Introduction and extinction of brown trout (Salmo trutta L.) in an impoverished subantarctic stream
Brown trout were introduced to the Van den Boogaard River on subantarctic Marion Island in 1964, and a small population became established. The last individual was seen in 1984, and the species is now considered to be extinct on the island. Their diet was exclusively allochthonous, with snails and s...
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Antarctic Science
1992
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ftrhodesunivcory:vital:6767 2024-06-09T07:47:38+00:00 Introduction and extinction of brown trout (Salmo trutta L.) in an impoverished subantarctic stream Cooper, J Crafford, J E Hecht, Thomas 1992 6 pages http://hdl.handle.net/10962/d1008044 https://corycommons.ru.ac.za/vital/access/manager/Repository/vital:6767 English eng Antarctic Science vital:6767 https://corycommons.ru.ac.za/vital/access/manager/Repository/vital:6767 http://hdl.handle.net/10962/d1008044 Anadromous fishes -- Marion Island Article 1992 ftrhodesunivcory 2024-05-16T14:25:24Z Brown trout were introduced to the Van den Boogaard River on subantarctic Marion Island in 1964, and a small population became established. The last individual was seen in 1984, and the species is now considered to be extinct on the island. Their diet was exclusively allochthonous, with snails and spiders predominating. Ages estimated at six to eleven years showed that spawning must have occurred since the original introduction. Since the Van den Boogaard River enters the sea via a waterfall, it is postulated that trout were not able to practice an anadromous life-style, and that this, as well as other factors connected with the impoverished nature of the stream, led to dwarfing of the resident population. No further introductions of alien fish to Marion Island should be contemplated. Article in Journal/Newspaper Marion Island Rhodes University Cory: Repository |
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Anadromous fishes -- Marion Island |
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Anadromous fishes -- Marion Island Cooper, J Crafford, J E Hecht, Thomas Introduction and extinction of brown trout (Salmo trutta L.) in an impoverished subantarctic stream |
topic_facet |
Anadromous fishes -- Marion Island |
description |
Brown trout were introduced to the Van den Boogaard River on subantarctic Marion Island in 1964, and a small population became established. The last individual was seen in 1984, and the species is now considered to be extinct on the island. Their diet was exclusively allochthonous, with snails and spiders predominating. Ages estimated at six to eleven years showed that spawning must have occurred since the original introduction. Since the Van den Boogaard River enters the sea via a waterfall, it is postulated that trout were not able to practice an anadromous life-style, and that this, as well as other factors connected with the impoverished nature of the stream, led to dwarfing of the resident population. No further introductions of alien fish to Marion Island should be contemplated. |
format |
Article in Journal/Newspaper |
author |
Cooper, J Crafford, J E Hecht, Thomas |
author_facet |
Cooper, J Crafford, J E Hecht, Thomas |
author_sort |
Cooper, J |
title |
Introduction and extinction of brown trout (Salmo trutta L.) in an impoverished subantarctic stream |
title_short |
Introduction and extinction of brown trout (Salmo trutta L.) in an impoverished subantarctic stream |
title_full |
Introduction and extinction of brown trout (Salmo trutta L.) in an impoverished subantarctic stream |
title_fullStr |
Introduction and extinction of brown trout (Salmo trutta L.) in an impoverished subantarctic stream |
title_full_unstemmed |
Introduction and extinction of brown trout (Salmo trutta L.) in an impoverished subantarctic stream |
title_sort |
introduction and extinction of brown trout (salmo trutta l.) in an impoverished subantarctic stream |
publisher |
Antarctic Science |
publishDate |
1992 |
url |
http://hdl.handle.net/10962/d1008044 https://corycommons.ru.ac.za/vital/access/manager/Repository/vital:6767 |
genre |
Marion Island |
genre_facet |
Marion Island |
op_relation |
vital:6767 https://corycommons.ru.ac.za/vital/access/manager/Repository/vital:6767 http://hdl.handle.net/10962/d1008044 |
_version_ |
1801378876915449856 |