PDF(Pubmed)
Abstract：
This study assessed variations in demersal fish assemblages with respect to the study site and water depth. Seasonal samplings from May 2018 to March 2019 were conducted along the northern (Ayajin, Goseong) and southern (Hupo, Uljin) sites of the East Sea off the Korean coast, using commercial gill nets. Samples were collected at depths of ~50, ~80, ~150 m across the study sites, with concurrent monitoring of water column structures. A total of 73 species and 6250 specimens were collected. Distinctive fish species compositions were observed according to the study site and depth. Although Glyptocephalus stelleri was the most abundant fish species in both Ayajin and Hupo, Gadus macrocephalus, Icelus cataphractus, and Alcichthys elongatus were most predominant in Ayajin, whereas Cleisthenes pinetorum, Hippoglossoides dubius, and Gymnocanthus herzensteini were more prevalent in Hupo. In terms of depth layer, in Ayajin, G. stelleri dominated in both intermediate and deeper layers, with Hemilepidotus gilberti, A. elongatus, Enophrys diceraus common in shallower depths. Conversely, in Hupo, G. stelleri, C. pinetorum, and A. nadeshnyi dominated across all depth layers, whereas Dasycottus setiger and G. herzensteini dominated in deeper and shallower depths, respectively. Significant influences of the study site and water depth on fish assemblage structures were observed due to variations in water temperature at the seasonal thermocline boundary.
摘要：
这项研究评估了海底鱼类组合相对于研究地点和水深的变化。2018年5月至2019年3月的季节性采样是在北部进行的(Ayajin，Goseong）和南部（Hupo，Uljin）朝鲜海岸东海遗址，使用商业刺网。在研究地点的~50、~80、~150米的深度收集样本，同时监测水柱结构。共收集73个物种和6250个标本。根据研究地点和深度观察到不同的鱼类物种组成。尽管石脑龙是Ayajin和Hupo中最丰富的鱼类，大头蛇,冰岛人，Alcichthyselongatus在Ayajin中最主要，而Cleisthenespinetorum，海马Dubius,和Gymnocanthusherzensteini在Hupo更为普遍。就深度层而言，在Ayajin,G.stelleri在中间层和深层都占主导地位，和Hemilepidotusgilberti在一起,A.elongatus,在较浅的深度常见的烯法瑞斯。相反，在Hupo,G.Stelleri,C.松果，纳德什尼在所有深度层中占主导地位，而Dasycottussediger和G.herzensteini在更深和更浅的深度占主导地位，分别。由于季节性温跃层边界处的水温变化，观察到研究地点和水深对鱼类组合结构的显着影响。
