Gill net catch counts for Cod and Dolly Varden

Catch information for cod Gadus morhua, which were collected in Kandalaksha Bay, White Sea, Russia, in 2014, and Dolly Varden Salvelinus malma, which were collected in Kronotskoe Lake in Eastern Kamchatka, Russia, in 2013. In both places fish were caught with identical monofilament gill nets of different mesh sizes with a 0.5 hanging ratio. The length of the nets was 30 m for cod and 15 m for Dolly Varden and the height of the nets was 1.5 m in both cases. The duration of the fishing operation was 12 h (from sunset to dawn) for both species and number of fishing operations was 11 for cod and 9 for Dolly Varden. Dolly Varden were caught with gill nets of 22, 25, 30 and 35 mm mesh size (knot to knot) and cod were caught with gill nets of 20, 25 and 30 mm mesh size. The different mesh size nets were set together and were fished concurrently. In both cases nets were set in the afternoon and retrieved the following morning. In total, 694 cod and 783 Dolly Varden were caught.

本数据集收录了2014年采集于俄罗斯白海坎达拉克沙湾的大西洋鳕（Gadus morhua）渔获信息，以及2013年采集于俄罗斯东堪察加半岛克罗诺基湖的花羔红点鲑（Salvelinus malma，俗称Dolly Varden）渔获信息。两处采样均采用规格统一的单丝刺网（monofilament gill nets），其挂网率（hanging ratio）均为0.5，但网目尺寸存在差异。大西洋鳕采样所用刺网总长为30米，花羔红点鲑采样所用刺网总长为15米；两类采样所用刺网的网高均为1.5米。两类鱼种的捕捞作业时长均为12小时（从日落至日出）；大西洋鳕的捕捞作业次数为11次，花羔红点鲑的捕捞作业次数为9次。花羔红点鲑采样使用的刺网网目尺寸（节点间距，knot to knot）分别为22、25、30及35毫米，大西洋鳕采样使用的刺网网目尺寸分别为20、25及30毫米。不同网目尺寸的刺网同时布设并同步开展捕捞作业。两处采样的刺网均于当日下午布设，于次日清晨回收。本次采样共捕获大西洋鳕694尾，花羔红点鲑783尾。