Day / night variation in fish directivity in the trawl opening
1994
Huse, Ingvar | Aglen, Asgeir | Engås, Arill | Godø, Olav Rune | West, Charles W.
Still photographs of fish in the mouth area of a bottom trawl were taken by a downwards-oriented automated strobe camera mounted near the headrope. Fish angles relative to the towing direction were measured. Fish were significantly less polarized by night than by day, and in the daytime photographs less polarization was seen at low fish densities than at higher. The results are discussed with regard to fish herding patterns and potential escapement beneath the fishing line of a trawl.
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书目信息
出版者
ICES
其它主题
Fish behaviour; Redskapsforsøk; Gear experiments; Vdp::agriculture and fishery disciplines: 900::fisheries science: 920::fisheries technology: 924; Trål; Vdp::mathematics and natural science: 400::zoology and botany: 480::ethology: 485; Fiskeatferd
语言
英语
格式
application/pdf
类型
Working Paper
来源
8 s.
2024-11-28
Dublin Core
