南方农业学报2024，Vol.55Issue(4)：1216-1224,9.DOI:10.3969/j.issn.2095-1191.2024.04.029
膨腹海马不同生长阶段的形态特征研究
Morphological characteristics of Hippocampus abdominalis at different growth stages
摘要
Abstract
[Objective]The special phenotypic traits and correlation at different growth stages of Hippocampus ab-dominalis were explored,and the main morphological traits affecting the quality of H.abdominalis at two-month-old were selected,which laid reference for the morphological study and artificial breeding of H.abdominalis.[Method]Ten-day-old and two-month-old artificial breeding H.abdominalis were randomly collected as the research objects.The pheno-typic traits including mandibular length(X1),maxillary length(X2),snout length(X3),eye diameter(X4),head length behind the eye(X5),head length(X6),trunk length(X7),tail length(X8),dorsal fin length(X9),body length(X10)and body weight(Y)were measured.The correlation of phenotypic traits and main development direction of 10-day-old and 2-month-old H.abdominalis were compared by correlation analysis and principal component analysis.The effects of main morphological traits on body weight of 2-month-old H.abdominalis were studied by path analysis and grey correlation analysis.[Result]Except for the insignificant correlation between mandibular length and dorsal fin length of 10-day-old H.abdominalis(P>0.05),the correlation coefficients of other traits at the two stages were significant(P<0.05)or ex-tremely significant(P<0.01,the same below).The focusing directions of principal component were different at different stages.From 10-day-old to 2-month-old H.abdominalis,the initial body length increased rapidly,the growth and deve-lopment of head and snout were obvious at first,and the growth of the trunk was focused in the later stage.Path analysis results of 2-month-old H.abdominalis showed that head length and body length were the main morphological traits affec-ting body weight.The largest direct effect on body weight was body length(0.763),while the largest indirect effect on body weight was head length through the body length(0.278).The regression equation(Y=-1.817+0.038X6+0.029X10)could accurately predict the change of body weight(F=127.556,P<0.01).The grey correlation analysis results showed that the main morphological traits with high correlation to body weight included trunk length,tail length,head length and body length,the corresponding correlation coefficients were 0.787,0.754,0.745 and 0.724 respectively.The results of different analysis methods were slightly different,but body length was found to be the main morphological traits with high correlation degree with body weight by all methods.[Conclusion]From 10-day-old to 2-month-old,the growth of H.abdominalis changes from head and snout to trunk.When using body weight as the target trait for 2-month-old H.abdomi-nalis breeding,body length is the main selection trait,while head length,trunk length and tail length can be collaborative selection.关键词
膨腹海马/形态性状/体质量/通径分析/灰色关联度分析Key words
Hippocampus abdominalis/morphological traits/body weight/path analysis/grey correlation analysis分类
农业科技引用本文复制引用
赵春暖,陈洋,王晓梅,于涛,单秀娟,任利群,郑言鑫,李波,李致远,王喜文..膨腹海马不同生长阶段的形态特征研究[J].南方农业学报,2024,55(4):1216-1224,9.基金项目
国家自然科学基金项目(42176151) （42176151）
中国水产科学研究院中央级公益性科研院所基本科研业务费专项(2022YJ02,2023TD69,2023TD12) National Natural Science Foundation of China(42176151) （2022YJ02,2023TD69,2023TD12）
Central Public-interest Scientific In-stitution Basal Research Fund,CAFS(2022YJ02,2023TD69,2023TD12) （2022YJ02,2023TD69,2023TD12）
