Kupren Krzysztof, Nowosad Joanna, Kucharczyk Dariusz
Department of Tourism, Recreation and Ecology, Institute of Engineering and Environmental Protection, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, 10-719 Olsztyn, Poland.
Department of Ichthyology, Hydrobiology and Aquatic Ecology, National Inland Fisheries Research Institute, Oczapowskiego 10, 10-719 Olsztyn, Poland.
Animals (Basel). 2023 Jul 18;13(14):2345. doi: 10.3390/ani13142345.
Growth patterns during early development of four species of riverine cyprinids, common dace ( L.), ide ( L.), chub ( L.) and common barbel ( L.), over 30 days of rearing, were analyzed. The study period covered three successive phases of larval development (preflexion, flexion, postflexion) and part of the juvenile development. The growth analysis carried out in the present study shows that significant allometric growth occurred mainly in preferentially localized body parts (head and tail) and was also associated with an increase in body height. The replacement of temporary structures (e.g., fin fold absorption) and the appearance of definitive structures around 21 mm TL (beginning of the juvenile period) corresponds to a stabilization of the relative growth of most parts of the body. This is probably due to the fact that the studied species had completed the most important part of the remodeling process (metamorphosis) and had achieved a body shape that allows juveniles to colonize faster water habitats. The results also indicate that individuals of species that are less developmentally advanced at the time of hatching (common barbel, chub) show greater initial dynamics of change in growth rate than individuals of species whose individuals are more advanced in ontogeny (common dace, ide). In addition, the small differences observed in growth parameters between successive periods analyzed, supported by the results of previous studies on these species, probably reflect the lack of abrupt changes in the behavior and habitat of the species studied.
分析了四种河川鲤科鱼类，即普通雅罗鱼（Leuciscus leuciscus）、赤梢鱼（Leuciscus idus）、圆腹雅罗鱼（Leuciscus cephalus）和唇（Barbus barbus）在30天饲养期内早期发育阶段的生长模式。研究期涵盖了幼体发育的三个连续阶段（前弯曲期、弯曲期、后弯曲期）以及部分幼鱼发育阶段。本研究进行的生长分析表明，显著的异速生长主要发生在优先定位的身体部位（头部和尾部），并且还与体高增加有关。临时结构的替换（例如，鳍褶吸收）以及在全长约21毫米（幼鱼期开始）时确定结构的出现对应于身体大部分部位相对生长的稳定。这可能是由于所研究的物种已经完成了重塑过程（变态）的最重要部分，并获得了一种使幼鱼能够更快地在水域栖息地定殖的体型。结果还表明，在孵化时发育程度较低的物种（唇、圆腹雅罗鱼）的个体比个体发育更高级的物种（普通雅罗鱼、赤梢鱼）的个体表现出更大的初始生长速率变化动态。此外，根据先前对这些物种的研究结果，在分析的连续时期之间观察到的生长参数的微小差异，可能反映了所研究物种的行为和栖息地缺乏突然变化。
