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Add To Calendar 28/04/2016 14:10:0028/04/2016 14:30:00Africa/JohannesburgAsian-Pacific Aquaculture 2016reproductive biology of Vermiculated Sailfin Catfish         VIP Room 2The World Aquaculture Societyjohnc@was.orgfalseanrl65yqlzh3g1q0dme13067DD/MM/YYYY

reproductive biology of Vermiculated Sailfin Catfish        

Peterygoplichthys disjunctivus (Weber, 1991) in the Mekong Delta, VIETNAM
 
Tran Dac Dịnh*, Ho Thi Thuy Huong and Dang Thuy Mai Thy
College of Aquaculture and Fisheries, Can Tho University, Vietnam
(*): Email: tddinh@ctu.edu.vn

Study on reproductive biology of Vermiculated Sailfin Catfish Pterygoplichthys disjunctivus (Weber 1991) in the Mekong Delta, South of Vietnam was carried out from April, 2013 to March, 2014. The results showed that the matured fish in stage IV and stage V was found in all year round, in which the highest ratio of maturation was determined in the period of April-September. Gonadosomatic Indexs (GSI) of males were lower than those of females, and GSI of female was high in the period of April-September and the highest value in June (7.98 %). Meanwhile, Hepatosomatic Index (HSI) was changed inversely with GSI and ranged from 0.78 to 1.47 %. The condition factor (CF) ranged from 3.08 % to 7.2 % and showed that CF was also higher from April to September. The results indicated that the main spawning season of P. disjunctivus occurred from April to September; however this species in the Mekong Delta can breed in all year round. The fecundity of P. disjunctivus ranged 252 to 5820 eggs/female and relative fecundity fluctuated from 2665 to 18092 eggs/kg of female. Length at first maturity (Lm) of female and male was 11.12cm and 9.14cm, respectively.

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