Published 28.02.2018 - Updated 28.02.2018

What regulates population dynamics in marine fish?

New ConEvolHer article: Although population regulation is a central concept in ecology, it is surprisingly difficult to detect it empirically. In marine fish populations, it is commonly assumed that the main source of regulation is density-dependent recruitment, which is based on a decreasing number of recruits per capita with increasing population size. Other sources of density dependence such as growth are known, however it is often no clear whether they are of importance.

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Published 25.09.2017 - Updated 25.09.2017

Recruitment dynamics in a changing environment: what we know and how to deal with it (ICES ASC 2017)

At this year’s ICES Annual Science Conference in Fort Lauderdale, Florida, session P on recruitment dynamics, organized and co-convened by ConEvolHer, took place on the first two days of the conference. The session featured 20 presentations on a wide range of topics from fundamental biology of recruitment to spatial processes that are crucial for recruitment success and implementations of recruitment dynamics in stock assessment. The session concluded with a panel discussion of four distinguished experts, focussing on ways to move forward in understanding recruitment dynamics and implement them better in a management context.

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Published 15.09.2017 - Updated 15.09.2017

ICES ASC 2017 featuring ConEvolHer’s session starts on Monday

This year’s ICES Annual Science Conference in Fort Lauderdale, Florida, will start this Monday 18th of September and so will the session P convened by ConEvolHer. The session will contain 20 presentations, including a keynote presentation of Stephan B. Munch (NOAA/UCSC), and a range of poster presentations as well as panel discussion.

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Published 28.03.2017 - Updated 28.03.2017

ICES/PICES Symposium on Drivers of dynamics of small pelagic fish resources in Victoria, Canada

Marion Claireaux , (ConEvolHer), Fabian Zimmermann (ConEvolHer) and Nikos Nikolioudakis (EcoNorSe ) crossed the Atlantic to participate in the joint ICES/PICES Symposium on Drivers of dynamics of small pelagic fish resources in Victoria, Canada. The Symposium was full of captivating presentations, summing up the knowledge about small pelagics over the world, from the last 35 years, when such a gathering was last held. Marion, Fabian and Nikos also caught up with old colleagues and got to meet new for promising future collaborations.

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Published 27.02.2017 - Updated 27.02.2017

Gear selectivity as a key to evolutionarily enlightened management?

As trade-offs are inevitable among the objectives in fisheries management, the maximization of yield from a fishery is traditionally considered to be in conflict with the mitigation of its evolutionary impacts. However, this perspective focuses mostly on fishing mortality alone, whereas modern fisheries management often neglects the role of gear selectivity. In a new study published in Marine Ecology Progress Series, ConEvolHer members Fabian Zimmermann and Christian Jørgensen investigated in Northeast Arctic cod how fishing gear and size selective fishing affects population dynamics, catch and potential trade-offs between management objectives.

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