Seasonal patterns of luteal cyclicity in young red deer (Cervus elaphus) and sambar deer (Cervus unicolor)

Reproduction, Fertility, and Development
G W AsherT N Barry

Abstract

Seasonal onset of pubertal ovulation and incidence of luteal cyclicity was assessed from plasma progesterone profiles over 15 months for tame red deer (n = 7) and sambar deer (n = 7) hinds. Seasonal responses to photoperiod were determined from plasma prolactin profiles. All red deer attained puberty at 17-18 months of age in May-June and expressed 3-6 luteal cycles of length 20.0+/-10.4 days (mean+/-s.e.m.) over 52-102 days. Six sambar deer attained puberty at 7-19 months of age, between August and December. Duration of luteal cyclicity was variable. While one animal remained continuously cyclic for 13 months, most entered anoestrus between November and February. The mean length of the luteal cycle was 17.2+/-0.3 days. While red deer exhibited strongly seasonal patterns of prolactin secretion, sambar deer showed no such seasonal trends. The data collectively indicate that young sambar hinds at temperate latitudes exhibit loosely defined patterns of reproductive seasonality that are 4-6 months out of phase with those of red deer, although some individuals may be non-seasonal. Failure to express seasonal patterns of prolactin secretion indicates that sambar deer may not perceive photoperiodic cues to the same extent as do red deer.

Citations

Jan 21, 2014·Journal of Zoo and Wildlife Medicine : Official Publication of the American Association of Zoo Veterinarians·Robin O LydaJay F Kirkpatrick
Dec 1, 1995·Anatomia, histologia, embryologia·K J Stafford
Apr 19, 2011·Animal Reproduction Science·G W AsherR P Littlejohn
Oct 5, 2010·Animal Reproduction Science·G W Asher
Dec 8, 2014·Behavioural Processes·Francisco CeaceroMartin Zábranský
Mar 22, 2001·Biology of Reproduction·D C SkinnerJ D Skinner
Jul 29, 2003·Journal of Experimental Zoology. Part A, Comparative Experimental Biology·Andres Jose GarciaLaureano Gallego

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