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금강 수서생태계의 구조와 기능에 관한 연구 : 담수어류
방성자,최신석,홍영표 忠南大學校 環境問題硏究所 1995 環境硏究 Vol.13 No.-
The freshwater fish fauna in mid-lower area was investigated from March 1995 to October and its community structure was analyzed. 1. The collected fishes were classified 39 species belonging to 5 subfamilies 12 families, of which 24 species were Cyprinus family. 2. Dominant species was Hemibargus longirostris in March, Mugil cephalus in May, Culter eingenmanni in August, Microphysogobio tuntingensis in October. 3. 9 species of total collected fish were Korea endemic species and subspecies that they were Acheilognathus yamatsutae, Acanthorhodeus gracilis, Gnathopogon strigatus, Squalidus japonicas, Microphysogobio yaluensis, Culter eigenmanni, Cobitis choii, Odontobutis odontobutis interrupta. 4. In investigated stations dominant species was Sarcocheilichthys wakiyae in the site 1, Sualidus japonicas in the site 2, Erythroculter erythropterus in the sit 3, Opsariichthys bidens in the site 4, Culter eingenmani in the site 5, Mugil cephalus in the site 6. 5. In investigated stations protective species was Sarcochilichthys wakiyae, S. curriculus, Acheilognathus rhombea. 6. As a result community analysis, species diversity and species richness were in the highest value in the site 1, community structure was stable. Dominance index was in the highest value in the site 6 because Mugil cephalus was 41% of the total collected species in the same site, and species diversity was in the lowest value.
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만경강 유역의 수질, 토양 및 어류의 중금속 함량에 관한 연구
방성자,최신석 忠南大學校環境問題硏究所 1993 環境硏究 Vol.11 No.-
This study was performed to investigate the heavy metals contents in water, sediment and muscle and skeleten of fish in the Mankyunggang areas. The samples wers collected at 4 sites of the Mankyunggang during the period of May to October in 1993. The concentrations of the heavy metals were analyzed by the atomic absorption spectrophotometer : The results are as follows. 1. The average concentrations of the heavy metals in water was detected Cadmium 0.0171±0.0021㎍/g, Copper 0.0503±0.005㎍/g, Mercury 0.0422±0.0030㎍/g, Zinc 0.1008±0.0024㎍/g, and the concenfration of Zinc among the heavy metals was the highest. In the heavy metals concentrations, the sites sampled showed a higher tendency in lowerstreams than in up-streams. 2. The average concentrations of the heavy metals in sediment were Cadmium 0.0061±0.0006㎍/g, Copper 0.0328±0.0016㎍/g, Mercury 0.0022±0.0002㎍/g, Zinc 0.1479±0.0102㎍/g, and the concentration of Zinc was the highest value. In the heavy metals concentrations, the sites sampled showed a higher tendency in lowerstreams than in up-streams. 3. The average concentrations of Cadimium, Copper, Mercury, Zinc in muscle and skeleton of fish at Mankyunggang were Cadmium 0.0233±0.0012㎍/g, 0.1289±0.0019㎍/g, Copper 0.0962±0.0027㎍/g, 0.1401±0.0034㎍/g, Mercury 0.0600±0.0090㎍/g, 0.3787±0.0031㎍/g, Zinc 1.6002±0.027㎍/g, 3.5372±0.1366㎍/g. 4. The concentrations of Cadmium, Copper, Mercury and Zinc in muscle and skeleton of fish were higher in skeleton than in muscle, and significant difference in the part of each species except Mercury(p<0.01). The average concentrations of the heavy metals in fish showed higher in lowersteams than in up-streams.
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