Fishing down the value chain: Biodiversity and access regimes in freshwater fisheries - the case of Malawi

Victor Kasulo, Charles Perrings

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

This paper considers the connection between the diversity of catch in a multi-species fishery and the productivity of the fishery under different access regimes. A modified Gordon-Schaefer model is used to analyse the importance of the level of diversity in a fishery in open access and profit maximising regimes. The modified model, which includes both environmental and bioeconomic variables, is fitted to data from a gillnet fishery in Lake Malawi. Pressure on stocks is shown to be greater at all levels of biodiversity in open access than it is in profit maximising regimes. However, in a profit maximising regime both catch and the productivity of fishing effort is highest when there is a single marketed species. By contrast, in an open access regime catches are maximised at higher levels of bioeconomic diversity than in profit maximising regimes. Implications for policy are discussed.

Original languageEnglish (US)
Pages (from-to)106-114
Number of pages9
JournalEcological Economics
Volume59
Issue number1
DOIs
StatePublished - Aug 5 2006

Keywords

  • Biodiversity
  • Fisheries
  • Open access

ASJC Scopus subject areas

  • Environmental Science(all)
  • Economics and Econometrics

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