Potamodromy in SahnonidaeLiving and Moving in the Fast Lane

Northcote, T. G.

doi:10.1577/1548-8675(1997)017<1029:pisami>2.3.co;2

Cited by 165 publications

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“…Stream-dwelling rainbow trout up to age 2 + inhabit streams and are apparently absent in the lake except in spring, whereas lake-dwelling rainbow trout are most frequent in the lake over age 2 + and consist mostly of ages 4 + to 6 + . These results suggest that in our study lake-inlet system, as seen in their native distribution (Northcote, 1997;Quinn and Myers, 2004) and in other naturalized populations in both eastern North America (Youngs and Oglesby, 1972;Seelbach, 1993) and New Zealand (Hayes, 1988;Rosenau, 1991;Graynoth, 1996), most of the rainbow trout spend 1-2 years in the inlet streams and then move downstream to the lake. Thus, our study provides basic information that confirms the life-history strategies seen elsewhere in other ad-fluvial naturalized O. mykiss populations.…”

Section: Discussionsupporting

confidence: 58%

Seasonal age distributions and maturity stage in a naturalized rainbow trout (Oncorhynchus mykissWalbaum) population in southern Chile reveal an ad-fluvial life history

Arisméndi

Sanzana

Soto

2011

Ann. Limnol. - Int. J. Lim.

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-Rainbow trout is one of the most popular introduced game species around the world. Similar patterns of use for lake and inlet streams have been described for both native and introduced populations. However, for many introduced rainbow trout populations, there is a lack of information about how and when those habitats have been used. Here, we hypothesized that the majority of adult and sexually mature individuals inhabit inlet streams during the reproductive period most likely to spawn whereas juvenile trout occupy these same streams as nursery areas most of the year before emigrating to the lake. We studied rainbow trout age distribution and sexual maturity in a lake and its main inlet streams in southern Chile. We found that stream-dwelling individuals inhabited inlet streams up to age 2 + whereas lake-dwelling trout were older (most of them from ages 4 + to 6 + ). During the reproductive period (May to September) older and sexually mature individuals were in both habitats probably indicating movement to upstream locations to spawn. Rainbow trout of the same ages were larger in the lake than in streams, which may imply better growth in the lenthic environment. Our study offers further evidence of the highly adaptable nature of rainbow trout. Future regulations should consider rainbow trout populations in lakes and streams separately because trout life histories suggest that both environments are important to different ontogenic stages. This study provides key information that may be useful in the management of ad-fluvial populations of rainbow trout in Patagonia.

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Section: Discussionsupporting

confidence: 58%

Seasonal age distributions and maturity stage in a naturalized rainbow trout (Oncorhynchus mykissWalbaum) population in southern Chile reveal an ad-fluvial life history

Arisméndi

Sanzana

Soto

2011

Ann. Limnol. - Int. J. Lim.

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“…A classic example of catadromy is the European eel (Anguilla anguilla (L., 1758)), which migrates from its natal habitat in the Sargasso Sea to spend its adult life stages in the rivers and lakes of Europe, before making the return journey to reproduce and then die (Aarestrup et al 2009). Migration between two freshwater habitats is known as "potamodromy" and is less well studied (but see Northcote 1997). Potamodromous fishes may migrate from lakes to streams, as is the case with roach, common bream (Abramis brama (L., 1758)), and white bream (Blicca bjoerkna (L., 1758)) , or may make migrations to different areas of river habitats, as do predatory pikeperch (Sander lucioperca (L., 1758)) (Koed et al 2000).…”

Section: Types Of Migrationmentioning

confidence: 99%

There and back again: migration in freshwater fishes

et al. 2014

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Animal migration is an amazing phenomenon that has fascinated humans for long. Many freshwater fishes also show remarkable migrations, whereof the spectacular mass migrations of salmonids from the spawning streams are the most well known and well studied. However, recent studies have shown that migration occurs in a range of freshwater fish taxa from many different habitats. In this review we focus on the causes and consequences of migration in freshwater fishes. We start with an introduction of concepts and categories of migration, and then address the evolutionary causes that drive individuals to make these migratory journeys. The basis for the decision of an individual fish to migrate or stay resident is an evaluation of the costs and benefits of different strategies to maximize its lifetime reproductive effort. We provide examples by discussing our own work on the causes behind seasonal migration in a cyprinid fish, roach (Rutilus rutilus (L., 1758)), within this framework. We then highlight different adaptations that allow fish to migrate over sometimes vast journeys across space, including capacity for orientation, osmoregulation, and efficient energy expenditure. Following this we consider the consequences of migration in freshwater fish from ecological, evolutionary, and conservation perspectives, and finally, we detail some of the recent developments in the methodologies used to collect data on fish migration and how these could be used in future research.Key words: fish migration, seasonal, evolution, consequences, cyprinids.Résumé : L'étonnant phénomène des migrations animales fascine les humains depuis belle lurette. De remarquables migrations caractérisent de nombreux poissons d'eau douce, les migrations massives des salmonidés à partir de leur cours d'eau d'origine étant les plus connues et les plus étudiées. Cela dit, des études récentes ont démontré l'existence de migrations chez divers taxons de poissons dulcicoles d'habitats nombreux et variés. Dans la présente synthèse, nous nous penchons sur les causes et conséquences de la migration chez les poissons dulcicoles. Nous abordons en premier lieu les concepts importants et les catégories de migration, puis examinons les causes évolutionnaires qui amènent des individus à accomplir ces déplacements migratoires. La décision d'un poisson donné de migrer ou de demeurer en place repose sur une évaluation des coûts et avantages de différentes stratégies visant à optimiser son effort de reproduction durant sa durée de vie. Nous présentons des exemples basés sur nos propres travaux sur les causes de la migration saisonnière chez un poisson cyprinidé, le gardon (Rutilus rutilus (L., 1758)), dans ce cadre. Nous décrivons ensuite différentes adaptations qui permettent dans certains cas à des poissons de migrer sur de grandes distances, dont une capacité d'orientation, l'osmorégulation et l'efficience des dépenses énergétiques. Nous examinons ensuite les conséquences de la migration chez les poissons dulcicoles des points de vue écologique, évolutio...

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“…Within a fish's lifetime, local environments often become marginal or inadequate for its needs, prompting movement to increase or maintain fitness (Thorpe 1994, Brannon andothers 2004;see Box 2). A general model of life history developed for fishes (Harden Jones 1968), and refined for stream fishes (Schlosser and Angermeier 1995) and salmonids (Northcote 1997), holds that 1) movements link together habitats required for spawning, growth, and refuge from harsh conditions, and 2) these habitats are often dispersed throughout the riverscape (Schlosser 1991, Fausch andothers 2002).…”

Section: Section_ii:_movement_and_salmonid_ Life_histories___________mentioning

confidence: 99%

Strategies for conserving native salmonid populations at risk from nonnative fish invasions: tradeoffs in using barriers to upstream movement

Fausch¹,

Rieman²,

Young³

et al. 2006

109

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You may order additional copies of this publication by sending your mailing information in label form through one of the following media. Please specify the publication title and number. Abstract_ _________________________________________Native salmonid populations in the inland West are often restricted to small isolated habitats at risk from invasion by nonnative salmonids. However, further isolating these populations using barriers to prevent invasions can increase their extinction risk. This monograph reviews the state of knowledge about this tradeoff between invasion and isolation. We present a conceptual framework to guide analysis, focusing on four main questions concerning conservation value, vulnerability to invasion, persistence given isolation, and priorities when conserving multiple populations. Two examples illustrate use of the framework, and a final section discusses opportunities for making strategic decisions when faced with the invasion-isolation tradeoff. Keywords Executive_SummaryNative salmonid populations have declined throughout the world due to a host of human influences, including habitat degradation and loss, invasion of nonnative fishes, and overfishing. In many regions, suitable coldwater habitats for salmonids are found mainly in protected natural areas, so that these fishes are increasingly relegated to smaller and more isolated pieces of their former native ranges. Moreover, populations of native trout and charr in these relatively undisturbed habitats are often at further risk from invasion by nonnative salmonids from downstream. Faced with this dilemma, fisheries managers frequently consider using barriers to upstream movement to prevent invasion and displacement or hybridization. However, in doing so they face a tradeoff because isolating native salmonid populations in small headwater habitats may also increase their risk of extinction. Here we focus on native salmonids in the inland western U.S. (for example, cutthroat trout, Oncorhynchus clarkii; bull trout, Salvelinus confluentus), but this is an important problem for salmonids and other stream biota worldwide.This monograph reviews the state of knowledge about the factors that affect this tradeoff between invasion and isolation, and presents a framework for analyzing it and prioritizing conservation actions. Barriers to prevent invasions can pose problems for salmonids because these fish often need to move to complete their life history. Although anadromous salmonids are known for their extensive migrations, freshwater trout, charr, grayling, and whitefish also show remarkable flexibility in life history and diverse movement behaviors. Movements allow fish living in patchy environments to maximize fitness by placing each life history stage in habitats that provide optimum growth and survival. Likewise, in environments that fluctuate seasonally or among years, diverse life histories, and movements allow fish to avoid harsh conditions, or recolonize habitats after catastrophes.Isolation of fish populations using barriers can...

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Potamodromy in SahnonidaeLiving and Moving in the Fast Lane

Cited by 165 publications

References 0 publications

Seasonal age distributions and maturity stage in a naturalized rainbow trout (Oncorhynchus mykissWalbaum) population in southern Chile reveal an ad-fluvial life history

Seasonal age distributions and maturity stage in a naturalized rainbow trout (Oncorhynchus mykissWalbaum) population in southern Chile reveal an ad-fluvial life history

There and back again: migration in freshwater fishes

Strategies for conserving native salmonid populations at risk from nonnative fish invasions: tradeoffs in using barriers to upstream movement

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