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Life history of the frog Crinia signifera in Tasmania, Australia


Lauck, V, Life history of the frog Crinia signifera in Tasmania, Australia, Australian Journal of Zoology, 53, (1) pp. 21-27. ISSN 0004-959X (2005) [Refereed Article]

DOI: doi:10.1071/ZO04028


A pitfall-trap study was used to investigate the importance of body size, age, body condition (males only), season and growth history as determinates of male and female life-history fitness traits in a population of the frog Crinia signifera. Specimens were dissected to determine physiological characteristics and skeletochronology was used to determine age. Females lived longer and attained a larger size than males by delaying sexual maturity. Most females and males attained sexual maturity after three and two years, respectively; although eggs were found in females as young as one year old. Body size (but not age) was the primary determinant of fecundity, total reproductive output (clutch mass) and oviduct mass for females. Season was the predominant influence on egg size, with smaller eggs produced in summer than in other seasons. Direct investment in male gonads (testes size) was determined by body size and also by age. This, and the fact that sexual size dimorphism in amphibians is commonly female biased, suggests that male size is not necessarily the primary determinant of male reproductive success in C. signifera. Whereas selection on reproductive traits in females is likely to act predominantly on body size, selection in males is also likely to act on survival. © CSIRO 2005.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Population ecology
Objective Division:Environmental Management
Objective Group:Terrestrial systems and management
Objective Field:Terrestrial biodiversity
UTAS Author:Lauck, V (Miss Veronica Lauck)
ID Code:37946
Year Published:2005
Web of Science® Times Cited:11
Deposited By:Zoology
Deposited On:2005-08-01
Last Modified:2011-09-26

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