Sökning: "Passive Integrated Transponder"
Hittade 5 uppsatser innehållade orden Passive Integrated Transponder.
1. Aspects of erosion of restored trout spawning beds in two streams in Northern Sweden
Master-uppsats, SLU/Dept. of Wildlife, Fish and Environmental StudiesSammanfattning : Many rivers and streams in northern Sweden have been channelized due to timber floating. This has severely degraded the spawning habitats for salmon and trout, and therefore a common action when restoring channelized rivers is to establish new spawning beds by adding gravel to the streambed. LÄS MER
2. Phenotypic correlates of spawning migration behaviour for roach (Rutilus rutilus) and ide (Leuciscus idus) in the stream Oknebäcken, Sweden.
Kandidat-uppsats, Linnéuniversitetet/Institutionen för biologi och miljö (BOM)Sammanfattning : Migration occurs among many animal species for the purpose of, among other things, finding food or to reproduce. Spawning migration is a form of migration that occurs among many fish species where they move to another site for reproduction. The movement can be obstructed by migration barriers like road culverts. LÄS MER
3. Hur utvärderas faunapassager? - En litteraturstudie om säkra passager för djur över vägar och hur de utvärderas
Kandidat-uppsats, Lunds universitet/Miljövetenskaplig utbildningSammanfattning : Habitat fragmentation is a common problem in relation with road infrastructure which leads to mortality, isolation of animal populations, and has a negative effect on biodiversity. Animal crossings have been implemented in many countries and are a useful tool to mitigate these problems but they are expensive to build. LÄS MER
4. Storskarvens (Phalacrocorax carbo spp.) predation på Krankesjöns partiellt migrerande fiskpopulation
Kandidat-uppsats, Lunds universitet/Miljövetenskaplig utbildningSammanfattning : Partial migration, when only parts of a population migrate and others stay resident, is a common phenomenon in nature. The underlying explanation for the behavioural differences within a population remains a research question and several recent studies have highlighted the role of predation. LÄS MER
5. Passage efficiency and migration behavior for adult Atlantic salmon at a Half-Ice Harbor fish ladder
Master-uppsats, SLU/Dept. of Wildlife, Fish and Environmental StudiesSammanfattning : Due to exploitation of the world’s rivers, the upstream migration of anadromous species is frequently delayed or even prevented. To mitigate these problems and allow fish to migrate past obstacles, structures such as fish ladders have been developed. However, recent studies show that many of the present fish passage facilities are deficient. LÄS MER
