A drop-net method for sampling Gobiusculus flavescens (Fabricius) and other fishes on hard and mixed bottoms with algal cover
In: Sarsia. University of Bergen. Universitetsforlaget: Bergen. ISSN 0036-4827; e-ISSN 1503-1128, meer
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| Abstract |
The construction, the sampling procedure and some typical results are described. The device consists of a floating frame (7 × 7 m) with a net suspended on the inside. It is transported by a boat and deployed by means of a pneumatic system and a heavy chain which pulls the net rapidly to the bottom. The net is pursed on the inside of the frame by hand and lifted by a hydraulic winch onboard the boat. The fish fauna caught by the drop-net is compared with the fauna caught in a beach seine, and results on the abundance of Gobiusculus flavescens are presented. |
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