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Validation of otolith daily increment formation and growth analysis of yellow goosefish Lophius litulon
Fisheries Science ( IF 1.4 ) Pub Date : 2021-06-22 , DOI: 10.1007/s12562-021-01529-2
Weifeng Gao , Mitsuhiro Nakaya , Tomoya Ishikawa , Tetsuya Takatsu , Yuhei Takeya , Ryo Suzuki , Kyosei Noro

We validated the daily formation of increments in otoliths of yellow goosefish Lophius litulon using reared individuals to examine the growth in the field. Single, round-shaped core structures were observed in 41% of sagittae and in 73% of the lapilli. Therefore, lapillar otoliths were used for further observations of daily increment analysis. The lapillus radius of newly hatched larvae was 15.0 ± 1.4 μm (mean ± standard deviation) forming the hatch check (first check). At 6 days after hatching (DAH), the second check was observed, which may correspond to the energy transition from endogenous to exogenous nutrition, located at 28.1 ± 0.7 μm from the core structures. Thereafter, clear daily increments formed outside the check. To estimate larval growth in the field, we examined the relationship between the notochord length (NL) and lapillus radius by an allometric equation. The mean growth rate was estimated as ca. 0.18 mm in NL/day during 10–40 DAH. The results of this study provide insights into the previously unknown early life history and will enable further understanding of the population dynamics of the genus Lophius.



中文翻译:

黄颡鱼 Lophius litulon 耳石日增量形成及生长分析的验证

我们验证了黄鹅鱼Lophius litulon 耳石中每天增量的形成使用饲养个体来检查田间的生长情况。在 41% 的矢状面和 73% 的唇缘中观察到单个圆形核心结构。因此,使用耳廓耳石进一步观察日增量分析。新孵化的幼虫的 lapillus 半径为 15.0 ± 1.4 μm(平均值 ± 标准偏差),形成孵化检查(第一次检查)。在孵化后 6 天 (DAH),观察到第二次检查,这可能对应于从内源营养到外源营养的能量转换,位于距核心结构 28.1 ± 0.7 μm 处。此后,在支票之外形成了清晰的每日增量。为了估计田间幼虫的生长,我们通过异速生长方程检查了脊索长度 (NL) 和 lapillus 半径之间的关系。平均增长率估计为大约。0. 在 10-40 DAH 期间 NL/天 18 毫米。这项研究的结果提供了对以前未知的早期生活史的见解,并将有助于进一步了解该属的种群动态洛菲乌斯

更新日期:2021-06-22
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