Context

Among other effects, pressures of human activities disrupt the biodiversity of aquatic ecosystems, which may jeopardis the services that these ecosystems provide to human societies (Amigues & Chevassus-au-Louis, 2011). There are multiples types of pressures : overexploitation of resources, reduced flows, eutrophication, chemical pollution, biological invasions, pathogens, habitat degradation, loss of connectivity, climate change, etc.

In this context, the tissues samples in Colisa, which 'record' fish life-history traits (age, migration, size, reproduction) and contain DNA, support the research conducted on these species, with the aim of producing knowledge to conserve and manage them. These subjects are addressed by a combining approaches in population dynamics, genetics and trophic ecology.
   

The samples can be used to genetically describe the individuals or populations concerned, analyse them retrospectively (historical samples) in light of global or local changes and thus assess their effects on the demographics and genetics of fish populations.

In addition, microchemical, analysis of these tissues can assess trophic interactions and energy transfers (within and between ecosystems), to examine the environmental conditions in which these fish lived and thus assess long-term effects of these conditions on fish populations.

To find out more about using samples :