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Found 2 essays matching the above criteria.

1. 1. Changes in the fish community in Lake Tåkern, Sweden - a comparison between 1978-1979 and 2019

   University essay from Linköpings universitet/Biologi

   Author : Manfred Skog; [2020]
   Keywords : Fish community; Shallow lakes; Test-fishing; Establishment of species; Crucian carp; Bream; Winter hypoxia;

   Abstract : Climate changes alter species composition in both aquatic and terrestrial ecosystems. For establishment of species in a fish community, dispersal barriers, habitat structure and interactions between species act as a filter. READ MORE

3. 2. An ecological study of the migration, food composition and relative abundance of three-spined stickleback (Gasterosteus aculeatus) in a shallow area in Kalmar Sound.

   University essay from Linnéuniversitetet/Institutionen för biologi och miljö (BOM)

   Author : Peter Söderling; [2013]
   Keywords : Three-spined stickleback; Gasterosteus aculeatus; migration; abundance; population; decline; increase; food; prey; predate; pike; perch; roach; spring; spawn; recruitment; shallow; Kalmar; Baltic; Storspigg; spigg; vandring; förekomst; population; populationsökning; populationsminskning; föda; byte; predera; predator; gädda; abborre; mört; vår; vårlekande; föryngring; lek; grunt; Kalmar; Kalmarsund; Östersjön;

   Abstract : The populations of three–spined sticklebacks (Gasterosteus aculeatus) in the Baltic Sea have increased tenfold over the last decade. A large increase in abundance can alter the offshore and coastal food webs. READ MORE