Open WL Archief (OWA)

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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.

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one publication added to basket [41618]

Greenland halibut observed by video in front of survey trawl: behaviour, escapement, and spatial pattern Albert, O.T.; Harbitz, A.; Høines, Å.S. (2003). Greenland halibut observed by video in front of survey trawl: behaviour, escapement, and spatial pattern. J. Sea Res. 50(2-3): 117-127. https://dx.doi.org/10.1016/s1385-1101(03)00063-7 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: Geffen, A.J.; Nash, R.D.M.; van der Veer, H.W. (Ed.) (2003). Proceedings of the Fifth International Symposium on Flatfish Ecology, Part I. Port Erin, Isle of Man, 3-7 November 2002. Journal of Sea Research, 50(2-3). Elsevier: Amsterdam. 87-270 pp., meer

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Beschikbaar in	Auteurs
VLIZ: Non-open access 56773 [ aanvragen ]

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Trefwoorden

Catchability Catching methods > Net fishing > Trawling Data > Fishery data > Catch/effort Escapement Reinhardtius hippoglossoides (Walbaum, 1792) [WoRMS] ANE, Norway [Marine Regions] Marien/Kust

Author keywords

Greenland halibut; trawl video; behaviour; escapement; catchability

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Auteurs		Top
Albert, O.T. Harbitz, A. Høines, Å.S.

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Abstract

Video recordings of Greenland halibut (Reinhardtius hippoglossoides) were made at eight trawl stations in Svalbard waters in August 2002. The recordings were made down to 600 m depth using artificial light. A method for calculating actual fish length from the video image was established and the recordings were analysed with respect to length-dependent behaviour, escapement and spatial pattern. All Greenland halibut observed were either lying on the bottom or swimming in a horizontal position close to the bottom, and there was no tendency to schooling. Individual fish reacted in an ordered way to the approaching trawl and were herded along the ends of the ground-gear. Escapement under the ground-gear was higher for smaller fish, while some larger individuals were apparently able to escape the trawl ahead of the observed region.

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