Do exotic salmonids feed on native fauna after escaping from aquaculture cages in Tasmania, Australia?
Atlantic salmon, Salmo salar , and rainbow trout, Oncorhynchus mykiss , are farmed in Tasmania, Australia, where fish sometimes escape into the natural environment. If escapees are able to survive and feed on native fauna, it is likely that they will have ecosystem impacts. Stomach content, body con...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
---|---|
Main Authors: | , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
2011
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/f2011-057 http://www.nrcresearchpress.com/doi/full-xml/10.1139/f2011-057 http://www.nrcresearchpress.com/doi/pdf/10.1139/f2011-057 |
id |
crcansciencepubl:10.1139/f2011-057 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/f2011-057 2024-09-09T19:30:43+00:00 Do exotic salmonids feed on native fauna after escaping from aquaculture cages in Tasmania, Australia? Abrantes, Kátya Gisela Lyle, Jeremy Martin Nichols, Peter D. Semmens, Jayson Mark Trudel, Marc 2011 http://dx.doi.org/10.1139/f2011-057 http://www.nrcresearchpress.com/doi/full-xml/10.1139/f2011-057 http://www.nrcresearchpress.com/doi/pdf/10.1139/f2011-057 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 68, issue 9, page 1539-1551 ISSN 0706-652X 1205-7533 journal-article 2011 crcansciencepubl https://doi.org/10.1139/f2011-057 2024-06-20T04:11:57Z Atlantic salmon, Salmo salar , and rainbow trout, Oncorhynchus mykiss , are farmed in Tasmania, Australia, where fish sometimes escape into the natural environment. If escapees are able to survive and feed on native fauna, it is likely that they will have ecosystem impacts. Stomach content, body condition (muscle lipid content and Fulton’ K), stable isotope, and fatty acid analysis were used to determine if escaped salmonids feed on native fauna. Results indicate that, in general, escaped salmonids do not feed on native fauna. Salmonids loose condition after escaping, and escapee stomachs were mostly empty or contained non-nutritious material or feed pellets. Nevertheless, almost a quarter of rainbow trout stomachs contained native fauna. The majority of escapees had biochemical composition similar to caged animals, indicating that these fish had not switched to feed on local food sources. However, a small fraction of escapees conclusively showed changes in biochemical parameters indicative of a shift to feeding on native fauna. Given the numbers and frequency of escapes, this can have an important impact on native species and on the ecology of Macquarie Harbour. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing Fulton ENVELOPE(-144.900,-144.900,-76.883,-76.883) Canadian Journal of Fisheries and Aquatic Sciences 68 9 1539 1551 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Atlantic salmon, Salmo salar , and rainbow trout, Oncorhynchus mykiss , are farmed in Tasmania, Australia, where fish sometimes escape into the natural environment. If escapees are able to survive and feed on native fauna, it is likely that they will have ecosystem impacts. Stomach content, body condition (muscle lipid content and Fulton’ K), stable isotope, and fatty acid analysis were used to determine if escaped salmonids feed on native fauna. Results indicate that, in general, escaped salmonids do not feed on native fauna. Salmonids loose condition after escaping, and escapee stomachs were mostly empty or contained non-nutritious material or feed pellets. Nevertheless, almost a quarter of rainbow trout stomachs contained native fauna. The majority of escapees had biochemical composition similar to caged animals, indicating that these fish had not switched to feed on local food sources. However, a small fraction of escapees conclusively showed changes in biochemical parameters indicative of a shift to feeding on native fauna. Given the numbers and frequency of escapes, this can have an important impact on native species and on the ecology of Macquarie Harbour. |
author2 |
Trudel, Marc |
format |
Article in Journal/Newspaper |
author |
Abrantes, Kátya Gisela Lyle, Jeremy Martin Nichols, Peter D. Semmens, Jayson Mark |
spellingShingle |
Abrantes, Kátya Gisela Lyle, Jeremy Martin Nichols, Peter D. Semmens, Jayson Mark Do exotic salmonids feed on native fauna after escaping from aquaculture cages in Tasmania, Australia? |
author_facet |
Abrantes, Kátya Gisela Lyle, Jeremy Martin Nichols, Peter D. Semmens, Jayson Mark |
author_sort |
Abrantes, Kátya Gisela |
title |
Do exotic salmonids feed on native fauna after escaping from aquaculture cages in Tasmania, Australia? |
title_short |
Do exotic salmonids feed on native fauna after escaping from aquaculture cages in Tasmania, Australia? |
title_full |
Do exotic salmonids feed on native fauna after escaping from aquaculture cages in Tasmania, Australia? |
title_fullStr |
Do exotic salmonids feed on native fauna after escaping from aquaculture cages in Tasmania, Australia? |
title_full_unstemmed |
Do exotic salmonids feed on native fauna after escaping from aquaculture cages in Tasmania, Australia? |
title_sort |
do exotic salmonids feed on native fauna after escaping from aquaculture cages in tasmania, australia? |
publisher |
Canadian Science Publishing |
publishDate |
2011 |
url |
http://dx.doi.org/10.1139/f2011-057 http://www.nrcresearchpress.com/doi/full-xml/10.1139/f2011-057 http://www.nrcresearchpress.com/doi/pdf/10.1139/f2011-057 |
long_lat |
ENVELOPE(-144.900,-144.900,-76.883,-76.883) |
geographic |
Fulton |
geographic_facet |
Fulton |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 68, issue 9, page 1539-1551 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f2011-057 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
68 |
container_issue |
9 |
container_start_page |
1539 |
op_container_end_page |
1551 |
_version_ |
1809899695303032832 |