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de Carvalho Ribeiro AC, de Mello MRB, Barbero MMD, de Oliveira D, Couto SRBD, Barbero RP. Reproductive system morphometry and productive parameters of beef heifers according to morphological classification. Trop Anim Health Prod 2024; 56:101. [PMID: 38478351 DOI: 10.1007/s11250-024-03949-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 03/01/2024] [Indexed: 03/24/2024]
Abstract
The aim of the present study was to analyze the effects of visual morphological classification based on body structure, maturity, and musculosity on the morphometry of the reproduction system and productive parameters of beef heifers. The study was conducted for 84 days, during winter season in Brazil. Thirty non-pregnant Nellore heifers, with an average body weight 338 kg and average age 18 months, were used for the study. The heifers were housed in collective pens and fed corn silage (70%) and concentrate (30%) twice a day. All heifers were weighed weekly without prior fasting. Morphological evaluation of body structure, maturity, and musculosity was conducted in the third-middle of the experimental period by a trained evaluator, adopting a comparative methodology of visual evaluation on a scale from 1 to 6, and the heifers were classified according to the visual assessment. The effects of visual classification, time, and interactions were analyzed, considering significant effects was detected (p < 0.05). The significant (p < 0.05) results obtained were compared using Tukey test. Morphological classification did not influence the morphometry of the reproductive system or implied on time interactions. Body structure, maturity, and musculosity had no effect on dry matter intake, body weight gain, feed efficiency, and carcass dressing. However, body weight and feed efficiency were influenced by the experimental time. For both variables, significant variations were detected after 63 days of finishing in the feedlot (p < 0.001), indicating that maximum productive efficiency of feedlot-finished Nellore beef heifers was achieved at a mean body weight of 424 kg.
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Affiliation(s)
| | - Marco Roberto Bourg de Mello
- Departamento de Reprodução e Avaliação Animal, Universidade Federal Rural do Rio de Janeiro, Seropédica, 23897-000, RJ, Brazil
| | | | - Danielle de Oliveira
- Departamento de Produção Animal, Universidade Federal Rural do Rio de Janeiro, Seropédica, 23897-000, RJ, Brazil
| | - Samuel Rodrigues Bonamichi do Couto
- Post-Doctoral-Conselho Nacional de Desenvolvimento Científico e Tecnológico - Brazil, Universidade Federal Rural do Rio de Janeiro, Seropédica, 23897-000, RJ, Brazil.
| | - Rondineli Pavezzi Barbero
- Departamento de Produção Animal, Universidade Federal Rural do Rio de Janeiro, Seropédica, 23897-000, RJ, Brazil
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de Lima V, Pereira GR, da Rocha MK, de Oliveira TE, Fagundes HX, Lima JA, Barcellos JOJ. The influence of weaning age and biocholine supplementation to post-weaning growth and puberty in Brangus heifers. Res Vet Sci 2022; 152:107-114. [DOI: 10.1016/j.rvsc.2022.07.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 07/14/2022] [Accepted: 07/25/2022] [Indexed: 11/29/2022]
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Costigan H, Delaby L, Walsh S, Fitzgerald R, Kennedy E. The effect of weaning age and post-weaning feeding regime on growth and fertility of pasture-based Holstein-Friesian and Jersey dairy heifers. Livest Sci 2022. [DOI: 10.1016/j.livsci.2021.104812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Nutritional strategies for heifers under grazing system: productive and nutritional performance, metabolic profile and ovarian activity. Trop Anim Health Prod 2020; 52:1013-1022. [PMID: 31997067 DOI: 10.1007/s11250-019-02095-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 09/20/2019] [Indexed: 10/25/2022]
Abstract
The objective of this study was to evaluate the effects of nutritional strategies on productive and nutritional performance, metabolic profile, and ovarian activity in heifers under grazing in the tropics in Brazil. Forty Nellore heifers averaging 8.5 ± 0.06 months and 248.6 ± 3.3 kg body weight (BW) were distributed in a completely randomized 2 × 2 factorial design with four treatments and ten replicates. The evaluated strategies consisted of different amounts of energetic-protein supplement: (1) 4 g/kg of BW of supplement in the pre-weaning and post-weaning; (2) 4 g/kg of BW of supplement pre-weaning and 6 g/kg in the post-weaning; (3) 6 g/kg of BW of supplement in the pre-weaning and 4 g/kg of BW in the post-weaning and; (4) 6 g/kg of BW of supplement in the pre-weaning and post-weaning. Crude protein (CP) and organic matter (OM) intake were increased (P < 0.05) by increasing the amounts of supplement in the post-weaning. Additionally, increasing supplement amounts in the post-weaning increased the digestibility of OM and CP (P < 0.05). Means insulin and glucose concentrations were greater (P < 0.05) for heifers that received higher amounts of supplement in the post-weaning. Average daily gain and fat thickness in the rump were increased (P < 0.05) by increasing supplement amounts in the post-weaning. Amounts of supplement did not influence the body growth of heifers. However, follicular number, diameter, and progesterone concentration were greater (P < 0.05) for heifers that received higher amounts of supplement in the post-weaning. In summary, increasing supplement amounts in the post-weaning improve the performance, energy and metabolic status, and ovarian activity in beef heifers under grazing in the tropics. Due to higher intake of supplement, the heifers receiving 6 g/kg of BW post-weaning had greater responses, independently of the supplement amount received pre-weaning.
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Gonzalez FAL, Tarouco JU, Lobato JFP, Patino HO, Tarouco AK, Pinto LFB, Pivato M, Feijó FD. Average daily gain rates determine eye muscle area and rump fat depth of beef heifers. ITALIAN JOURNAL OF ANIMAL SCIENCE 2019. [DOI: 10.1080/1828051x.2018.1466665] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
| | | | | | - Harold Ospina Patino
- Department of Animal Science, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | | | | | - Mateus Pivato
- Department of Animal Science, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Fernanda Dornelles Feijó
- Department of Animal Science, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
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da Silva AG, Paulino MF, da Silva Amorim L, Rennó LN, Detmann E, de Moura FH, Manso MR, Silva e Paiva PH, Ortega REM, de Melo LP. Performance, endocrine, metabolic, and reproductive responses of Nellore heifers submitted to different supplementation levels pre- and post-weaning. Trop Anim Health Prod 2017; 49:707-715. [DOI: 10.1007/s11250-017-1248-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Accepted: 01/30/2017] [Indexed: 11/30/2022]
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Sartori ED, Canellas LC, Pereira GR, Moojen FG, Carvalho HR, Barcellos JOJ. Performance of beef heifers supplemented with sodium lasalocid. Trop Anim Health Prod 2016; 49:273-279. [PMID: 27957652 DOI: 10.1007/s11250-016-1188-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 11/14/2016] [Indexed: 11/28/2022]
Abstract
This study was conducted on 78 13-month-old crossbred beef heifers that weighed 215 kg in Southern Rio Grande do Sul (RS) State, Brazil. We evaluated the performance of beef heifers that were reared in a pasture system that received a mineral supplement energy-type protein with added sodium lasalocid (LAS). The heifers were randomly and uniformly divided into 2 groups, with 39 animals in each group. One group of animals received a mineral supplement energy-type protein without sodium lasalocid (CON), and the other group received a mineral supplement energy-type protein with added LAS. The mean feed intake, the body weight (BW), the average daily gain (ADG), the body condition score (BCS), and ovarian cyclicity were recorded, and economic parameters were calculated. No differences in supplement intake were observed between the groups, which ensures adequate intake of the other components of the mineral mixture, which are part of the nutritional requirements for the production process. Similarly, no difference in the ADG was observed between treatments. We observed that the heifers in the LAS group had a higher BW gain (51 kg) that the CON heifers (40 kg; P < 0.05). In addition, LAS-supplemented heifers had a higher BCS (3.53) than CON heifers (3.38) at the end of the experiment (P < 0.05). The heifers supplemented with LAS had a higher profitability than the CON heifers, even with the higher cost of the supplement containing LAS; this effect was due to the higher live BW at the end of the study. We concluded that the administration of a mineral supplement energy-type protein with added LAS has beneficial effects on beef heifers in terms of production and economic feasibility.
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Affiliation(s)
- Everton Dezordi Sartori
- Faculty of Agronomy, Department of Animal Science, Núcleo de Estudos em Sistemas de Produção de Bovinos de Corte e Cadeia Produtiva - NESPRO, Federal University of Rio Grande do Sul - UFRGS, Ave. Bento Gonçalves 7712, 91540-000, Porto Alegre, RS, Brazil
| | - Leonardo Canali Canellas
- Faculty of Agronomy, Department of Animal Science, Núcleo de Estudos em Sistemas de Produção de Bovinos de Corte e Cadeia Produtiva - NESPRO, Federal University of Rio Grande do Sul - UFRGS, Ave. Bento Gonçalves 7712, 91540-000, Porto Alegre, RS, Brazil
| | - Gabriel Ribas Pereira
- Faculty of Agronomy, Department of Animal Science, Núcleo de Estudos em Sistemas de Produção de Bovinos de Corte e Cadeia Produtiva - NESPRO, Federal University of Rio Grande do Sul - UFRGS, Ave. Bento Gonçalves 7712, 91540-000, Porto Alegre, RS, Brazil.,Center for Studies and Research in Agribusiness - CEPAN. Núcleo de Estudos em Sistemas de Produção de Bovinos de Corte e Cadeia Produtiva - NESPRO, Federal University of Rio Grande do Sul - UFRGS, Ave. Bento Gonçalves 7712, 91540-000, Porto Alegre, RS, Brazil
| | - Fernanda Gomes Moojen
- Faculty of Agronomy, Department of Animal Science, Núcleo de Estudos em Sistemas de Produção de Bovinos de Corte e Cadeia Produtiva - NESPRO, Federal University of Rio Grande do Sul - UFRGS, Ave. Bento Gonçalves 7712, 91540-000, Porto Alegre, RS, Brazil
| | - Helena Robatini Carvalho
- Faculty of Agronomy, Department of Animal Science, Núcleo de Estudos em Sistemas de Produção de Bovinos de Corte e Cadeia Produtiva - NESPRO, Federal University of Rio Grande do Sul - UFRGS, Ave. Bento Gonçalves 7712, 91540-000, Porto Alegre, RS, Brazil
| | - Júlio Otávio Jardim Barcellos
- Faculty of Agronomy, Department of Animal Science, Núcleo de Estudos em Sistemas de Produção de Bovinos de Corte e Cadeia Produtiva - NESPRO, Federal University of Rio Grande do Sul - UFRGS, Ave. Bento Gonçalves 7712, 91540-000, Porto Alegre, RS, Brazil. .,Center for Studies and Research in Agribusiness - CEPAN. Núcleo de Estudos em Sistemas de Produção de Bovinos de Corte e Cadeia Produtiva - NESPRO, Federal University of Rio Grande do Sul - UFRGS, Ave. Bento Gonçalves 7712, 91540-000, Porto Alegre, RS, Brazil. .,Federal Univesity of Rio Grande do Sul - UFRGS, Ave. Bento Gonçalves, n.: 7.712, 91540-000, Porto Alegre, RS, Brazil.
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