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

Guangqiu Chang; Sheng Liu; Hongqiang Xu; Minhai Liu; Zhihua Lin; Qinggang Xue

Aquaculture and Fisheries (Mar 2024)

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

Guangqiu Chang,
Sheng Liu,
Hongqiang Xu,
Minhai Liu,
Zhihua Lin,
Qinggang Xue

Affiliations

Guangqiu Chang: National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, 201306, China; Ninghai Institute of Mariculture Breeding and Seed Industry, Zhejiang Wanli University, Ninghai, Zhejiang Province, 315604, China; Key Laboratory of Aquatic Germplasm Resources of Zhejiang, Zhejiang Wanli University, Ningbo, 315100, China
Sheng Liu: Ninghai Institute of Mariculture Breeding and Seed Industry, Zhejiang Wanli University, Ninghai, Zhejiang Province, 315604, China; Key Laboratory of Aquatic Germplasm Resources of Zhejiang, Zhejiang Wanli University, Ningbo, 315100, China
Hongqiang Xu: Ninghai Institute of Mariculture Breeding and Seed Industry, Zhejiang Wanli University, Ninghai, Zhejiang Province, 315604, China; Key Laboratory of Aquatic Germplasm Resources of Zhejiang, Zhejiang Wanli University, Ningbo, 315100, China
Minhai Liu: Ninghai Institute of Mariculture Breeding and Seed Industry, Zhejiang Wanli University, Ninghai, Zhejiang Province, 315604, China; Key Laboratory of Aquatic Germplasm Resources of Zhejiang, Zhejiang Wanli University, Ningbo, 315100, China
Zhihua Lin: Ninghai Institute of Mariculture Breeding and Seed Industry, Zhejiang Wanli University, Ninghai, Zhejiang Province, 315604, China; Key Laboratory of Aquatic Germplasm Resources of Zhejiang, Zhejiang Wanli University, Ningbo, 315100, China
Qinggang Xue: Ninghai Institute of Mariculture Breeding and Seed Industry, Zhejiang Wanli University, Ninghai, Zhejiang Province, 315604, China; Key Laboratory of Aquatic Germplasm Resources of Zhejiang, Zhejiang Wanli University, Ningbo, 315100, China; Corresponding author. Ninghai Institute of Mariculture Breeding and Seed Industry, Zhejiang Wanli University, Ninghai, Zhejiang Province 315604, China.

Journal volume & issue: Vol. 9, no. 2
pp. 164 – 171

Abstract

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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 × 106 and 46.60 ± 3.62 μm, respectively, which were significantly greater than one-aged oysters (5.86 × 105, 40.26 ± 3.52 μm). 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.

Published in Aquaculture and Fisheries

ISSN: 2468-550X (Online)
Publisher: KeAi Communications Co., Ltd.
Country of publisher: China
LCC subjects: Agriculture: Aquaculture. Fisheries. Angling
Website: https://www.keaipublishing.com/en/journals/aquaculture-and-fisheries

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