Age and growth of the alfonsino Beryx splendens over the seamounts off New Caledonia
Age and growth of the alfonsino Beryx splendens over the seamounts off New Caledonia
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新喀里多尼亚海山上空的鲹鱼的年龄和生长
DOI：
10.1007/bf00346305
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发表时间：
1996
期刊：
影响因子：
2.4
通讯作者：
R. Grandperrin
中科院分区：
文献类型：
--
作者：
P. Lehodey;R. Grandperrin
通过对全耳石和耳石切片的研究，确定了新喀里多尼亚海山金眼鲷的年龄和生长。耳石中的一个生长环（环）似乎每年都被放下。它由一个不透明（夏季，快速生长）区和一个透明（冬季，缓慢生长）区组成。耳石的薄切片显示了每日的年轮，这使我们能够估计核的形成需要1000个月。核后的第一个环是不完整的。女性的生长速度高于男性。雄性在7至8岁时达到性成熟，雌性在6岁时达到性成熟。叉长>50厘米的金眼鲷最大年龄为20岁。并与其它几项关于金眼鲷生长的研究结果进行了比较。
Age and growth of the alfonsino Beryx splendens from New Caledonia seamounts were determined by examination of whole and sectioned otoliths. One growth-ring (annulus) in the otoliths appears to be laid down each year. It consists of one opaque (summer, fast-growing) zone and one hyaline (winter, slowgrowing) zone. Thin-sections of otoliths revealed daily rings which allowed us to estimate that the formation of the nucleus takes ∼10 mo. The first annulus following the nucleus is incomplete. Females have a higher growth rate than males. Sexual maturity is reached at the age of 7 to 8 yr for males and 6 yr for females. Maximum age attained would be ∼20 yr for alfonsino >50 cm in fork length. the results are compared with those from the few other studies on the growth of alfonsino.