Essays about: "fyke nets"

Found 3 essays containing the words fyke nets.

  1. 1. Consequences on population dynamics following regained connectivity in pike (Esox lucius) spawning location

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

    Author : Oscar Adolfsson; [2020]
    Keywords : dmixture; emigration; downstream spawning; pike-factory; restoration; sourcesink dynamics; spawning strategy;

    Abstract : Distributional movements of subpopulations may act as a buffer to prevent the loss of a species in a certain area. However, within subpopulations adaptations may evolve that makes the inhabitants of a certain habitat to better cope with prevailing environmental conditions. READ MORE

  3. 2. Sampling methods of the wels catfish (Silurus glanis) in freshwater lakes : management of a vulnerable species

    University essay from SLU/Dept. Of Aquatic Resources

    Author : David Östby; [2018]
    Keywords : sampling; gear; monitoring; Wels catfish; Silurus glanis; management; vulnerable spieces; electrofishing; acoustic camera; fyke nets; lake;

    Abstract : Sweden hosts the northernmost natural population of wels catfish (Silurus glanis) in the world. The populations of the species decreased severely in the 20th century, mainly due to different sources of anthropogenic impact. READ MORE

  4. 3. 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