Fish bycatch and discarding in Nephrops trawlers in the Firth of Clyde (west of Scotland)

Y. Stratoudakis, R. J. Fryer, Robin Cook, Graham John Pierce, K. A. Coull

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Nephrops norvegicus (Norway lobster or prawn) is an important target species in demersal fisheries of the north-east Atlantic. Trawling for Nephrops is wasteful when many small fish are caught and discarded in the process. Here, data from 106 commercial fishing trips, sampled between 1982 and 1998 as part of the Scottish discard sampling programme, are used to investigate the fish bycatch and discards of Nephrops trawlers in the Firth of Clyde (west of Scotland). A large proportion of the fish caught in the Clyde is discarded, the discards mainly consisting of small demersal fish (mean length about 19 cm), particularly young whiting (Merlangius merlangus). Within the study period, annual estimates of total fish discards ranged from 318 to 3027 tonnes, with a mean of 1761 tonnes. Fish landings and discards biomass per unit effort both decreased over the study period. However, the decline in landings per unit effort was greater than that in discards per unit effort, corresponding to an increase in the discard rate over time. In recent years, discards have comprised about 70% of the fish bycatch. The mean length of discarded fish was positively related to mesh size. (C) 2001 Ifremer/CNRS/Inra/IRD/Cemagref/Editions scientifiques et medicales Elsevier SAS.

Original languageEnglish
Pages (from-to)283-291
Number of pages8
JournalAquatic Living Resources
Volume14
DOIs
Publication statusPublished - 2001

Keywords

  • bycatch
  • fish discards
  • trawling
  • Nephrops norvegicus
  • Firth of Clyde
  • MESH SIZE
  • SEA
  • BIOLOGY
  • CATCH

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