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Comparison of the reproductive ecology of two sympatric blacktip sharks (Carcharhinus limbatus and Carcharhinus tilstoni) off north-eastern Australia with species identification inferred from vertebral counts

Harry, A. V. and Morgan, J. A. T. and Ovenden, J. R. and Tobin, A. J. and Welch, D. J. and Simpfendorfer, C. A. (2012) Comparison of the reproductive ecology of two sympatric blacktip sharks (Carcharhinus limbatus and Carcharhinus tilstoni) off north-eastern Australia with species identification inferred from vertebral counts. Journal of Fish Biology, 81 (4). pp. 1225-1233. ISSN 0022-1112

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Article Link(s): http://dx.doi.org/10.1111/j.1095-8649.2012.03400.x

Abstract

Precaudal vertebral counts were used to distinguish between 237 morphologically similar Carcharhinus limbatus and Carcharhinus tilstoni and were congruent with differences in reproductive ecology between the species. In addition to differing lengths at maturity and adult body size, the two species had asynchronous parturition, were born at different sizes and the relative frequencies of neonates differed in two coastal nursery areas. Despite evidence that hybridization can occur, these differences suggest the species are largely reproductively isolated.

Item Type:Article
Business groups:Animal Science
Additional Information:Harry, A. V. Morgan, J. A. T. Ovenden, J. R. Tobin, A. J. Welch, D. J. Simpfendorfer, C. A.
Subjects:Aquaculture and Fisheries > Fisheries
Science > Biology > Reproduction
Deposited On:27 Nov 2013 06:36
Last Modified:27 Nov 2013 06:36

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