In recent years, Lushunkou District has constantly enhanced the breeding and releasing of fish, especially highlighting the research on the corresponding effect so as to further scientize, systemize and standardize the breeding and releasing of fish and ensure that relevant work can improve the livelihood and marine environment.
In recent days, 10 thousand fluorescently-labelled baby bastard halibuts and 30 thousand baby snakeheads have been released to the sea area surrounded by artificial fish reef near Chenjia Village, Tieshan Street, Lushunkou District. Lushunkou has become the first area in Dalian to conduct the research of re-catch rate on the effect of breeding and releasing of fish by means of artificial labelling. This experiment will provide scientific data for the construction of marine ranches and the effect of breeding and releasing of fish.
Bastard Halibut is a common fish in Dalian and also one of the major released fishes in Lushunkou District. With small scope of breeding migration, bastard halibut is usually released to sea areas with reef. Big baby bastard halibuts, 8 to 12 cm in length, are chosen and labelled for release with fluorescent agent injected into the skin on the side without eyes, thus forming a fluorescent label that can be distinguished with naked eyes and fluorescent flashlight. After baby snakeheads grow up and migrate to the bank, their fins will be cut off and compared with those of parent fish through DNA genetic breeding for research on releasing effect. The research on re-catch rate is expected to be carried out in July or August next year.
The releasing experiment of labelled bastard halibuts and the successful breeding and releasing of snakeheads will increase the type of fishes for breeding and releasing, improve the accuracy of effect evaluation and provide scientific data and offspring resources for the further breeding and releasing of fish.