Effects of parental age on offspring growth and survival in both wild and domesticated strains of bighead catfish(Clarias macrocephalus Günther,1864)
作者机构：College of Aquaculture and FisheriesCan Tho UniversityCan Tho920000Viet Nam International Master Program in AquacultureCourse 4Can Tho UniversityCan Tho920000Viet Nam
出 版 物：《Aquaculture and Fisheries》 (渔业学报（英文）)
年 卷 期：2023年第8卷第2期
页 面：141-147页
核心收录：
基 金：This study was funded in part by the Can Tho University Improvement Project VN14-P6 supported by a Japanese ODA loan
主 题：Parental age Clarias catfish Fish growth Strain evaluation Wild broodstock
摘 要：Understanding the relationship between fish parental age and offspring performance over their life cycle is crucial for *** 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 *** 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 *** final weight of fish at 190 days varied from 96.7 to 144.7 *** growth of offspring was not affected by parental age(P0.05),over the 3 rearing ***,the domesticated fish strain showed significantly better growth rates than the wild fish strain(P0.05).Feed conversion ratios were comparable across fish *** rates did not differ at the fingerling(21.8%-36.4%)and juvenile(69.0%-73.3%)***,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 ***,1-and 2-year-old fish appear to be suitable for bighead catfish breeders.
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