loadingFish Conservation and
Management
CONS 486
Trophic pyramids, food webs, and trophic
cascades… oh my!
Ross Chapter 2, Diana Chapter 1
Trophic interactions
?Limnological classification review?Trophic pyramids and productivity
–Food webs
?Trophic cascades
–Examples
Major theme: Linking science to conservation & management
?????PhysiologyBehaviourPopulation ecologyEcosystem ecologyHabitat data (limnology, oceanography)?Life history?Fisheries exploitation data?Applied life history data?Human dimensions: socio-economic dataBasic scienceApplied science?Protecting populations & habitats?Restoring populations & habitatsConservationManagement?Harvest regulations?Managing fisheries & habitatsIntroduction
?To conserve fish, it’s not enough to only understand how individual species may compete or prey upon
–Must also take a larger view and consider how communities (groups of species) interact
?Trophic level interactions can differ among different aquatic systems
–E.g., epilimnetic vs hypolimnetic systems–Low order vs high order stream systems, etc.
?Very exciting review of limnological terms and locations!
Lake Zonation
or Pelagic zone
Cole 1983