We used Woods Population Surface Method to estimate stage-specific mortality rates for populations of Calanus finmarchicus, Pseudocalanus elongatus, and Oithona similis from abundance data obtained during the Fladen Ground Experiment (FLEX 1976) in the northern North Sea. Temperatures from the day and night depth distributions of each developmental stage were used to force temperature functions...

The amphipod fauna of Central Europe has changed dramatically over the last century. This change increased past 30 years. dynamic is well documented in northeast Germany. study places it a landscape-ecological context. An example displacement Gammarus lacustris G.O. Sars, 1864, circumpolar species with variety habitats, but relegated to relic habitats. turns out be very weak competitor. Already...

Experimental work has been carried out to optimize the feeding conditions and keeping of red claw crayfish in a recirculation aquaculture system (RAS) increase growth during artificial cultivation determine design standards. The lack functional complete feed methodological approaches maintenance necessitated developing effective methods for practical implementation technology minimizing impact ...

Abstract Foundation species, and the roles that they play in structuring ecosystems, are threatened by global change. For example, charophytes a refuge for zooplankton stabilize sediments, but also food source various animal species (water birds, fishes, invertebrates). Particularly, introduction of new such as Gammarus tigrinus , into Baltic Sea led to yet not understood changes web. Furthermo...