Università di Corsica Pasquale Paoli, UMR CNRS 6134 Sciences Pour l'Environnement, Corte, France.
Università di Corsica Pasquale Paoli, UMS CNRS 3514 STELLA MARE, Biguglia, France.
J Fish Biol. 2019 Aug;95(2):348-356. doi: 10.1111/jfb.13955. Epub 2019 Jul 12.
Experimental measurements were made in the laboratory to determine the swimming capacities of settlement-stage fish larvae of several Mediterranean coastal species collected from the nearshore waters of Corsica, France. Critical swimming speed (U , cm s ) was measured to provide a realistic laboratory estimate of in situ swimming speed. Morphometric traits were measured to assess potential predictors of a species' swimming ability and, when possible, daily otolith increments were used to estimate age. Observed swimming speeds were consistent with other temperate species and demonstrated that the tested species are competent swimmers and not passive components of their environment. Morphological traits varied in their correlation with U across groups and species. Direct measurements of morphological traits were better predictors than calculated ratios. Pelagic larval duration had little relationship with swimming speed among species for which daily otolith increments were counted. In addition to expanding the database on swimming capacities of settlement-stage fish larvae in the Mediterranean Sea, this study also developed methods that simplify the assessment of larval fish swimming ability. Swimming speed data are essential for improving larval dispersal models and for predicting recruitment rates in coastal fish populations.
实验测量是在实验室中进行的，目的是确定从法国科西嘉近海采集的几种地中海沿海物种的沉降阶段幼鱼的游泳能力。临界游泳速度（U，cm/s）被测量，以提供对原位游泳速度的现实实验室估计。形态特征被测量，以评估物种游泳能力的潜在预测因子，并且在可能的情况下，每日耳石增量被用来估计年龄。观察到的游泳速度与其他温带物种一致，表明测试物种是有能力的游泳者，而不是其环境的被动组成部分。形态特征在组间和物种间与 U 的相关性上存在差异。形态特征的直接测量比计算比值更能预测游泳速度。对于那些每天都有耳石增量的物种来说，浮游幼虫期与游泳速度的关系不大。除了扩展地中海沉降阶段幼鱼游泳能力的数据库外，本研究还开发了简化幼鱼游泳能力评估的方法。游泳速度数据对于改进幼鱼扩散模型和预测沿海鱼类种群的补充率至关重要。
