Fluctuations in abundance and species composition of fishes collected by gill net fisheries in coastal water of Yeosu, Korea

Abstract

Monthly variation in abundance and species composition of the fishes were investigated based on specimens collected by gill net in coastal water of Yeosu from October, 2009 and February, May, August, 2010. The collected fishes were 1,529 individuals (183,840g) of the total, identified into 6 orders, 16 families and 24 species. The most dominant order fish was Perciformes comprised 9 species, 7 families, and followed Pleuronectiformes comprised 5 species, 3 families, Scorpaeniformes comprised 5 species, 2 families. These 3 orders constituted 81.1% of the total collected fish. During the study, most dominant species was Hexagrammos otakii accounted for 189 individuals (12.4%) of the total, followed by by the each stations was 2.47~2.66 and the evenness index was 0.84~0.90 and the richness index 2.99~3.37. The similarity of community structure per season was very high which was the least in spring and fall. In addition, the community structure was very similar in state 3 and 2 out of each stations.

Environmental DNA Metabarcoding Analysis of Fish Assemblages and Phytoplankton Communities in a Furrowed Seabed Area Caused by Aggregate Mining

“…Upon comparison with the results obtained by traditional methods, the identified numbers of species are impressive. For instance, 44 and 25 species were observed by five repeats of bottom trawls and two uses of a gill net, respectively, in similar locations (Jeong et al, 2005;Oh et al, 2014). The number of species detected in this study was almost one-third of that by 3-year-long surveys (356 species), conducted in the southern sea of Korea using multiple traditional methods, including diving, various nets and trawls, and fish market surveys (Moon et al, 2015).…”