Spermaquantität und-qualität eines Muffelwidders (Ovis ammon musimon, Pallas 1811) im Jahresverlauf

Sackmann, H.; Schöne, Pascal

doi:10.1007/bf02242396

Zeitschrift für Jagdwissenschaft

1990

DOI: 10.1007/bf02242396

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Spermaquantität und-qualität eines Muffelwidders (Ovis ammon musimon, Pallas 1811) im Jahresverlauf

H. Sackmann¹,

Pascal Schöne

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Seasonal changes in ovulatory activity, plasma prolactin, and melatonin concentrations, in Mouflon (Ovis gmelini musimon) and Manchega (Ovis aries) ewes

Santiago-Moreno¹,

López-Sebastián²,

González-Bulnes³

et al. 2000

Reprod. Nutr. Dev.

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-Seasonal changes in ovulatory activity, plasma prolactin and melatonin concentrations were monitored in a wild (Mouflon) and a domesticated (Manchega) breed of sheep, both originating and living under similar latitudes (40°N). Mouflons express ovarian cycles significantly later than Manchega ewes (October vs. July, P < 0.001); however, they ended cycling one month later than Manchegas (April vs. March, P < 0.05). While prolactin concentrations were high when Manchega ewes started to cycle, they were at their lowest concentrations when Mouflons started cycling. Overall, mean prolactin concentrations were higher (P < 0.001) in Mouflons than Manchegas throughout most of the year. Within the limits of sampling frequency, the duration of melatonin secretion was similar in both groups during the solstice and equinox periods; however, the amplitude was lower (P < 0.01) in Mouflons than Manchegas during the solstice periods. The significant breed differences in the seasonal hormonal changes may be attributed to a genetic influence in the endocrine responses to the same photoperiodic cues. Mouflon / sheep / breeding season / melatonin / prolactinRésumé -Variations saisonnières de l'activité ovulatoire, de la prolactine et de la mélatonine plasmatiques chez la femelle Mouflon (Ovis gmelini musimon) et la brebis Manchega (Ovis aries). Les variations saisonnières de l'activité ovulatoire et des concentrations plasmatiques de prolactine et de mélatonine ont été suivies dans une race ovine sauvage (Mouflon) et une race ovine domestique Reprod. Nutr. Dev. 40 (2000) [421][422][423][424][425][426][427][428][429][430] 421

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Seasonal changes in ovulatory activity, plasma prolactin, and melatonin concentrations, in Mouflon (Ovis gmelini musimon) and Manchega (Ovis aries) ewes

Santiago-Moreno¹,

López-Sebastián²,

González-Bulnes³

et al. 2000

Reprod. Nutr. Dev.

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Spermaquantität und-qualität eines Muffelwidders (Ovis ammon musimon, Pallas 1811) im Jahresverlauf

Cited by 1 publication

References 1 publication

Seasonal changes in ovulatory activity, plasma prolactin, and melatonin concentrations, in Mouflon (Ovis gmelini musimon) and Manchega (Ovis aries) ewes

Seasonal changes in ovulatory activity, plasma prolactin, and melatonin concentrations, in Mouflon (Ovis gmelini musimon) and Manchega (Ovis aries) ewes

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