Biodiv Sci ›› 2001, Vol. 09 ›› Issue (1): 85-89.  DOI: 10.17520/biods.2001013

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Status and sustainable utilization of fishery resources of Selincuo Lake ,northern Tibet

CHEN Yi-Feng1 ,HE De-Kui1 ,CAI Bin2   

  1. 1 Institute of Hydrobiology , Chinese Academy of Sciences , Wuhan  430072
    2 The Bureau of Aquatic Products , Xizang Autonomous Region , Lasa  850000
  • Received:2000-06-05 Revised:2000-10-01 Online:2001-02-20 Published:2001-02-20
  • Contact: CHEN Yi-Feng

Abstract: Selincuo Naked Carp ( Gymnocypris selincuoensis ) is the only fish species distributed in Selincuo Lake. Little had been known before we studied its biological characters since 1997. Based on its age composition , growth rate , feeding , reproduction and stock structure , the present paper int roduced the fishery history of Selincuo Lake and discussed the relationship between fishery catch and minimum catchable age , fishing mortality , mesh size and optimal sustainable yield. To get sustainable economic profits , exploitation of fishery resources of Selincuo Lake must focus on stability of lake ecosystem , and thus maintain a sufficient recruitment population of Selincuo Naked Carp. Because of the ext reme environment condition on the Tibetan Plateau and special biological characters of Selincuo Naked Carp , the model of maximum sustainable fish yield suitable for temperate zones can not be adopted in Selincuo Lake. The total allowed catch should be taken at anoptimal fishing mortality of F0. 2 . Finally , we put forward eight strategies for sustainable development of fishery as follows : 1) because of the characteristics of growth and reproduction of Selincuo Naked Carp and the climatic conditions of northerb Tibet Plateau , fishing season in Selincuo Lake should be condensed to winter season ; 2) according to present studies , the annual fishery yield of Selincuo Naked Carp can be increased from 700 ton to 2000 ton in Selincuo Lake ; 3) studies on population dynamics of Selincuo Naked Carp becomes more important when its annual yield rises ; 4) the catchable individuals should be elder than 12 years of age , longer than 290 mm and weightier than 350 g ; 5) the individuals harbouring tapeworms should be sorted out for producing indust rial fishmeal ; 6) promote the consumption of aquatic products of local people so as to maintain a economic profit ; 7) int roduction of exotic fish species should be st rictly limited , and 8) management of fishery production of Selincuo Lake should be improved.