文献类型： 外文期刊

作者： Xiang, Miao ¹ ; Xiao, Kun ¹ ; Xu, Hongliang ⁴ ; Li, Bo ⁴ ; Guo, Hongxi ⁴ ; Yang, Zhanhu ⁵ ; Zhu, Chuankun ⁶ ; Wang, Man ¹ ; Wang, Jie ¹ ; Xin, Wei ¹ ; Xie, Songguang ¹ ; Zhu, Xiaoming ¹ ; Zhang, Lei ¹ ;

作者机构： 1.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China

2.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Wuhan 430223, Peoples R China

3.Huaian Res Ctr, Ctr Hydrobiol, Huaian 223002, Peoples R China

4.Wuhan Acad Agr Sci, Wuhan 430065, Peoples R China

5.Liangcheng Cty Sci & Technol Bur Agr Livestock, Hohhot 013750, Inner Mongolia, Peoples R China

6.Huaiyin Normal Univ, Huaian 223300, Peoples R China

7.Hainan Univ, Haikou 570228, Peoples R China

关键词： Odontobutis potamophila; Fish larvae and juveniles; Prey composition; Diet shift; Allometric growth

期刊名称：AQUACULTURE （ 影响因子：3.9； 五年影响因子：4.4 ）

ISSN： 0044-8486

年卷期： 2025 年 596 卷

页码：

收录情况： SCI

摘要： The viability of fish during their early developmental stages is pivotal for population recruitment, a period during which individuals are frequently confronted with significant risks of starvation. There is limited knowledge regarding Odontobutis potamophila food selectivity before its transition to feeding on fish. Thus, this study aimed to elucidate its prey composition and diet shift from 0 to 22 days after hatching. We also examined early allometric growth patterns to confirm whether there was a correlation between the rapid onset of exogenous feeding in juvenile carnivorous fish and the earlier appearance of inflection points in various morphological traits. Cluster analysis showed a gradual shift in prey composition from nauplii to predominantly cladocerans and copepods as individuals grew. This adaptive shift in diet revealed a mechanism whereby the larger the individual, the larger the size of the bait ingested, and the faster the growth rate. The results of the allometric growth study demonstrated that O. potamophila emerged from the membrane with a total length of 6.53 +/- 0.51 mm and a body weight of 1.93 +/- 0.56 mg. The positive allometric growth of body weight relative to total length provides the required energy for organ development and onset of the juvenile stage. Feeding commences at one day posthatching, with the yolk sac fully depleted by day 6, thereby facilitating the transition into the exogenous nutritional phase as early as possible. The initial manifestation of certain morphological growth inflection points occurred predominantly around 10 days of age, concomitant with the advent of a shift in feeding habits. The prey composition, diet shifts, and growth patterns of early individuals with equilibrium strategy, represented by O. potamophila, have important implications for improving the survival of early life stages, thereby providing new strategies for population replenishment.