Premium
An ecological–economic model on the effects of interactions between escaped farmed and wild salmon ( Salmo salar )
Author(s) -
Liu Yajie,
Diserud Ola H.,
Hindar Kjetil,
Skonhoft Anders
Publication year - 2013
Publication title -
fish and fisheries
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.747
H-Index - 109
eISSN - 1467-2979
pISSN - 1467-2960
DOI - 10.1111/j.1467-2979.2012.00457.x
Subject(s) - salmo , fishery , fishing , fecundity , stock (firearms) , salmonidae , fish farming , aquaculture , agriculture , biology , ecology , fish <actinopterygii> , geography , population , demography , archaeology , sociology
This study explores the ecological and economic impacts of interactions between escaped farmed and wild Atlantic salmon ( Salmo salar , Salmonidae) over generations. An age‐ and stage‐structured bioeconomic model is developed. The biological part of the model includes age‐specific life‐history traits such as survival rates, fecundity and spawning successes for wild and escaped farmed salmon, as well as their hybrids, while the economic part takes account of use and non‐use values of fish stock. The model is simulated under three scenarios using data from the Atlantic salmon fishery and salmon farming in Norway. The social welfare is derived from harvest and wild salmon while the economic benefits of fishing comprise both sea and river fisheries. The results reveal that the wild salmon stock is gradually replaced by salmon with farmed origin, while the total social welfare and economic benefit decline, although not at the same rate as the wild salmon stock.