Influence of Prenatal Photoperiod on Postnatal Plasma-Concentrations of Progesterone and Prolactin in Female Red Deer (Cervus-Elaphus) Reared in Constant Equatorial Photoperiod

Clare Lesley Adam, C E Kyle, Pauline Young, D J Hirst

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Prenatal photoperiod influences postnatal prolactin secretion and the timing of reproductive development in male red deer reared from birth in a constant equatorial photoperiod (12:12 light:dark). The present trial investigated whether a similar phenomenon occurs in female red deer. Female deer whose mothers had been exposed for the last 14 weeks of gestation to long (group L, 18:6 light:dark) or short day length (group S, 6:18 light:dark) were kept from birth in constant equatorial day length with food available ad libitum. Both groups showed similar live-weight gain to 90-100 weeks of age. Blood samples taken once or twice weekly were analyzed for progesterone and prolactin. Progesterone concentrations indicated that there was no difference between the groups in the timing of the first incidence of ovarian (luteal) activity, which occurred at a normal or late age for natural puberty (67 weeks or older). Only one individual per group exhibited normal repeated luteal cyclicity since there was a high incidence of irregular or abnormal luteal function. Plasma prolactin concentrations at birth were higher in group L than group S (P < 0.001). Thereafter, although the mean and peak values did not differ significantly between the groups, there was a significant difference in the pattern of secretion; deer in group L showed significant clustering of prolactin peaks (P < 0.01) at a mean age of 48 weeks, whereas deer in group S showed a random distribution of peaks. Therefore, for female red deer raised in constant equatorial photoperiod, prenatal long day lengths did not advance timing of puberty. However, the long-term pattern of prolactin secretion tended to be synchronized by long but not by short day lengths experienced prenatally.

Original languageEnglish
Pages (from-to)77-83
Number of pages7
JournalJournal of Pineal Research
Volume18
Issue number2
Publication statusPublished - Mar 1995

Keywords

  • PUBERTY
  • PROGESTERONE
  • PROLACTIN
  • PHOTOPERIOD
  • DEER
  • BREEDING-SEASON
  • MELATONIN IMPLANTS
  • FALLOW DEER
  • DAMA-DAMA
  • SECRETION
  • EWES
  • LAMB
  • EXPOSURE
  • ADVANCE
  • puberty
  • progesterone
  • prolactin
  • photoperiod
  • deer
  • breeding-season
  • melatonnin implants
  • fallow deer
  • dama-dama
  • secretion
  • ewes
  • lamb
  • exposure
  • advance
  • puberty

Cite this

@article{fa7f54e548184e4cb079d37c1e524624,
title = "Influence of Prenatal Photoperiod on Postnatal Plasma-Concentrations of Progesterone and Prolactin in Female Red Deer (Cervus-Elaphus) Reared in Constant Equatorial Photoperiod",
abstract = "Prenatal photoperiod influences postnatal prolactin secretion and the timing of reproductive development in male red deer reared from birth in a constant equatorial photoperiod (12:12 light:dark). The present trial investigated whether a similar phenomenon occurs in female red deer. Female deer whose mothers had been exposed for the last 14 weeks of gestation to long (group L, 18:6 light:dark) or short day length (group S, 6:18 light:dark) were kept from birth in constant equatorial day length with food available ad libitum. Both groups showed similar live-weight gain to 90-100 weeks of age. Blood samples taken once or twice weekly were analyzed for progesterone and prolactin. Progesterone concentrations indicated that there was no difference between the groups in the timing of the first incidence of ovarian (luteal) activity, which occurred at a normal or late age for natural puberty (67 weeks or older). Only one individual per group exhibited normal repeated luteal cyclicity since there was a high incidence of irregular or abnormal luteal function. Plasma prolactin concentrations at birth were higher in group L than group S (P < 0.001). Thereafter, although the mean and peak values did not differ significantly between the groups, there was a significant difference in the pattern of secretion; deer in group L showed significant clustering of prolactin peaks (P < 0.01) at a mean age of 48 weeks, whereas deer in group S showed a random distribution of peaks. Therefore, for female red deer raised in constant equatorial photoperiod, prenatal long day lengths did not advance timing of puberty. However, the long-term pattern of prolactin secretion tended to be synchronized by long but not by short day lengths experienced prenatally.",
keywords = "PUBERTY, PROGESTERONE, PROLACTIN, PHOTOPERIOD, DEER, BREEDING-SEASON, MELATONIN IMPLANTS, FALLOW DEER, DAMA-DAMA, SECRETION, EWES, LAMB, EXPOSURE, ADVANCE, puberty , progesterone, prolactin, photoperiod, deer, breeding-season, melatonnin implants, fallow deer, dama-dama, secretion, ewes, lamb, exposure, advance, puberty",
author = "Adam, {Clare Lesley} and Kyle, {C E} and Pauline Young and Hirst, {D J}",
year = "1995",
month = "3",
language = "English",
volume = "18",
pages = "77--83",
journal = "Journal of Pineal Research",
issn = "0742-3098",
publisher = "Wiley-Blackwell",
number = "2",

}

TY - JOUR

T1 - Influence of Prenatal Photoperiod on Postnatal Plasma-Concentrations of Progesterone and Prolactin in Female Red Deer (Cervus-Elaphus) Reared in Constant Equatorial Photoperiod

AU - Adam, Clare Lesley

AU - Kyle, C E

AU - Young, Pauline

AU - Hirst, D J

PY - 1995/3

Y1 - 1995/3

N2 - Prenatal photoperiod influences postnatal prolactin secretion and the timing of reproductive development in male red deer reared from birth in a constant equatorial photoperiod (12:12 light:dark). The present trial investigated whether a similar phenomenon occurs in female red deer. Female deer whose mothers had been exposed for the last 14 weeks of gestation to long (group L, 18:6 light:dark) or short day length (group S, 6:18 light:dark) were kept from birth in constant equatorial day length with food available ad libitum. Both groups showed similar live-weight gain to 90-100 weeks of age. Blood samples taken once or twice weekly were analyzed for progesterone and prolactin. Progesterone concentrations indicated that there was no difference between the groups in the timing of the first incidence of ovarian (luteal) activity, which occurred at a normal or late age for natural puberty (67 weeks or older). Only one individual per group exhibited normal repeated luteal cyclicity since there was a high incidence of irregular or abnormal luteal function. Plasma prolactin concentrations at birth were higher in group L than group S (P < 0.001). Thereafter, although the mean and peak values did not differ significantly between the groups, there was a significant difference in the pattern of secretion; deer in group L showed significant clustering of prolactin peaks (P < 0.01) at a mean age of 48 weeks, whereas deer in group S showed a random distribution of peaks. Therefore, for female red deer raised in constant equatorial photoperiod, prenatal long day lengths did not advance timing of puberty. However, the long-term pattern of prolactin secretion tended to be synchronized by long but not by short day lengths experienced prenatally.

AB - Prenatal photoperiod influences postnatal prolactin secretion and the timing of reproductive development in male red deer reared from birth in a constant equatorial photoperiod (12:12 light:dark). The present trial investigated whether a similar phenomenon occurs in female red deer. Female deer whose mothers had been exposed for the last 14 weeks of gestation to long (group L, 18:6 light:dark) or short day length (group S, 6:18 light:dark) were kept from birth in constant equatorial day length with food available ad libitum. Both groups showed similar live-weight gain to 90-100 weeks of age. Blood samples taken once or twice weekly were analyzed for progesterone and prolactin. Progesterone concentrations indicated that there was no difference between the groups in the timing of the first incidence of ovarian (luteal) activity, which occurred at a normal or late age for natural puberty (67 weeks or older). Only one individual per group exhibited normal repeated luteal cyclicity since there was a high incidence of irregular or abnormal luteal function. Plasma prolactin concentrations at birth were higher in group L than group S (P < 0.001). Thereafter, although the mean and peak values did not differ significantly between the groups, there was a significant difference in the pattern of secretion; deer in group L showed significant clustering of prolactin peaks (P < 0.01) at a mean age of 48 weeks, whereas deer in group S showed a random distribution of peaks. Therefore, for female red deer raised in constant equatorial photoperiod, prenatal long day lengths did not advance timing of puberty. However, the long-term pattern of prolactin secretion tended to be synchronized by long but not by short day lengths experienced prenatally.

KW - PUBERTY

KW - PROGESTERONE

KW - PROLACTIN

KW - PHOTOPERIOD

KW - DEER

KW - BREEDING-SEASON

KW - MELATONIN IMPLANTS

KW - FALLOW DEER

KW - DAMA-DAMA

KW - SECRETION

KW - EWES

KW - LAMB

KW - EXPOSURE

KW - ADVANCE

KW - puberty

KW - progesterone

KW - prolactin

KW - photoperiod

KW - deer

KW - breeding-season

KW - melatonnin implants

KW - fallow deer

KW - dama-dama

KW - secretion

KW - ewes

KW - lamb

KW - exposure

KW - advance

KW - puberty

M3 - Article

VL - 18

SP - 77

EP - 83

JO - Journal of Pineal Research

JF - Journal of Pineal Research

SN - 0742-3098

IS - 2

ER -