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Aggregation at windmill artificial reefs: CPUE of Atlantic cod (Gadus morhua) and pouting (Trisopterus luscus) at different habitats in the Belgian part of the North Sea
Reubens, J.T.; Braeckman, U.; Vanaverbeke, J.; Van Colen, C.; Degraer, S.; Vincx, M. (2013). Aggregation at windmill artificial reefs: CPUE of Atlantic cod (Gadus morhua) and pouting (Trisopterus luscus) at different habitats in the Belgian part of the North Sea. Fish. Res. 139: 28-34. http://dx.doi.org/10.1016/j.fishres.2012.10.011
In: Fisheries Research. Elsevier: Amsterdam. ISSN 0165-7836; e-ISSN 1872-6763
Peer reviewed article  
Available in  Authors 
    Vlaams Instituut voor de Zee: Open Marine Archive 241543 [ download pdf ]
Keywords
    Aggregation
    Belgium
    Fishing > Catching methods > Line fishing
    Gadus morhua Linnaeus, 1758 [WoRMS]; Trisopterus luscus (Linnaeus, 1758) [WoRMS]
    Belgian Exclusive Economic Zone [Marine Regions]; North Sea [Marine Regions]
    Marine/Coastal
Author keywords
    Artificial hard substrates
Authors  Top 
  • Reubens, J.T.
  • Braeckman, U.
  • Vanaverbeke, J.
  • Van Colen, C.
  • Degraer, S.
  • Vincx, M.
Abstract
    Intensive exploitation of the marine environment by mankind can alter the natural habitat of marine organisms drastically. The addition of artificial hard substrates (e.g. shipwrecks and wind turbine foundations) to soft-sediment sandy bottoms is a pervasive example of an anthropogenic habitat change. To investigate the importance of hard substrate habitats for demersal fish species, we studied the spatio-temporal variability for two commercially important species, Atlantic cod (Gadus morhua) and pouting (Trisopterus luscus), from 2009 to 2011 at three different habitats in the Belgian part of the North Sea (BPNS), i.e. windmill artificial reefs (WARs), shipwrecks and sandy bottoms. Our results showed that population densities of both species were highly enhanced at the hard substrate habitats in comparison to the sandy sediments. The highest catch-per-unit effort values for both species were recorded around the WARs, which indicated distinct aggregation around the wind turbine foundations. In addition, the observed aggregation at the hard substrates differed between seasons. Highest population densities were observed in summer and autumn, i.e. the most intensive feeding period for both fishes.

    We conclude that the distribution and behaviour of Atlantic cod and pouting is affected by the presence and complexity of artificial hard substrates on the seabed.

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