Maturity and growth characteristics of a commercially exploited stingray, Dasyatis dipterura

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Smith, W. D., Cailliet, G. M., & Melendez, E. M. (2007). Maturity and growth characteristics of a commercially exploited stingray, Dasyatis dipterura. Marine and Freshwater Research, 58(1), 54-66. doi:10.1071/MF06083
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TitleMaturity and growth characteristics of a commercially exploited stingray, Dasyatis dipterura
AuthorsD. Smith, M. Cailliet, M. Melendez
AbstractMaturity and growth characteristics were estimated for Dasyatis dipterura from western Mexico, where it is a common component of artisanal elasmobranch fisheries. Median disc width at maturity was estimated as 57.3 cm for females (n = 126) and 46.5 cm for males (n = 55) respectively. Age estimates were obtained from 304 fishery-derived specimens (169 female, 135 male). An annual pattern of band-pair deposition was validated through modified centrum edge and marginal increment analyses. Gompertz, polynomial and von Bertalanffy growth models were fit to disc width and weight-at-age data. Resulting models were evaluated based on biological rationale, standard error of model estimates, and Akaike's information criteria. Growth characteristics differed significantly between females and males. Maximum age estimates were 28 years for females and 19 years for males. Three-parameter von Bertalanffy growth models of disc width-at-age data generated the most appropriate fits and produced relatively low estimates of instantaneous growth rates for females (DW∞ = 92.4 cm, k = 0.05, t0 = -7.61, DW0 = 31.4 cm) and males (DW ∞ = 62.2 cm, k = 0.10, t0 = -6.80, DW0 = 31.3 cm). These values are the lowest reported for myliobatiform stingrays and indicate slow growth rates in comparison with elasmobranchs in general. © CSIRO 2007.
JournalMarine and Freshwater Research
Date2007
Start page54
End page66
ISSN13231650
Subjectsage determination, Akaike information criterion, artisanal fishery, commercial species, fishery management, growth modeling, growth rate, morphology, sex-related difference, sexual maturity, size at maturity, von Bertalanffy equation, Mexico [North America], North America, Dasyatidae, Dasyatis dipterura, Elasmobranchii, Myliobatiform, Myliobatiformes
NoteCited By (since 1996):25, CODEN: AJMFA

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