11:ani11030659. [PMID: 33801416 PMCID: PMC8000563 DOI: 10.3390/ani11030659] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 02/25/2021] [Indexed: 11/22/2022] Open
Abstract
Simple Summary Veterinary inspection at the slaughterhouse plays an important role in the surveillance system for animal health and welfare. The study focused on the quantification and identification of pathological findings in rabbits slaughtered at the slaughterhouses in the Czech Republic in the period from 2010 to 2019. The ratio of the number of pathological findings to the total number of rabbits slaughtered was 0.0214, i.e., for every hundred rabbits, 2.14 findings were made documenting the impairment of health and/or welfare to an extent leading to pathological changes detected during the post-mortem inspection of the rabbits at the slaughterhouse. The pathological findings that occurred most often were those on the limbs (0.84%), trunk (0.71%), kidneys (0.17%), and liver (0.05%), along with generalized changes (0.37%). The results show that findings on the limbs and trunk were dominated by findings of traumatic origin. Findings in the kidneys and liver were most often of a chronic nature. Findings of abscesses were most frequent among generalized findings. Abstract The aim of the study was to assess post-mortem findings according to their localization and the nature of damage and to assess the standard of health and welfare of farmed rabbits on the basis of these findings. A total of 40,206 pathological findings were recorded in 1,876,929 rabbits slaughtered at slaughterhouses in the Czech Republic in the period from 2010 to 2019. Pathological findings on the limbs (0.84%), the trunk (0.71%), the kidneys (0.17%), and the liver (0.05%), along with generalized changes (0.37%), occurred most frequently. Findings of traumatic origin dominated among findings on the limbs and trunk, which indicates the inappropriate housing and handling rabbits on farms and during transport. Findings in the kidneys and liver were most often of a chronic nature having an evident correlation with the diet of intensively fed rabbits, with shortcomings in the diet having an impact on the parenchyma with chronic manifestations in the liver and kidneys. Among the generalized findings, multiple abscesses, which were probably associated with the infection of injuries occurring during fattening, and emaciation resulting from current husbandry practices, leading to insufficient feed intake or the development of disease in some individuals, predominated.
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21
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Velasco-Galilea M, Guivernau M, Piles M, Viñas M, Rafel O, Sánchez A, Ramayo-Caldas Y, González-Rodríguez O, Sánchez JP. Breeding farm, level of feeding and presence of antibiotics in the feed influence rabbit cecal microbiota. Anim Microbiome 2020; 2:40. [PMID: 33499975 PMCID: PMC7807820 DOI: 10.1186/s42523-020-00059-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 10/16/2020] [Indexed: 02/07/2023] Open
Abstract
Background The effect of the production environment and different management practices in rabbit cecal microbiota remains poorly understood. While previous studies have proved the impact of the age or the feed composition, research in the breeding farm and other animal management aspects, such as the presence of antibiotics in the feed or the level of feeding, is still needed. Characterization of microbial diversity and composition of growing rabbits raised under different conditions could help better understand the role these practices play in cecal microbial communities and how it may result in different animal performance. Results Four hundred twenty-five meat rabbits raised in two different facilities, fed under two feeding regimes (ad libitum or restricted) with feed supplemented or free of antibiotics, were selected for this study. A 16S rRNA gene-based assessment through the MiSeq Illumina sequencing platform was performed on cecal samples collected from these individuals at slaughter. Different univariate and multivariate approaches were conducted to unravel the influence of the different factors on microbial alpha diversity and composition at phylum, genus and OTU taxonomic levels. The animals raised in the facility harboring the most stable environmental conditions had greater, and less variable, microbial richness and diversity. Bootstrap univariate analyses of variance and sparse partial least squares-discriminant analyses endorsed that farm conditions exerted an important influence on rabbit microbiota since the relative abundances of many taxa were found differentially represented between both facilities at all taxonomic levels characterized. Furthermore, only five OTUs were needed to achieve a perfect classification of samples according to the facility where animals were raised. The level of feeding and the presence of antibiotics did not modify the global alpha diversity but had an impact on some bacteria relative abundances, albeit in a small number of taxa compared with farm, which is consistent with the lower sample classification power according to these factors achieved using microbial information. Conclusions This study reveals that factors associated with the farm effect and other management factors, such as the presence of antibiotics in the diet or the feeding level, modify cecal microbial communities. It highlights the importance of offering a controlled breeding environment that reduces differences in microbial cecal composition that could be responsible for different animal performance.
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Affiliation(s)
- María Velasco-Galilea
- Institute of Agrifood Research and Technology (IRTA) - Animal Breeding and Genetics, E08140 Caldes de Montbui, Barcelona, Spain.
| | - Miriam Guivernau
- Institute of Agrifood Research and Technology (IRTA) - Integral Management of Organic Waste, E08140 Caldes de Montbui, Barcelona, Spain
| | - Miriam Piles
- Institute of Agrifood Research and Technology (IRTA) - Animal Breeding and Genetics, E08140 Caldes de Montbui, Barcelona, Spain
| | - Marc Viñas
- Institute of Agrifood Research and Technology (IRTA) - Integral Management of Organic Waste, E08140 Caldes de Montbui, Barcelona, Spain
| | - Oriol Rafel
- Institute of Agrifood Research and Technology (IRTA) - Animal Breeding and Genetics, E08140 Caldes de Montbui, Barcelona, Spain
| | - Armand Sánchez
- Animal Genomics Group, Centre for Research in Agricultural Genomics (CRAG) CSIC-IRTA-UAB-UB, Campus UAB, Catalonia, Spain.,Unit of Animal Science, Department of Animal and Food Science, Autonomous University of Barcelona, Barcelona, Spain
| | - Yuliaxis Ramayo-Caldas
- Institute of Agrifood Research and Technology (IRTA) - Animal Breeding and Genetics, E08140 Caldes de Montbui, Barcelona, Spain
| | - Olga González-Rodríguez
- Institute of Agrifood Research and Technology (IRTA) - Animal Breeding and Genetics, E08140 Caldes de Montbui, Barcelona, Spain
| | - Juan P Sánchez
- Institute of Agrifood Research and Technology (IRTA) - Animal Breeding and Genetics, E08140 Caldes de Montbui, Barcelona, Spain
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Crespo R, Alfonso C, del Barrio AS, García-Ruiz AI, Marco M, Nicodemus N. Effect of feed restriction on performance, carcass yield and nitrogen and energy balance in growing rabbits. Livest Sci 2020. [DOI: 10.1016/j.livsci.2020.104278] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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23
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Birolo M, Trocino A, Zuffellato A, Xiccato G. Time-based feed restriction and group composition in growing rabbits: Effects on feed intake pattern, growth performance, carcass traits and meat quality. Livest Sci 2020. [DOI: 10.1016/j.livsci.2020.104086] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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24
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Garcia-Dominguez X, Vicente JS, Viudes-de-Castro MP, Marco-Jiménez F. Long-Term Effects Following Fresh/Vitrified Embryo Transfer Are Transmitted by Paternal Germline in a Large Size Rabbit Cohort. Animals (Basel) 2020; 10:ani10081272. [PMID: 32722445 PMCID: PMC7460406 DOI: 10.3390/ani10081272] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/15/2020] [Accepted: 07/24/2020] [Indexed: 01/26/2023] Open
Abstract
The concept of developmental programming suggests that the early life environment influences offspring phenotype in later life, whose effects may also be manifested in further generations. Valuable pieces of evidence come from the fields applying assisted reproductive technologies (ARTs), which deprive embryos of their optimal maternal environment and were thus associated with subsequent developmental deviations. Recently, we demonstrated that the in vitro manipulations during a vitrified embryo transfer procedure incurs a cumulative and transgenerational decline in the growth performance of the resulting offspring. Here, we provide a longitudinal study to investigate whether previous developmental deviations could be indistinctly paternally or maternally transmitted using crossbred mattings. Our findings revealed that early embryo manipulations through fresh and vitrified embryo transfer incurred paternally transmissible effects over the growth pattern and adult body weight, which seemed not inheritable via the female germline. Similar inheritable effects were observed after fresh and vitrified embryo transfer, suggesting that disturbing optimal embryo development through in vitro manipulations was the principal trigger of transmissible effects, rather than embryo cryopreservation per se.
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Affiliation(s)
- Ximo Garcia-Dominguez
- Instituto de Ciencia y Tecnología Animal, Universitat Politècnica de València, 46022 Valencia, Spain; (X.G.-D.); (J.S.V.)
| | - José Salvador Vicente
- Instituto de Ciencia y Tecnología Animal, Universitat Politècnica de València, 46022 Valencia, Spain; (X.G.-D.); (J.S.V.)
| | - María P. Viudes-de-Castro
- Centro de Investigación y Tecnología Animal, Instituto Valenciano de Investigaciones Agrarias, 12100 Segorbe, Spain;
| | - Francisco Marco-Jiménez
- Instituto de Ciencia y Tecnología Animal, Universitat Politècnica de València, 46022 Valencia, Spain; (X.G.-D.); (J.S.V.)
- Correspondence:
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Garcia-Dominguez X, Marco-Jiménez F, Peñaranda DS, Vicente JS. Long-Term Phenotypic and Proteomic Changes Following Vitrified Embryo Transfer in the Rabbit Model. Animals (Basel) 2020; 10:E1043. [PMID: 32560425 PMCID: PMC7341293 DOI: 10.3390/ani10061043] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 06/12/2020] [Accepted: 06/15/2020] [Indexed: 02/07/2023] Open
Abstract
Nowadays, assisted reproductive technologies (ARTs) are considered valuable contributors to our past, but a future without their use is inconceivable. However, in recent years, several studies have evidenced a potential impact of ART on long-term development in mammal species. To date, the long-term follow-up data are still limited. So far, studies have mainly focused on in vitro fertilization or in vitro culture, with information from gametes/embryos cryopreservation field being practically missing. Herein, we report an approach to determine whether a vitrified embryo transfer procedure would have long-term consequences on the offspring. Using the rabbit as a model, we compared animals derived from vitrified-transferred embryos versus those naturally conceived, studying the growth performance, plus the weight throughout life, and the internal organs/tissues phenotype. The healthy status was assessed over the hematological and biochemical parameters in peripheral blood. Additionally, a comparative proteomic analysis was conducted in the liver tissue to investigate molecular cues related to vitrified embryo transfer in an adult tissue. After vitrified embryo transfer, birth weight was increased, and the growth performance was diminished in a sex-specific manner. In addition, vitrified-transferred animals showed significantly lower body, liver and heart weights in adulthood. Molecular analyses revealed that vitrified embryo transfer triggers reprogramming of the liver proteome. Functional analysis of the differentially expressed proteins showed changes in relation to oxidative phosphorylation and dysregulations in the zinc and lipid metabolism, which has been reported as possible causes of a disturbed growth pattern. Therefore, we conclude that vitrified embryo transfer is not a neutral procedure, and it incurs long-term effects in the offspring both at phenotypic and molecular levels. These results described a striking example of the developmental plasticity exhibited by the mammalian embryo.
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Affiliation(s)
| | | | | | - José Salvador Vicente
- Instituto de Ciencia y Tecnología Animal, Universitat Politècnica de València, 46022 Valencia, Spain; (X.G.-D.); (F.M.-J.); (D.S.P.)
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26
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Effects of time-based feed restriction on morbidity, mortality, performance and meat quality of growing rabbits housed in collective systems. Animal 2020; 14:626-635. [DOI: 10.1017/s1751731119002283] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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27
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The birth weight of rabbits: Influencing factors and effect on behavioural, productive and reproductive traits: A review. Livest Sci 2019. [DOI: 10.1016/j.livsci.2019.103841] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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28
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Gasco L, Dabbou S, Trocino A, Xiccato G, Capucchio MT, Biasato I, Dezzutto D, Birolo M, Meneguz M, Schiavone A, Gai F. Effect of dietary supplementation with insect fats on growth performance, digestive efficiency and health of rabbits. J Anim Sci Biotechnol 2019; 10:4. [PMID: 30675348 PMCID: PMC6337837 DOI: 10.1186/s40104-018-0309-2] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 12/18/2018] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND The present work aimed at evaluating the effect of the dietary replacement of soybean oil (S) by two types of insect fats extracted from black soldier fly larvae (H, Hermetia illucens L.) and yellow mealworm larvae (T, Tenebrio molitor L.) on growth performance, nutrient digestibility, blood parameters, intestinal morphology and health of growing rabbits. METHODS At weaning, 200 crossbred rabbits (36 days old) were allotted to five dietary treatments (40 rabbits/group): a control diet (C) containing 1.5% of soybean oil and four experimental diets where soybean oil was partially (50%) or totally (100%) substituted by H (H50 and H100) or T (T50 and T100) fats. Total tract digestibility was evaluated on 12 rabbits per treatment. The growth trial lasted 41 d and, at slaughtering (78 days old), blood samples were collected from 15 rabbits per treatment, morphometric analyses were performed on duodenum, jejunum and ileum mucosa, and samples of liver, spleen and kidney were submitted to histological evaluation. RESULTS No difference was observed between the control and the experimental groups fed insect fats in terms of performance, morbidity, mortality and blood variables. The addition of H and T fats did not influence apparent digestibility coefficients of dry matter, protein, ether extract, fibre fractions and gross energy. Gut morphometric indices and organ histopathology were not affected by dietary inclusion of H and T fats. CONCLUSIONS H and T fats are suitable sources of lipid in rabbit diets to replace soybean oil without any detrimental effect on growth performance, apparent digestibility, gut mucosa traits and health.
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Affiliation(s)
- Laura Gasco
- Department of Agricultural, Forest and Food Science, University of Turin, Largo Paolo Braccini 2, 10095 Grugliasco, Turin, Italy
| | - Sihem Dabbou
- Department of Veterinary Science, University of Turin, Largo Paolo Braccini 2, 10095 Grugliasco, Turin, Italy
| | - Angela Trocino
- Department of Comparative Biomedicine and Food Science, University of Padova, Viale dell’Università 16, 35020 Legnaro, Padova, Italy
| | - Gerolamo Xiccato
- Department of Agronomy Food Natural Resources Animal and Environment, University of Padova, Viale dell’Università 16, 35020 Legnaro, Padova, Italy
| | - Maria Teresa Capucchio
- Department of Veterinary Science, University of Turin, Largo Paolo Braccini 2, 10095 Grugliasco, Turin, Italy
| | - Ilaria Biasato
- Department of Agricultural, Forest and Food Science, University of Turin, Largo Paolo Braccini 2, 10095 Grugliasco, Turin, Italy
| | - Daniela Dezzutto
- Veterinary Medical Research Institute for Piemonte, Liguria and Valle d’Aosta, Via Bologna 148, 10154 Turin, Italy
| | - Marco Birolo
- Department of Agronomy Food Natural Resources Animal and Environment, University of Padova, Viale dell’Università 16, 35020 Legnaro, Padova, Italy
| | - Marco Meneguz
- Department of Agricultural, Forest and Food Science, University of Turin, Largo Paolo Braccini 2, 10095 Grugliasco, Turin, Italy
| | - Achille Schiavone
- Department of Veterinary Science, University of Turin, Largo Paolo Braccini 2, 10095 Grugliasco, Turin, Italy
- Institute of Science of Food Production, National Research Council, Largo Paolo Braccini 2, 10095 Grugliasco, Turin, Italy
- Institute of Interdisciplinary Research on Sustainability, University of Turin, Via Accademia Albertina 13, 10100 Turin, Italy
| | - Francesco Gai
- Institute of Science of Food Production, National Research Council, Largo Paolo Braccini 2, 10095 Grugliasco, Turin, Italy
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Delgado R, Nicodemus N, Abad-Guamán R, Menoyo D, García J, Carabaño R. Effect of arginine and glutamine supplementation on performance, health and nitrogen and energy balance in growing rabbits. Anim Feed Sci Technol 2019. [DOI: 10.1016/j.anifeedsci.2018.11.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Chodová D, Tůmová E, Volek Z. The effect of limited feed intake on carcase yield and meat quality in early weaned rabbits. ITALIAN JOURNAL OF ANIMAL SCIENCE 2018. [DOI: 10.1080/1828051x.2018.1530961] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Darina Chodová
- Katedra specialni zootechniky, Czech University of Life Sciences Prague, Praha, Czech Republic
| | - Eva Tůmová
- Katedra specialni zootechniky, Czech University of Life Sciences Prague, Praha, Czech Republic
| | - Zdeněk Volek
- Vyzkumny ustav zivocisne vyroby, Praha, Czech Republic
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Yang Y, Shen Y, Pan Y, Xia P, Zhang D, He Z, Yang J, Li H, Lu J. Effects of dietary sorghum dried distiller's grains with solubles on growth performance, diet nutrient digestibility, carcass characteristics and immunity in growing rabbits. J Anim Physiol Anim Nutr (Berl) 2018; 103:363-369. [DOI: 10.1111/jpn.13008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 09/09/2018] [Accepted: 09/18/2018] [Indexed: 01/01/2023]
Affiliation(s)
- Yanhong Yang
- College of Animal Science and Technology Southwest University Chongqing China
| | - Yingchun Shen
- College of Animal Science and Technology Southwest University Chongqing China
| | - Yuanqing Pan
- College of Animal Science and Technology Southwest University Chongqing China
| | - Pei Xia
- College of Animal Science and Technology Southwest University Chongqing China
| | - Deguang Zhang
- College of Animal Science and Technology Southwest University Chongqing China
| | - Zhifei He
- College of Food Science Southwest University Chongqing China
| | - Jiqiong Yang
- Chongqing Municipal Agricultural School Chongqing China
| | - Hongjun Li
- College of Food Science Southwest University Chongqing China
| | - Jingzhi Lu
- College of Animal Science and Technology Southwest University Chongqing China
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Lu J, Shen Y, He Z, Dai X, Wang D, Zhang J, Li H. Effects of a short-term feed restriction on growth performance, blood metabolites and hepatic IGF-1 levels in growing rabbits. WORLD RABBIT SCIENCE 2017. [DOI: 10.4995/wrs.2017.6478] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
<p class="Abstract">A total of 144 weaned hybrid HYLA rabbits (40-day-old) were randomly divided into 4 groups, to investigate the effects of the intensity of one week’s feed restriction on short- and medium-term growth performance, blood metabolites and hepatic IGF-1 in growing rabbits. Restricted groups were fed with 30% (Group L30), 50% (Group L50) 70% (Group L70) of ad libitum feeding for 1 wk and then fed ad libitum until the end of the experiment (75 d of age). The control group (Group AL) was fed ad libitum throughout the experiment. Total feed intake (–15.8%) and feed conversion ratio (–13.2%) were lower in the L50 than in the AL group (P<0.05), but no difference was found between the L30, L70 and AL groups (P>0.05) for these parameters. Total weight gain did not significantly differ among the 4 experimental groups (38.5 g/d; P>0.05). At the end of the feed restriction period, the total serum protein level (P=0.01) was higher in restricted rabbits than AL rabbits (P<0.01), while the hepatic IGF-1 level was lower in L30 and L50 groups than in the 2 other groups (P<0.001). However, no difference remained between groups at the end of the experiment. In contrast, calcium, triglycerides, alkaline phosphatase, urea nitrogen and total cholesterol levels were similar between groups (P>0.05) throughout the experiment. In conclusion, a short-term feed restriction improves feed conversion ratio in a lasting way, transiently alters serum protein and IFG-1 levels and leads to compensatory growth in growing rabbits.</p>
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Lu J, Long X, He Z, Shen Y, Yang Y, Pan Y, Zhang J, Li H. Effect of dietary inclusion of dried citrus pulp on growth performance, carcass characteristics, blood metabolites and hepatic antioxidant status of rabbits. JOURNAL OF APPLIED ANIMAL RESEARCH 2017. [DOI: 10.1080/09712119.2017.1355806] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Jingzhi Lu
- College of Animal Science and Technology, Southwest University, Chongqing, People’s Republic of China
| | - Xianghua Long
- College of Animal Science and Technology, Southwest University, Chongqing, People’s Republic of China
- Agricultural Bureau of Shuicheng County, Guizhou, People’s Republic of China
| | - Zhifei He
- College of Food Science, Southwest University, Chongqing, People’s Republic of China
| | - Yingchun Shen
- College of Animal Science and Technology, Southwest University, Chongqing, People’s Republic of China
| | - Yanhong Yang
- College of Animal Science and Technology, Southwest University, Chongqing, People’s Republic of China
| | - Yuanqing Pan
- College of Animal Science and Technology, Southwest University, Chongqing, People’s Republic of China
| | - Jiahua Zhang
- College of Animal Science and Technology, Southwest University, Chongqing, People’s Republic of China
| | - Hongjun Li
- College of Food Science, Southwest University, Chongqing, People’s Republic of China
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Piles M, David I, Ramon J, Canario L, Rafel O, Pascual M, Ragab M, Sánchez JP. Interaction of direct and social genetic effects with feeding regime in growing rabbits. Genet Sel Evol 2017; 49:58. [PMID: 28728597 PMCID: PMC5520409 DOI: 10.1186/s12711-017-0333-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Accepted: 07/10/2017] [Indexed: 11/10/2022] Open
Abstract
Background Most rabbit production farms apply feed restriction at fattening because of its protective effect against digestive diseases that affect growing rabbits. However, it leads to competitive behaviour between cage mates, which is not observed when animals are fed ad libitum. Our aim was to estimate the contribution of direct (\documentclass[12pt]{minimal}
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\begin{document}$$s$$\end{document}s) genetic effects (also known as indirect genetic effects) to total heritable variance of average daily gain (\documentclass[12pt]{minimal}
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\begin{document}$${\text{ADG}}$$\end{document}ADG) in rabbits on different feeding regimens (FR), and the magnitude of the interaction between genotype and FR (G × FR). Methods A total of 6264 contemporary kits were housed in cages of eight individuals and raised on full (\documentclass[12pt]{minimal}
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\begin{document}$$F$$\end{document}F) or restricted (\documentclass[12pt]{minimal}
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\begin{document}$$R$$\end{document}R) feeding to 75% of the ad libitum intake. A Bayesian analysis of weekly records of \documentclass[12pt]{minimal}
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\begin{document}$${\text{ADG}}$$\end{document}ADG (from 32 to 60 days of age) in rabbits on \documentclass[12pt]{minimal}
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\begin{document}$$s$$\end{document}s. Results The ratio between total heritable variance and phenotypic variance (\documentclass[12pt]{minimal}
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\begin{document}$$T^{2}$$\end{document}T2) was low (<0.10) and did not differ significantly between FR. However, the ratio between \documentclass[12pt]{minimal}
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\begin{document}$$h^{2}$$\end{document}h2 (i.e. variance of \documentclass[12pt]{minimal}
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\begin{document}$$d$$\end{document}d relative to phenotypic variance) and \documentclass[12pt]{minimal}
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\begin{document}$$T^{2}$$\end{document}T2 was ~0.52 and 0.86 for animals on \documentclass[12pt]{minimal}
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\begin{document}$$s$$\end{document}s contributed more to the heritable variance of animals on \documentclass[12pt]{minimal}
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\begin{document}$$F$$\end{document}F. Feeding regimen also affected the sign and magnitude of the correlation between \documentclass[12pt]{minimal}
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\begin{document}$$s$$\end{document}s, i.e. −0.5 and ~0 for animals on \documentclass[12pt]{minimal}
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\begin{document}$$F$$\end{document}F, respectively. The posterior mean (posterior sd) of the correlation between estimated total breeding values (ETBV) of animals on \documentclass[12pt]{minimal}
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\begin{document}$$F$$\end{document}F was 0.26 (0.20), indicating very strong G × FR interactions. The correlations between \documentclass[12pt]{minimal}
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\begin{document}$$R$$\end{document}R ranged from −0.47 (\documentclass[12pt]{minimal}
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\begin{document}$$d$$\end{document}d on \documentclass[12pt]{minimal}
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\begin{document}$$R$$\end{document}R) to 0.64. Conclusions Our results suggest that selection of rabbits for \documentclass[12pt]{minimal}
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\begin{document}$${\text{ADG}}$$\end{document}ADG under \documentclass[12pt]{minimal}
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\begin{document}$${\text{ADG}}$$\end{document}ADG in rabbits on \documentclass[12pt]{minimal}
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\begin{document}$$R$$\end{document}R. Social genetic effects contribute substantially to ETBV of rabbits on \documentclass[12pt]{minimal}
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\begin{document}$$R$$\end{document}R but not on \documentclass[12pt]{minimal}
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\begin{document}$$F$$\end{document}F. Selection for \documentclass[12pt]{minimal}
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\begin{document}$${\text{ADG}}$$\end{document}ADG should be performed under production conditions regarding the FR, by accounting for \documentclass[12pt]{minimal}
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Affiliation(s)
- Miriam Piles
- Institute for Food and Agriculture Research and Technology, Torre Marimon s/n, 08140, Caldes de Montbui, Barcelona, Spain.
| | - Ingrid David
- GenPhySE, INRA, Université de Toulouse, INPT, ENVT, 31326, Castanet Tolosan, France
| | - Josep Ramon
- Institute for Food and Agriculture Research and Technology, Torre Marimon s/n, 08140, Caldes de Montbui, Barcelona, Spain
| | - Laurianne Canario
- GenPhySE, INRA, Université de Toulouse, INPT, ENVT, 31326, Castanet Tolosan, France
| | - Oriol Rafel
- Institute for Food and Agriculture Research and Technology, Torre Marimon s/n, 08140, Caldes de Montbui, Barcelona, Spain
| | - Mariam Pascual
- Institute for Food and Agriculture Research and Technology, Torre Marimon s/n, 08140, Caldes de Montbui, Barcelona, Spain
| | - Mohamed Ragab
- Institute for Food and Agriculture Research and Technology, Torre Marimon s/n, 08140, Caldes de Montbui, Barcelona, Spain.,Poultry Production Department, Kafr El-Sheikh University, Kafr El-Sheikh, 33516, Egypt
| | - Juan P Sánchez
- Institute for Food and Agriculture Research and Technology, Torre Marimon s/n, 08140, Caldes de Montbui, Barcelona, Spain
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Birolo M, Trocino A, Tazzoli M, Xiccato G. Effect of feed restriction and feeding plans on performance, slaughter traits and body composition of growing rabbits. WORLD RABBIT SCIENCE 2017. [DOI: 10.4995/wrs.2017.6748] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Two feeding systems (L, <em>ad libitum vs. </em>R, feed restriction) were combined with 3 feeding plans (MM, MH, HH) to evaluate the effects on performance, slaughter results, body composition and nitrogen balance of 300 commercial crossbred rabbits kept individually from weaning to slaughter (34-70 d of age). The R rabbits were fed from 80% (first days on trial) to 100% (end of 3rd wk) of <em>ad libitum </em>intake, whereafter R rabbits had free access to feed. The 3 feeding plans were: MM plan, M diet with moderate digestible energy (DE) content, 10.6 MJ/kg, throughout the trial; HH plan, H diet with high DE content, 11.1 MJ/kg, throughout the trial; MH plan, M diet for the first 3 wk and H diet for the last 2 wk. Feed restriction did not affect nutrient digestibility, growth rate on the whole trial and slaughter results, but improved feed conversion (2.96 <em>vs. </em>2.89 in L and R rabbits, respectively; <em>P</em><0.01) and reduced N excretion (2.16 <em>vs. </em>2.07 g excreted N/d, in L and R rabbits; <em>P</em><0.05). At the end of the first period (55 d), R rabbits showed lower empty body protein, lipid, and gross energy gains than L rabbits, but differences disappeared within the end of the trial. The HH plan improved feed conversion (2.97 <em>vs. </em>2.89 for MM <em>vs. </em>HH; <em>P</em><0.05), but increased excreted N (2.03 <em>vs. </em>2.17 g/d; <em>P</em><0.001) in comparison with the MM plan due to the higher digestible protein/DE ratio of H diet, whereas the MH plan showed intermediate results. In conclusion, a moderate feed restriction during post weaning improved feed conversion and reduced N excretion without negative effects on growth or slaughter results. Moreover, N excretion was confirmed to depend largely on dietary nitrogen content.
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Changes of haematological and biochemical indices with age in rabbits with ad libitum and limited feed intake. ACTA VET BRNO 2017. [DOI: 10.2754/avb201786010029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The aim of this study was to examine the effects of a one-week feed restriction of different intensities on haematological and biochemical blood indices at the end of the feed restriction and during the realimentation period in growing rabbits. Hyplus rabbits weaned at 35 days of age (n = 195) were divided into three groups: rabbits fedad libitum(AL) and groups with reduced feed of 50 g (R50) or 65 g (R65) per rabbit per day from 42 to 49 days of age. At the end of the feed restriction and in the following period, haematological and biochemical blood indices were measured at weekly intervals. The live weight at 70 days of age was lower (P≤ 0.001) in restricted rabbits (–14.5% and –15.5% for group R50 and R65, respectively, compared to AL). Feed restriction significantly (P≤ 0.011) decreased the number of erythrocytes (–6.2% and –7.4% for group R50 and R65, respectively, compared to AL) and haemoglobin content (P≤ 0.008). The mean corpuscular volume increased (P≤ 0.033) in restricted rabbits. Interaction of the feeding regime and age (P≤ 0.007) was observed in cholesterol with the highest concentration in R50 at 56 days (4.41 mmol/l) and the lowest in R65 at 70 days and in AL at 63 days of age (1.30 mmol/l). The concentration of non-esterified fatty acids (P≤ 0.003) and triacylglycerides (P≤ 0.048) were significantly lower in restricted rabbits. It could be concluded that feed restriction influenced mainly erythrocytes and haemoglobin. The changes in biochemical blood characteristics suggest the restriction did not affect protein metabolism, however, results indicate lipid depletion in restricted rabbits.
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Knudsen C, Combes S, Briens C, Coutelet G, Duperray J, Rebours G, Salaun JM, Travel A, Weissman D, Gidenne T. Substituting starch with digestible fiber does not impact on health status or growth in restricted fed rabbits. Anim Feed Sci Technol 2017. [DOI: 10.1016/j.anifeedsci.2017.01.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Marco-Jiménez F, García-Diego F, Vicente J. Effect of gestational and lactational exposure to heat stress on performance in rabbits. WORLD RABBIT SCIENCE 2017. [DOI: 10.4995/wrs.2017.5728] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
<p>Reproductive performance is greatly affected by environmental factors such as temperature. Heat stress (HS) during pregnancy and lactation can influence not only foetal growth but also postnatal development of kits. The aim of this study was to test the effect of HS during gestation and lactation on postnatal growth till Spanish commercial liveweight. To investigate this, 32 primiparous non lactating rabbit does were exposed to 1 of 2 environmental treatments: high temperature (between 25 and 36°C, HS group; n=16) or thermoneutral conditions (between 14 and 20°C, TN group; n=16). Does were allowed to acclimate 30 d before the artificial insemination. At birth, kits were allocated into 4 groups: HS was only applied during gestation (G group; n=54); HS was applied during gestation and lactation period (GL group; n=85); HS was only applied during lactation period (L group; n=60); and TN was applied during gestation and lactation period (C group; n=77). All litters were kept under each experimental environment until weaning at day 30. Then, litters were moved to TN temperatures until slaughter at day 63. Compared with TN does, the HS does presented lower litter size (9.7 and 11.4; P<0.05), litter weight (503.0 vs. 630.5 g; P<0.05) and kit weight at birth (56.6 vs. 61.4 g; P<0.05), as well as a higher stillborn rate (25.4 vs. 9.9%; P<0.05). The kits from does subjected to HS during gestation (G group) had similar postnatal growth compared to offspring from does gestated in TN conditions (C group), whereas kits from does that experienced HS during gestation and lactation (GL group) and during their lactation (L group) presented decreased postnatal growth. Together, these results demonstrate that kits from does that underwent HS during gestation did not alter postnatal growth until Spanish commercial liveweight, whereas HS during lactation resulted in decreased postnatal growth.</p>
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Gidenne T, Garreau H, Drouilhet L, Aubert C, Maertens L. Improving feed efficiency in rabbit production, a review on nutritional, technico-economical, genetic and environmental aspects. Anim Feed Sci Technol 2017. [DOI: 10.1016/j.anifeedsci.2017.01.016] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Impact of feed restriction and housing hygiene conditions on specific and inflammatory immune response, the cecal bacterial community and the survival of young rabbits. Animal 2017; 11:854-863. [DOI: 10.1017/s1751731116002007] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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A 3-week feed restriction after weaning as an alternative to a medicated diet: effects on growth, health, carcass and meat traits of rabbits of two genotypes. Animal 2016; 11:1608-1616. [PMID: 27998369 DOI: 10.1017/s175173111600269x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Feed restriction after weaning is widely used in meat rabbit farms to promote health and reduce mortality, but this practice impacts negatively on rabbit growth and slaughter performance. This study compared a 3-week post-weaning feed restriction with ad libitum medicated feeding, evaluating effects on feed intake, growth, health, carcass and meat quality of rabbits of two genotypes: Italian White pure breed and Hycole hybrid×Italian White crossbred. A total of 512 rabbits at 36 days of age, of both sexes and two genotypes, were divided into four homogeneous groups assigned, from 36 to 57 days of age, to different feeding programmes (FP): restricted non-medicated (R-N), ad libitum non-medicated (L-N), restricted medicated (R-M) and ad libitum medicated (L-M). The diets were medicated with oxytetracycline (1540 mg/kg) and colistin sulphate (240 mg/kg). The restriction, performed by giving 70, 80 and 90 g/day of feed for the 1st, 2nd and 3rd week, was followed by ad libitum feeding in the successive 5 weeks, up to slaughter at 92 days of age. Restricted feeds were ingested at a level of 64% of the feed intake recorded in the ad libitum fed rabbits; it was significantly associated, regardless of medication and rabbit genotype, with a lower feed intake (-22 to -24 g dry matter/day) during the entire experiment, compensatory growth and a lower feed conversion ratio in the ad libitum period, and a lower final live weight (-150 g) than ad libitum feeding (P<0.001). During restriction, mortality was lower in the restricted rabbits (6.25%, 5.47% v. 12.5%, 14.8% for R-N, R-M, L-N and L-M; P<0.05), whereas in the ad libitum period mortality did not differ among the groups (9.23%, 9.90%, 11.0% and 4.59% for R-N, R-M, L-N and L-M). Dressing out percentage was not affected by FP or genotype; heavier carcasses were produced by rabbits fed ad libitum (+100 g; P<0.001) and crossbred rabbits (+122 g; P<0.001). Restriction did not alter meat quality, except for a tendency towards a higher cooking loss and less fat; crossbred meat was higher in L* (+1.3; P<0.01) and b* (+0.51; P<0.05) colour indexes and tenderness (-0.14 kg/cm2; P<0.05) than pure breed meat. Under the conditions of this study, a 3-week restricted feeding after weaning resulted to be a suitable alternative, also for high growth potential genotypes, to the antibiotics to preserve rabbit health. The production of lighter carcasses could be compensated partly by the lower feed conversion ratio showed by restricted rabbits.
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Birolo M, Trocino A, Zuffellato A, Xiccato G. Effect of feed restriction programs and slaughter age on digestive efficiency, growth performance and body composition of growing rabbits. Anim Feed Sci Technol 2016. [DOI: 10.1016/j.anifeedsci.2016.10.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Comparison of behaviour, performance and mortality in restricted and ad libitum-fed growing rabbits. Animal 2016; 9:1172-80. [PMID: 26087156 DOI: 10.1017/s1751731115000270] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
The objective of this study was to determine whether rabbits fed in a restricted regimen (75%) showed increased competition for feeding, drinking and use of specific areas of the cages as compared with those provided feed ad libitum. This evaluation was carried out by measuring their space utilisation in the cage, the incidence of agonistic behaviour and rates of mortality. In total, 504 rabbits between 31 and 66 days of age were used in this study. A total of 200 heavy-weight rabbits and 56 light-weight rabbits were randomly housed in 32 cages, each cage containing eight rabbits: 25 cages housing heavy rabbits and seven cages housing the light-weight ones. They were all fed ad libitum (AD). In addition, a total of 208 heavy-weight rabbits and 40 light-weight rabbits were randomly housed in 31 cages, each of them containing eight rabbits: 26 cages housing heavy weight rabbits and five cages housing light-weight ones. They were all fed a restricted diet (R) regimen. The restriction was calculated to be 75% of the feed consumed by the AD group. The total space available in the cage was 3252 cm(2), with a stocking density of 24.6 animals/m(2). Animals between 32 and 60 days of age from 20 different cages were observed nine times per week (morning or afternoon) by means of scan and focal sampling by one observer. During each period, cages were assessed for 5 min, registering every minute the position of all the animals in relation to Area A (feeder), Area B (central part) or Area C (back and drinker area). The incidence of agonistic behaviour such as displacement, biting and jumping on each other was also assessed. Performance variables such as daily gain and feed conversion ratio, in addition to general health status and mortality rates, were recorded for all rabbits. When the rabbits were under restricted feeding, the competition for feed and drink increased with clear signs of agonistic behaviour such as biting, displacement and animals jumping on top of each other. Although this competition was maintained during the entire growing period, the BW homogeneity between animals in the same cage was similar in both cases, suggesting that all animals could consume similar quantities of feed. The possible advantages of a restricted diet, such as better feed conversion ratio, were observed in this study only in the last few weeks of the growing period.
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Read T, Combes S, Gidenne T, Destombes N, Grenet L, Fortun-Lamothe L. Feed composition at the onset of feeding behaviour influences slaughter weight in rabbits. Livest Sci 2016. [DOI: 10.1016/j.livsci.2015.12.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Rabbit dietary supplementation with pale purple coneflower. 2. Effects on the performances, bacterial community, blood parameters and immunity of growing rabbits. Animal 2016; 10:1110-7. [PMID: 26763832 DOI: 10.1017/s1751731115002980] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Echinacea pallida (EPAL), a herbaceous flowering plant with immunomodulatory properties, has been chosen to determine the pre- and post-supplementary effects on the growth performances, bacterial community, blood parameters and immunity of growing rabbits. The same Grimaud does (14-week-old) from the studied in the first part of this study were randomly divided into two groups (n=50/group). The first group was fed a basal diet without supplementation (Control group, C) while the another group was fed a basal diet supplemented with 3 g EPAL/kg diet (Echinacea group, E). From the second parturition, 80 weaned kits (40 from the C does and 40 from the E does) were randomly assigned to four groups of 20 animals each and were fed a growing commercial diet supplemented with or without a 3 g EPAL/kg diet: the CC group (rabbits from the C does fed the control diet), CE group (rabbits from the C does fed the supplemented diet), EC (rabbits from the E does fed the control diet) and EE group (rabbits from the E does fed the supplemented diet). The dietary EPAL treatment did not affect the growth performance. Ten fattening rabbits from each group were selected to evaluate the bacterial community and blood parameters, while the remaining rabbits (n=10/group) were used to study phagocytosis and the humoral immune response. The variability was evaluated from hard faeces at 35, 49 and 89 days, and the caecal content at 89 days. The variability of the bacterial community of the EE group was higher than that of the other groups. The phagocytic activity was higher in the CE and EE groups than in the CC and EC ones (30.9 and 29.7 v. 21.2 and 21.8%; P<0.05), whereas no statistically significant difference was observed for the blood parameters or humoral immune response against vaccination (rabbit haemorrhagic disease virus) at 95 days old which the serum was collected at 88, 102, 109, 116 and 123 days old. In conclusion, no impact of EPAL dietary supplementation has been observed on the growth performances, bacterial community, blood parameters or humoral immune responses in growing rabbits, except for an increase in phagocytic activities.
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Effect of purple loosestrife (Lythrum salicaria) diet supplementation in rabbit nutrition on performance, digestibility, health and meat quality. Animal 2016; 10:10-8. [DOI: 10.1017/s1751731115001822] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Molette C, Gilbert H, Larzul C, Balmisse E, Ruesche J, Manse H, Tircazes A, Theau-Clément M, Joly T, Gidenne T, Garreau H, Drouilhet L. Direct and correlated responses to selection in two lines of rabbits selected for feed efficiency under ad libitum and restricted feeding: II. Carcass and meat quality1. J Anim Sci 2016; 94:49-57. [DOI: 10.2527/jas.2015-9403] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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The effect of 1-week feed restriction on performance, digestibility of nutrients and digestive system development in the growing rabbit. Animal 2016; 10:1-9. [DOI: 10.1017/s1751731115001810] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Uhlířová L, Volek Z, Marounek M, Tůmová E. Effect of feed restriction and different crude protein sources on the performance, health status and carcass traits of growing rabbits. WORLD RABBIT SCIENCE 2015. [DOI: 10.4995/wrs.2015.3229] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
<p>We evaluate the effect of the crude protein source (CP) in combination with 2 feeding strategies (AL: ad libitum or R: restricted) on the performance, health status and carcass traits of growing-fattening rabbits (between 33 and 75 d of age). Two experimental diets were formulated; the first containing soybean meal (SBM: 70 g/kg) as the main CP source and the second containing white lupin seeds (WLS: 105 g/kg) as the main CP source. A total of 160 weaned Hyplus rabbits (774±10 g live weight) were randomly allocated to the experimental groups, combination of feeding strategy and diet (AL SBM, R SBM, AL WLS and R WLS; 40 rabbits per group with 4 rabbits per cage), for 42 d. The feeding programme was applied as follows: both the AL SBM and AL WLS rabbits were fed ad libitum for the entire fattening period, whereas the R SBM and R WLS rabbits were subjected to feed restriction between 33 and 47 d of age (75% of the ad libitum intake). Afterwards, all restricted rabbits were fed ad libitum until 75 d of age. Regardless of the CP source, the feed restriction reduced the final live weight by 83 g, chilled carcass weight by 65 g, and dressing out percentage by 0.9 percentage points (P<0.05). There was a higher chilled carcass weight (+114 g; P=0.001) and reference carcass weight (+91 g; P=0.001) in rabbits fed with WLS diet than in rabbits fed with SBM diet. No dead or morbid rabbits were observed in restricted rabbits during the restriction period. There was no effect of the diet on the health of rabbits. However when the rabbits of AL SBM and AL WLS group were compared did we observe a lower number of rabbits at sanitary risk in AL WLS group (2 vs. 12 rabbits, P=0.006). In conclusion, the growth performance was not affected by the crude protein source, and no interaction between dietary CP source and feeding regime was observed. Feed restriction regime did not improve sanitary risk index throughout the entire period.</p>
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Read T, Combes S, Gidenne T, Destombes N, Grenet L, Fortun-Lamothe L. Stimulate feed intake before weaning and control intake after weaning to optimise health and growth performance. WORLD RABBIT SCIENCE 2015. [DOI: 10.4995/wrs.2015.3977] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
<p>Post-weaning feed restriction is a common practice in rabbit farming to reduce mortality, but results in lower growth performance and slaughter weights. This study aimed to assess the influence of 2 diets both rich in fibre and low in starch, with high or low digestible energy (DE) and digestible protein (DP) contents for a constant DP/DE ratio offered from 18 to 70 d of age, on the growth performance and health parameters of rabbits. Eight hundred rabbit kits were divided in 2 experimental groups differing in the feed offered from 18 to 70 d: a high concentrate diet (HC group; 10.37 MJ DE/kg DM and 102 g DP/kg DM) or low concentrate diet (LC group; 9.63 MJ DE/kg DM and 95 g DP/kg DM). Feed was offered ad libitum before weaning (35 d) and from 63 to 70 d, while feed offered from 35 to 63 d was controlled to obtain similar DE intake in both groups. Feed intake, animal weights and health status were recorded weekly. Mortality was recorded daily. Feed intake was similar in both groups before weaning (P=0.204), and consequently the DE intake was higher in the HC group compared to the LC group before weaning (3.91 vs. 3.39 MJ, respectively; P=0.017). Feed intake from 63 to 70 d was lower in the HC than in the LC group (229 vs. 239 g/d/kit, respectively; P<0.001).<br />Total DE ingested after weaning was similar in both groups (45.44 MJ; P=0.143). Kits were heavier in the HC group throughout the study (P<0.05). A higher average daily gain during the periods of 18-28, 35-42 and 56-63 d was seen in the HC group (+8.1%, +16.8% and +4.5%, respectively; P<0.05). Mortality and morbidity rates were similar between groups throughout the study (P=1.0 and P=0.104, respectively). Our results suggest that when the feed intake after weaning is controlled, i) the feeding strategy before weaning determines the weight at weaning and at slaughter age; and ii) rabbits fed a diet more highly concentrated but rich in fibre increase their growth performance without negative consequences on their digestive health.</p>
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