Age and growth parameters of shark-like batoids

White, J., Simpfendorfer, C.A., Tobin, A.J., and Heupel, M.R. (2014) Age and growth parameters of shark-like batoids. Journal of Fish Biology, 84 (5). pp. 1340-1353.

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Abstract

Estimates of life-history parameters were made for shark-like batoids of conservation concern Rhynchobatus spp. (Rhynchobatus australiae, Rhynchobatus laevis and Rhynchobatus palpebratus) and Glaucostegus typus using vertebral ageing. The sigmoid growth functions, Gompertz and logistic, best described the growth of Rhynchobatus spp. and G. typus, providing the best statistical fit and most biologically appropriate parameters. The two-parameter logistic was the preferred model for Rhynchobatus spp. with growth parameter estimates (both sexes combined) L-infinity=2045mm stretch total length, L-ST and k = 041year(-1). The same model was also preferred for G. typus with growth parameter estimates (both sexes combined) L-infinity=2770mm L-ST and k = 0.30year(-1). Annual growth-band deposition could not be excluded in Rhynchobatus spp. using mark-recaptured individuals. Although morphologically similar G. typus and Rhynchobatus spp. have differing life histories, with G. typus longer lived, slower growing and attaining a larger maximum size.

Item ID: 33880
Item Type: Article (Research - C1)
ISSN: 1095-8649
Keywords: Australia, biology, conservation concern, longevity, Queensland
Funders: Marine and Tropical Sciences Research Facility (MTSRF), Queensland Smart Futures Fund, James Cook University
Date Deposited: 25 Jun 2014 08:52
FoR Codes: 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060205 Marine and Estuarine Ecology (incl Marine Ichthyology) @ 40%
07 AGRICULTURAL AND VETERINARY SCIENCES > 0704 Fisheries Sciences > 070402 Aquatic Ecosystem Studies and Stock Assessment @ 60%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8302 Fisheries - Wild Caught > 830204 Wild Caught Fin Fish (excl. Tuna) @ 70%
96 ENVIRONMENT > 9605 Ecosystem Assessment and Management > 960507 Ecosystem Assessment and Management of Marine Environments @ 30%
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