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蔡杏伟, 郭超, 廖传松, 李为, 樊厚瑞, 刘家寿. 傀儡湖似刺鳊种群生长特征及资源量评估研究[J]. 水生生物学报, 2022, 46(3): 348-354. DOI: 10.7541/2022.2020.029
引用本文: 蔡杏伟, 郭超, 廖传松, 李为, 樊厚瑞, 刘家寿. 傀儡湖似刺鳊种群生长特征及资源量评估研究[J]. 水生生物学报, 2022, 46(3): 348-354. DOI: 10.7541/2022.2020.029
CAI Xing-Wei, GUO Chao, LIAO Chuan-Song, LI Wei, FAN Hou-Rui, LIU Jia-Shou. POPULATION GROWTH CHARACTERISTICS AND STOCK ASSESSMENT OF PARACANTHOBRAMA GUICHENOTI (BLEEKER, 1864) IN KUILEI LAKE, JIANGSU PROVINCE, CHINA[J]. ACTA HYDROBIOLOGICA SINICA, 2022, 46(3): 348-354. DOI: 10.7541/2022.2020.029
Citation: CAI Xing-Wei, GUO Chao, LIAO Chuan-Song, LI Wei, FAN Hou-Rui, LIU Jia-Shou. POPULATION GROWTH CHARACTERISTICS AND STOCK ASSESSMENT OF PARACANTHOBRAMA GUICHENOTI (BLEEKER, 1864) IN KUILEI LAKE, JIANGSU PROVINCE, CHINA[J]. ACTA HYDROBIOLOGICA SINICA, 2022, 46(3): 348-354. DOI: 10.7541/2022.2020.029

傀儡湖似刺鳊种群生长特征及资源量评估研究

POPULATION GROWTH CHARACTERISTICS AND STOCK ASSESSMENT OF PARACANTHOBRAMA GUICHENOTI (BLEEKER, 1864) IN KUILEI LAKE, JIANGSU PROVINCE, CHINA

  • 摘要: 2013年4月至2014年12月, 在昆山市傀儡湖开展了似刺鳊种群生长特征及资源量评估的研究。结果表明, 傀儡湖似刺鳊种群共有6个年龄组, 优势年龄组为1至2龄, 占总数的72.18%; 其次为3至4龄年龄组 (22.59%); 5至6龄年龄组仅占4.62%。全长与体重呈幂函数的增长关系: W=0.0037L3.3137(n=512, R2=0.99), 属正异速生长型。全长和体重的von-Bertalanffy生长方程分别为Lt=41.16×1–e–0.308(t+0.4953)Wt=828.11×1–e–0.308(t+0.4953)3.3137, 生长拐点年龄ti=3.39龄, 拐点全长Li=28.7 cm; 拐点体重Wi=251.34 g。为可持续利用傀儡湖似刺鳊种群资源, 建议似刺鳊的起捕体重在251.34 g 以上。似刺鳊种群总死亡系数为1.21/a, 自然死亡系数为0.63/a, 捕捞死亡系数为0.58, 资源开发率为0.48, 初始资源尾数为7.34万尾, 初始资源总量为9560 kg。傀儡湖似刺鳊种群处于合理开发状态。

     

    Abstract: From April 2013 to December 2014, the Paracanthobrama guichenoti were sampled and the population characteristics and stock assessment of Paracanthobrama guichenoti were carried out in Kuilei Lake in Jiangsu Province. The results indicated that the population of Paracanthobrama guichenoti was consisted of 6 age classes, of which the dominant age class was 1—2 years old, accounting for 72.18% of the total individuals. The second age class was 3—4 years old (22.59%), and the 5—6 years old age class accounted for only 4.62%. The relationship between the total length (L) and the body weight (W) can be expressed by the power function equation W=0.0037L3.3137. The von-Bertalanffy of Paracanthobrama guichenoti can be predicated by the following equations: Lt=41.161–e–0.308(t+0.4953); Wt=828.111–e–0.308(t+0.4953)3.3137. The growth parameter of L and W were 41.16 cm and 828.11 g, respectively. The growth inflexion point was ti=3.39, and the corresponding total length and the body weight were 28.7 cm and 251.34 g, respectively. Our study suggests that the harvesting age should be over 3.39 years old in order to realize rational and sustainable utilization of the population resource in Kuilei Lake. The total mortality, the natural mortality, the fishing mortality, and the exploitation rate were 1.21/a, 0.63/a, 0.58/a and 0.48, respectively, and the total original resources of Paracanthobrama guichenoti were 9560 kg. Our study indicates that the exploitation of the population was in a reasonable state.

     

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