Page 87 - 《水产学报》2025年第12期

郭有俊，等 水产学报, 2025, 49(12): 129307

Age and growth of Sthenoteuthis oualaniensis based on statolith in
the eastern Indian Ocean

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GUO Youjun , ZENG Xiaowei , WU Wenxiu , LING Weiqi ,
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ZHAO Chunxu , LI Yuan , YAN Yunrong 1,2,4*
1. College of Fisheries, Guangdong Ocean University, Zhanjiang 524088, China;
2. Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang), Zhanjiang 524000, China;
3. Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China;
4. Guangdong Provincial Engineering and Technology Research Center of Far Sea Fisheries Management and
Fishing of South China Sea, Zhanjiang 524088, China

Abstract: Based on the analysis of squid growth increments, the squid growth characters were study and offered reference for
the fishery production and utilize of Sthenoteuthis oualaniensis in the eastern Indian Ocean. By calculated the absolute growth
rate and instantaneous growth rate of S. oualaniensis, the difference of squid growth rate was analysed, and based on the
Akaikes's information criterion (AIC), fit out the optimal growth model. The result showed that the S. oualaniensis age ranged
40-99 d in the medium form, and the S. oualaniensis age ranged 40-79 d in the dwarf form in the eastern Indian Ocean. The
medium form S. oualaniensis age was greater than the dwarf form, and the female S. oualaniensis age was greater than the
male. The S. oualaniensis age was lower in the equatorial seas, and the squid age was higher in higher latitude area. The S.
oualaniensis mantle length absolute growth rate ranged 0.39-2.16 mm/d, and the instantaneous growth rate ranged 0.35%-
1.78%. The S. oualaniensis body weight absolute growth rate ranged 0.54-7.70 g/d, and the instantaneous growth rate ranged
1.20%-5.20%. The S. oualaniensis mantle length and body weight absolute growth rate increased with the increase of age. The
female S. oualaniensis growth rates were higher than the male S. oualaniensis. The growth models were fitted with age and
mantle length data, and the AIC values of each model were calculated. The minimum AIC value was liner model in total, power
function model in the medium form male S. oualaniensis, liner model in the medium form female S. oualaniensis, power func-
tion in the dwarf form male S. oualaniensis, index model in the dwarf form female S. oualaniensis. The age and growth rate of
female squid was higher than that of male, and the medium form higher than that of dwarf form in the eastern Indian Ocean.
Key words: Sthenoteuthis oualaniensis; statolith; age structure; growth rate; growth model; the eastern Indian Ocean

Corresponding author: YAN Yunrong. E-mail: yryan_gdou@163.com
Funding projects: Natural Science Foundation of Guangdong Province (2024B1212040002); Southern Marine Science and
Engineering Guangdong Laboratory (Zhanjiang) (ZJW-2022-07,ZJW-2024-15); National Programme on Global Change and
Air-Sea Interaction (II) (GASI-01-EINDYD01aut/spr); Undergraduate Training Programs for Innovation and Entrepreneurship
of Guangdong Province (S202110566007); Guangdong Provincial Engineering and Technology Research Center of Far Sea
Fisheries Management and Fishing of South China Sea Matching Funds

https://www.china-fishery.cn 中国水产学会主办 sponsored by China Society of Fisheries
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