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Growth dynamics of freshwater crocodiles (Crocodylus johnstoni) in the Lynd River, Queensland
journal contributionposted on 2023-05-16, 19:11 authored by Tucker, AD, Limpus, CJ, McDonald, KR, McCallum, HI
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. Â© CSIRO 2006.
Publication titleAustralian Journal of Zoology
Department/SchoolSchool of Natural Sciences
Place of publicationAustralia