Path analysis of desirable traits and evaluation of reproductive performance of Crassostrea sikamea in different ages  

作　　者：Guangqiu Chang Sheng Liu Hongqiang Xu Minhai Liu Zhihua Lin Qinggang Xue 

机构地区：[1]National Demonstration Center for Experimental Fisheries Science Education,Shanghai Ocean University,Shanghai,201306,China [2]Ninghai Institute of Mariculture Breeding and Seed Industry,Zhejiang Wanli University,Ninghai,Zhejiang Province,315604,China [3]Key Laboratory of Aquatic Germplasm Resources of Zhejiang,Zhejiang Wanli University,Ningbo,315100,China

出　　处：《Aquaculture and Fisheries》2024年第2期164-171,共8页渔业学报（英文）

基　　金：supported by grants from the“3315”Innovative Team of Ningbo City,the Science and Technology Planning Project of Ningbo City(2021S009).

摘　　要：Kumamoto oysters(Crassostrea sikamea)are important marine aquaculture shellfish because of their taste and round shell shape.Due to its small size,selective breeding is required to improve its market size,but there are no reports on traits suitable for direction selection and reproductive productivity of Kumamoto oysters of different ages.In this study,path analysis and one-way ANOVA were used to explore the influential indices of oyster body weight and fecundity.The results showed that shell height was the main factor affecting the body weight of Kumamoto oysters at one-year-old and two-year-old,followed by shell length.Body weight was the main factor influencing fecundity,and shell height showed a significant correlation with fecundity.Therefore,shell height should be considered the first parameter for selection when selecting Kumamoto oysters for body weight as the direct selection target.When one-year-old and two-year-old Kumamoto oysters were selected as parents from Xiangshan Bay,hatching parameters and growth parameters of F1 generation larvae were measured.The fecundity and egg diameters were 1.72×10^(6)and 46.60±3.62μm,respectively,which were significantly greater than one-aged oysters(5.86×10^(5),40.26±3.52μm).The hatching parameters(fertilized egg size,fertilization rate,and hatching rate)and larval growth performance(D-stage veliger and veliger)were similar and did not differ significantly(P>0.05),and after metamorphosis,there was also no significant difference in shell height size at 40 days of age(P>0.05).Therefore,there was no significant effect of age on reproduction,larval development,and the early growth of Kumamoto oysters.These results could provide a basis for parental sources and proper traits for Kumamoto oyster selection,which is beneficial to developing and utilizing this excellent germplasm resource.

关 键 词：Crassostrea sikamea Path analysis Reproductive performance Growth traits 

分 类 号：Q95[生物学—动物学]