University of Antwerp; Faculty of Sciences; Department of Biology; Research group Systemic Physiological and
Ecotoxicological Research (SPHERE)
Blust, Ronny
Alfred Wegener Institute for Polar- and Marine Research (AWI), more, partner
Pörtner, Hans-Otto, contact
Abstract
The general objective of this proposal is to investigate the possible impact of climate induced temperature changes on the distribution and population dynamics of two fish species by evaluating the effects of the temperature regime on the physiological, genetic and ecological level. We have selected two model species which have their northern and southern distribution limits in the North Atlantic and the different populations of which have adapted to differing temperature regimes. Cod (Gadus morhua) represents the offshore species whereas the eelpout (Zoarces viviparus) is the coastal target. The specific objectives of this proposal are related to the following tasks:
Ecological Studies.
To identify effects of past, climate induced temperature
changes on the distribution and population dynamics of cod and eelpout populations in North Sea, Baltic Sea, Norwegian Sea and Barents Sea by retrospective studies and to assess the influence of climate conditions on the population parameters of these species from different climate regions.
Physiological Studies.
To determine the critical sublethal temperature limits
of these species by identification and monitoring the temperature sensitive physiological key processes and to build up an energy balance.
Genetic Studies.
To determine the adaptational potential of these species.
Modelling
To build up an integrated unitary model of the temperature-sensitive response of these species from the molecular to the population level.
This combination of retrospective studies, field data analysis, physiological experiments, genetical investigations and modelling will further our understanding of the past and present impact of climate induced temperature changes on fish populations. The results will allow us to make better projections with respect to future anticipated global warming
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