Diadromous species sampling in Adour river-France

data were collected by the laboratoire de ressources halieutiques d'aquitaine (ifremer). the observations were carried out between april 1992 and july 2006. observations and measures were made on board commercial vessels, practicing on adour river generally in springtime and in summer. sampling of catches took place on the river between march and july; the researchers took scales, a blood sample, took measurements of length and weight on the fish caught by the fishermen during the observed fishing trips. sampling was of sampling-by-opportunity type.the driftnet is an emblematic and very old métier in this area, targeting different species as atlantic salmon (salmo salar), sea trout (salmo trutta), sea lamprey (pétromyzon marinus) and also allis shad (alosa alosa). this activity is framed by particular regulation as quota of fishing days and licenses. between 15 and 20 costal boats practice this métier during the year and the fleet characteristics are homogenous. the boats put the net in the water (around 100 m long) and let it drift with the surface current (downstream) while the tide is rising; the fish swimming upstream the river are then trapped in the water column. different meshes can be used.

该数据集由阿基坦海洋资源实验室（IFREMER）收集。观测活动于1992年4月至2006年7月间进行。在春季和夏季，研究人员于阿杜河上的商业渔船上进行了观测和测量。在3月至7月期间，对捕获物进行了采样；研究人员在观测期间的捕鱼过程中，对捕获的鱼类进行了鳞片、血液样本的采集，并测量了鱼类的长度和重量。采样为机会性采样。拖网捕鱼是该地区具有象征意义且历史悠久的传统渔法，针对的对象包括大西洋鲑鱼（Salmo salar）、海鳟鱼（Salmo trutta）、海鳗（Petromyzon marinus）以及鲱鱼（Alosa alosa）。该活动受到特定的法规约束，包括捕鱼日配额和许可证。每年有15至20艘沿海渔船从事此业，船队特征较为统一。渔船将网具（约100米长）放入水中，并在潮汐上涨时随水流漂移（顺流而下）；此时逆流而上的鱼类便被困在水柱中。可以采用不同网目的网具。