Abstract: The effect of elver nets on fishery resources in coastal waters was investigated by monthly sampling monitoring survey in areas of Dongtai, Rudong, Qidong and Haimen in Jiangsu Province from February 2016 to May 2016.The 144 net survey showed that 14 861 individual larvae of nektons were collected, representing 75 species belonging to 64 genera, 45 families, and 18 orders by 137 casting nets, including 51 species of fish in 29 families; 21 species of crustaceans in 13 families; 3 species of cephalopods in 3 families, with the dominant species of Leptochelagracilis, Palaemongravieri and Alpheusjaponicas.There are 34 species of economic species in bycatch, accounting for 45.33% of total species number, with little difference in the number of species in various months and regions.However, the average density was shown to be varies greatly, with the maximal monthly average density in May(146.27 ind./net),and in Dongtai (205.85 ind./net), and the minimal in February(46.38 ind./net)and in Haimen(31.33 ind./net).There are different dominant species in different regions, with dominant species Protosalanxhyalocranius in Dongtaiis, Palaemongravieri in Rudong, Portunustrituberculatus in Qidong, and Coiliamystu in Haimen.The damage rate of eel harvesting and fishery resources was estimated to be 158.10, especially high in March and May, and in Rudong and Dongtai sea area.Based on the calculation of the economic loss of the larvae, the economic loss value of larvae per larva catch was estimated to be 40.60 yuan, indicating that the fixed net of the seedlings led to some damage to the early fishery resources in the coastal waters of Jiangsu Province.
2019, Vol. 34 
