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Study on Fishery Biology in the Northern East China Sea

Author: WangLin
Tutor: MiaoZhenQing
School: Zhejiang Ocean University,
Course: Fishing Technology
Keywords: he northern East China Sea species fishery biology
CLC: S917.4
Type: Master's thesis
Year: 2013
Downloads: 25
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Abstract


Based on data from ‘investigation and monitoring of the stow nets’ fishing and its research ofmanagement countermeasures in Zhejiang Province’ which was developed in2011, made theopen-sea waters of the middle-northern East China Sea (30°00′N~33°30′N,123°00′E~126°30′E) asthe study sea area. The characteristics of fishery community structure and diversity were studied,and so as the composition of dominant species in different seasons,the abundance and biomassdistribution of the catch and the basic biological features of main species according to the analysisand determination of samples.The main results were shown as follows:(1)97fishery organism were captured in the study sea area,65species of fishes,22species ofcrusracea,10kinds of cephalopoda were included.And there are40warm-water species,50warm-temperate species and7cold-temperate species in fishery biological species that trapped.The area influenced by the Kuroshio current and its branches, mainly in warm-water species andwarm-temperate species.(2) The species that the relative importance index greater than500were defined as dominantspecies in this study. The dominant species appeared in spring were Engraulis japonicus,Sepiolabirostrata, Ovalipes punctatus, Pseudosciaena polyactis, Trichiurus haumela, and Pseudosciaenapolyactis, Benthosema pterotum, Harpodon nehereus, Trichiurus haumela, Apogonichthys lineatus,Trachypenaeus curvirostris, Chelidonichthys kumu, Collichthys lucidus, Setipnna taty in autumn,Leptochela gracilis, Benthosema pterotum, Engraulis japonicus, Ovalipes punctatus in winter.(3) The composition of body length and body weight were analyzed, the result shows:Manifestation of tendency of low age of the catch of Trichiurus haumela and Pseudosciaenapolyactis and miniaturization of biological signs are increasingly intensifying.This thesis accords the research of the fishery biology structure, not only reflects the marineecosystem status in the northern East China Sea, but also provides the scientific information tofishery management.

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CLC: > Agricultural Sciences > Aquaculture, fisheries > Aquatic basic science > Aquatic Biology > Aquatic Zoology
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