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Titolo:
Circulating LH levels and the response to exogenous GnRH in the common mole-rat: Implications for reproductive regulation in this social, seasonal breeding species
Autore:
Spinks, AC; Bennett, NC; Faulkes, CG; Jarvis, JUM;
Indirizzi:
Univ Cape Town, Dept Zool, ZA-7701 Rondebosch, Cape Town, South Africa Univ Cape Town Rondebosch Cape Town South Africa ZA-7701 wn, South Africa Univ Pretoria, Dept Zool & Entomol, ZA-0002 Pretoria, South Africa Univ Pretoria Pretoria South Africa ZA-0002 -0002 Pretoria, South Africa Zool Soc London, Inst Zool, London NW1 4RY, England Zool Soc London London England NW1 4RY nst Zool, London NW1 4RY, England
Titolo Testata:
HORMONES AND BEHAVIOR
fascicolo: 3, volume: 37, anno: 2000,
pagine: 221 - 228
SICI:
0018-506X(200005)37:3<221:CLLATR>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
CRYPTOMYS-HOTTENTOTUS-HOTTENTOTUS; HETEROCEPHALUS-GLABER; WILD COLONIES; FAMILY BATHYERGIDAE; DAMARENSIS COLONIES; INDUCED INFERTILITY; CALLITHRIX-JACCHUS; INCEST AVOIDANCE; SUPPRESSION; BIOLOGY;
Keywords:
common mole-rat; GnRH; LH; socially induced infertility; seasonal breeding;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
49
Recensione:
Indirizzi per estratti:
Indirizzo: Spinks, AC Univ Cape Town, Dept Zool, ZA-7701 Rondebosch, Cape Town, SouthAfrica Univ Cape Town Rondebosch Cape Town South Africa ZA-7701 frica
Citazione:
A.C. Spinks et al., "Circulating LH levels and the response to exogenous GnRH in the common mole-rat: Implications for reproductive regulation in this social, seasonal breeding species", HORMONE BEH, 37(3), 2000, pp. 221-228

Abstract

The effects of breeding season and reproductive status on male and female reproduction were investigated in the common mole-rat, Cryptomys hottentotus hottentotus, a cooperatively breeding rodent which exhibits a unique combination of seasonal breeding and a reproductive division of labor. Pituitary function was examined by measuring the luteinizing hormone (LH) responsesto single doses of 2 mu g exogenous gonadotrophin-releasing hormone (GnRH)and physiological saline in 69 males and 58 females from 35 wild-caught colonies. Neither males nor females exhibited any apparent manifestation of season on basal LH concentrations or an pituitary sensitivity to stimulationby exogenous GnRH. The continuance of reproductive function during the nonbreeding period is essential in common mole-rat males and females, as this period coincides with the period of maximal dispersal opportunity in the winter rainfall area they inhabit, Normal circulating levels of reproductive hormones in dispersing animals may aid intersexual recognition, assist pair-bond formation, and thus prime animals for independent reproduction. Circulating basal concentrations of LH as well as LH levels measured in responseto a single exogenous GnRH challenge were not significantly different between the reproductive and non-reproductive groups of either sex, suggesting the absence of a physiologically well-defined suppression of reproduction in subordinate common mole-rats. (C) 2000 Academic Press.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/03/20 alle ore 18:56:01