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FRIMUF-Miljø- og utviklingsforskning

Fishery-induced changes in vital components of a large pike (Esox lucius) population

Tildelt: kr 1,8 mill.

Prosjektnummer:

171640

Søknadstype:

Prosjektperiode:

2006 - 2008

Geografi:

To reduce the impact of human activities on ecosystems is a major challenge of the next decades. Worldwide, overfishing depletes numerous fish stocks, threatening fisheries economy, biodiversity and the functioning of ecosystems. However, developing susta inable fishery policies necessitates a thorough understanding of how fish populations respond to the fishing pressure. In the present project, we have access to a unique long-term (1943 to present), individual-based growth, maturation and fecundity data s et of pike (Esox lucius) in Lake Windermere of North England. From this exceptional data set, we will be able to accurately model and quantify the ultimate processes (evolutionary vs. density-dependent plasticity) of fishing-induced adaptive changes in gr owth and maturation patterns of pike. Moreover, we plan to experimentally explore the proximate processes (behavioural and physiological mechanisms) behind density-dependent growth and maturation in pike. Then, we will develop a population dynamic harvest ing model in order to simulate a suite of harvest strategies and how they may impact on yield and population resilience. To succeed in this inclusive, multidisciplinary approach, we will lean on the exceptional competencies of the CEES at the University o f Oslo (host institution, Norway) and on international collaborations with the CEH (Lancaster, UK) and the UMR 5178 CNRS/MNHN/UPMC (Paris, France).

Budsjettformål:

FRIMUF-Miljø- og utviklingsforskning

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