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Performance of calves born in different periods of the calving season in intensive beef cattle farming
ABSTRACT The objective of this study was to evaluate, for two years, the performance of 124 female and 105 male Braford calves born during the first and second halves of the same calving season and the effects of birth period on the development of males until slaughter, as yearlings, and of females...
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| Published in: | Arquivo brasileiro de medicina veterinária e zootecnia 2020-09, Vol.72 (5), p.1874-1880 |
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| creator | Vaz, R.Z. Lobato, J.F.P. Restle, J. Conceição, V.G.D. Ferreira, O.G.L. Costa, J.L.B. Eloy, L.R. |
| description | ABSTRACT The objective of this study was to evaluate, for two years, the performance of 124 female and 105 male Braford calves born during the first and second halves of the same calving season and the effects of birth period on the development of males until slaughter, as yearlings, and of females until calving, after having mated at 13-15 months of age. Early-born females were heavier than those born late at weaning (119.3 vs 109.9kg; P |
| doi_str_mv | 10.1590/1678-4162-11883 |
| format | article |
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RESUMO O objetivo deste estudo foi avaliar, por dois anos, o desempenho de 124 bezerras e 105 bezerros Braford nascidos durante a primeira e segunda metades da mesma estação, bem como os efeitos do período de nascimento no desenvolvimento dos machos até o abate e das fêmeas até o primeiro parto, após serem acasalados entre 13/15 meses de idade. As fêmeas nascidas precocemente foram mais pesadas do que as nascidas tardiamente ao desmame quando bezerras (119,3 vs. 109,9kg; P<0,05), no início da estação reprodutiva (275,0 vs. 263,0kg; P<0,05) e no final da estação reprodutiva (300,0 vs. 289,5kg; P<0,05), além de terem maior fertilidade (taxa de prenhez 70 vs. 50%). Não houve diferença (P>0,05) no desenvolvimento de bezerros nascidos precocemente em relação aos nascidos mais tardiamente, exceto no peso ao desmame, com superioridade dos primeiros. Os novilhos nascidos mais cedo ficaram prontos para o abate à idade mais jovem (459,6 vs. 490,1 dias; P<0,05), e ambos os grupos (nascidos precoce e tardiamente) tinham uma condição corporal classificada como gordura (4,21 pontos). Em sistemas de produção intensiva, os bezerros machos e fêmeas nascidos precocemente, na primeira metade da estação de parição, possuem melhor desempenho.]]></description><identifier>ISSN: 0102-0935</identifier><identifier>ISSN: 1678-4162</identifier><identifier>EISSN: 1678-4162</identifier><identifier>DOI: 10.1590/1678-4162-11883</identifier><language>eng</language><publisher>Universidade Federal de Minas Gerais, Escola de Veterinária</publisher><subject>body condition ; development ; finishing males ; reproduction ; VETERINARY SCIENCES</subject><ispartof>Arquivo brasileiro de medicina veterinária e zootecnia, 2020-09, Vol.72 (5), p.1874-1880</ispartof><rights>This work is licensed under a Creative Commons Attribution 4.0 International License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c387t-a69efcaf805f3a5739755115c7234e257983fec6cfb6c6002af3a732f65a2b2a3</citedby><cites>FETCH-LOGICAL-c387t-a69efcaf805f3a5739755115c7234e257983fec6cfb6c6002af3a732f65a2b2a3</cites><orcidid>0000-0003-0302-8482 ; 0000-0003-4505-1277 ; 0000-0002-8150-9137 ; 0000-0003-1328-9387 ; 0000-0002-5948-4447 ; 0000-0002-6103-4074 ; 0000-0002-5584-6498</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,780,784,885,24150,27924,27925</link.rule.ids></links><search><creatorcontrib>Vaz, R.Z.</creatorcontrib><creatorcontrib>Lobato, J.F.P.</creatorcontrib><creatorcontrib>Restle, J.</creatorcontrib><creatorcontrib>Conceição, V.G.D.</creatorcontrib><creatorcontrib>Ferreira, O.G.L.</creatorcontrib><creatorcontrib>Costa, J.L.B.</creatorcontrib><creatorcontrib>Eloy, L.R.</creatorcontrib><title>Performance of calves born in different periods of the calving season in intensive beef cattle farming</title><title>Arquivo brasileiro de medicina veterinária e zootecnia</title><addtitle>Arq. Bras. Med. Vet. Zootec</addtitle><description><![CDATA[ABSTRACT The objective of this study was to evaluate, for two years, the performance of 124 female and 105 male Braford calves born during the first and second halves of the same calving season and the effects of birth period on the development of males until slaughter, as yearlings, and of females until calving, after having mated at 13-15 months of age. Early-born females were heavier than those born late at weaning (119.3 vs 109.9kg; P<0.05), at the start of the breeding season (275.0 vs 263.0kg; P<0.05), and at the end of the breeding season (300.0 vs 289.5kg; P<0.05), in addition to being more fertile (70 vs 50% pregnancy rate). There was no difference (P>0.05) in the development of males born early in relation to those born late, except for weaning weight, which was higher in the former. Steers born early were ready for slaughter at a younger age (459.6 vs 490.1 days; P<0.05), and both groups (early- and late-born) had a body condition classified as fat (4.21 points). In intensive production systems, both male and female calves perform better if they are born during the first half of the calving season.
RESUMO O objetivo deste estudo foi avaliar, por dois anos, o desempenho de 124 bezerras e 105 bezerros Braford nascidos durante a primeira e segunda metades da mesma estação, bem como os efeitos do período de nascimento no desenvolvimento dos machos até o abate e das fêmeas até o primeiro parto, após serem acasalados entre 13/15 meses de idade. As fêmeas nascidas precocemente foram mais pesadas do que as nascidas tardiamente ao desmame quando bezerras (119,3 vs. 109,9kg; P<0,05), no início da estação reprodutiva (275,0 vs. 263,0kg; P<0,05) e no final da estação reprodutiva (300,0 vs. 289,5kg; P<0,05), além de terem maior fertilidade (taxa de prenhez 70 vs. 50%). Não houve diferença (P>0,05) no desenvolvimento de bezerros nascidos precocemente em relação aos nascidos mais tardiamente, exceto no peso ao desmame, com superioridade dos primeiros. Os novilhos nascidos mais cedo ficaram prontos para o abate à idade mais jovem (459,6 vs. 490,1 dias; P<0,05), e ambos os grupos (nascidos precoce e tardiamente) tinham uma condição corporal classificada como gordura (4,21 pontos). Em sistemas de produção intensiva, os bezerros machos e fêmeas nascidos precocemente, na primeira metade da estação de parição, possuem melhor desempenho.]]></description><subject>body condition</subject><subject>development</subject><subject>finishing males</subject><subject>reproduction</subject><subject>VETERINARY SCIENCES</subject><issn>0102-0935</issn><issn>1678-4162</issn><issn>1678-4162</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>DOA</sourceid><recordid>eNo9kVtLAzEQhYMoWKvPvuYPbJvLJtl9lOKlICiozyGbndSUbVKSteC_N9tK5yUwfHPmZA5C95QsqGjJkkrVVDWVrKK0afgFmp07l2hGKGEVabm4Rjc5bwlhddvSGXLvkFxMOxMs4OiwNcMBMu5iCtgH3HvnIEEY8R6Sj32emPEbjpwPG5zB5HhEfRghZH8A3AFMQuM4AHYm7Qp3i66cGTLc_b9z9PX0-Ll6qV7fnterh9fK8kaNlZEtOGtcQ4TjRijeKiEoFVYxXgMTqm24Ayut66SV5ROmYIozJ4VhHTN8jtYn3T6ard4nvzPpV0fj9bER00abNHo7gOZ17ygIIYwSdXHcUgmilorVfc_LtqK1OGll62GIeht_Uijm9cd0TD0dkxFGSglCG1WXgeVpwKaYcwJ3NkCJnjLSUyJ6SkQfM-J_JCCB2w</recordid><startdate>20200901</startdate><enddate>20200901</enddate><creator>Vaz, R.Z.</creator><creator>Lobato, J.F.P.</creator><creator>Restle, J.</creator><creator>Conceição, V.G.D.</creator><creator>Ferreira, O.G.L.</creator><creator>Costa, J.L.B.</creator><creator>Eloy, L.R.</creator><general>Universidade Federal de Minas Gerais, Escola de Veterinária</general><general>Universidade Federal de Minas Gerais</general><scope>AAYXX</scope><scope>CITATION</scope><scope>GPN</scope><scope>DOA</scope><orcidid>https://orcid.org/0000-0003-0302-8482</orcidid><orcidid>https://orcid.org/0000-0003-4505-1277</orcidid><orcidid>https://orcid.org/0000-0002-8150-9137</orcidid><orcidid>https://orcid.org/0000-0003-1328-9387</orcidid><orcidid>https://orcid.org/0000-0002-5948-4447</orcidid><orcidid>https://orcid.org/0000-0002-6103-4074</orcidid><orcidid>https://orcid.org/0000-0002-5584-6498</orcidid></search><sort><creationdate>20200901</creationdate><title>Performance of calves born in different periods of the calving season in intensive beef cattle farming</title><author>Vaz, R.Z. ; Lobato, J.F.P. ; Restle, J. ; Conceição, V.G.D. ; Ferreira, O.G.L. ; Costa, J.L.B. ; Eloy, L.R.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c387t-a69efcaf805f3a5739755115c7234e257983fec6cfb6c6002af3a732f65a2b2a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>body condition</topic><topic>development</topic><topic>finishing males</topic><topic>reproduction</topic><topic>VETERINARY SCIENCES</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Vaz, R.Z.</creatorcontrib><creatorcontrib>Lobato, J.F.P.</creatorcontrib><creatorcontrib>Restle, J.</creatorcontrib><creatorcontrib>Conceição, V.G.D.</creatorcontrib><creatorcontrib>Ferreira, O.G.L.</creatorcontrib><creatorcontrib>Costa, J.L.B.</creatorcontrib><creatorcontrib>Eloy, L.R.</creatorcontrib><collection>CrossRef</collection><collection>SciELO</collection><collection>DOAJ Directory of Open Access Journals</collection><jtitle>Arquivo brasileiro de medicina veterinária e zootecnia</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Vaz, R.Z.</au><au>Lobato, J.F.P.</au><au>Restle, J.</au><au>Conceição, V.G.D.</au><au>Ferreira, O.G.L.</au><au>Costa, J.L.B.</au><au>Eloy, L.R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Performance of calves born in different periods of the calving season in intensive beef cattle farming</atitle><jtitle>Arquivo brasileiro de medicina veterinária e zootecnia</jtitle><addtitle>Arq. Bras. Med. Vet. Zootec</addtitle><date>2020-09-01</date><risdate>2020</risdate><volume>72</volume><issue>5</issue><spage>1874</spage><epage>1880</epage><pages>1874-1880</pages><issn>0102-0935</issn><issn>1678-4162</issn><eissn>1678-4162</eissn><abstract><![CDATA[ABSTRACT The objective of this study was to evaluate, for two years, the performance of 124 female and 105 male Braford calves born during the first and second halves of the same calving season and the effects of birth period on the development of males until slaughter, as yearlings, and of females until calving, after having mated at 13-15 months of age. Early-born females were heavier than those born late at weaning (119.3 vs 109.9kg; P<0.05), at the start of the breeding season (275.0 vs 263.0kg; P<0.05), and at the end of the breeding season (300.0 vs 289.5kg; P<0.05), in addition to being more fertile (70 vs 50% pregnancy rate). There was no difference (P>0.05) in the development of males born early in relation to those born late, except for weaning weight, which was higher in the former. Steers born early were ready for slaughter at a younger age (459.6 vs 490.1 days; P<0.05), and both groups (early- and late-born) had a body condition classified as fat (4.21 points). In intensive production systems, both male and female calves perform better if they are born during the first half of the calving season.
RESUMO O objetivo deste estudo foi avaliar, por dois anos, o desempenho de 124 bezerras e 105 bezerros Braford nascidos durante a primeira e segunda metades da mesma estação, bem como os efeitos do período de nascimento no desenvolvimento dos machos até o abate e das fêmeas até o primeiro parto, após serem acasalados entre 13/15 meses de idade. As fêmeas nascidas precocemente foram mais pesadas do que as nascidas tardiamente ao desmame quando bezerras (119,3 vs. 109,9kg; P<0,05), no início da estação reprodutiva (275,0 vs. 263,0kg; P<0,05) e no final da estação reprodutiva (300,0 vs. 289,5kg; P<0,05), além de terem maior fertilidade (taxa de prenhez 70 vs. 50%). Não houve diferença (P>0,05) no desenvolvimento de bezerros nascidos precocemente em relação aos nascidos mais tardiamente, exceto no peso ao desmame, com superioridade dos primeiros. Os novilhos nascidos mais cedo ficaram prontos para o abate à idade mais jovem (459,6 vs. 490,1 dias; P<0,05), e ambos os grupos (nascidos precoce e tardiamente) tinham uma condição corporal classificada como gordura (4,21 pontos). Em sistemas de produção intensiva, os bezerros machos e fêmeas nascidos precocemente, na primeira metade da estação de parição, possuem melhor desempenho.]]></abstract><pub>Universidade Federal de Minas Gerais, Escola de Veterinária</pub><doi>10.1590/1678-4162-11883</doi><tpages>7</tpages><orcidid>https://orcid.org/0000-0003-0302-8482</orcidid><orcidid>https://orcid.org/0000-0003-4505-1277</orcidid><orcidid>https://orcid.org/0000-0002-8150-9137</orcidid><orcidid>https://orcid.org/0000-0003-1328-9387</orcidid><orcidid>https://orcid.org/0000-0002-5948-4447</orcidid><orcidid>https://orcid.org/0000-0002-6103-4074</orcidid><orcidid>https://orcid.org/0000-0002-5584-6498</orcidid><oa>free_for_read</oa></addata></record> |
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| source | SciELO Brazil |
| subjects | body condition development finishing males reproduction VETERINARY SCIENCES |
| title | Performance of calves born in different periods of the calving season in intensive beef cattle farming |
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