王腾, 刘永, 李纯然, 李纯厚, 唐广隆, 肖雅元, 林琳, 吴鹏. 南沙美济礁海域隆背笛鲷繁殖和食性的初步研究[J]. 南方水产科学, 2022, 18(6): 78-84. DOI: 10.12131/20210379
引用本文: 王腾, 刘永, 李纯然, 李纯厚, 唐广隆, 肖雅元, 林琳, 吴鹏. 南沙美济礁海域隆背笛鲷繁殖和食性的初步研究[J]. 南方水产科学, 2022, 18(6): 78-84. DOI: 10.12131/20210379
WANG Teng, LIU Yong, LI Chunran, LI Chunhou, TANG Guanglong, XIAO Yayuan, LIN Lin, WU Peng. A preliminary study on reproduction and feeding habits of Lutjanus gibbus from Meiji Reef of Nansha[J]. South China Fisheries Science, 2022, 18(6): 78-84. DOI: 10.12131/20210379
Citation: WANG Teng, LIU Yong, LI Chunran, LI Chunhou, TANG Guanglong, XIAO Yayuan, LIN Lin, WU Peng. A preliminary study on reproduction and feeding habits of Lutjanus gibbus from Meiji Reef of Nansha[J]. South China Fisheries Science, 2022, 18(6): 78-84. DOI: 10.12131/20210379

南沙美济礁海域隆背笛鲷繁殖和食性的初步研究

A preliminary study on reproduction and feeding habits of Lutjanus gibbus from Meiji Reef of Nansha

  • 摘要: 隆背笛鲷 (Lutjanus gibbus) 是一种肉质鲜美且经济价值高的珊瑚礁鱼类,其产卵集聚容易造成过度捕捞。以2020年7月在美济礁海域潜水捕捞采集的67尾隆背笛鲷样本为研究对象,研究其性比、性成熟体长、卵径特征、繁殖力和食性等生物学特征,以期为这一珊瑚礁经济鱼类提供保护和管理的基础生物学数据。结果显示,隆背笛鲷雌雄比为2∶1;雌、雄性的50%性成熟体长 (L50) 分别为204.757和201.623 mm;IV期性腺卵径为0.176~0.419 mm (平均0.296 mm);卵径频率分布为单峰型。隆背笛鲷的繁殖力为51 858~276 205 粒 (平均139 145 粒),其繁殖力与体长、体质量成显著的幂函数关系。美济礁隆背笛鲷可摄食蟹、鱼、螺、贝和虾。稳定同位素研究显示隆背笛鲷的平均营养级为3.33,其食性随个体发育转变明显,如生态位变窄和营养级变高等。

     

    Abstract: Lutjanus gibbus, a kind of coral reef fish with delicious meat and high economic value, whose spawning aggregation can easily lead to overfishing. Based on 67 individuals of L. gibbus collected by diving fishing in the waters of Meiji Reef in July 2020, we investigated its basic biological characteristics, including sex ratio, sexual maturity body length, egg diameter characteristics, fecundity and feeding habits, in order to provide basic biological data for the protection and management of L. gibbus. The results show that the ratio of female to male of L. gibbus was 2:1; the 50% sexually mature body lengths of males and females were 204.757 and 201.623 mm, respectively; the egg diameter of Stage IV gonadal was 0.176–0.419 mm with an average of 0.296 mm; the frequency distribution of egg diameter was unimodal. The fecundity of L. gibbus was 51 858–276 205 eggs with an average of 139 145 eggs. Its fecundity had a significant power function relationship with body length and body mass. The preys of L. gibbus from Meiji Reef were crabs, fish, snails, shellfish and shrimps. The stable isotope study shows that the average trophic level of L. gibbus was 3.33, and its feeding habits changed significantly with individual development (The niche width was narrower and the trophic level was higher).

     

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