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Distribution patterns of deep-sea fish and benthic invertebrates from trawlable grounds of the Hatton Bank, north-east Atlantic: effects of deep-sea bottom trawling

  • P. Durán Muñoz (a1), M. Sayago-Gil (a2), T. Patrocinio (a1), M. González-Porto (a3), F. J. Murillo (a1), M. Sacau (a1), E. González (a4), G. Fernández (a1) and A. Gago (a1)...

Abstract

Distributions of deep-sea fish, benthic invertebrates and the effects of deep-sea bottom trawling were studied based on data collected in 2005 from a joint collaboration survey undertaken between the Spanish Institute of Oceanography and a deep-sea trawler on the Hatton Bank (north-east Atlantic). A total of 163 valid bottom trawl hauls (600–1600 m) were analysed. The main trawlable grounds were located on the sedimentary seabed of the western flank of the bank (Hatton Drift). Grenadiers and smoothheads were predominant in the trawl catches (67% and 11.8% by weight respectively). Both species were abundant along the western flank. Deep-water sharks accounted for 7.4% of weight, and were abundant along the south-eastern slopes. Chimerids, lotids, morids and other deep-sea species were also taken as by-catch. Grenadiers and deep-water sharks dominated the discards. By-catches of cold-water corals were generally associated with the rocky outcrop and were more abundant at the top of the bank. Abundant by-catches of large sponges, characteristic of sponge-dominated biotopes, were taken from the eastern flank.

Copyright

Corresponding author

Correspondence should be addressed to: P. Durán Muñoz, Instituto Español de Oceanografía, Centro Oceanográfico de Vigo, Programa de Pesquerías Lejanas, Subida a Radiofaro 50–52, 36390 Vigo, Spain email: pablo.duran@vi.ieo.es

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Keywords

Distribution patterns of deep-sea fish and benthic invertebrates from trawlable grounds of the Hatton Bank, north-east Atlantic: effects of deep-sea bottom trawling

  • P. Durán Muñoz (a1), M. Sayago-Gil (a2), T. Patrocinio (a1), M. González-Porto (a3), F. J. Murillo (a1), M. Sacau (a1), E. González (a4), G. Fernández (a1) and A. Gago (a1)...

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