EXPERIMENTATION ON THE INTRODUCTION OF BLUNT-SNOUT BREAM INTO THE HWAMAHU LAKE

The famous blunt-snout bream (Megalobrama amblycephala Yih) was introducedinto the Hwamahu Lake first in 1960.It has been spawning regularly in the Lakesince then.But the survival rate of its fry seemed to be extremely low,and annualcatch of this fish soon dwindled to insignificance.Renewed effort to resume its yieldhas been made through mass release of fingerlings (8—11 cm in total length) intothe Lake year after year since 1972,with the result that its annual catch rapidly roseand hit a record of 20 tons in 1974,comprising 5 per cent of the gross yield of allfish.Method of induced spawning,hatchery management and growth rate of this fishin the Lake are given,and plans for further raising its production are suggested inthis paper.