Distribution of Juvenile Coho Salmon in Relation to Water Temperatures in Tributaries of the Mattole River, California

Welsh, Hartwell H.; Hodgson, Garth R.; Harvey, Bret C.; Roche, Maureen F.

doi:10.1577/1548-8675(2001)021<0464:dojcsi>2.0.co;2

Cited by 67 publications

(82 citation statements)

References 21 publications

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“…A similar match exists for coho salmon (T p opt ; T opt window p 15. 4Њ-18.4ЊC;Casselman et al 2012) 17ЊC because maximum growth occurs at ∼15ЊC (Edsall et al 1999), the preferred temperature is ∼15ЊC, and its abundance in streams decreases when maximum daily temperatures exceeds 18ЊC (Welsh et al 2001). These comparisons suggest that the T opt for aerobic scope (a phenotype at the whole-organism level) has effects on processes operating at the population level.…”

Section: Discussionmentioning

confidence: 97%

Optimum Temperature in Juvenile Salmonids: Connecting Subcellular Indicators to Tissue Function and Whole-Organism Thermal Optimum

Anttila¹,

Casselman²,

Schulte³

et al. 2013

Physiological and Biochemical Zoology

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Temperature affects processes at all levels of biological organization, but it is unclear whether processes at different levels have similar thermal optima (T(opt)). Here, we compare the T(opt) for aerobic scope, a whole-organism measure of performance, with both the Arrhenius breakpoint temperature for maximum heart rate (HR-ABT), a measure of tissue level performance, and the temperature at which AMP-activated protein kinase (AMPK) is phosphorylated in the heart, an indicator of an increase in dependence on anaerobic energy metabolism at the cellular level in juvenile rainbow trout Oncorhynchus mykiss. The T(opt) for aerobic scope was 19°C, with aerobic scope being maintained at ≥90% of maximum (termed a "T(opt) window") from 16.5° to 20.5°C. HR-ABT occurred at [Formula: see text], while the profile of AMPK phosphorylation started to change from baseline at 19°C, suggesting that these processes have similar thermal sensitivities as a fish is warmed to T(opt). The effects of temperature on AMPK phosphorylation were also measured in coho salmon Oncorhynchus kisutch hearts and compared with previously published values for HR-ABT and aerobic scope T(opt). AMPK phosphorylation in coho hearts began to change at temperatures above 17°C, which again is comparable with the published T(opt) for aerobic scope (17°C) and HR-ABT ([Formula: see text]) in these individuals. Thus, the thermal sensitivity of these subcellular, tissue, and whole-organism functions are highly correlated in both rainbow trout and coho salmon and may depend on each other.

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Section: Discussionmentioning

confidence: 97%

Optimum Temperature in Juvenile Salmonids: Connecting Subcellular Indicators to Tissue Function and Whole-Organism Thermal Optimum

Anttila¹,

Casselman²,

Schulte³

et al. 2013

Physiological and Biochemical Zoology

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“…In the winter when low temperatures cause juvenile salmonids to become more sluggish (increased response time and decreased swimming speed), even slightly colder temperatures may increase vulnerability to predation by birds and mammals (Metcalfe et al 1999). During the summer, warmer temperatures result in higher fish metabolic rates and a corresponding increase in food requirements (Welsh et al 2001).…”

Section: Discussionmentioning

confidence: 99%

Juvenile salmonid (Oncorhynchus spp.) use of constructed and natural side channels in Pacific Northwest rivers

Morley¹,

Garcia²,

Bennett³

et al. 2005

Can. J. Fish. Aquat. Sci.

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Off-channel habitats, critical components in the life histories of Pacific salmonids (Oncorhynchus spp.), have become increasingly rare in human-modified floodplains. The construction of groundwater-fed side channels is one approach that has been used in the Pacific Northwest to recreate off-channel habitats. We evaluated the effectiveness of this technique by comparing 11 constructed side channels with paired reference sites (naturally occurring channels fed by mixed groundwater and surface water) in western Washington. While total salmonid densities were not significantly different between channel types, coho salmon (Oncorhynchus kisutch) densities were higher in constructed channels and trout densities were higher in reference channels during the winter. Constructed channels were deeper than reference channels and warmer in the winter and cooler in the summer but had lower physical habitat diversity, wood density, and canopy coverage. We did not detect significant differences in water chemistry or invertebrate parameters between channel types. Summer coho density was inversely correlated with minimum daily temperature and with total nitrogen and total phosphorous concentrations. Relative to other stream habitats, both constructed and reference channels supported high densities of juvenile coho salmon during the summer and winter.Résumé : Les habitats hors du chenal, des composantes essentielles du cycle biologique des salmonidés du Pacifique (Oncorhynchus spp.), deviennent de plus en plus rares dans les plaines de débordement modifiées par l'activité humaine. La construction de chenaux latéraux alimentés par la nappe phréatique est l'une des méthodes utilisées dans la région pacifique du nord-ouest pour récréer les habitats hors du chenal. Nous évaluons l'efficacité de cette technique en comparant 11 chenaux latéraux artificiels à des sites appariés (des chenaux d'origine naturelle alimentés par un mé-lange d'eau phréatique et d'eau de surface) dans l'ouest du Washington. Bien que les densités totales de salmonidés ne soient pas significativement différentes dans les deux types de chenaux, les densités de saumons coho (Oncorhynchus kisutch) sont plus élevées dans les chenaux artificiels et les densités de truites plus grandes dans les chenaux témoins en hiver. Les chenaux artificiels sont plus profonds que les chenaux témoins, ils sont plus chauds en hiver et plus frais en été, mais ils possèdent une diversité d'habitat physique, une densité de bois et une couverture d'arbres plus faibles.

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“…The comparison includes articles on rainbow trout (non-anadromous O. mykiss) because much of the literature is dedicated to rainbow trout, and the preference and tolerance of steelhead and rainbow trout generally appear similar. The highest average of the maximum daily temperature over any 7-day period and the highest average of the mean daily temperature over any 7-day period were also computed (Eaton et al 1995;Welsh et al 2001). Because the literature identifies 24°C as a heat-tolerance limit (Table 1; Eaton et al 1995), the number of days and duration (h day -1 ) that stream temperatures equaled or exceeded this criterion were calculated from the record of temperatures.…”

Section: Methodsmentioning

confidence: 99%

Thermal ecology of juvenile steelhead in a warm-water environment

Spina

2006

Environ Biol Fish

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How salmonids adjust to the cost of chronic exposure to warm water in nature, particularly in habitats where areas of cold water are unavailable, is largely unknown. In the hot dry climate of southern California, oversummering juvenile steelhead, Oncorhynchus mykiss, can experience a continual warm-water environment. Studies were performed in three streams (34°N) during the summers of 2002-2004 to assess how steelhead (10-28 cm total length) exploit the thermal environment and to develop an understanding of how existing preference and heat tolerance information reported for the species relate to the actual temperatures the local population experiences. Analyses of achievable body temperatures, an index of observed body temperatures, and behavioral time budgets, indicate steelhead did not behaviorally thermoregulate. Findings from associated field surveys suggest areas of cold water were not available. Steelhead held focal points at temperatures (17.4-24.8°C) that were at times higher than the temperature preferences and heat tolerances reported for the species. Oversummering juvenile steelhead accept an elevated body temperature and remain active and forage throughout the day, apparently as a means for coping with warm water at the southern extent of their range. The relatively high body temperatures that steelhead accept appear to represent a compromise in exchange for maintaining an expanded geographic (latitudinal) range.

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Distribution of Juvenile Coho Salmon in Relation to Water Temperatures in Tributaries of the Mattole River, California

Cited by 67 publications

References 21 publications

Optimum Temperature in Juvenile Salmonids: Connecting Subcellular Indicators to Tissue Function and Whole-Organism Thermal Optimum

Optimum Temperature in Juvenile Salmonids: Connecting Subcellular Indicators to Tissue Function and Whole-Organism Thermal Optimum

Juvenile salmonid (Oncorhynchus spp.) use of constructed and natural side channels in Pacific Northwest rivers

Thermal ecology of juvenile steelhead in a warm-water environment

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