UMR 7208 BOREA (MNHN, CNRS, IRD, SU, UCN, UA), Laboratoire de Biologie des Organismes et Ecosystèmes Aquatiques, Paris, France; MNHN, Station Marine de Dinard, CRESCO, Dinard, France.
UMR 7208 BOREA (MNHN, CNRS, IRD, SU, UCN, UA), Laboratoire de Biologie des Organismes et Ecosystèmes Aquatiques, Paris, France; MNHN, Station Marine de Dinard, CRESCO, Dinard, France; School of Life Sciences, University of Liverpool, Liverpool, UK.
Mar Environ Res. 2022 Dec;182:105797. doi: 10.1016/j.marenvres.2022.105797. Epub 2022 Nov 7.
Despite the importance of estuarine nurseries in the regulation of many fish stocks, temporal and spatial movements and habitat use patterns of juvenile fish remain poorly understood. Overall, combining several movement metrics allowed us to characterize dispersal patterns of juvenile flounder, Platichthys flesus, along an estuarine seascape. Specifically, we investigated otolith microchemistry signatures (Sr:Ca and Ba:Ca ratios) and stable isotope ratios (δC and δN) in muscles of these juveniles, during three consecutive years to assess inter-annual fluctuations in their home range and isotopic niches. The morphological condition and lipid content of individuals were lower in years of high as compared to low dispersal along the estuarine gradient. We discuss these results in relation to the ecosystem productivity and intra- and inter-specific competition level, which in turn affects movements and foraging behaviors of juvenile flounders.
尽管河口育幼场对许多鱼类种群的调节具有重要意义，但幼鱼的时空运动和栖息地利用模式仍了解甚少。总的来说，将几种运动指标相结合，使我们能够描述鲽形目幼鱼 Platichthys flesus 在河口景观中的扩散模式。具体来说，我们在连续三年的时间里，研究了这些幼鱼的耳石微化学特征（Sr:Ca 和 Ba:Ca 比值）和肌肉中的稳定同位素比值（δC 和 δN），以评估其在年度内的家域和同位素生态位的波动。在沿河口梯度的高扩散年份中，个体的形态状况和脂质含量较低。我们将这些结果与生态系统生产力以及种内和种间竞争水平联系起来，而这些因素又会影响鲽形目幼鱼的运动和觅食行为。
