Native Inland Trout Restoration on National Forests in the Western United States

Finlayson, Brian; Somer, William L.; Duffield, Dan; Propst, David L.; Mellison, Chad; Pettengill, Tom; Sexauer, Hilda; Nesler, Tom; Gurtin, Scott D.; Elliot, J. R.; Partridge, Fred; Skaar, Don

doi:10.1577/1548-8446(2005)30[10:nitron]2.0.co;2

Cited by 32 publications

(40 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Brook trout has been introduced throughout the world, with serious consequences on native stream biota [20,[35][36][37]. For example, certain subspecies of the native cutthroat trout (Oncorhynchus clarkii) are on the brink of extinction due to the extensive spread of the alien brook trout in western North America [36,37].…”

Section: Discussionmentioning

confidence: 99%

“…For example, certain subspecies of the native cutthroat trout (Oncorhynchus clarkii) are on the brink of extinction due to the extensive spread of the alien brook trout in western North America [36,37]. It should be possible, through niche matching, to predict the invasion success of brook trout, and thus to better assess the risks involved in introducing this species to various stream systems.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Specific Niche Characteristics Facilitate the Invasion of an Alien Fish Invader in Boreal Streams

Korsu¹,

Heino

Huusko³

et al. 2012

International Journal of Ecology

View full text Add to dashboard Cite

We studied the ecological niche relations of native stream fish and an alien invader, brook trout (Salvelinus fontinalis), to examine if brook trout had located an underused environmental niche in our boreal study system. In both study years (1994 versus 2004), we found brook trout to have the most marginal niche position of all the fish species examined. The most important environmental variable affecting the distribution of brook trout was pH, with acid headwater sites being dominated by this species. Brown trout, in contrast, had relatively nonmarginal niche, occurring in average conditions across the sampled sites. Other fish species had niche positions between the two salmonids. Our results show that fish invasions may be strongly facilitated by the presence of suboptimally occupied environmental niche space in the recipient river system.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Specific Niche Characteristics Facilitate the Invasion of an Alien Fish Invader in Boreal Streams

Korsu¹,

Heino

Huusko³

et al. 2012

International Journal of Ecology

View full text Add to dashboard Cite

show abstract

“…Because brook trout clearly have the ability to outcompete many of the native salmonids in the western United States, a removal project that merely seeks to reduce brook trout density or that occurs over large stream lengths with little hope for total eradication would seem a costly but quixotic enterprise. Like Finlayson et al (2005), we believe other methods (e.g., use of chemical treatments with rotenone and antimycin) would be more cost effective and successful at completely eradicating brook trout under most circumstances. Those who continue to use electrofishing for brook trout eradication may better illuminate the usefulness of the technique by quantitatively monitoring project cost effectiveness and fish population response.…”

mentioning

confidence: 93%

“…Meronek et al (1996) reviewed 250 fish control projects and found that the goals of reducing or eliminating undesirable fish species were met in less than 50% of these projects. Nevertheless, the lack of alternatives to removal and the need to contain exotics such as brook trout compel many biologists to continue implementing fish control projects (Finlayson et al 2005).…”

mentioning

confidence: 99%

Evaluation of an Unsuccessful Brook Trout Electrofishing Removal Project in a Small Rocky Mountain Stream

Meyer

Lamansky

Schill

2006

N American J Fish Manag

108

View full text Add to dashboard Cite

Abstract.-In the western United States, exotic brook trout Salvelinus fontinalis frequently have a deleterious effect on native salmonids, and biologists often attempt to remove brook trout from streams by means of electrofishing. Although the success of such projects typically is low, few studies have assessed the underlying mechanisms of failure, especially in terms of compensatory responses. A multiagency watershed advisory group (WAG) conducted a 3-year removal project to reduce brook trout and enhance native salmonids in 7.8 km of a southwestern Idaho stream. We evaluated the costs and success of their project in suppressing brook trout and looked for brook trout compensatory responses, such as decreased natural mortality, increased growth, increased fecundity at length, and earlier maturation. The total number of brook trout removed was 1,401 in 1998, 1,241 in 1999, and 890 in 2000; removal constituted an estimated 88% of the total number of brook trout in the stream in 1999 and 79% in 2000. Although abundance of age-1 and older brook trout declined slightly during and after the removals, abundance of age-0 brook trout increased 789% in the entire stream 2 years after the removals ceased. Total annual survival rate for age-2 and older brook trout did not decrease during the removals, and the removals failed to produce an increase in the abundance of native redband trout Oncorhynchus mykiss gairdneri. Lack of a meaningful decline and unchanged total mortality for older brook trout during the removals suggest that a compensatory response occurred in the brook trout population via reduced natural mortality, which offset the removal of large numbers of brook trout. Although we applaud WAG personnel for their goal of enhancing native salmonids by suppressing brook trout via electrofishing removal, we conclude that their efforts were unsuccessful and suggest that similar future projects elsewhere over such large stream lengths would be costly, quixotic enterprises.

show abstract

“…Apart from factors such as predation and hybridization, by which alien salmonids affect populations of native species, interspecific competition is of great importance (Kitano et al, 1994;Nakano et al, 1998;Taniguchi et al, 2002;Finlayson et al, 2005). Competition for limited resources is more likely to occur in populations of species that are not naturally sympatric (Hearn, 1987).…”

Section: Introductionmentioning

confidence: 99%

Feeding habits of the alien brook trout Salvelinus fontinalis and the native brown trout Salmo trutta in Czech mountain streams

Horká

Sychrová

Horký

et al. 2017

Knowl. Manag. Aquat. Ecosyst.

View full text Add to dashboard Cite

-Quantifying patterns of prey resource use is fundamental to identify mechanisms enabling the coexistence of related fish species. Trophic interactions between the native brown trout, Salmo trutta, and the introduced brook trout, Salvelinus fontinalis, were studied monthly from May to October in three mountain streams in Central Europe (Czech Republic). To evaluate whether the feeding habits differ between separated and coexisting populations of these species, one locality where both species coexist, and two allopatric populations of either species were studied. Across the study period, the mean stomach fullness of fish varied, being highest in spring and declining through autumn. The diet overlap (Schoener's overlap index) between the species increased through the studied season (from 54.5% in July to 81.5% in October). In allopatry, both species had nearly the same feeding habits. However, in sympatry, brook trout consumed higher proportion of terrestrial invertebrates, while brown trout showed no changes either in the proportions of aquatic and terrestrial prey utilized or in the selectivity for prey categories in comparison to allopatric conditions. The dietary shift observed for brook trout, but not for brown trout, suggests that brown trout is a stronger competitor in the studied sympatric locality, leading the brook trout to change its feeding habits to reduce interspecific competition.Keywords: feeding behaviour / salmonids / coexistence / overlap / diet Résumé -Habitudes alimentaires de l'omble de fontaine exogène Salvelinus fontinalis et de la truite indigène Salmo trutta dans les ruisseaux de montagne tchèques. La quantification des modes d'utilisation des ressources est essentielle pour identifier les mécanismes permettant la coexistence d'espèces de poissons proches. Les interactions trophiques entre la truite brune indigène, Salmo trutta et l'omble de fontaine introduit, Salvelinus fontinalis, ont été étudiées mensuellement de mai à octobre dans trois cours d'eau de montagne en Europe centrale (République tchèque). Pour évaluer si les habitudes alimentaires diffèrent entre les populations séparées et coexistantes de ces espèces, une localité où les deux espèces coexistent et deux populations allopatriques de l'une ou l'autre espèce ont été étudiées. Au cours de la période étudiée, la plénitude gastrique moyenne des poissons a varié, étant la plus élevée au printemps et diminuant à l'automne. Le chevauchement du régime (indice de chevauchement de Schoener) entre les espèces a augmenté au cours de la saison étudiée (de 54,5 % en juillet à 81,5 % en octobre). En allopatrie, les deux espèces avaient pratiquement les mêmes habitudes alimentaires. Cependant, en sympatrie, l'omble de fontaine a consommé une proportion plus élevée d'invertébrés terrestres, tandis que la truite brune n'a montré aucun changement ni dans les proportions de proies aquatiques et terrestres utilisées ni dans la sélectivité pour les catégories de proies en comparaison aux conditions allopatriques. Le changement de régime...

show abstract

Native Inland Trout Restoration on National Forests in the Western United States

Cited by 32 publications

References 19 publications

Specific Niche Characteristics Facilitate the Invasion of an Alien Fish Invader in Boreal Streams

Specific Niche Characteristics Facilitate the Invasion of an Alien Fish Invader in Boreal Streams

Evaluation of an Unsuccessful Brook Trout Electrofishing Removal Project in a Small Rocky Mountain Stream

Feeding habits of the alien brook trout Salvelinus fontinalis and the native brown trout Salmo trutta in Czech mountain streams

Contact Info

Product

Resources

About