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Published 22.04.2015 - Updated 22.04.2015

Background

Fisheries-induced life history changes in terms of for example reduced age at first spawning have been observed in many demersal fish species. However, such changes have not been observed in pelagic species, although they too are under constant fishing pressure. Does this mean that the theory is wrong, or is there something else going on with pelagic species?

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Published 11.08.2016 - Updated 11.08.2016

Can less be more? New ConEvolHer article on stock assessment uncertainty

ICES Journal of Marine Science published an article by ConEvolHer members Fabian Zimmermann and Katja Enberg on the impact of assessment and survey frequency for stock estimates and uncertainty. The study shows that considering the prevailing overall high assessment uncertainty, reducing the assessment or survey frequency may not necessarily decrease the quality of stock estimates and could therefore be considered as a possibility to lower the costs of stock assessment.

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Published 11.08.2016 - Updated 11.08.2016

Harvest control rules in modern fisheries management

ConEvolHer project leader Katja Enberg participated in a Climate Change workshop in Ulvik in 2014, where work on a paper looking at the history, the present performance, and the future potential of Harvest Control Rules was initiated. Finally, this group effort has now been published in a special issue on Climate change impacts: Fish, fisheries and fisheries management.

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Published 25.04.2016 - Updated 25.04.2016

Article published in Marine Ecology Progress Series

In a new article published in Marine Ecology Progress Series, ConEvolHer members Fabian Zimmermann and Mikko Heino present together with Daniel Ricard from Fisheries and Oceans Canada an analysis on how intra-specific interactions influence recruitment in Atlantic fish stocks. Intra-specific interactions include cannibalism of older on younger cohorts or competition between cohorts and are considered to be important drivers of recruitment dynamics in many marine fish stocks.

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