博文
Size at sexual maturity of bigeye tuna
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The size and
proportions of bigeye tuna reach maturity in the stock is an important
reference for decision making in fisheries management. The size at 50% sexual
maturity (L50) of bigeye
tuna, Thunnus obesus, was
investigated, the data was taken from the 1,042 sampling fish caught from the
tropical Atlantic Ocean (TAO), 1,313 from the west-central tropical Indian Ocean
(WCTIO) and 391 from the Eastern and Central Tropical Pacific Ocean (ECTPO) and
five common models were used for estimating the parameter L50. The results showed that the observed minimum fork
length that attained sexual maturity for female (male) bigeye tuna in the TAO, female
(male) bigeye tuna in the WCTIO, and female bigeye tuna in the ECTPO to be
around 104 cm (108 cm), 110 cm (110 cm)
and 94 cm,
respectively. The estimated L50
of female bigeye tuna in the TAO, the
WCTIO and the ECTPO were 117.7 cm, 119.3 cm and 117.5 cm respectively.
However, for male bigeye tuna, the estimated L50 in the TAO (119.5 cm)
was larger than that in the WCTIO (117.7 cm). The Akaike’s information criterion showed
that the Lysack’s (1980) model can be accepted as the best model for estimating L50 of bigeye tuna. [pdf]
https://wap.sciencenet.cn/blog-223390-454201.html
上一篇：Reproductive biology of bigeye tuna in Eastern Pacific Ocean
下一篇：印度洋金枪鱼渔业平均营养级的长期变动
https://wap.sciencenet.cn/blog-223390-454201.html
上一篇：Reproductive biology of bigeye tuna in Eastern Pacific Ocean
下一篇：印度洋金枪鱼渔业平均营养级的长期变动
