Effects of parental age on offspring growth and survival in both wild and domesticated strains of bighead catfish(Clarias macrocephalus Günther,1864)  

作　　者：Thuy Yen Duong Thet Su Win Thi Ngoc Tran Nguyen 

机构地区：[1]College of Aquaculture and Fisheries,Can Tho University,Can Tho,920000,Viet Nam [2]International Master Program in Aquaculture,Course 4,Can Tho University,Can Tho,920000,Viet Nam

出　　处：《Aquaculture and Fisheries》2023年第2期141-147,共7页渔业学报（英文）

基　　金：This study was funded in part by the Can Tho University Improvement Project VN14-P6,supported by a Japanese ODA loan.

摘　　要：Understanding the relationship between fish parental age and offspring performance over their life cycle is crucial for aquaculturists.This study investigates the effect of parental age for both 1-and 2-year-old fish on the growth and survival rates of their larval to grow-out stages for two wild and domesticated strains of bighead catfish(Clarias macrocephalus).Fish were sampled from the Vietnamese Mekong Delta where wild adult fish were collected from a conservation area in Ca Mau Province and domesticated fish were taken from a hatchery in Can Tho.Four offspring treatments of 1-and 2-year-old broodstock strains were reared for 3 successive periods:40 days for fingerling rearing in static tanks with water exchange,60 days for juveniles,and 90 days for grow-out in recirculating systems.The final weight of fish at 190 days varied from 96.7 to 144.7 g.The growth of offspring was not affected by parental age(P>0.05),over the 3 rearing periods.However,the domesticated fish strain showed significantly better growth rates than the wild fish strain(P<0.05).Feed conversion ratios were comparable across fish treatments.Survival rates did not differ at the fingerling(21.8%-36.4%)and juvenile(69.0%-73.3%)stages.However,significant differences were found at the grow-out stage(69.3%-84.0%),with offspring from 2-year-old parents of both strains having greater survival rates.Overall,1-and 2-year-old fish appear to be suitable for bighead catfish breeders.

关 键 词：Parental age Clarias catfish Fish growth Strain evaluation Wild broodstock 

分 类 号：S917[农业科学—水产科学]