Validated age and growth of the leopard shark, Triakis semifasciata, with comments on reproduction

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Kusher, D. I., Smith, S. E., & Cailliet, G. M. (1992). Validated age and growth of the leopard shark, Triakis semifasciata, with comments on reproduction. Environmental Biology of Fishes, 35(2), 187-203. doi:10.1007/BF00002193
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TitleValidated age and growth of the leopard shark, Triakis semifasciata, with comments on reproduction
AuthorsI. Kusher, E. Smith, M. Cailliet
AbstractThe age, growth, and sexual maturation of the leopard shark, Triakis semifasciata, from central California were studied. Growth band counts in vertebral centra of 162 leopard sharks produced von Bertalanffy growth curves with L ∞, K. and t o parameters of 1536 mm. 0.082, and -2.31, respectively, for both sexes combined. The L 8 value for females (1602 mm TL) was slightly but insignificantly higher than for males (1499 mm TL), but the K and t o values were almost identical. Seasonal changes in size modes of young-of-the-year leopard sharks, centrum edge characteristics, and growth and tetracycline mark-recapture from the field were used to validate annual deposition of vertebral centrum band pairs. Sexual maturity was evaluated by the gonads and presence of sperm and eggs; males mature at 7 yr and at about 63% of asymptotic length, and females mature at 10 yr, and at about 72% of asymptotic length. This slow growth, late maturity, and relatively low fecundity may increase their susceptibility to over-exploitation. © 1992 Kluwer Academic Publishers.
JournalEnvironmental Biology of Fishes
Date1992
Volume35
Issue2
Start page187
End page203
ISSN03781909
Subjectsage, age determination, fisheries, growth, leopard shark, reproduction, shark, Pacific, (Northeast), USA, California, Triakis semifasciata
NoteCited By (since 1996):53, Fish and Fisheries, CODEN: EBFID

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