Abstract：
Myctophids, commonly vertical migrators, and partial and non-migrant stomiiforms constitute most of the mesopelagic biomass, and transport organic matter throughout the food web from the surface to the ocean\'s depths. Both the diet and trophic structure of twenty-nine species of mesopelagic fish collected around the Iberian Peninsula were studied through the analysis of stomach contents, quantifying food items with a high taxonomic resolution. The investigation covered oligotrophic to productive habitats, with sampling stations distributed in five discrete zones of the western Mediterranean Sea and the northeastern Atlantic Ocean. The geographic environmental conditions, migratory behavior, and species-specific body sizes allowed for the identification of some major feeding patterns for these fish communities. The trophic niche of migrant myctophids showed a high overlap, with copepods as the primary prey category. The diet composition of generalist myctophids (e.g., Ceratoscopelus maderensis and Hygophum benoiti) reflected the distinct zooplanktonic communities between zones. Large stomiiforms (Chauliodus spp., Sigmops elongatus) preferred feeding on micronekton, while the smallest stomiiforms (e.g., Argyropelecus spp., Cyclothone spp., Vinciguerria spp.) preyed on copepods and ostracods. Given the relevance of the mesopelagic fish communities for commercially exploited species and, therefore, for maintaining the sustainability of the fisheries\' activity in the zones analyzed, the information provided in the present study is essential for a better understanding of the biology and ecology of these species.
摘要：
Myctophids,通常是垂直迁徙者，部分和非迁移的气孔型构成了中生生物量的大部分，并将有机物质从地表运输到整个食物网的海洋深处。通过分析胃内容物，研究了伊比利亚半岛周围收集的29种中生鱼类的饮食和营养结构，以高分类分辨率量化食品项目。调查涵盖了贫营养到生产性栖息地，采样站分布在地中海西部和大西洋东北部的五个离散区域。地理环境条件,迁徙行为，和特定物种的体型允许识别这些鱼类群落的一些主要喂养方式。移栖食草动物的营养生态位表现出高度重叠，以co足类为主要猎物。通才霉菌的饮食组成(例如，Ceratoscopelusmaderensis和Hygophumbenoiti）反映了区域之间不同的浮游动物群落。大气孔形(Chauliodusspp.,Sigmopselongatus）首选以微牛顿为食，而最小的气孔形式(例如，Argyropelecusspp。,Cyclothonespp.,Vinciguerriaspp.）捕食co足类动物和成虫。鉴于中生鱼类群落与商业开发物种的相关性，因此,为了保持所分析区域内渔业活动的可持续性，本研究提供的信息对于更好地了解这些物种的生物学和生态学至关重要。
