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The dynamics of small-scale patchiness of plaice and sole as reflected in the catch rates of the Dutch beam trawl fleet and its implications for the fleet dynamics Poos, J.-J.; Rijnsdorp, A.D. (2007). The dynamics of small-scale patchiness of plaice and sole as reflected in the catch rates of the Dutch beam trawl fleet and its implications for the fleet dynamics. J. Sea Res. 58(1): 100-112. https://dx.doi.org/10.1016/j.seares.2007.01.006 In: Journal of Sea Research. Elsevier/Netherlands Institute for Sea Research: Amsterdam; Den Burg. ISSN 1385-1101; e-ISSN 1873-1414, meer Ook verschenen in: Yamashita, Y.; Nash, R.D.M.; van der Veer, H.W. (Ed.) (2007). Proceedings of the Sixth International Symposium on Flatfish Ecology, Part II, held at Maizuru, Kyoto, Japan from 20-25 October 2005. Journal of Sea Research, 58(1). Elsevier: Amsterdam. 1-112 pp., meer Is gerelateerd aan: Poos, J.-J.; Rijnsdorp, A.D. (2010). The dynamics of small-scale patchiness of plaice and sole as reflected in the catch rates of the Dutch beam trawl fleet and its implications for the fleet dynamics, in: Poos, J.-J. Effort allocation of the Dutch beam trawl fleet. pp. 29-51, meer

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Beschikbaar in	Auteurs
VLIZ: Non-open access 122950 [ aanvragen ]

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Trefwoorden

20th century ANE, North Sea Catching methods > Net fishing > Trawling Data > Fishery data > Catch/effort Fisheries > Finfish fisheries > Flatfish fisheries Patchiness Spatial variations Pleuronectes platessa Linnaeus, 1758 [WoRMS]; Solea solea (Linnaeus, 1758) [WoRMS] Noordzee [Marine Regions] Marien/Kust

Author keywords

spatial variations; flatfish fisheries; catch/effort; North Sea

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Auteurs		Top
Poos, J.-J. Rijnsdorp, A.D.

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Abstract

Catch rates of sole Solea solea and plaice Pleuronectes platessa in the Dutch beam trawl fleet operating in the North Sea show spatio-temporal variation. The variation in catch rates reflects differences in abundance of the species. Up to 45% of the variation in catch rates can be explained by the time of day of the catch, the engine power of the vessel and the migration cycles of the species. Also, spatial covariance was found in the residual variation for both species using variograms and covariance functions. The ranges of the spatial structure were found to be between approximately 20 to 45 nautical miles, indicating patchy distribution of the species. No differences in the ranges of the spatial structures were found between different seasons. Cross-covariance analysis shows the patches lasted up to two weeks. The implication of the spatial pattern in flatfish for the dynamics of effort allocation is discussed.

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