Sökning: "Three-spined stickleback"
Visar resultat 1 - 5 av 9 uppsatser innehållade orden Three-spined stickleback.
1. Diet hos lax (Salmo salar) och öring (Salmo trutta) i Vänern: Kompletterande perspektiv i en ekosystembaserad fiskförvaltning
Master-uppsats, Karlstads universitet/Institutionen för miljö- och livsvetenskaper (from 2013)Sammanfattning : Kunskap om fiskars diet är viktigt för att kunna bedriva en ekosystembaserad fiskförvaltning. I Sveriges största sjö Vänern lever glacialrelikta stammar av lax (Salmo salar) och öring (Salmo trutta) som enligt Natura 2000 har särskilt bevarandevärde och därför är föremål för riktade förvaltningsåtgärder. LÄS MER
2. The effects of eutrophication and browning on prey availability and performance of the three-spined stickleback (Gasterosteus aculeatus)
Master-uppsats, SLU/Dept. Of Aquatic ResourcesSammanfattning : Shallow coastal areas often have high productivity and diversity, in part due to the high availability of light and nutrients. At the same time, they are exposed to multiple environmental pressures, such as browning and eutrophication. LÄS MER
3. Influence of reed (Phragmites australis) belts in the Baltic Sea archipelago on pike (Esox lucius) and other coastal fish species
Master-uppsats, SLU/Dept. Of Aquatic ResourcesSammanfattning : Eutrophication, near shore building and human disturbances by dredging and shore alteration have led to increased expansion of the common reed (Phragmites australis) in the archipelago of the Baltic Sea. Reed has an important ecological function such as nursery habitat for many fish species. LÄS MER
4. Stickleback diets in bays along the northen Baltic Sea
Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskapSammanfattning : Coastal populations of perch (Perca fluviatilis) in the Baltic Sea has declined substantially the last decades while the populations of three-spined sticklebacks (Gasterosteus aculeatus) has increased rapidly during the same time period. Earlier studies have suggested that predation on perch larvae and or competition from sticklebacks are the causes behind the decline in perch. LÄS MER
5. Effect of temporal increases in prey fish abundance on individual growth rates of coastal piscivores
Master-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskapSammanfattning : Commercial fishing in the Baltic Sea has led to decrease in abundance of large predatory fish and as a result the predation pressure on smaller fish species has been reduced. Three-spined stickleback (Gasterosteus aculeatus) is among the species that have benefited from reduced predation pressure. LÄS MER