Open AccessJoint management of marine mammals and a fish species: The case of cod and grey seals in the Nordic‐Baltic Sea countries
Author(s) -
Blomquist Johan,
Jensen Frank,
Waldo Staffan,
Flaaten Ola,
Holma Maija K.
Publication year - 2022
Publication title -
natural resource modeling
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.28
H-Index - 32
eISSN - 1939-7445
pISSN - 0890-8575
DOI - 10.1111/nrm.12341
Subject(s) - fishery , predation , baltic sea , population , profit (economics) , north sea , fish <actinopterygii> , seal (emblem) , fish stock , predator , marine species , marine fish , population dynamics of fisheries , ecology , biology , geography , economics , oceanography , microeconomics , demography , archaeology , sociology , geology
In this paper, we present a simple theoretical, steady‐state equilibrium, predator‐prey model for the joint management of marine mammals and a fish species. As an empirical case, we choose cod and grey seals in the Nordic‐Baltic Sea countries, and several benefits and costs related to the latter are considered. We show that the optimal grey seal population is much lower than the actual population, and this result is robust to variations in relevant parameter values. This result can be explained by the fact that the profit from harvesting cod is much higher than the net benefits from grey seals.