Age and Growth of the Whiskery Shark, Furgaleus macki, from Southwestern Australia

摘要: Age and growth of the whiskery shark, Furgaleus macki, from southwestern Australia were examined using vertebral ageing tag-recapture data. The readability bands on centra varied markedly between individuals. Four readers used to make band counts, with most experienced reader having lowest ‘index average percent error’ highest level agreement final counts. Marginal increment analysis indicated that opaque form in January. With parturition occurring August October, size data suggests first is probably formed 15–17 months after birth. age at maturity was estimated be 4.5 years for males, 6.5 females. oldest male 10.5 years, female 11.5 years. Von Bertalanffy parameters males L∞=121.5 cm fork length, K=0.423 year−1, t0=−0.472 L∞=120.7 K=0.369 t0=−0.544 females, L∞=118.1 K=0.420 t0=−0.491 combined sexes. Data a tag recapture study analysed maximum likelihood method verify estimates ageing. L∞=128.2 K=0.288 t0=−0.654 two methods estimating produced similar results, rapid until approximately 5 age, which there little increase length.