The Spatial and Temporal distribution of Larval Fish on theontinental shelf of the East China Sea in 2007 summer and008 winter
Date Issued
2009
Date
2009
Author(s)
Lin, Jyu-Pin
Abstract
To clarify the species composition and distribution of larval fish assemblages in the East China Sea, the larvae were sampled by vertical towing using ORI net fromuly 2007 and January 2008. Hydrological data were collected by CTD at the same time. CLUSTER, correlation analysis and BIO-ENV analysis were used to analyzehe communities of larval fish. Totally, 2300 larvae were identified to 193 taxa in 76 families, and the mean abundance was 1497.99 ± 2930.31 ind./100m². In summer, 8ominant taxa including Cynoglossus spp. (21.46%), Engraulis japonicus (13.28%), Gobiidae (9.33%), Auxis rochei (5.42%), Synodontidae (4.31%), Sciaenidae (2.49%),illago japonica (2.23%), and Serranidae (2.16%) constituted 62.64% of the fish larvae. In winter, 7 dominant taxa including Sebastiscus marmoratus (25.3%), Liza sp. (18.16%), Apogonidae (11.23%), Diaphus spp. (5.23%), Gobiidae (4.08%), Callionymidae (3.66%), and Myctophidae (2.13%) constituted 69.79% of the fisharvae. The abundance and species composition of the larvae were significantly different between summer and winter. The larval fish assemblages were clustered into summer and winter groups. That showed a high diversity in interface of two water masses in summer and winter. In summer, cluster characteristics of larval fish were mainly affected by the distribution of broodstock. In winter, fish larvae abundanceecreasing from southeast to northwest, which may be affected by temperature. In summary, the fish larvae were abundant in Yangtze River Basin and northern Taiwann summer, mostly contributed by Cynoglossus spp. and E. japonicus. In winter, the high abundance dominant with S. marmoratus and Liza sp. occurred in the Kuroshiopwelling area.
Subjects
larval fish
CLUSTER analysis
BIO-ENV
Kuroshio
Yangtze River
Type
thesis
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