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Registro Completo |
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
Data corrente: |
12/04/1996 |
Data da última atualização: |
12/04/1996 |
Autoria: |
GINTHER, O. J.; KOT, K.; WILT BANK, M. C. |
Título: |
Association between emergence of follicular waves and fluctuations in cycle in ewes. |
Ano de publicação: |
1995 |
Fonte/Imprenta: |
Theriogenology, v.43, n.3, p.689-703, 1995. |
Idioma: |
Inglês |
Conteúdo: |
Folliculogenesis was studied daily in 16 interovulatory intervals in 5 Polypay ewes from mid February through April using transrectal ultrasonic imaging. The 3-mm follicles attaining >=5 mm on Days -1 (ovulation=Day 0) to 11 showed significant peak numbers on Days 0, 5 and 10. The number of 3- and 4-mm follicles that did not reach >4 mm was not significant, indicating that these follicles did not manifest a wave pattern. A follicular wave was defined as one or more follicles growing to >=5 mm; the day the follicles were 3 mm was the day of wave emergence, and the first wave after ovulation was Wave 1. Waves 1, 2 and 3 emerged on Days -1 to 2, 4 to 7 and 8 to 10, respectively. Four interovulatory intervals in April were short (9 to 14 d), indicating the end of the ovulatory season. ln the remaining 12 intervals, the ovulatory wave was Wave 3 in one interval, Wave 4 in 8 intervals, and Wave 5 or 6 in 3 intervals. The ovulatory wave followed the rhythmic pattern of Waves 1 to 3 by emerging on Days 11 to 14 in 50% of the intervals. ln the remaining intervals, either the ovulatory wave was Wave 4 but did not emerge until Day 16 or otqer waves intervened between Wave 3 and the ovulatory wave. The longest intervals (22, 24 and 14 d) had >4 waves. Based on a cycle-detection program, peak values of FSH fluctuations were temporally associated with the emergen? pf waves as indicated by the following: 1) tendency (P<0.08) for an increase in FSH concentrations between 3 and 2 days before emergence of a wave; 2) close agreement between mean number of waves per interval (mean +- SEM, 4.1 +- 0.3) and mean number of identified FSH fluctuations (4.5 +- 0.3); 3) close agreement in length of interwave intervals (4.0 +- 0.3) and interpeak (FSH) intervals (3.6 +- 0.2); 4) positive correlation (r2=O.8) for number of the 2 events (follicular waves and FSH fluctuations) within intervals; and 5) a closer (P<0.01) temporal relationship between the 2 events than would have been expected if the events were independent. The results support a relationship between transient increases in FSH con?ntrations and emergen? of follicular waves throughout the interovulatory interval in Polypay ewes, with the 2 events occurring approximately every 4 d. MenosFolliculogenesis was studied daily in 16 interovulatory intervals in 5 Polypay ewes from mid February through April using transrectal ultrasonic imaging. The 3-mm follicles attaining >=5 mm on Days -1 (ovulation=Day 0) to 11 showed significant peak numbers on Days 0, 5 and 10. The number of 3- and 4-mm follicles that did not reach >4 mm was not significant, indicating that these follicles did not manifest a wave pattern. A follicular wave was defined as one or more follicles growing to >=5 mm; the day the follicles were 3 mm was the day of wave emergence, and the first wave after ovulation was Wave 1. Waves 1, 2 and 3 emerged on Days -1 to 2, 4 to 7 and 8 to 10, respectively. Four interovulatory intervals in April were short (9 to 14 d), indicating the end of the ovulatory season. ln the remaining 12 intervals, the ovulatory wave was Wave 3 in one interval, Wave 4 in 8 intervals, and Wave 5 or 6 in 3 intervals. The ovulatory wave followed the rhythmic pattern of Waves 1 to 3 by emerging on Days 11 to 14 in 50% of the intervals. ln the remaining intervals, either the ovulatory wave was Wave 4 but did not emerge until Day 16 or otqer waves intervened between Wave 3 and the ovulatory wave. The longest intervals (22, 24 and 14 d) had >4 waves. Based on a cycle-detection program, peak values of FSH fluctuations were temporally associated with the emergen? pf waves as indicated by the following: 1) tendency (P<0.08) for an increase in FSH concentrations between 3 and 2 days before... Mostrar Tudo |
Palavras-Chave: |
Ciclio Estralfoliculo; Genese. |
Thesagro: |
Ovino; Reprodução. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02784naa a2200193 a 4500 001 1516411 005 1996-04-12 008 1995 bl uuuu u00u1 u #d 100 1 $aGINTHER, O. J. 245 $aAssociation between emergence of follicular waves and fluctuations in cycle in ewes. 260 $c1995 520 $aFolliculogenesis was studied daily in 16 interovulatory intervals in 5 Polypay ewes from mid February through April using transrectal ultrasonic imaging. The 3-mm follicles attaining >=5 mm on Days -1 (ovulation=Day 0) to 11 showed significant peak numbers on Days 0, 5 and 10. The number of 3- and 4-mm follicles that did not reach >4 mm was not significant, indicating that these follicles did not manifest a wave pattern. A follicular wave was defined as one or more follicles growing to >=5 mm; the day the follicles were 3 mm was the day of wave emergence, and the first wave after ovulation was Wave 1. Waves 1, 2 and 3 emerged on Days -1 to 2, 4 to 7 and 8 to 10, respectively. Four interovulatory intervals in April were short (9 to 14 d), indicating the end of the ovulatory season. ln the remaining 12 intervals, the ovulatory wave was Wave 3 in one interval, Wave 4 in 8 intervals, and Wave 5 or 6 in 3 intervals. The ovulatory wave followed the rhythmic pattern of Waves 1 to 3 by emerging on Days 11 to 14 in 50% of the intervals. ln the remaining intervals, either the ovulatory wave was Wave 4 but did not emerge until Day 16 or otqer waves intervened between Wave 3 and the ovulatory wave. The longest intervals (22, 24 and 14 d) had >4 waves. Based on a cycle-detection program, peak values of FSH fluctuations were temporally associated with the emergen? pf waves as indicated by the following: 1) tendency (P<0.08) for an increase in FSH concentrations between 3 and 2 days before emergence of a wave; 2) close agreement between mean number of waves per interval (mean +- SEM, 4.1 +- 0.3) and mean number of identified FSH fluctuations (4.5 +- 0.3); 3) close agreement in length of interwave intervals (4.0 +- 0.3) and interpeak (FSH) intervals (3.6 +- 0.2); 4) positive correlation (r2=O.8) for number of the 2 events (follicular waves and FSH fluctuations) within intervals; and 5) a closer (P<0.01) temporal relationship between the 2 events than would have been expected if the events were independent. The results support a relationship between transient increases in FSH con?ntrations and emergen? of follicular waves throughout the interovulatory interval in Polypay ewes, with the 2 events occurring approximately every 4 d. 650 $aOvino 650 $aReprodução 653 $aCiclio Estralfoliculo 653 $aGenese 700 1 $aKOT, K. 700 1 $aWILT BANK, M. C. 773 $tTheriogenology$gv.43, n.3, p.689-703, 1995.
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Embrapa Caprinos e Ovinos (CNPC) |
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Registro Completo
Biblioteca(s): |
Embrapa Rondônia. |
Data corrente: |
09/09/1999 |
Data da última atualização: |
29/09/2020 |
Tipo da produção científica: |
Comunicado Técnico/Recomendações Técnicas |
Autoria: |
PEREIRA, R. G. de A.; OLIVEIRA, R. P. de. |
Afiliação: |
RICARDO GOMES DE ARAUJO PEREIRA, CPAF-RO; RAIMUNDO PARENTE DE OLIVEIRA, CPATU. |
Título: |
Avaliação fisiológica de bezerros leiteiros mantidos sob diferentes manejos. |
Ano de publicação: |
1998 |
Fonte/Imprenta: |
Porto Velho: Embrapa-CPAF Rondônia, 1998. |
Páginas: |
5 p. |
Série: |
(Embrapa -CPAF Rondônia. Comunicado técnico, 146). |
ISSN: |
0103-9458 |
Idioma: |
Português |
Conteúdo: |
O objetivo deste trabalho foi o de avaliar o comportamento fisiológico de bezerros leiteiros durante o período seco em Porto Velho, Rondônia. |
Palavras-Chave: |
Amazônia Ocidental; Avaliacao; Avaliation; Bezerros leiteiros; Brasil; Dairy calf; Embrapa Rondônia; Management; Porto Velho; Porto Velho (RO); Rondonia; Western Amazon. |
Thesagro: |
Bezerro Leiteiro; Campo Experimental; Estiagem; Fisiologia Animal; Manejo. |
Thesaurus NAL: |
Amazonia; animal physiology; Dairy calves; dairy cattle; Dry season; Physiological response. |
Categoria do assunto: |
-- L Ciência Animal e Produtos de Origem Animal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/118795/1/COT-146-avaliacao.pdf
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Marc: |
LEADER 01310nam a2200433 a 4500 001 1704093 005 2020-09-29 008 1998 bl uuuu u0uu1 u #d 022 $a0103-9458 100 1 $aPEREIRA, R. G. de A. 245 $aAvaliação fisiológica de bezerros leiteiros mantidos sob diferentes manejos. 260 $aPorto Velho: Embrapa-CPAF Rondônia$c1998 300 $a5 p. 490 $a(Embrapa -CPAF Rondônia. Comunicado técnico, 146). 520 $aO objetivo deste trabalho foi o de avaliar o comportamento fisiológico de bezerros leiteiros durante o período seco em Porto Velho, Rondônia. 650 $aAmazonia 650 $aanimal physiology 650 $aDairy calves 650 $adairy cattle 650 $aDry season 650 $aPhysiological response 650 $aBezerro Leiteiro 650 $aCampo Experimental 650 $aEstiagem 650 $aFisiologia Animal 650 $aManejo 653 $aAmazônia Ocidental 653 $aAvaliacao 653 $aAvaliation 653 $aBezerros leiteiros 653 $aBrasil 653 $aDairy calf 653 $aEmbrapa Rondônia 653 $aManagement 653 $aPorto Velho 653 $aPorto Velho (RO) 653 $aRondonia 653 $aWestern Amazon 700 1 $aOLIVEIRA, R. P. de
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