Seasonal patterns of luteal cyclicity in young red deer (Cervus elaphus) and sambar deer (Cervus unicolor)
-
Published:1997
Issue:6
Volume:9
Page:587
-
ISSN:1031-3613
-
Container-title:Reproduction, Fertility and Development
-
language:en
-
Short-container-title:Reprod. Fertil. Dev.
Author:
Asher G. W.,Muir P. D.,Semiadi G.,O'Neill K. T.,Scott I. C.,Barry T. N.
Abstract
Seasonal onset of pubertal ovulation and incidence of luteal cyclicity was
assessed from plasma progesterone proles over 15 months for tame red deer
(n = 7) and sambar deer (n
= 7) hinds. Seasonal responses to photoperiod were determined from
plasma prolactin proles. 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 dened 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.
Publisher
CSIRO Publishing
Subject
Developmental Biology,Endocrinology,Genetics,Molecular Biology,Animal Science and Zoology,Reproductive Medicine,Biotechnology
Cited by
18 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献