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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2008.1
- 수록면
- 15 - 22 (8page)
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초록· 키워드
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Excessive growth of phytoplankton is a common and severe problem in intensively farmed pangasiid catfish (Pangasius hypophthalmus) culture ponds. It can lead to cyanobacterial blooms, reduced fish growth, bad-tasting fish flesh, and lower market demand. To investigate how to manage undesirable phytoplankton growth, we evaluated three stocking strategies in nine rural fishponds (0.020-0.022 ha) owned by various farmers: a pangasiid catfish monoculture (treatment 1, T1), and pangasiid catfish-silver carp (Hypophthalmichthys molitrix) polycultures at two stocking ratios of 1:1 (treatment 2, T2) and 2:1 (treatment 3, T3). The total density of all ponds was approximately 30,000 fishes/ha. Monoculture (T1) resulted in significantly higher (p < 0.05) nutrient levels (nitrate and phosphate) in ponds than did polyculture (T2 and T3). Nutrient loads increased with culture time, resulting in increased growth of phytoplankton, including Cyanophyceae (9 genera), Chlorophyceae (15 genera), Bacillariophyceae (8 genera), and Euglenophyceae (3 genera). The introduction of silver carp as a co-species helped to regulate phytoplankton growth and to improve the water quality of pangasiid catfish culture ponds.
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참고문헌 (25)
참고문헌 신청
Barica,J / 1975 / Collapse of algal blooms in Prairie pothole lakes: their mechanism and biological impact / Verhandlungen des Internationalen Verein Limnologie 19 : 606 ~ 61
Bellinger, E.G / 1992 / A Key to Common Algae: Freshwater, Estuarine and Some Coastal Species / The Institution of Water and Environmental Management : 1 ~ 138
Bold, H.C / 1978 / Introduction to the Algae / Prentice-Hall
Boyd, C.E / 1990 / Water Quality in Ponds for Aquaculture. Alabama Agricultural Experiment Station / Auburn University, Alabama : 1 ~ 382
Boyd,C.E / 1985 / Chemical budgets for channel catfish ponds / Transactions of the American Fisheries Society 114 : 291 ~ 298
Bellinger, E.G / 1992 / A Key to Common Algae: Freshwater, Estuarine and Some Coastal Species / The Institution of Water and Environmental Management : 1 ~ 138
Bold, H.C / 1978 / Introduction to the Algae / Prentice-Hall
Boyd, C.E / 1990 / Water Quality in Ponds for Aquaculture. Alabama Agricultural Experiment Station / Auburn University, Alabama : 1 ~ 382
Boyd,C.E / 1985 / Chemical budgets for channel catfish ponds / Transactions of the American Fisheries Society 114 : 291 ~ 298
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