Age and growth of albacore Thunnus alalunga in the North Pacific Ocean

被引:27
|
作者
Chen, K. -S. [1 ]
Shimose, T. [2 ]
Tanabe, T. [3 ]
Chen, C. -Y. [4 ]
Hsu, C. -C. [1 ]
机构
[1] Natl Taiwan Univ, Coll Sci, Inst Oceanog, Taipei 10617, Taiwan
[2] Fisheries Res Agcy, Seikai Natl Fisheries Res Inst, Res Ctr Subtrop Fisheries, Ishigaki, Okinawa 9070451, Japan
[3] Fisheries Res Agcy, Natl Res Inst Far Seas Fisheries, Shimizu, Shizuoka 4248633, Japan
[4] Natl Kaohsiung Marine Univ, Dept Environm Engn, Kaohsiung 81143, Taiwan
关键词
age validation; growth parameter; length and mass relationship; otolith microstructure;
D O I
10.1111/j.1095-8649.2012.03292.x
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
The age and growth of North Pacific albacore Thunnus alalunga were investigated using obliquely sectioned sagittal otoliths from samples of 126 females and 148 males. Otolith edge analysis indicated that the identified annulus in a sagittal otolith is primarily formed during the period from September to February. The assessments of the fish age at first annulus formation indicated that the first annulus represents an age of <1 year. This study presents an age estimate (0.75 years) for the formation of the first annulus. The oldest fish ages observed in this study were 10 years for females and 14 years for males. The von Bertalanffy growth parameters of females estimated were L8 = 103.5 cm in fork length (LF), K = 0.340 year-1 and t0 = -0.53 years, and the parameters of males were L8 = 114.0 cm, K = 0.253 year-1 and t0 = -1.01 years. Sexual size dimorphism between males and females seemed to occur after reaching sexual maturity. The coefficients of the power function for expressing the LFmass relationship obtained from sex-pooled data were a = 2.964 x 10(-5) and b = 2.928.
引用
收藏
页码:2328 / 2344
页数:17
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