Monsoon-driven succession of the larval fish assemblage in the East China Sea shelf waters off northern Taiwan |
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Authors: | Hung-Yen Hsieh Wen-Tseng Lo Long-Jing Wu Dong-Chung Liu Wei-Cheng Su |
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Institution: | (1) Coastal and Offshore Resources Research Center, Fisheries Research Institute of the Council of Agriculture, Executive Yuan, Kaohsiung, 80672, Taiwan;(2) Institute of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan;(3) Fisheries Research Institute of the Council of Agriculture, Executive Yuan, Keelung, 20246, Taiwan; |
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Abstract: | The seasonal variation in the larval fish community related to the hydrography in the East China Sea (ECS) off northern Taiwan
was studied from February to November 2004. Hydrographic conditions in the southern ECS are strongly influenced by the different
water masses due to the seasonal monsoon system. A total of 173 taxa of larval fish belonging to 68 families and 105 genera
were identified during the study period. The highest abundance of larval fish was recorded in winter, a moderate abundance
was seen in late spring and summer, and the lowest abundance in autumn. Significantly higher abundances were usually found
in the mixing zone than in ECS and the Kuroshio Current, and the number of species of larval fish was greater during the warm
period than during the cold period. The larval fish fauna in the southern ECS is a mixture of endemic and exotic species;
the latter come from the coastal waters of mainland China when the northeasterly monsoon prevails, from the South China Sea
during the southwesterly monsoon, and from the Kuroshio waters year-round. The succession of water masses induced by the monsoon
systems and the high nutrient levels caused by frontal turbulence and topographic upwelling may determine the distributions
of larval fish in terms of abundance and composition. |
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