The reproductive cycle in the male hedgehog (Erinaceus europaeus L.) : a study of endocrine and exocrine testicular functions

Saboureau, Michel; Dutourné, B.

doi:10.1051/rnd:19810110

Cited by 20 publications

(8 citation statements)

References 28 publications

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“…It has been established that the onset of spermatogenic activity occurs during the denning period in black bears [5,24] and brown bears [25] as well as in other deep hibernating mammals such as ground squirrels [10,12], European hedgehogs [4,21], and golden hamsters [22]. Serum testosterone profiles of black bears indicated that the activity of the reproductive endocrine system begins to increase during denning [11,17,24].…”

mentioning

confidence: 99%

Sex Steroid and Prolactin Profiles in Male American Black Bears (Ursus americanus) during Denning.

Tsubota

Garshelis

Nelson

et al. 1999

The Journal of Veterinary Medical Science

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ABSTRACT. Serum sex steroid and prolactin profiles were examined in the male American black bear, Ursus americanus during denning. Sera collected in December and the following March from 8 denning male black bears in Minnesota, U.S.A. were assayed for testosterone, estradiol-17β and prolactin. Eight bears were confirmed to be the denning mode based on a serum urea to creatinine ratio less than 10. Serum testosterone concentrations tended to increase from December to the subsequent March whereas serum estradiol-17β concentrations tended to decrease during this period. There were few changes in serum prolactin concentrations between December and March. These findings suggest that spermatogenesis and testicular steroidogenesis initiated during denning may be influenced by changes in serum sex steroid concentrations in the American black bear.-KEY WORDS: bear, denning, sex steroid.

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mentioning

confidence: 99%

Sex Steroid and Prolactin Profiles in Male American Black Bears (Ursus americanus) during Denning.

Tsubota

Garshelis

Nelson

et al. 1999

The Journal of Veterinary Medical Science

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“…Plasma testosterone at 57°N shows a period of elevation 2 months shorter in duration than at 46°N (Saboureau & Boissin, 1978;Saboureau & Dutourné, 1981), rising and falling 1 month later and earlier respectively. This later reactivation, and earlier involution, is associated with the shorter summers at 57°N, spermatogenesis occurring over a shorter period.…”

Section: Discussionmentioning

confidence: 99%

Seasonal endocrine cycles in the European hedgehog, Erinaceus europaeus

Fowler

1988

Reproduction

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“…Testicular activity, including an increase in testis size and rising testosterone levels, has been reported to start towards the end of heterothermy in some hibernators, eg Belding's ground squirrels Spermophilus beldingi (Bushberg and Holmes 1985), Golden-mantled ground squirrels S. lateralis (Barnes et al 1988), Uinta ground squirrels S. armatus (Ellis et al 1983), woodchucks Marmota monax (Concannon et al 1989), Turkish hamsters Mesocricetus brandti (Darrow et al 1987), and European hedgehogs Erinaceus europaeus (Saboureau and Dutourné 1981).…”

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confidence: 99%

Testis development and testosterone secretion in captive European ground squirrels before, during, and after hibernation

Strauss

Hoffmann

Vielgrader³

et al. 2008

Acta Theriol

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Timing of reproduction constitutes a major decision in life history delimited by resource availability and mortality risk. Hibernating species are subject to additional temporal constraints. Both sexes have to cope with a short active season in completing gonadal development, reproduction, and prehibernatory fattening. Males have to adapt to the strict seasonality and must be reproductively competent [47] Acta Theriologica 53 (1): 47-56, 2008. . 2008. Testis development and testosterone secretion in captive European ground squirrels before, during, and after hibernation. Acta Theriologica 53: 47-56.In some hibernating species, an extended euthermic period before spring emergence has been reported during which testicular maturation occurred. In this study, we investigated whether male European ground squirrels Spermophilus citellus (Linnaeus, 1766) develop scrotal testes before or after the termination of hibernation. The course of testis development and testosterone concentrations were examined in young-of-year male ground squirrels (n = 4) before, during, and after their first hibernation. In the environmental chamber, all animals showed regular hibernation patterns with decreasing torpor bout lengths prior to the end of hibernation. Four weeks before hibernation ended, testosterone levels were elevated during spontaneous arousals. Testosterone concentrations peaked during the first 2 months post heterothermy and decreased thereafter. In 2 experimental males, testes descended from the inguinal region into the scrotum shortly before the end of heterothermy. The state of testis development and testosterone secretion corresponded to that found in semi-free-living males at spring emergence. Testis size increased in active animals to maximum widths during weeks 3 and 4 post heterothermy. Scrotal skin pigmentation was absent until heterothermy ended and developed during the first month thereafter. The data suggest that male S. citellus do not need a pre-emergence euthermic period for reproductive development.

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The reproductive cycle in the male hedgehog (Erinaceus europaeus L.) : a study of endocrine and exocrine testicular functions

Abstract: Summary. Seasonal Introduction.

Cited by 20 publications

References 28 publications

Sex Steroid and Prolactin Profiles in Male American Black Bears (Ursus americanus) during Denning.

Sex Steroid and Prolactin Profiles in Male American Black Bears (Ursus americanus) during Denning.

Seasonal endocrine cycles in the European hedgehog, Erinaceus europaeus

Testis development and testosterone secretion in captive European ground squirrels before, during, and after hibernation

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