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[1]张顺,胡忠军,陈丽平,等.基于刺网的淀山湖鱼类群落结构时空变化及网目大小对其产生的影响[J].应用与环境生物学报,2019,25(04):877-884.[doi:10.19675/j.cnki.1006-687x.2018.11035]
 ZHANG Shun,,et al.Temporal and spatial variations in fish community structure in Dianshan Lake and the effect of mesh size on its structural characteristics[J].Chinese Journal of Applied & Environmental Biology,2019,25(04):877-884.[doi:10.19675/j.cnki.1006-687x.2018.11035]
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基于刺网的淀山湖鱼类群落结构时空变化及网目大小对其产生的影响
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
25卷
期数:
2019年04期
页码:
877-884
栏目:
研究论文
出版日期:
2019-08-25

文章信息/Info

Title:
Temporal and spatial variations in fish community structure in Dianshan Lake and the effect of mesh size on its structural characteristics
作者:
张顺;?胡忠军;?陈丽平;?刘其根;?伍和星;?陈立侨
1上海海洋大学水产科学国家级实验教学示范中心 上海 201306 2上海海洋大学农业部淡水水产种质资源重点实验室 上海 201306 3上海海洋大学农业部鱼类营养与环境生态研究中心 上海 201306 4上海海洋大学水产动物遗传育种中心上海市协同创新中心 上海 201306 5华东师范大学生命科学学院 上海 200062
Author(s):
ZHANG Shun1;? 2;? 3;? 4;? HU Zhongjun1;? 2;? 3;? 4**;? CHEN Liping1;? 2;? 3;? 4;? LIU Qigen1;? 2;? 3;? 4;? WU Hexing1;? 2;? 3;? 4 & CHEN Liqiao5
1 National Experimental Teaching Demonstration Center of Aquatic Science, Shanghai Ocean University, Shanghai 201306, China 2 Ministry of Agriculture Key Laboratory of Freshwater Fisheries Genetic Resources, Shanghai Ocean University, Shanghai 201306, China 3 Center for Fish Nutrition and Environmental Ecology, Ministry of Agriculture, Shanghai Ocean University, Shanghai 201306, China 4 Shanghai Collaborative Innovation for Aquatic Animal Genetics and Breeding, Shanghai Ocean University, Shanghai 201306, China 5 School of Life Science, East Normal University, Shanghai 200062, China
关键词:
多网目刺网;?鱼类群落;?物种组成;?大小结构;?单位努力渔获量;?季节变化;?气温
Keywords:
multi-mesh gillnet;? community of fishes;? species composition;? size structure;? catch per unit effort;? seasonal variation;? air temperature
分类号:
Q959.408
DOI:
10.19675/j.cnki.1006-687x.2018.11035
摘要:
为分析淀山湖鱼类群落结构的时空差异,探讨月平均气温对物种数以及网目大小对鱼类群落物种组成、大小结构和单位努力捕获量的影响,于2009-2010年采用多网目单层刺网对该湖鱼类进行月份调查. 在淀山湖共采集到鱼类28种,隶属于6目8科,其中刀鲚和斑条鱊为优势种. 鱼类群落物种组成、单位努力捕获量均无显着空间差异,但在时间上呈现显着差异:1月鱼类物种组成显着不同于其他月份,冬季的单位努力捕获数量(NPUE)显着低于夏秋季,单位努力捕获重量(BPUE)显着低于其他3个季节,每月捕获物种数与月平均气温呈二次多项式函数关系. 网目大小显着影响渔获物物种组成和大小结构,2、4、6、8 cm网目网片渔获物聚为一类,10 cm和12 cm网目网片渔获物分别单独聚为一类,斑条鱊、刀鲚、红鳍鲌、鲤、鲢为主要分歧种;2-10 cm网目网片渔获物的大小结构与12 cm网目网片存在显着差异,主要分歧体长组为10-15 cm和40-45 cm. 渔获物物种数有随着网目规格增加而呈下降的趋势,NPUE随网目大小增加而呈指数式下降,但BPUE与网目规格无显着函数关系. 为对湖泊鱼类群落结构特征进行更加科学地估计,刺网需要增加小网目网片,并与其他网具结合进行调查. (图7 表4 参40)
Abstract:
Our study aimed to analyze the spatial and monthly differences in fish community structure of Dianshan Lake. We explored the effect of monthly mean air temperature (MMAT) on fish species number. The effect of mesh size on species composition, size structure, and catch per unit effort (CPUE) were also investigated. From 2009 to 2010, using multi-mesh monolayer gillnets, monthly sampling of fishes was conducted at six stations. Using PRIMER 5.0, cluster analysis (CA), and non-metric multidimensional scaling (NMDS), spatial and monthly differences in the fish composition of Dianshan Lake and the effect of mesh size on species composition and size structure of fish assemblages were analyzed. Two-way analysis of variance was used to test for seasonal and spatial differences in CPUE. The best models for describing relationships between species number and MMAT, and between CPUE and mesh size were selected. A total of 28 fish species were collected. They belonged to six orders and eight families. The dominant species were Coilia nasus and Acheilognathus taenianalis. There were no significant spatial differences in fish species composition and CPUE, but these parameters differed significantly between seasons. The fish species composition in January was significantly different from that in other months. The number per unit effort (NPUE) in the winter was significantly lower than those in the summer and autumn. The biomass per unit effort (BPUE) in winter was significantly lower than those in the other three seasons. The species number caught per month varied as a quadratic polynomial function of MMAT. Species composition and size structure of catches were significantly influenced by mesh size. The catches collected by nets with a mesh size of 2, 4, 6, and 8 cm, 10 cm, and 12 cm clustered into three assemblages, respectively. They were separated by indicator species like A. taenianalis, C. nasus, Chanodichthys erythropterus, Cyprinus carpio, and Chanodichthys erythropterus. The size structure differed significantly between catches sampled with 2-10 cm mesh-size nets and those sampled with 12 cm mesh-size nets. They were divided by indicator body length class of 10-15 cm and 40-45 cm. With the increasing mesh size, cumulative species number tended to decrease and NPUE declined exponentially. However, BPUE showed no significant correlation with mesh size. In order to make a more reliable estimation of the fish community structure of the lakes, we recommend the addition of nets with mesh size less than 2 cm into the multi-mesh monolayer gillnet and combined utilization with other fishing gears.

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更新日期/Last Update: 2019-08-25