生态学杂志2013，Vol.32Issue(2)：507-514,8.
多网目单层和三重组合刺网在岩礁和沙地生境中的鱼类采集效果比较
Efficiency of multi-mesh gillnets and multi-mesh trammel nets in collecting fish from rocky reef and sandy beach habitats
摘要
Abstract
In order to fully understand the efficiency of multi-mesh gillnets (MGN) and multi-mesh trammel nets (MTN) in collecting fish from soft bottom and hard bottom habitats, a 5 -day trial in the sandy beach (SB) and rocky reef (RR) habitats around Gouqi Island of East China was conducted in October 2011. The fish collection efficiency of MGN and MTN in SB and RR was compared from the viewpoints of fish composition, fish collection way, dominant fish compo-sition and their relative abundance, and fish diversity indices and community patterns. The fish species collected by MTN were five more in SB and eight more in RR, as compared with those collected by MGN. In SB, the dominant fish species collected by MGN were Sardinella zunasi and Larimichthys polyactis, while those collected by MTN were S. zunasi, L. polyactis, and Paraplagusia japonica; in RR, only Sebastiscus marmoratus and Hexagrammos agrammus were the dominant fish species collected by MTN, while two more dominant fish species, i. e. , Sardinella zunasi and L. polyactis, were collected by MGN. The fish collection ways of MTN and MGN differed. Most of the individuals collected by MGN both in SB and in RR were wedged, and only a small part of the individuals were gilled and entangled, whereas the percentages of gilled, entangled, and some other combined ways collected by MTN in the two habitats were increased significantly. In SB, the catch rates of S. zunasi and L. polyactis by MGN were signifi-cantly higher than those by MTN, while that of P. japonka was in contrary; in RR, MTN had higher catch rates of S. marmoratus and H. agrammus, while MGN indicated significantly higher catch rates than MTN. There were significant differences in the species diversity indices between the samples collected by MGN and MTN in SB, but no significant differences in RR. The cluster and ordination based on the abundance data indicated the significant differences in the fish com-munity structure between MGN and MTN both in SB and in RR. It was suggested that when col-lecting fish with gillnets, it needed to design suitable nets and methods to get comprehensive information on the real fish assemblages.关键词
刺网/多网目组合三重刺网/岩礁/沙地/鱼类群落Key words
gillnets/multi-mesh trammel nets/rocky reef/sandy beach/fish community分类
生物科学引用本文复制引用
汪振华,龚甫贤,吴祖立,毕远新,章守宇..多网目单层和三重组合刺网在岩礁和沙地生境中的鱼类采集效果比较[J].生态学杂志,2013,32(2):507-514,8.基金项目
博士科研启动基金项目和国家重点基础研究发展计划项目(2011CB111608)资助. （2011CB111608）
