Sökning: "fiskekologi"

Hittade 2 uppsatser innehållade ordet fiskekologi.

1. 1. Habitatval, migrations- och furageringsaktivitet samt homing hos gädda (Esox lucius) härstammande från Österby myr, Gotland.

   Kandidat-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

   Författare :Rickard Gustafsson; [2014]
   Nyckelord :gädda; fortplantning; lekbeteende; furagering; homing; fiskar; fiskekologi;

   Sammanfattning : In this study the spawning migration activity, habitat choice (depth and temperature), foraging activity, duration of stay in the spawning site and homing-behavior was studied for anadromous pike (Esox lucius) in the wetland Österby myr, Gotland. The spawning migration was concentrated to dusk and dawn, a homing behavior was confirmed and there was no significant difference between sexes with respect to duration of stay. LÄS MER

3. 2. Fredningseffekter och rekryteringsproblem hos abborre (Perca fluviatilis) i Stockholms skärgård

   Kandidat-uppsats, Institutionen för kultur, energi och miljö

   Författare :Karl Magnus Johansson; [2011]
   Nyckelord :Fisk; fiskekologi; fredningseffekter; Östersjön;

   Sammanfattning : Effects of fishery closure on perch was detected as female perch was on average 5 cm longer in closed areas compared to non-closed areas. This could be a result of larger individuals surviving as an effect of reduced fishing. No effect was detected on the reproduction rate of YOY (young of the year) perch. LÄS MER