辽东湾中国对虾标志放流及其增殖效果的研究

EXPERIMENTS ON TAGGING OF CHINESE PRAWN PENAEUS ORIENTALIS AND ITS RATE OF RECOVERY IN LIAODONG BAY

本文根据辽东湾中国对虾标志放流实验与重捕资料,对辽东湾中国对虾放流场的选择、种苗的放流规格和放流增殖效果进行了研究。根据上述实验分析表明,在辽河口海区进行对虾放流增殖是较理想的场所,在秋汛生产期洄游分布遍及辽东湾传统的中心渔场;放流种苗的适宜体长规格为5cm以上,回捕率较高,最高达3.31％。这将对辽东湾生产性对虾放流提供科学的依据。

Experiments of tagging and recovery of Chinese Prawn (Penaeusorientalis Kisninouye) were conducted in Liaodong Bay. Surveys were made undersuch topics as the choice of sites, the suitable size of seeding fry and the result ofrecovery rate through tagging. During the past three years, the total number of123,572 tagged prawns were released and the total recovery number was 1,233. Theresults showed that the mouth of Liao He River was an ideal site for releasing thetagged prawns. During the autumn harvest season, it was found that the migrationand distribution of the the prawn covered the traditional central fishing zones. Thetagged prawn was successfully recaptured in the spawning gorund and also in theoverwintering ground. The suitable body length of the fry for tagging is over 5 cm.In this case, the rate of recapture is higher, its best percentage being 3.31%. Thisstudy provides a scientific basis for the exploitation of production range of prawnreleasing in Liaodong Bay.