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| Daan, N; De Boois, I; Emslie, D.c.; Fletcher, N.; Heessen, H; Larsen, L.i.; Lassen, H; Mahe, Jean-claude; Newton, A.w.; Patberg, W.; Peach, K.j.; Piet, G.j.; Sparholt, H.; Star, B; Storbeck, F. |
| Tipo: Text |
Palavras-chave: BTS; BITS; IBTS; CIEM; Chalutage; Base de données; BTS; BITS; IBTS; ICES; European waters; Trawl survey; Fish stock. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/2001/rapport-2173.pdf |
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| Moriarty, M.; Sell, A. F.; Trenkel, Verena; Lynam, C. P.; Burns, F.; Clarke, E. D.; Greenstreet, S. P. R.; Mcgonigle, C.. |
| An experiment during a fisheries independent survey in the North Sea was conducted to test whether sampling effort could be reduced without a significant loss in data precision. To examine potential effects of reducing tow duration from the standard 30 min to a proposed 15 min estimates of species encounter rates, species richness, and estimates of abundance, biomass, and body size were analysed. Results show species richness estimates are lower in the short tow category. While biomass and abundance at length and body size are significantly affected by the change in tow duration, estimates of Large Fish Indicator, the Typical length and Mean-max length are not significantly affected by the regime change. The results presented here suggest that a reduction... |
| Tipo: Text |
Palavras-chave: Abundance; Biomass; Body size; Fisheries independent survey; IBTS; International Bottom Trawl Survey; Linear mixed model; North Sea; Species diversity. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00439/55028/60477.pdf |
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