Difference between revisions of "Brown Trout"
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| − | A telemetry study showing that '''fall floods trigger upstream spawning migrations in brown trout.''' [https://link.springer.com/chapter/10.1007%2F978-94-011-5090-3_30 Environmental unpredictability rules the autumn migration of brown trout (Salmo trutta L.) in the Belgian Ardennes] Advances in Invertebrates and Fish Telemetry, Volume 130 of the series Developments in Hydrobiology pp 263-274 | + | *A telemetry study showing that '''fall floods trigger upstream spawning migrations in brown trout.''' [https://link.springer.com/chapter/10.1007%2F978-94-011-5090-3_30 Environmental unpredictability rules the autumn migration of brown trout (Salmo trutta L.) in the Belgian Ardennes] Advances in Invertebrates and Fish Telemetry, Volume 130 of the series Developments in Hydrobiology pp 263-274 |
| − | [http://web.b.ebscohost.com/abstract?direct=true&profile=ehost&scope=site&authtype=crawler&jrnl=17986540&AN=97363287&h=a4WVC6zWlS7kfpE47mLeQaiZ8uWspeW63uKCHkuB8CkvQ3%2bFuE9%2b%2ba3hTiNYXRqSiD0l3Mjh7Spx84R7APtC1g%3d%3d&crl=c&resultNs=AdminWebAuth&resultLocal=ErrCrlNotAuth&crlhashurl=login.aspx%3fdirect%3dtrue%26profile%3dehost%26scope%3dsite%26authtype%3dcrawler%26jrnl%3d17986540%26AN%3d97363287 Hasegawa, K., N. Ishiyama, H. Kawai. 2014. '''Replacement of nonnative rainbow trout by nonnative brown trout''' in the Chitose River system, Hokkaido, northern Japan. Aquatic Invasions. Vol. 9 Issue 2, p221-226. 6p.] | + | *[http://web.b.ebscohost.com/abstract?direct=true&profile=ehost&scope=site&authtype=crawler&jrnl=17986540&AN=97363287&h=a4WVC6zWlS7kfpE47mLeQaiZ8uWspeW63uKCHkuB8CkvQ3%2bFuE9%2b%2ba3hTiNYXRqSiD0l3Mjh7Spx84R7APtC1g%3d%3d&crl=c&resultNs=AdminWebAuth&resultLocal=ErrCrlNotAuth&crlhashurl=login.aspx%3fdirect%3dtrue%26profile%3dehost%26scope%3dsite%26authtype%3dcrawler%26jrnl%3d17986540%26AN%3d97363287 Hasegawa, K., N. Ishiyama, H. Kawai. 2014. '''Replacement of nonnative rainbow trout by nonnative brown trout''' in the Chitose River system, Hokkaido, northern Japan. Aquatic Invasions. Vol. 9 Issue 2, p221-226. 6p.] |
| − | Study showing that '''late summer floods may be advantageous for brown trout recruitment.''' [https://www.researchgate.net/publication/291522945_Effects_of_extreme_floods_on_trout_populations_and_fish_communities_in_a_Catskill_Mountain_river S.D. George, B.P. Baldigo, A.J. Smith, and G.R. Robinson. 2016. Effects of extreme floods on trout populations and fish communities in a Catskill Mountain river. Freshwater Biology.] | + | *Study showing that '''late summer floods may be advantageous for brown trout recruitment.''' [https://www.researchgate.net/publication/291522945_Effects_of_extreme_floods_on_trout_populations_and_fish_communities_in_a_Catskill_Mountain_river S.D. George, B.P. Baldigo, A.J. Smith, and G.R. Robinson. 2016. Effects of extreme floods on trout populations and fish communities in a Catskill Mountain river. Freshwater Biology.] |
| − | "The divergent responses of brown trout and rainbow trout populations to the summer flood could be explained by competitive interactions. Brown trout are autumn spawners, whereas rainbow trout are spring spawners, and thus, YOY brown trout emerge earlier, are larger and may outcompete YOY rainbow trout (Gatz, Sale & Loar, 1987; Strange et al., 1992 ). '''Conversely , the autumn spawning of brown trout increases the risk of egg loss if autumn or winter floods occur.''' Several investigations showed that YOY brown trout or brook trout were generally more numerous than YOY rainbow trout except during years when floods scoured the eggs of the autumn spawners (Seegrist & Gard, 1972; Strange et al., 1992; Warren et al., 2009 ). " [https://www.researchgate.net/publication/291522945_Effects_of_extreme_floods_on_trout_populations_and_fish_communities_in_a_Catskill_Mountain_river] | + | *"The divergent responses of brown trout and rainbow trout populations to the summer flood could be explained by competitive interactions. Brown trout are autumn spawners, whereas rainbow trout are spring spawners, and thus, YOY brown trout emerge earlier, are larger and may outcompete YOY rainbow trout (Gatz, Sale & Loar, 1987; Strange et al., 1992 ). '''Conversely , the autumn spawning of brown trout increases the risk of egg loss if autumn or winter floods occur.''' Several investigations showed that YOY brown trout or brook trout were generally more numerous than YOY rainbow trout except during years when floods scoured the eggs of the autumn spawners (Seegrist & Gard, 1972; Strange et al., 1992; Warren et al., 2009 ). " [https://www.researchgate.net/publication/291522945_Effects_of_extreme_floods_on_trout_populations_and_fish_communities_in_a_Catskill_Mountain_river] |
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Revision as of 11:45, 21 March 2017
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Brown TroutBrown trout are native to Europe and were introduced to tributaries in the Grand Canyon in the 1920s. They are capable of withstanding slightly higher temperature than rainbow trout. Unlike most other trout species, brown trout spawn in the late fall. Their spawning behavior, however, is similar to other trout species. Like rainbow trout, young brown trout feed on aquatic and terrestrial insects and invertebrates but brown trout are more apt to switch to eating other fish as they get bigger. The rainbow trout found in Grand Canyon are more likely to continue to eat mostly insects and invertebrates even as adults. [1] (2) Studies have shown that rainbow trout and native fish like humpback chub often have a difficult time persisting in the presence of a large population of brown trout. [2] [3] [4] Desired Future Condition for the Lees Ferry Trout FisheryA high quality trout fishery in GCNRA, as further described in the Recreation DFC that does not adversely affect the native aquatic community in GCNP. |
| File:RainbowTrout1.jpg* Rainbow Trout |
File:BrownTrout1.jpg* Brown Trout |
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