Age, growth and maturity for two highly targeted jack species: Caranx ignobilis and Caranx melampygus

Cassandra Pardee; John Wiley; Sarah Springer

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Age, growth and maturity for two highly targeted jack species: Caranx ignobilis and Caranx melampygus

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Abstract This study provides growth rate, longevity and maturity estimates for the two important species of jack in Hawaiʻi: ulua aukea/giant trevally Caranx ignobilis and omilu/bluefin trevally Caranx melampygus. Maximum observed ages for C. ignobilis and C. melampygus were 31 years and 24 years, respectively. Combined sex von Bertalanffy growth parameter values for C. ignobilis and C. melampygus were as follows: L∞ = 1064 mm and K = 0.18 year−1; and L∞ = 718 mm and K = 0.20 year−1, respectively. Female size at maturity was significantly greater than males for both C. ignobilis and C. melampygus. Size and age at maturity for C. ignobilis was 594 mm and 4.4 years for females and 465 mm and 2.8 years for males. Size and age at maturity for C. melampygus was 372 mm and 4.1 years for females and 329 mm and 2.9 years for males. This study provides the first robust demographic data for both of these highly prized and ecologically important predatory species in Hawaiʻi, which can be used for future assessments or management.

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《Journal of Fish Biology》 |2021年第4期|1247-1255|共9页
作者
Cassandra Pardee; John Wiley; Sarah Springer;
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作者单位

Poseidon Fisheries Research;

Hawai'i Pacific University;

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原文格式 PDF
正文语种英语
中图分类鱼纲;
关键词
age; Carangidae; growth; histology; maturity; otoliths;

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Age, growth and maturity for two highly targeted jack species: Caranx ignobilis and Caranx melampygus

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