Seasonal fluctuations in plasma progesterone concentrations in Gentile-di-Puglia and Ile-de-France ewes in southern Italy

Dell'Aquila, S.; Varriale, Bruno; Alberico, G.; Pierantoni, Riccardo

doi:10.1530/jrf.0.0830825

Cited by 3 publications

(2 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be said that 36.4% of ewes show estrous regularly throughout the year. These results showed that WK has a comparatively long breeding season when compared with other northern hemisphere sheep breeds (Bartlewski et al, 1999a;Dell'Aquila et al, 1988;Gómez-Brunet et al, 2008). The results from our anestrous P4 levels were also similar with anestrous P4 levels from other sheep breed (Ferreira-Silva et al, 2017;Sasa, Rodrigues, Nonaka, Balieiro, & Coelho, 2016).…”

Section: Discussionmentioning

confidence: 81%

“…Breeding season lengths according to endocrinological and behavioral data in WK were found noticeably longer than breeding season lengths for Ile de France and Gentile de Puglia breeds (Dell'Aquila, Varriale, & Alberico, 1988). White Karaman breeding season lengths from behavioral data were also longer than some Turkish sheep breed such as Dağlıç and Chios (Kaymakçı, 1984;Kaymakçı et al, 1987).…”

Section: Discussionmentioning

confidence: 87%

See 1 more Smart Citation

<b>Reproductive cycles in white Karaman ewes: comparison of ovarian hormone secretion and reproductive behavior in non-pregnant and pregnant ewes in semi-intensive conditions

Arsoy

Sağmanligil

2018

Acta Sci. Anim. Sci.

View full text Add to dashboard Cite

The objective of this study was to characterize the reproductive cycle both endocrinologically and behaviorally in ewes. Blood samples were analyzed by EIA for progesterone (P 4 ), and RIA for estradiol in order to determine the breeding strategy of non-pregnant (n = 11) and pregnant (n = 9) White Karaman throughout the year in the Middle Anatolia (39.57 0 N, 32.53 0 W), Turkey. Estrous cycle lengths and estrous lengths were 18.36 ± 1.03 days and 35.16 ± 5.95 hours, respectively. The breeding season durations were 283 ± 63.36 days and 229.64 ± 63.74 days according to hormonal and behavioral data respectively (p ≤ 0.01). The highest and lowest data of estrous occurrence frequency was observed in October and June-July, respectively. P 4 levels ranged from 0.01 to 9.0 ng mL -1 throughout the year and from 0.01 to 0.16 ng mL -1 during anestrous. Mean plasma estradiol levels were 8.42 ± 2.51 pg mL -1 during the estrous cycle. Postpartum anestrous durations were 134.8 ± 18.5 and 120.78 ± 29.89 days (n = 9) according to behavioral observation and hormonal data, respectively. P 4 concentration for the months 1 -5 of the gestation period ranged from 4.54 to 15.08 ng mL -1 . P 4 concentrations in 4 th and 5 th months of gestation were higher than the other months (p ≤ 0.01). White Karaman reproductive activity is characterized by an extended breeding season and their relatively insensitivity to photoperiod stimulation allows for efficient out of season lamb production.Ciclo reprodutivo de ovelhas brancas Karaman: comparação da secreção de hormônio ovariano e do comportamento reprodutivo de ovelhas não gestantes e gestantes em condições semi-intensivo RESUMO. O objetivo deste estudo foi caracterizar o ciclo reprodutivo, endocrinológico e o comportamento de ovelhas Karaman. Análises de sangue foram analisadas pelo EIA para progesterona (P 4 ) e RIA para estradiol para determinar as estratégias de reprodução do Karaman Branca de não gestantes (n = 11) e de gestantes (n = 9) durante o todo o ano, em Anatólia, Turkia. O Ciclo estral e a duração do estro foram 18.36 ± 1.03 dias e 35.16 ± 5.95 horas, respectivamente. As durações da época de reprodução foram de 283 ± 63.36 e 229.64 ± 63.74 dias de acordo com os dados hormonais e comportamentais, respectivamente (p ≤ 0.01). Os maiores e menores dados de frequência do estro ocorreram em outubro e junho-julho, respectivamente. Os níveis de P 4 variaram de 0.01 para 9.0 ng ML -1 ao longo do ano e 0.01 -0.16 ng mL -1 durante o cio. Níveis médios do plasma de estradiol foram 8.42 ± 2.51 pg mL -1 durante o ciclo estral. As durações do pós-parto foram de 134.8 ± 18.5 dias e 120.78 ± 29.89 dias (n = 9) de acordo com a observação do comportamento e os dados hormonais, respectivamente. Concentrações de P 4 durante os meses 1 até o 5 do período de gestação variou de 4.54 para 15.08 ng mL -1 . Concentrações de P 4 no quarto e quinto mês de gestação foram maiores do que nos outros meses (p < 0.01). A atividade reprodutiva do White Karaman é caracterizada por um período de reprodução estendido e...

show abstract