journal6 ›› 2010, Vol. 31 ›› Issue (1): 104-109.

• Biological resources • Previous Articles     Next Articles

 Investigation of  Enhancement and Releasement Effect ofFishery Stock in Gaoqiao Mangrove


  1. (1.Fisheries College of Guangdong Ocean University,Zhanjiang 524025,Guangdong China;2.Zhanjiang Ocean and Fishery Administration,Zhanjing 524088,Guangdong China;3.Head Office of Zhanjiang Mangrove National Nature Reserve,Zhanjiang 524088,Guangdong China)
  • Online:2010-01-25 Published:2012-04-19

Abstract: 50 000 mono-sex individuals of Nile tilapias were released in the mangrove area of Hongkan and Bohe to evaluate the  releasing effects on the fishery resources.By fixed point sampling survey,both the current year catch and diversity increased after releasement but both declined in the regions without releasement;the number of commercial  fishes increased after releasement;the released mono-sex(male) Nile tilapias didn’t  propogate,and they just swimmed about in certain regions.After released,Nile tilapias accounted for 32% of the total number and 36.2% of gross weight in fish harvest.The survival rate of released Niles tilapia was 72%.The saccumulated growth rate of Niles tilapias was 23.25 g/month.A regression combined analysis of the two results above,some parameters were calculated:K=0.242 6,L∞=21.565 13 cm,t=9.24 months,W∞=155.84 g.Preliminary effect of releasement is achieved.

Key words: monosex tilapia;enhancement and releasement, resources of fishery, catch of fishing, effect

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