| 杭州湾北部安氏白虾体长与体重关系的季节变化特征 |
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| 引用本文： | 王淼,周轩,洪波,徐开达,张亚洲.杭州湾北部安氏白虾体长与体重关系的季节变化特征[J].中国水产科学,2020,27(11):1325-1332. |
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| 作者姓名： | 王淼 周轩 洪波 徐开达 张亚洲 |
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| 作者单位： | 上海市水产研究所, 上海 200433;浙江省海洋水产研究所, 浙江省海洋渔业资源可持续利用技术研究重点实验室, 浙江 舟山 316021 |
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| 基金项目： | 国家重点研发计划项目（2019YFD0901204）；上海市科技兴农重点攻关项目（2017-02-08-00-07-F00075）；浙江省重点研发计划项目（2019C02056）. |
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| 摘 要： | 为掌握安氏白虾（Palaemon annandalei）的生长特性，根据2018年2月、5月、8月和11月于杭州湾北部（30°37''N~30°47''N，121°26''E~121°59''E）进行的张网调查数据，利用幂函数、相对体重和单因素方差分析等方法对其体长与体重关系、肥满度等进行研究。结果显示，安氏白虾的体长、体重组成均具有显著的季节变化特征，从春季至冬季，平均体长和平均体重均呈现逐渐下降的趋势，平均体长和平均体重的季节差异显著（P<0.05）。体长与体重关系参数a为条件因子，反映出安氏白虾种群所处环境的优劣，a值夏季最高，冬季最低，从春季到冬季呈现先升高后又逐渐降低的变化趋势，参数b为异速生长因子，可用来判断安氏白虾种群是否处于匀速生长，b值表现出与a值相反的变化趋势。协方差分析表明，安氏白虾体长与体重关系参数仅春季和夏季间无显著性差异（P>0.05），其余季节之间均存在显著性差异（P<0.05）。安氏白虾的肥满度从春季到秋季逐渐上升，秋季达到最高值，冬季又降至最低值。方差分析显示，春季和夏季间的肥满度无显著性差异（P>0.05），其余季节间肥满度均具有显著性差异（P<0.05）。研究表明，杭州湾北部安氏白虾体长与体重关系参数a和b具有显著的季节变化特征，并且这个变化受捕食关系、捕捞压力和环境因子等方面影响。
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| 关 键 词： | 安氏白虾 体长-体重关系 季节变化 杭州湾 |
| 收稿时间： | 2020/2/26 0:00:00 |
| 修稿时间： | 2020/5/13 0:00:00 |
Impact of seasonal changes on Palaemon annandalei length-weight relationships in northern Hangzhou Bay |
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| WANG Miao,ZHOU Xuan,HONG Bo,XU Kaid,ZHANG Yazhou.Impact of seasonal changes on Palaemon annandalei length-weight relationships in northern Hangzhou Bay[J].Journal of Fishery Sciences of China,2020,27(11):1325-1332. |
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| Authors: | WANG Miao ZHOU Xuan HONG Bo XU Kaid ZHANG Yazhou |
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| Institution: | Shanghai Fisheries Research Institute, Shanghai 200433, China;Key Laboratory of Sustainable Utilization of Technology Research for Fisheries Resources of Zhejiang Province, Marine Fishery Research Institute of Zhejiang Province, Zhoushan 316021, China |
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| Abstract: | Palaemon annandalei is a small commercial shrimp species in China. Palaemon annandalei is mainly distributed in the Yellow Sea, East China Sea, and western coast of the Korean Peninsula. Since P. annandalei is the dominant macroinvertebrate species in northern Hangzhou Bay, this species plays an important role in marine ecosystem balance in this area. Hangzhou Bay is a traditional feeding and spawning ground for many fishes, such as Collichthys lucidus and Coilia mystus. Palaemon annandalei is also one of the prey items of C. lucidus in nor-thern Hangzhou Bay, and is important for C. lucidus growth and breeding. Based on data from 12 set-net surveys in northern Hangzhou Bay in February, May, August, and November 2018, power function, relative body weight, one-way ANOVA, and covariance analysis were applied in this study to analyze the body length-weight relationships (LWR) and relative fatness of P. annandalei. The results showed that the impact of seasonal changes on P. annandalei body length and weight compositions was statistically significant. Mean body length and body weight decreased from spring to winter, and seasonal changes on P. annandalei mean body length and weight was statistically significant (P<0.05). The condition factor (a) of LWR was highest in summer and lowest in winter, and firstly increased, then decreased from spring to winter. The allometric factor (b) of LWR was highest in winter and lowest in summer, which presented opposite trends to a. Covariance analysis showed that a and b was not significantly different between spring and summer (P>0.05), and all the other seasons had significant differences between each other (P<0.05). The relative fatness of P. annandalei increased from spring to autumn, reaching a maximum in autumn, then decreased to the minimum in winter. A one-way ANOVA showed that relative fatness was not significantly different between spring and summer (P>0.05), and all the other seasons had significant differences between each other (P<0.05). The research indicated that seasonal changes on a and b of LWR of P. annandalei in northern Hangzhou Bay were statistically significant, and the changes on a and b of LWR was mainly affected by predation, fishing pressure, and environmental factors. |
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| Keywords: | Palaemon annandalei body length-weight relationship seasonal change Hangzhou Bay |
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