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- Title
Analysis on Growth of Released Black Carp and Annual Benefits from Released Fish in Yantan Reservoir.
- Authors
Yaoquan HAN; Anyou HE; Li HUANG; Jun SHI; Dapeng WANG; Weijun WU
- Abstract
The research explored growth and development, economic profits, and ecological benefits of released black carps on basis of 21 group ecological data on 52 365 fish within 6 months. The results indicated that the age and growth index of released black carp were normal and body length and size were coordinated; 88.89% released black carps exceeded theoretical weight, with an average of 25.15%, which indicated that black carps are hardly to reproduct naturally. In 2013, 310 000 black carps were released in the Reservoir, and 123 tons black carps were obtained, with direct economic value of 2.46 million yuan and indirect economic value of 3.84 million yuan. It can be concluded based on averages that 123 tons black carps can be produced in 2013 and 3 690 kg nitrogen and 740 kg phosphorus can be removed. The releasing of fish has shown much more economic, ecological and social benefits in Yantan Reservoir, but the hidden dangers still exist on fishery environment. Therefore, it is necessary to further increase the number of released black carps in the Reservoir.
- Subjects
CHINA; BLACK carp; SCIENCE; TECHNOLOGY; AGRICULTURAL chemicals
- Publication
Agricultural Science & Technology, 2015, Vol 16, Issue 11, p2526
- ISSN
1009-4229
- Publication type
Article