울진바다목장에서 형망으로 어획된 수산자원의 군집구조
Community Structure of Fisheries Resources Caught by Dredge in the Uljin Marine Ranching Area, Korea
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초록
To elucidate the variation of species composition, biomass and size distribution of fishery resource in the Uljin marine ranching area was investigated at the 4 stations from 2009 to 2010 based on the dredge sampling. During the survey period, a total of 41 fishery resource species were sampled with a mean density of 2,554,633 ind./km2 and mean biomass was 32,946 kg/km2. A total 36 fishery resource species were sampled with a mean density of 3,198,793 ind./km2 and mean biomass 41,177 kg/km2 in 2009 and it were sampled a total 31 species, mean 1,910,473 ind./ km2 and 24,716 kg/km2 in 2010. The major individual-dominant species, occupying over 1% of total individuals, were Gomphina veneriform i s (2,491,818 ind., 82.2%), Umbonium costatum (221,973 ind., 8.7%), Mactra chinensis (49,879 ind., 2.0%), Glossaulax didyma hayashii (49,879 ind., 1.9%), Blepharipoda liberate (37,714 ind., 1.5%) and Paguridae spp. (27,266 ind., 1.1%). The major biomass-dominant species, occupying over 1% of total biomass, were G. veneriform i s (25,124 kg, 76.3%), G. didyma hayashii (2,596 kg, 7.9%), M. chinensis (2,024 kg, 6.1%), Ovalipes punctatus (921 kg, 2.8%) and Glossaulax didyma didyma (567 kg, 1.7%). From the cluster analysis based on BrayCurtis similarity matrix of fourth root transformed data of species number and individuals was divided into 2 different groups of the fishery resource community (Group A-St.1, Group B-Sts. 2, 3, 4). The 2009 and 2010 mean Shell length (mm) of G. veneriform i s was 37.73 mm, 29.76 mm and M. chinensis was 62.03 mm, 44.94 mm, respectively.
Abstract
To elucidate the variation of species composition, biomass and size distribution of fishery resource in the Uljin marine ranching area was investigated at the 4 stations from 2009 to 2010 based on the dredge sampling. During the survey period, a total of 41 fishery resource species were sampled with a mean density of 2,554,633 ind./km2 and mean biomass was 32,946 kg/km2. A total 36 fishery resource species were sampled with a mean density of 3,198,793 ind./km2 and mean biomass 41,177 kg/km2 in 2009 and it were sampled a total 31 species, mean 1,910,473 ind./ km2 and 24,716 kg/km2 in 2010. The major individual-dominant species, occupying over 1% of total individuals, were Gomphina veneriform i s (2,491,818 ind., 82.2%), Umbonium costatum (221,973 ind., 8.7%), Mactra chinensis (49,879 ind., 2.0%), Glossaulax didyma hayashii (49,879 ind., 1.9%), Blepharipoda liberate (37,714 ind., 1.5%) and Paguridae spp. (27,266 ind., 1.1%). The major biomass-dominant species, occupying over 1% of total biomass, were G. veneriform i s (25,124 kg, 76.3%), G. didyma hayashii (2,596 kg, 7.9%), M. chinensis (2,024 kg, 6.1%), Ovalipes punctatus (921 kg, 2.8%) and Glossaulax didyma didyma (567 kg, 1.7%). From the cluster analysis based on BrayCurtis similarity matrix of fourth root transformed data of species number and individuals was divided into 2 different groups of the fishery resource community (Group A-St.1, Group B-Sts. 2, 3, 4). The 2009 and 2010 mean Shell length (mm) of G. veneriform i s was 37.73 mm, 29.76 mm and M. chinensis was 62.03 mm, 44.94 mm, respectively.
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