Boom and bust: a review of the physiology of the marsupial genus Antechinus

Naylor, R, Richardson, S and McAllan, B 2008, 'Boom and bust: a review of the physiology of the marsupial genus Antechinus', Journal of Comparative Physiology B: Biochemical Systemic and Environmental Physiology, vol. 178, no. 5, pp. 545-562.


Document type: Journal Article
Collection: Journal Articles

Title Boom and bust: a review of the physiology of the marsupial genus Antechinus
Author(s) Naylor, R
Richardson, S
McAllan, B
Year 2008
Journal name Journal of Comparative Physiology B: Biochemical Systemic and Environmental Physiology
Volume number 178
Issue number 5
Start page 545
End page 562
Total pages 17
Publisher Springer
Abstract The marsupial genus Antechinus is a group of small carnivorous marsupials from the order Dasyuromorphia (Family Dasyuridae) and is found in eastern Australia. The life history of all species in the genus is characterized by a complex, but highly synchronized life cycle in both sexes, culminating in a short mating period followed by total male mortality (semelparity). The breeding season is defined by a specific rate of increase in photoperiod, which is different for each species. In Antechinus spp., male mortality is due to the effects of high free testosterone and cortisol levels on many organ systems. Unusually, spermatogenesis is complete before testosterone levels begin to rise at the winter solstice. In males, low sperm counts have been compensated for by high proportions of sperm reaching the isthmus of the female reproductive tract and long-term storage in the crypts. The females survive to rear their young and may mate again in their second year. Gestation lasts from 26 to 34 days, depending on the species. However, developmental arrest can occur at several stages during embryogenesis, elongating the apparent gestation duration by several days. Several species have strong female sex biases in their litters. The high degree of life history synchrony and the cascade of endocrine-driven physiological events that result in male death are unusual physiological characteristics for mammals. Suggestions why semelparity may have evolved in Antechinus are discussed.
Subject Endocrinology
DOI - identifier 10.1007/s00360-007-0250-8
Copyright notice © Springer-Verlag 2008
ISSN 0174-1578
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 31 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 30 times in Scopus Article | Citations
Altmetric details:
Access Statistics: 217 Abstract Views  -  Detailed Statistics
Created: Tue, 01 Sep 2009, 11:08:54 EST by Catalyst Administrator
© 2014 RMIT Research Repository • Powered by Fez SoftwareContact us