水产学报2025，Vol.49Issue(12)：149-161,13.DOI:10.11964/jfc.20230814101
低温下禁食时间对拟穴青蟹成长特性及可食部分营养成分的影响
Effects of different fasting durations on growth characteristics and nutrient composition of edible parts in Scylla paramamosain
摘要
Abstract
Fasting or starvation is a common method used in the cultivation of mud crabs(Scylla paramamosain)to regulate their substance and energy metabolism,achieve efficient wintering,and promote off-season sales.To explore the effects of fast-ing duration under low-temperature conditions on the growth and nutritional composition of S.paramamosain,a group of first-year female S.paramamosain were subjected to a fasting experiment at a water temperature of(14±1)℃.Samples were taken at 0,2,14,and 60 days of fasting to compare and analyze the impact of fasting duration on the nutritional composition of the edible parts(muscle and hepatopancreas)of the S.paramamosain.The results showed that,①under low-temperature condi-tions,fasting didn't lead to crab mortality and had no significant impact on weight,carapace length,width,and height.However,the hepatosomatic index and condition factor gradually decreased with increasing fasting duration(P<0.05).②Fast-ing didn't significantly affect the conventional nutritional components of the muscle,but the crude lipid content in the hepato-pancreas decreased significantly with fasting duration,while the moisture,crude protein,and ash content increased(P<0.05).③In terms of amino acid composition,17 amino acids were detected in both the muscle and hepatopancreas.Except for slight changes in the proportion of individual amino acids,the proportions of most amino acids remained stable.④During fasting,the S.paramamosain notably retained a high level of unsaturated fatty acids,such as 20:4n6(ARA)and 20:5n3(EPA),while the retention level of 22:6n3(DHA)was low.C16:0 and C16:1n were the main energy-providing substances.The results sug-gest that fasting significantly alters the nutritional composition of the hepatopancreas compared to muscle tissue,possibly by inducing the metabolism of fatty acids,particularly SFA,to provide sufficient energy.This indicates the vital role of SFA in the wintering of S.paramamosain,and supplementation before wintering may promote more efficient wintering,while post-winter-ing fat storage may require enhanced SFA nutritional supply.The study enriches our knowledge of energy and nutritional meta-bolism in S.paramamosain and provides a preliminary research foundation and theoretical basis for further studies on precise and efficient wintering and post-wintering fattening of S.paramamosain.关键词
拟穴青蟹/禁食/氨基酸/脂肪酸Key words
Scylla paramamosain/fasting/amino acids/fatty acids分类
水产学引用本文复制引用
姜扬,陈恩助,金润泽,季心平,王春琳,吴清洋..低温下禁食时间对拟穴青蟹成长特性及可食部分营养成分的影响[J].水产学报,2025,49(12):149-161,13.基金项目
浙江省"十四五"育种专项青蟹协作组项目(2021C02069-6) Key Scientific and Technological Grant of Zhejiang for Breeding New Agricultural Varieties(2021C02069-6) （2021C02069-6）
