Abundance of mesopelagic fish through the water column and diel patterns in the western Mediterranean Sea in winter and summer

This file contains data on numerical abundance of mesopelagic fishes collected in winter (December 2009) and summer (July 2010) in the Balearic Islands region. A relatively small area was repeatedly sampled throughout the day. Samples were obtained by means of a double-warp modified commercial mid-water trawl, with standard pelagic trawl doors (otter boards) and graded-mesh netting to the cod-end (10 mm). Hauls were horizontal and lasted between 30 min and 1 hour, and the depth of the net was controlled by a SCANMAR system. Samples were identified on board or frozen for a later identification in the laboratory. These data were obtained within the project: "Estructura y dinámica del ecosistema bentopelágico de talud en dos zonas oligotróficas del Mediterráneo: una aproximación multidisciplinar y a distintas escalas temporales en las Islas Baleares", financed by the Spanish Ministerio de Ciencia e Innovación CTM2007-65844-C03.

本文件收录了在冬季（2009年12月）和夏季（2010年7月）对巴利阿里群岛区域中层海洋鱼类数量丰度的数据。在全天候对相对较小的区域进行了重复采样。样本通过改进的双曲率商业型中层拖网采集，配备标准中层拖网门（海豹板）和粗网目网至鱼尾（10毫米）。拖网作业呈水平状态，持续时间为30分钟至1小时，网深由SCANMAR系统控制。样本在船上鉴定或在实验室进行后续鉴定时进行冷冻保存。这些数据是在由西班牙科学与创新部资助的项目“Estructura y dinámica del ecosistema bentopelágico de talud en dos zonas oligotróficas del Mediterráneo: una aproximación multidisciplinar y a distintas escalas temporales en las Islas Baleares”（地中海两个贫营养区域海底-中层生态系统结构及动态：巴利阿里群岛的多学科和多时间尺度研究）框架下获取的，项目编号为CTM2007-65844-C03。