Sustainable fisheries in shallow lakes: an independent empirical test of the Chinese mitten crab yield model

Haijun Wang; Xiaomin Liang; Hongzhu Wang

doi:10.1007/s00343-017-6045-1

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Sustainable fisheries in shallow lakes: an independent empirical test of the Chinese mitten crab yield model

Updated：2023-05-16

- Sustainable fisheries in shallow lakes: an independent empirical test of the Chinese mitten crab yield model
- Journal of Oceanology and Limnology Vol. 35, Issue 4, Pages: 894-901(2017)
- Affiliations：
  
  State Key Laboratory of Freshwater Ecology and Biotechnology Institute of Hydrobiology Chinese Academy of Sciences
- Author bio：
- Funds：
- DOI：10.1007/s00343-017-6045-1
  CLC：
- Online First：12 August 2016，
  
  Published：2017
- Accepted：
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Wang, H., Liang, X. & Wang, H. Sustainable fisheries in shallow lakes: an independent empirical test of the Chinese mitten crab yield model., Chin. J. Ocean. Limnol. 35, 894–901 (2017). https://doi.org/10.1007/s00343-017-6045-1
DOI：

Wang, H., Liang, X. & Wang, H. Sustainable fisheries in shallow lakes: an independent empirical test of the Chinese mitten crab yield model., Chin. J. Ocean. Limnol. 35, 894–901 (2017). https://doi.org/10.1007/s00343-017-6045-1 DOI：

摘要

Abstract

Next to excessive nutrient loading

intensive aquaculture is one of the major anthropogenic impacts threatening lake ecosystems. In China

particularly in the shallow lakes of mid-lower Changjiang (Yangtze) River

continuous overstocking of the Chinese mitten crab (Eriocheir sinensis) could deteriorate water quality and exhaust natural resources. A series of crab yield models and a general optimum-stocking rate model have been established

which seek to benefit both crab culture and the environment. In this research

independent investigations were carried out to evaluate the crab yield models and modify the optimum-stocking model. Low percentage errors (average 47%

median 36%) between observed and calculated crab yields were obtained. Specific values were defined for adult crab body mass (135 g/ind.) and recapture rate (18% and 30% in lakes with submerged macrophyte biomass above and below 1 000 g/m2) to modify the optimum-stocking model. Analysis based on the modified optimum-stocking model indicated that the actual stocking rates in most lakes were much higher than the calculated optimum-stocking rates. This implies that

for most lakes

the current stocking rates should be greatly reduced to maintain healthy lake ecosystems.

关键词

Keywords

references

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