Philippine national bangus (Chanos chanos) breeding program
1986
Lopez, N.A. | Vicaldo, M.V.E. | Trio, M.G. | Fadriquela, J.F. (Bureau of Fisheries and Aquatic Resources, Quezon City, Metro Manila (Philippines))
The National Bangus [milkfish] Breeding Program (NBBP) was implemented by the Bureau of Fisheries and Aquatic Resources in 1981 in twelve stations throughout the Philippines. Milkfish or bangus, Chanos chanos, broodstock were one-year-old juveniles either grown in ponds maintained by the project or purchased from cooperators. Some 250 juveniles were stocked in each of the 10-m diameter circular floating cages. The fish were fed commercial formulated diets (fish pellets) with 20% protein content at 1.5-2.0% of the body weight given twice daily until they were three years old. The broodstock were then given crustacean feed pellets with 42% protein level at 2-3 % body weight also given twice daily. Representative sampled specimens were sacrificed once the broodstock reached their 4th year to monitor gonadal development and to determine gonadosomatic indices (GSI). Early maturing fish were obtained in samples in March and August 1985. Initial fecundity counts showed a range of 660,000-1,100,000 eggs per female. These results were obtained in the third and fourth years at Regions 1 (Alaminos, Pangasinan), 3 (Masinloc, Zambales) and 11 (Sta. Cruz, Davao del Sur) [Philippines] stations. Samples at the other stations indicated a preponderance of developing to early maturing gonads
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