Ontogenetic development, allometric growth patterns, and daily increment validation of larvae and juvenile Culter alburnus
Ontogenetic development, allometric growth patterns, and daily increment validation of larvae and juvenile Culter alburnus
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DOI：
10.1007/s10641-021-01181-w
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发表时间：
2021-11
影响因子：
1.4
通讯作者：
Yan Huang;Bo L. Song;Tao H. Deng;Qin Wang;Qi Shen;Liang G. Liu
中科院分区：
文献类型：
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作者：
Yan Huang;Bo L. Song;Tao H. Deng;Qin Wang;Qi Shen;Liang G. Liu
鱼类个体发育、异速生长模式和耳石微观结构是水产养殖的基础，对于了解鱼类的早期生命生态至关重要。鲌鲌是一种重要的商业鱼类，也是水产养殖的优良育种目标。在这项研究中，新孵化的C. alburnus幼虫在孵化场中培育至幼体阶段。孵化后三天，眼睛、嘴巴和肠道已发育完毕，幼虫卵黄囊已被完全吸收。鳍条在屈曲阶段开始分化，并在后屈阶段完全发育。幼鱼的色素沉着非常发达。鲌鲌幼体的特征是有 39-43 个肌节和 23-25 个臀鳍条、鱼鳔形状和色素沉着。头部长度、身高和肌肉组织高度显示出正异速生长模式，表明头部和躯干生长优先。尾巴的正异速生长与鳍的形成同时发生，表明游泳模式转变、饮食变化和栖息地转变发生在后屈阶段开始之后。每天沉积矢状体和拉皮里的耳石生长增量，第一个增量在第一天在矢状体上形成，并在第4天卵黄囊吸收在拉皮里形成。发育早期增量薄弱，后屈曲阶段增量逐渐增大，达到最宽，对比度最强，这可能与生境的变化有关。这些信息将有助于 C. 的育种和孵化生产。 alburnus 并建立合适的方法来分析该物种的时空分布和早期生命特征。
Fish ontogeny, allometric growth patterns, and otolith microstructure are fundamental in aquaculture and essential for understanding the early-life ecology of fish.Culter alburnusis a commercially important fish species and an excellent breeding target for aquaculture. In this study, newly hatchedC. alburnuslarvae were reared to the juvenile stage in a hatchery. Three days post hatch, the eyes, mouth, and intestine had developed, and the larval yolk sac had been completely absorbed. Fin rays started to differentiate in the flexion stage and were fully developed by the postflexion stage. Pigmentations were well developed in the juveniles.Culter alburnuslarvae were characterized by 39–43 myomeres and 23–25 anal fin rays, swim bladder shape, and pigmentation. Head length, height, and musculature height showed positive allometric growth patterns, suggesting that head and trunk growth was prioritized. Positive allometric growth of the tail was simultaneous with the formation of fins, suggesting that swimming mode transformation, diet changes, and habitat shifts occurred after the start of the postflexion stage. Otolith growth increments in both the sagittae and lapilli were deposited daily, with the first increment formed on day 1 on the sagittae and day 4 of yolk sac absorption on the lapilli. Increments were thin and faint during the early developmental stage, gradually increasing to reach the broadest widths and the strongest contrast at the postflexion stage, which may be related to habitat shifts. This information will assist in the breeding and hatchery production ofC. alburnusand establish suitable methods for analyzing this species’ spatiotemporal distributions and early-life traits.