Early to late summer fish distribution in a bay of the Gulf of Bothnia
This study examined the fish community in a shallow bay in the Gulf of Bothnia during the summer of 2007. The distribution of several fishsh species within the bay was investigated. Possible influence on trout is discussed. Fish was sampled eight times at three different areas of the bay starti...
| Autor principal: | |
|---|---|
| Formato: | L3 |
| Lenguaje: | Inglés sueco |
| Publicado: |
SLU/Dept. of Wildlife, Fish and Environmental Studies
2008
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| Materias: |
| _version_ | 1855572027021197312 |
|---|---|
| author | Kagervall, Anders |
| author_browse | Kagervall, Anders |
| author_facet | Kagervall, Anders |
| author_sort | Kagervall, Anders |
| collection | Epsilon Archive for Student Projects |
| description | This study examined the fish community in a shallow bay in the Gulf
of Bothnia during the summer of 2007. The distribution of several fishsh
species within the bay was investigated. Possible influence on trout is
discussed.
Fish was sampled eight times at three different areas of the bay
starting 4th of June and ending 7th of September. The fish was sampled
with multimesh gillnets and horizontal echosounding.
I found that the bay was dominated by three freshwater species, roach,
perch and ruffe with no apparent effect of season on their distribution.
However, the abundance of roach in the outer area changed significantly
with low abundance early in the summer and high abundance late
summer and autumn. The overall high abundance of warm water species
in trout feeding areas could potentially have a negative effect on trout
through feeding competition. |
| format | L3 |
| id | RepoSLU12242 |
| institution | Swedish University of Agricultural Sciences |
| language | Inglés swe |
| publishDate | 2008 |
| publishDateSort | 2008 |
| publisher | SLU/Dept. of Wildlife, Fish and Environmental Studies |
| publisherStr | SLU/Dept. of Wildlife, Fish and Environmental Studies |
| record_format | eprints |
| spelling | RepoSLU122422017-11-01T12:56:30Z Early to late summer fish distribution in a bay of the Gulf of Bothnia Förändring av fisksamhället i en vik i Bottenviken under en sommar Kagervall, Anders Bothnian bay brackish-water temporal variation multimesh gillnet perch roach ruffe trout This study examined the fish community in a shallow bay in the Gulf of Bothnia during the summer of 2007. The distribution of several fishsh species within the bay was investigated. Possible influence on trout is discussed. Fish was sampled eight times at three different areas of the bay starting 4th of June and ending 7th of September. The fish was sampled with multimesh gillnets and horizontal echosounding. I found that the bay was dominated by three freshwater species, roach, perch and ruffe with no apparent effect of season on their distribution. However, the abundance of roach in the outer area changed significantly with low abundance early in the summer and high abundance late summer and autumn. The overall high abundance of warm water species in trout feeding areas could potentially have a negative effect on trout through feeding competition. Denna studie undersökte fisksamhället i en grund vik i Bottenviken under sommaren 2007. Förändring av distribution, i både tid och rum, undersöktes för flera fiskarter. Eventuella effekter på öring diskuteras. Fiske med nordiska översiktsnät utfördes på tre olika områden i viken. Fisket startades fjärde juni och avslutades sjunde september. Vid varje fisketillfälle gjordes en inspelning med ett horisontellt ekolod på varje fiskeplats. Studien visar att viken domineras av tre sötvattensarter, mört, abborre och gers. Tätheten av mört, i vikens yttre område, förändrades signifikant under studien, från låg i början till hög på slutet. Den höga tätheten av fisk i ytterområdet kan potentiellt ha effekt på öring genom födokonkurens. SLU/Dept. of Wildlife, Fish and Environmental Studies 2008 L3 eng swe https://stud.epsilon.slu.se/12242/ |
| spellingShingle | Bothnian bay brackish-water temporal variation multimesh gillnet perch roach ruffe trout Kagervall, Anders Early to late summer fish distribution in a bay of the Gulf of Bothnia |
| title | Early to late summer fish distribution in a bay of the Gulf of Bothnia |
| title_full | Early to late summer fish distribution in a bay of the Gulf of Bothnia |
| title_fullStr | Early to late summer fish distribution in a bay of the Gulf of Bothnia |
| title_full_unstemmed | Early to late summer fish distribution in a bay of the Gulf of Bothnia |
| title_short | Early to late summer fish distribution in a bay of the Gulf of Bothnia |
| title_sort | early to late summer fish distribution in a bay of the gulf of bothnia |
| topic | Bothnian bay brackish-water temporal variation multimesh gillnet perch roach ruffe trout |