Patterns of fecal gonadal hormone metabolites in the maned wolf (Chrysocyon brachyurus)

Theriogenology
N SongsasenD E Wildt

Abstract

Ex situ populations of maned wolves are not viable due to low reproductive efficiency. The objective of this study was to increase knowledge regarding the reproductive physiology of maned wolves to improve captive management. Fecal samples were collected 3-5 d/wk from 12 females of various reproductive age classes (young, prime breeding and aged) and reproductive histories (conceived and raised pups, conceived but lost pups, pseudo-pregnant and unpaired). Ovarian steroids were extracted from feces and assessed by enzyme immunoassay. Concentrations of estrogen metabolites gradually increased, beginning 2-5 d before breeding, and declined to baseline on the day of lordosis and copulation. Fecal progestin metabolite concentrations increased steadily during the periovulatory period, when sexual receptivity was observed, and remained elevated during pregnancy and pseudo-pregnancy. During the luteal phase, young and prime breeding-age females excreted larger amounts of progestins than those of older age classes. Furthermore, progestin concentrations were higher during the luteal phase of pregnant versus pseudo-pregnant bitches. Profiles of fecal progestin metabolites for three singleton females were unchanged throughout the breeding ...Continue Reading

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Citations

Apr 22, 2010·Reproduction : the Official Journal of the Society for the Study of Fertility·David C KerseySteven L Monfort
Aug 24, 2007·Reproduction, Fertility, and Development·Monique C J ParisRebecca L Krisher
Sep 17, 2009·Reproduction in Domestic Animals = Zuchthygiene·P ComizzoliD E Wildt
Jan 4, 2013·Reproduction in Domestic Animals = Zuchthygiene·L O TeodoroF F Souza
Aug 25, 2012·General and Comparative Endocrinology·Katherinne M SpercoskiNucharin Songsasen
Apr 1, 2017·Journal of Zoo and Wildlife Medicine : Official Publication of the American Association of Zoo Veterinarians·Copper Aitken-PalmerPriscilla H Joyner
Jan 24, 2017·Reproduction in Domestic Animals = Zuchthygiene·N SongsasenC Thongkittidilok
May 16, 2020·Conservation Physiology·Ísis Zanini das CandeiasMarcelo Alcindo de Barros Vaz Guimarães
Feb 8, 2021·Topics in Companion Animal Medicine·Marcela FayaCristina Gobello
Jun 19, 2018·General and Comparative Endocrinology·Marieke K JonesNucharin Songsasen
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Jun 3, 2021·Animals : an Open Access Journal From MDPI·Vinod KumarGovindhaswamy Umapathy
Aug 3, 2021·Reproduction in Domestic Animals = Zuchthygiene·Laura O TeodoroFabiana F Souza

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