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Growth dynamics of freshwater crocodiles (Crocodylus johnstoni) in the Lynd River, Queensland


Tucker, AD and Limpus, CJ and McDonald, KR and McCallum, HI, Growth dynamics of freshwater crocodiles (Crocodylus johnstoni) in the Lynd River, Queensland, Australian Journal of Zoology, 54, (6) pp. 409-415. ISSN 0004-959X (2006) [Refereed Article]

DOI: doi:10.1071/ZO06099


We analysed growth models for a population of Australian freshwater crocodiles (Crocodylus johnstoni). Competing growth models were tested with two data sets: individuals of known-age, and growth interval data from capture-recapture records. A von Bertalanffy function provided the best empirical fit of several growth models. The estimated asymptotic lengths (snout-vent length of males = 125.3 cm; females = 97.4 cm) agreed well with average lengths of the ten largest males and females in the population. Sexual size dimorphism in this species resulted from a combination of smaller mean length at maturity for females and a subsequent decline in female growth rate. Size dimorphism may result from individual trade-offs in age v. length at maturity as a consequence of sexual selection. © CSIRO 2006.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Freshwater ecology
Objective Division:Environmental Management
Objective Group:Terrestrial systems and management
Objective Field:Terrestrial biodiversity
UTAS Author:McCallum, HI (Professor Hamish McCallum)
ID Code:44358
Year Published:2006
Web of Science® Times Cited:24
Deposited By:Zoology
Deposited On:2007-05-17
Last Modified:2007-05-17

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