Stock distribution and community structure of members in Gobioidei in Laizhou Bay
ZHANG Liang-cheng;LI Fan;LU Zhen-bo;XU Bing-qing
College of Marine Science,Shanghai Ocean University, Shanghai 201306, China;Shandong Provincial Key Laboratory of Restoration for Marine Ecology,Shandong Marine Resource and Environment Research Institute, Yantai 264006, China;Institute for Advanced Research of Coastal Ecology, Ludong University, Yantai 264006, China
Abstract: Species composition, seasonal distribution and community structure of gobies in Gobioidei were investigated in samples collected at 20 sites in Laizhou Bay area(37°12′N-37°40′N, 119°05′E-120°00′E) by beam trawls in May, August, October, and December of 2011 in order to evaluate the population composition and resource composition of Gobioidei in Laizhou Bay. There were 12 species in suborder Gobioidei, belonging to 9 genera, most of the warm-temperature estuarine species found in Yellow River Estuary where the water depth was less than 10 m. The volumes of Chaeturichthys stigmatias and Acanthogobius ommaturus were shown to account for 97.4% of the weight of these Gobioidei, with the maximal weight density and numerical density of Gobioidei in summer and the minimal values in spring. In winter, most fishes left Laizhou Bay for the warm water, and Gobioidei represented a large part of the fishes in weight density and numerical density in Laizhou Bay. CLUSTER analysis showed that the community structure of Gobioidei was divided into three groups in the similarity of 66%: the Tridentigertri gonocephalus group(Group One)at stations L11, L16, and L18, the north Laizhou Bay group(Group Two) at stations L03, L04, L05, L06, L09, and L19, and the west and south-central Laizhou Bay group(Group Three) at stations L01, L02,L07, L08, L10, L12, L13, L14, L15, L17, and L20. ANOSIM revealed that there were significantly different species compositions in the three groups(P<0.05), with very significant difference(P<0.01) between Group Three and Group One, and Group Three and Group Two. SIMPER analysis showed that Chaeturichthys stigmatias and Acanthogobius ommaturus had a significant influence on each group and that the species with small biomass or a few number in certain station had influence on every two group.
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2019, Vol. 34 
