Sandeel survey 2017

The purpose of the sand eel dredge survey is to collect sand eels buried in the seabed and compare catches (number and age composition) with the previous year's collections to assess the year class strength of sand eel in area 1r, 2r and 3r of the different areas adopted by ICES in 2016. Data from the dredge survey is the basis for calculating an index, which is used in the stock assessment for sand eel in the North Sea.

本玉筋鱼（sand eel）底拖网调查的目的是采集埋藏于海底的玉筋鱼，将本次渔获的数量与年龄组成与上年采集的样本数据进行对比，以此评估国际海洋考察理事会（ICES）2016年划定的1r、2r及3r海区内玉筋鱼的世代强度。本次拖网调查所得数据是计算相关指数的基础，该指数可用于北海海域玉筋鱼的渔业资源评估。