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Hamed AMAE, Kamel ER. Effect of some non-genetic factors on the productivity and profitability of Holstein Friesian dairy cows. Vet World 2021; 14:242-249. [PMID: 33642810 PMCID: PMC7896893 DOI: 10.14202/vetworld.2021.242-249] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Accepted: 12/21/2020] [Indexed: 11/16/2022] Open
Abstract
Background and Aim: Milk yield (MY) is one of the main factors that affect the economic profitability of dairy farms. Thus, increasing the MY per animal and decreasing the feed cost can lead to economic gains, so the objective of this study was to evaluate the effect of dry period length (DPL), days open (DO), and days in milk (DIM) on the productivity and profitability of dairy cow farms. Materials and Methods: Data used in this study were taken from 3095 lactation records of Friesian dairy cows of private and governmental sectors. The data were classified into 4 DPL categories: DPL1 <45 days; DPL2 45-60 days; DPL3 61-75 days, and DPL4 >75 days, 3 DO categories: DO1 ≤90 days; DO2 91-110 days and DO3 >111 days, and 8 DIM categories: DIM1 180-210 days; DIM2 211-240 days; DIM3 241-270 days; DIM4 271-300 days; DIM5 301-330 days; DIM6 331-360 days; DIM7 361-447 days; and DIM8 >447 days. Results: The average net profit (NP) was significantly different (p<0.05) among different categories of DPL, DO, and DIM in both production sectors, where high estimates of NP were calculated for DPL3 (30667.3 EGP), and it was the lowest for DPL1 (19690.6 EGP). DO2 had the highest NP (30754.1 EGP), while DO3 had the lowest NP (24875.5 EGP). DIM3 had the highest NP (29569.3 EGP), while DIM8 had the lowest NP (19528.4 EGP). Conclusion: Finally, we can conclude that DPL 61-75 days, DO 91-110 days, and DIM 241-270 days had the highest level of total MY, total return, and NP. Private dairy cow farms achieve a higher level of NP than governmental ones under subtropical Egyptian conditions.
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Affiliation(s)
- Amira M Abd-El Hamed
- Economics and Farm Management, Department of Animal Wealth Development, Faculty of Veterinary Medicine, Benha University, Moshtohor, Toukh 13736, Qalyubia, Egypt
| | - Eman R Kamel
- Economics and Farm Management, Department of Animal Wealth Development, Faculty of Veterinary Medicine, Benha University, Moshtohor, Toukh 13736, Qalyubia, Egypt
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2
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Andrée O'Hara E, Holtenius K, Båge R, von Brömssen C, Emanuelson U. An observational study of the dry period length and its relation to milk yield, health, and fertility in two dairy cow breeds. Prev Vet Med 2019; 175:104876. [PMID: 31918356 DOI: 10.1016/j.prevetmed.2019.104876] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 12/18/2019] [Accepted: 12/18/2019] [Indexed: 11/25/2022]
Abstract
This study evaluated associations between dry period length (DPL) in dairy cows and energy-corrected milk (ECM) production, health, and fertility, using a dataset involving 78 577 lactations in cows of two breeds, Swedish Red (SR) and Swedish Holstein (SH). Herds with at least 20 cows and at least 20 % purebred SR and at least 20 % SH during the year 2015/2016 were included in the dataset. Cows were divided into parity groups 2 and 3 or older and DPL was classified into six 10-day groups (30-39 to 80-89 d). Associations between DPL and the outcome variables were assessed with linear and generalized linear mixed models. Production of ECM at the first three test milkings and the 305-d lactation was highest in the 50-59 d and 60-69 d DPL groups, and lowest in the 30-39 d and 80-89 d groups (p < 0.001). Mastitis and somatic cell count (SCC) did not differ between DPL groups, except at the third test milking, where cows in the 40-49, 50-59, and 60-69 DPL groups had lower SCC (p < 0.001) than cows in the 70-79 and 80-89 d groups. The odds ratio (OR) for retained placenta was 1.9 for cows with 30-39 d DPL relative to cows with 60-69 d DPL. Cows in DPL groups 40-49 d and 50-59 ha d the lowest odds of culling (OR=0.89 and 0.92). The OR for culling in cows with DPL 70-79 d and 80-89 was 1.2 and 1.4, respectively, relative to cows with 60-69 d DPL. The conception rate at first insemination did not among between DPL groups. The SR cows produced less ECM than the SH cows, but had lower SCC and lower OR for mastitis, retained placenta, puerperal paresis, and culling within 90 DIM. Although DPL <40 days or>80 days reduced milk production in early lactation and the 305-d lactation, the estimated additional milk production in the preceding lactation in cows with short DPL compensated for this reduction. A DPL of 40 days did not affect health and fertility in comparison with a conventional 60 d DPL, while a DPL of >70 d was unfavorable due to low milk production, increased risk of culling, and decreased fertility. The response to DPL was not affected by breed or parity.
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Affiliation(s)
- Elisabeth Andrée O'Hara
- Department of Animal Nutrition and Management, Swedish University of Agricultural Sciences, POB 7024, 75007, Uppsala, Sweden.
| | - Kjell Holtenius
- Department of Animal Nutrition and Management, Swedish University of Agricultural Sciences, POB 7024, 75007, Uppsala, Sweden.
| | - Renée Båge
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, PO Box 7054, 75007, Uppsala, Sweden.
| | - Claudia von Brömssen
- Department of Energy and Technology, Swedish University of Agricultural Sciences, PO Box 7032, 75007 Uppsala, Sweden.
| | - Ulf Emanuelson
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, PO Box 7054, 75007, Uppsala, Sweden.
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El-Tarabany MS, AL-Marakby KM. Effect of synchronization protocols on reproductive indices, progesterone profile and fertility under subtropical environmental conditions in repeat breeder Holstein cows. Reprod Domest Anim 2018; 54:234-242. [DOI: 10.1111/rda.13342] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 09/07/2018] [Indexed: 11/26/2022]
Affiliation(s)
- Mahmoud S. El-Tarabany
- Department of Animal Wealth Development, Faculty of Veterinary Medicine; Zagazig University; Sharkia Egypt
| | - Khaled M. AL-Marakby
- Department of Animal production, Faculty of Agriculture; Zagaig University; Sharkia Egypt
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4
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El-Tarabany MS. Survival analysis and seasonal patterns of pregnancy outcomes in Egyptian buffaloes. Livest Sci 2018. [DOI: 10.1016/j.livsci.2018.05.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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5
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Puppel K, Bogusz E, Gołębiewski M, Nałęcz-Tarwacka T, Kuczyńska B, Slósarz J, Budziński A, Solarczyk P, Kunowska-Slósarz M, Przysucha T. Effect of Dairy Cow Crossbreeding on Selected Performance Traits and Quality of Milk in First Generation Crossbreds. J Food Sci 2017; 83:229-236. [DOI: 10.1111/1750-3841.13988] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Revised: 09/06/2017] [Accepted: 10/16/2017] [Indexed: 11/28/2022]
Affiliation(s)
- Kamila Puppel
- Cattle Breeding Div., Animal Breeding and Production Dept.; Warsaw Univ. of Life Sciences; Warsaw Poland
| | - Ewa Bogusz
- Cattle Breeding Div., Animal Breeding and Production Dept.; Warsaw Univ. of Life Sciences; Warsaw Poland
| | - Marcin Gołębiewski
- Cattle Breeding Div., Animal Breeding and Production Dept.; Warsaw Univ. of Life Sciences; Warsaw Poland
| | - Teresa Nałęcz-Tarwacka
- Cattle Breeding Div., Animal Breeding and Production Dept.; Warsaw Univ. of Life Sciences; Warsaw Poland
| | - Beata Kuczyńska
- Cattle Breeding Div., Animal Breeding and Production Dept.; Warsaw Univ. of Life Sciences; Warsaw Poland
| | - Jan Slósarz
- Cattle Breeding Div., Animal Breeding and Production Dept.; Warsaw Univ. of Life Sciences; Warsaw Poland
| | - Arkadiusz Budziński
- Cattle Breeding Div., Animal Breeding and Production Dept.; Warsaw Univ. of Life Sciences; Warsaw Poland
| | - Paweł Solarczyk
- Cattle Breeding Div., Animal Breeding and Production Dept.; Warsaw Univ. of Life Sciences; Warsaw Poland
| | | | - Tomasz Przysucha
- Cattle Breeding Div., Animal Breeding and Production Dept.; Warsaw Univ. of Life Sciences; Warsaw Poland
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6
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Abo-Ismail MK, Brito LF, Miller SP, Sargolzaei M, Grossi DA, Moore SS, Plastow G, Stothard P, Nayeri S, Schenkel FS. Genome-wide association studies and genomic prediction of breeding values for calving performance and body conformation traits in Holstein cattle. Genet Sel Evol 2017; 49:82. [PMID: 29115939 PMCID: PMC6389134 DOI: 10.1186/s12711-017-0356-8] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Accepted: 10/23/2017] [Indexed: 11/23/2022] Open
Abstract
Background Our aim was to identify genomic regions via genome-wide association studies (GWAS) to improve the predictability of genetic merit in Holsteins for 10 calving and 28 body conformation traits. Animals were genotyped using the Illumina Bovine 50 K BeadChip and imputed to the Illumina BovineHD BeadChip (HD). GWAS were performed on 601,717 real and imputed single nucleotide polymorphism (SNP) genotypes using a single-SNP mixed linear model on 4841 Holstein bulls with breeding value predictions and followed by gene identification and in silico functional analyses. The association results were further validated using five scenarios with different numbers of SNPs. Results Seven hundred and eighty-two SNPs were significantly associated with calving performance at a genome-wise false discovery rate (FDR) of 5%. Most of these significant SNPs were on chromosomes 18 (71.9%), 17 (7.4%), 5 (6.8%) and 7 (2.4%) and mapped to 675 genes, among which 142 included at least one significant SNP and 532 were nearby one (100 kbp). For body conformation traits, 607 SNPs were significant at a genome-wise FDR of 5% and most of them were located on chromosomes 5 (30%), 18 (27%), 20 (13%), 6 (6%), 7 (5%), 14 (5%) and 13 (3%). SNP enrichment functional analyses for calving traits at a FDR of 1% suggested potential biological processes including musculoskeletal movement, meiotic cell cycle, oocyte maturation and skeletal muscle contraction. Furthermore, pathway analyses suggested potential pathways associated with calving performance traits including tight junction, oxytocin signaling, and MAPK signaling (P < 0.10). The prediction ability of the 1206 significant SNPs was between 78 and 83% of the prediction ability of the BovineSNP50 SNPs for calving performance traits and between 35 and 79% for body conformation traits. Conclusions Various SNPs that are significantly associated with calving performance are located within or nearby genes with potential roles in tight junction, oxytocin signaling, and MAPK signaling. Combining the significant SNPs or SNPs within or nearby gene(s) from the HD panel with the BovineSNP50 panel yielded a marginal increase in the accuracy of prediction of genomic estimated breeding values for all traits compared to the use of the BovineSNP50 panel alone. Electronic supplementary material The online version of this article (10.1186/s12711-017-0356-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Mohammed K Abo-Ismail
- Department of Animal Biosciences, Centre for Genetic Improvement of Livestock, University of Guelph, Guelph, ON, Canada.,Department of Animal and Poultry Production, Damanhour University, Damanhour, Egypt
| | - Luiz F Brito
- Department of Animal Biosciences, Centre for Genetic Improvement of Livestock, University of Guelph, Guelph, ON, Canada
| | - Stephen P Miller
- Department of Animal Biosciences, Centre for Genetic Improvement of Livestock, University of Guelph, Guelph, ON, Canada.,The Angus Genetics Inc, Saint Joseph, MO, USA
| | - Mehdi Sargolzaei
- Department of Animal Biosciences, Centre for Genetic Improvement of Livestock, University of Guelph, Guelph, ON, Canada.,The Semex Alliance, Guelph, ON, Canada
| | - Daniela A Grossi
- Department of Animal Biosciences, Centre for Genetic Improvement of Livestock, University of Guelph, Guelph, ON, Canada
| | | | | | | | | | - Flavio S Schenkel
- Department of Animal Biosciences, Centre for Genetic Improvement of Livestock, University of Guelph, Guelph, ON, Canada.
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El-Tarabany MS. Impact of days in milk at the initiation of ovulation synchronization protocols on the efficiency of first AI in multiparous Holstein cows. Anim Reprod Sci 2017; 182:104-110. [DOI: 10.1016/j.anireprosci.2017.05.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 05/06/2017] [Accepted: 05/14/2017] [Indexed: 11/16/2022]
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Hassan FAM, Ali MA, El-Tarabany MS. Economic impacts of calving season and parity on reproduction and production traits of buffaloes in the sub-tropics. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:10258-10266. [PMID: 28265877 DOI: 10.1007/s11356-017-8686-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 02/22/2017] [Indexed: 06/06/2023]
Abstract
In order to enhance the profitability of dairy buffaloes, it is necessary to develop an understanding of the factors affecting their reproduction and milk production ability. Thus, the objective of this study was to elucidate the economic impacts of calving season and parity on reproduction and production indices of Egyptian dairy buffaloes (1180) reared under subtropical environmental conditions. Buffaloes calving in the autumn season had lesser days open, calving interval, and service per conception (108.25 days, 414.16 days, and 1.67, respectively), while spring calvers showed the greater calculations (210.27 days, 522.82 days, and 2.39, respectively). The buffaloes calving for the first time had the longest days open, calving interval, and number of services per conception among different parities (176.21 days, 490.05 days, and 2.18, respectively), then decreased thereafter. Furthermore, buffaloes calving in the winter season had the significantly highest total milk yield, milk revenue, total revenue, profit, and profit/cost ratio (1981.4 kg, 1769.1 $, 2019.5 $, 662.9 $, and 0.49, respectively) in comparison with other seasons. The total milk yield, lactation period, profit, and profit/cost ratio were increased to reach the peak values in the fourth parity (2051.5 kg, 252.44 days, 674.8 $, and 0.48, respectively), then decreased thereafter. In conclusion, buffaloes at the fourth parity and those calving in the winter season had the best milk yield, milk revenue, total revenue, and profit/cost ratio. Therefore, breeders must pay more attention to calving season and parity as they play an important role in the farm profitability and productivity and should counteract the adverse effects of periodical and seasonal changes. It is recommended to make estrus synchronization for more calvings in the winter season. Finally, choose the best lifetime for keeping the animal in production.
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Affiliation(s)
- Fardos A M Hassan
- Department of Animal Wealth Development, Faculty of Veterinary Medicine, Zagazig University, El-Zeraa str. 114, Zagazig, Sharkia, 44511, Egypt
| | - Mohamed A Ali
- Department of Animal Wealth Development, Faculty of Veterinary Medicine, Zagazig University, El-Zeraa str. 114, Zagazig, Sharkia, 44511, Egypt
| | - Mahmoud S El-Tarabany
- Department of Animal Wealth Development, Faculty of Veterinary Medicine, Zagazig University, El-Zeraa str. 114, Zagazig, Sharkia, 44511, Egypt.
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9
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El-Tarabany MS, El-Tarabany AA, Roushdy EM. Impact of parity on the efficiency of ovulation synchronization protocols in Holstein cows. Theriogenology 2016; 86:2230-2237. [PMID: 27561980 DOI: 10.1016/j.theriogenology.2016.07.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Revised: 07/12/2016] [Accepted: 07/15/2016] [Indexed: 11/24/2022]
Abstract
The objective of this study was to elucidate the impact of parity on the efficiency of three different protocols to synchronize time of ovulation in Holstein cows. All cows enrolled in this trial were categorized into primiparous and multiparous (M1 = 2-3 and M2 ≥3 parities). Conception (P/AI at Day 28) and pregnancy (P/AI at Day 75) rates in the Presynch and CIDRsynch (31.7% and 35.5%; 26.3% and 28.4%, respectively) groups were significantly greater than that in spontaneous estrus (SE; 24.7 and 20.4%, respectively) group (P = 0.048 and 0.024; 0.041 and 0.011, respectively); however, no significant differences were detected between the SE and Ovsynch group for conception, pregnancy, and embryonic loss rates. Conception and pregnancy rates in the Presynch group decreased from 37.8% and 33.5%, respectively in primiparous cows to 29.6% and 23.1%, respectively in M1 cows (P = 0.022 and 0.007, respectively). However, conception and pregnancy rates using the CIDRsynch regimen were increased from 31.1% and 23.8% in primiparous cows to 41.4% and 34.7% in M1 cows (P = 0.017 and 0.008, respectively), and 40.9% and 33.6% in M2 cows (P = 0.021 and 0.019, respectively). Embryonic loss rate using the CIDRsynch protocol was decreased from 22.9% in primiparous cows to 15.1% and 18.2% in M1 and M2 cows (P = 0.013 and 0.130, respectively). On the contrary, embryonic loss rate using the Ovsynch protocol was increased from 11.5% in primiparous cows to 22.1% and 21.8% in M1 and M2 cows (P = 0.001 and 0.003, respectively). The Cox proportional-hazards model of embryonic loss showed significant associations for parity and season of calving with the hazard of embryonic loss (P = 0.001 and 0.016, respectively). Multiparous cows (M1 and M2) had a higher risk of embryonic loss than primiparous cows (Hazard ratio = 1.32 and 1.89, respectively). Our results indicate that use of the CIDRsynch regimen may achieve satisfactory conception and pregnancy rates in multiparous Holstein cows. However, synchronizing time of ovulation in primiparous cows with use of the Presynch treatment increases the fertility indices.
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Affiliation(s)
- Mahmoud S El-Tarabany
- Department of Animal Wealth Development, Faculty of Veterinary Medicine, Zagazig University, Sharkia, Egypt.
| | - Akram A El-Tarabany
- Biological Applications Department, Radioisotopes Applications Division, NRC, Atomic Energy Authority, Cairo, Egypt
| | - Elshimaa M Roushdy
- Department of Animal Wealth Development, Faculty of Veterinary Medicine, Zagazig University, Sharkia, Egypt
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10
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El-Tarabany MS. The efficiency of new CIDR and once-used CIDR to synchronize ovulation in primiparous and multiparous Holstein cows. Anim Reprod Sci 2016; 173:29-34. [DOI: 10.1016/j.anireprosci.2016.08.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 08/10/2016] [Accepted: 08/12/2016] [Indexed: 11/28/2022]
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11
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El-Tarabany MS. Effects of calving difficulty on the subsequent reproductive performance and milk production of Holstein, Brown Swiss and their crosses. Livest Sci 2015. [DOI: 10.1016/j.livsci.2015.08.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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12
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Zobel G, Weary DM, Leslie KE, von Keyserlingk MAG. Invited review: Cessation of lactation: Effects on animal welfare. J Dairy Sci 2015; 98:8263-77. [PMID: 26409963 DOI: 10.3168/jds.2015-9617] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 08/08/2015] [Indexed: 01/09/2023]
Abstract
The forced cessation of milk production, or dry-off, is a routine management practice in dairy cattle, sheep, and goats. This practice initiates a dry period, during which the animal is not milked. Milking begins again after parturition. Most of the literature on the dry period has focused on how various drying-off strategies affect milk production and disease; little work to date has addressed how dry-off affects the overall welfare of the dairy animal. The first aim of this review was to present an overview of the importance of dry-off and how it is commonly achieved. Our review shows that much scientific progress has been made in improving health status between lactations. The second aim was to identify important gaps in the literature, of which 2 key research disparities have been identified. We find that much of the work to date has focused on cattle and very little research has examined dry-off in dairy sheep and goats. We also find a lack of research addressing how common dry-off methodologies affect animal welfare on more than just a biological level, regardless of species.
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Affiliation(s)
- G Zobel
- Animal Welfare Program, Faculty of Land and Food Systems, University of British Columbia, 2357 Main Mall, Vancouver, British Columbia, V6T 1Z4, Canada
| | - D M Weary
- Animal Welfare Program, Faculty of Land and Food Systems, University of British Columbia, 2357 Main Mall, Vancouver, British Columbia, V6T 1Z4, Canada
| | - K E Leslie
- Department of Population Medicine, University of Guelph, Stewart Building, Guelph, ON, N1G 2W1, Canada
| | - M A G von Keyserlingk
- Animal Welfare Program, Faculty of Land and Food Systems, University of British Columbia, 2357 Main Mall, Vancouver, British Columbia, V6T 1Z4, Canada.
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Impact of thermal stress on the efficiency of ovulation synchronization protocols in Holstein cows. Anim Reprod Sci 2015; 160:138-45. [PMID: 26297623 DOI: 10.1016/j.anireprosci.2015.08.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Revised: 08/03/2015] [Accepted: 08/06/2015] [Indexed: 11/23/2022]
Abstract
The objective of this study was to evaluate the impact of thermal stress on the efficiency of three different protocols to synchronize time of ovulation in purebred Holstein cows under subtropical Egyptian conditions. The influence of temperature humidity index (THI) on the conception, pregnancy, embryonic loss and early abortion rates were investigated. Conception and pregnancy rates using the CIDRsynch and Presynch (37.5% and 33.9%; 29.5 and 29. 6%, respectively) were significantly greater than that for cows expressing spontaneous estrus (SE) and with use of the Ovsynch (28.5% and 24.3%; 21.6% and 24.6%, respectively) treatment regimen. Conception and pregnancy rates using the Ovsynch protocol were significantly decreased from 31.6% and 26.3% at the lesser THI to 11.5% and 9.9%, respectively than at the greater THI [crude odds ratio (COR) = 0.28 and 0.32; P = 0.001 and 0.004, respectively]. However, conception (P/AI at 28 days) and pregnancy (P/AI at 75 days) rates using the Presynch protocol were significantly reduced at either the lesser or greater THI (COR = 0.47 and 0.42; 0.48 and 0.34, respectively). Embryonic loss rate with the Presynch group was significantly increased from 11.5% at the lesser THI to 22.2% at the greater THI (COR = 2.28; P = 0.039). In contrast, conception, pregnancy and embryonic loss rates did not differ significantly (P > 0.05) with the CIDRsynch protocol at the different THI. Results from the present study indicate that use of the CIDRsynch protocol may provide consistent and satisfactory conception and pregnancy rates in Holstein cows under subtropical environmental conditions.
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El-Tarabany MS, El-Tarabany AA. Impact of maternal heat stress at insemination on the subsequent reproductive performance of Holstein, Brown Swiss, and their crosses. Theriogenology 2015; 84:1523-9. [PMID: 26324113 DOI: 10.1016/j.theriogenology.2015.07.040] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Revised: 07/29/2015] [Accepted: 07/30/2015] [Indexed: 10/23/2022]
Abstract
Heat stress in hot environments is one of the major factors that can negatively affect milk production, reproduction, and the health of dairy cows. The aim of this study was to evaluate the impact of maternal heat stress at insemination on the subsequent reproductive performance of the pure Holstein (HO), Brown Swiss (BS), and their F1 crossbred (BF) cows, under subtropical Egyptian conditions. The influence of temperature-humidity index (THI) on the pregnancy rate, fetal loss rate, calving traits, and reproductive indices were investigated. Fetal loss rate of pure HO was significantly increased from 17.1% at low THI to 24.9% at greater THI (odds ratio = 2.09; P = 0.032). Furthermore, abortion and stillbirth rates of pure HO were significantly increased from 3.6% and 3.8%, respectively, at low THI to 7.2% and 5.9%, respectively, at greater THI (odds ratio = 2.17 and 2.58; P = 0.037 and 0.031, respectively). In contrast, BS and BF cows can tolerate the heat stress, as there were no differences in the fetal loss, abortion, and calving difficulty rates at the different levels of THI. Pure HO cows had a significant longer calving interval and days open at high THI (449 and 173 days, respectively), compared with low THI (421 and 146 days, respectively). On the contrary, BS and BF cows had no difference in the calving interval at the different levels of THI. Our results indicate that pure BS and BF cows have a better adaptability and competent reproductive performance than pure HO under subtropical conditions.
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Affiliation(s)
- Mahmoud S El-Tarabany
- Department of Animal Wealth Development, Faculty of Veterinary Medicine, Zagazig University, Sharkia, Egypt.
| | - Akram A El-Tarabany
- Biological Applications Department, Radioisotopes Applications Division, NRC, Atomic Energy Authority, Inshas, Cairo, Egypt
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15
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Impact of stillbirth and abortion on the subsequent fertility and productivity of Holstein, Brown Swiss and their crosses in subtropics. Trop Anim Health Prod 2015; 47:1351-6. [DOI: 10.1007/s11250-015-0870-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Accepted: 06/07/2015] [Indexed: 10/23/2022]
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