黄金鲈肌肉氨基酸组成与性别、体重、性腺系数间的关联性分析  

Correlation analysis of muscle amino acid composition with gender,body weight and gonad index in yellow perch(Perca flavescens)

作　　者：黄逸中 张思琪 颉志刚 HUANG Yizhong;ZHANG Siqi;XIE Zhigang(College of Life Science,Zhejiang Normal University,Jinhua 321004,Zhejiang;Institute of Hydrobiology,Zhejiang Academy of Agricultural Sciences,Hangzhou 310021,Zhejiang)

机构地区：[1]浙江师范大学生命科学学院,浙江金华321004 [2]浙江省农业科学院水生生物研究所,浙江杭州310021

出　　处：《浙江农业科学》2024年第10期2486-2494,共9页Journal of Zhejiang Agricultural Sciences

基　　金：浙江省科学技术厅公益技术应用研究国际合作项目(2017C34006)。

摘　　要：黄金鲈(Perca flavescens)两性间存在明显的生长异速现象,即雌鱼生长快于雄鱼。为探究该鱼肌肉氨基酸组成与性别、体重、性腺系数(gonadosomatic index,GSI)间的相关性,该研究测定了同一批孵化的二龄黄金鲈肌肉常规营养成分和17种氨基酸含量。结果表明,黄金鲈肌肉营养成分无性别差异,在氨基酸组成中仅组氨酸含量雄性高于雌性(P<0.05)。基于氨基酸评分(amino acids score,AAS),雌鱼第一限制氨基酸为异亮氨酸,而雄鱼为蛋氨酸+半胱氨酸;根据化学评分(chemical score,CS),雌雄鱼第一限制氨基酸均为蛋氨酸+半胱氨酸。经皮尔森相关性分析,发现雌鱼肌肉亮氨酸、异亮氨酸、赖氨酸含量与体重呈显著正相关(P<0.05),除甘氨酸、丙氨酸、半胱氨酸、组氨酸外,其余氨基酸含量均与GSI呈显著正相关(P<0.05)。通过线性回归分析,发现雌鱼人体必需氨基酸、鱼类必需氨基酸含量均与体重呈显著正相关,总氨基酸、呈味氨基酸含量也均与GSI具有显著正相关性(P<0.05)。然而,雄鱼肌肉相关氨基酸指标则与体重、GSI间无显著相关性。综上所述,养殖黄金鲈肌肉氨基酸组成的性别差异较小,同龄雌性生长快、体重大的个体,肌肉氨基酸营养价值相对较高并随GSI增加而提高,但同龄雄性肌肉氨基酸营养价值与体重、GSI间的相关性并不明显,甚至部分氨基酸指标有下降趋势。Yellow perch(Perca flavescens)displays noticeable allometric growth differences between genders,with the females exhibiting faster growth rates than the males.This study aimed to investigate the relationship between muscle amino acid composition and gender,body weight,and gonadosomatic index(GSI).The research involved analyzing the nutritional components and 17 amino acid contents of the muscle in a group of second-year yellow perch from the same hatching cohort.The findings indicated that there were no gender variations in the conventional nutritional components of Perca flavescens muscle,except for histidine content,which was significantly higher in the males compared with the females(P<0.05)among the amino acid composition.Upon amino acid assessment(AAS),isoleucine emerged as the first limiting amino acid in female fish,while methionine+cysteine served as the first limiting amino acid in the males.Both male and female fish had methionine+cysteine as the foremost limiting amino acid based on chemical scores(CS).Pearson correlation analysis demonstrated positive correlations between leucine,isoleucine and lysine levels in female fish muscle with body weight(P<0.05),as well as positive correlations between all amino acid contents except for glycine,alanine,cysteine,and histidine with GSI(P<0.05).Linear regression analysis revealed significant positive linear correlations between human essential amino acids,fish essential amino acids and body weight,as well as between total amino acids,umami amino acids and GSI in female fish(P<0.05).However,no significant correlations were found between muscle-related amino acid indicators in male fish and body weight or GSI.In summary,there is minimal gender disparity in the amino acid composition of cultured Perca flavescens muscle.The females of the same age,who exhibit faster growth and higher body weight,possess relatively greater muscle amino acid nutritional value,which escalates with GSI.Conversely,the relationship between muscle amino acid nutritional value and body weig

关 键 词：黄金鲈 氨基酸组成 性别 体重 性腺指数 肌肉 

分 类 号：S965.211[农业科学—水产养殖]