Thermal preference of Arctic charr, Salvelinus alpinus, and brown trout, Salmo trutta – implications for their niche segregation

Larsson, Sylvia H.

doi:10.1007/s10641-004-5353-4

Cited by 104 publications

(100 citation statements)

References 29 publications

(49 reference statements)

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“…Our results therefore contradict the strong correlation between maximum feeding rates and final thermal preference observed in many species of fish (McCauley and Casselman 1980;Jobling 1981;Larsson 2005). In addition, zooplankton biomass is greater in the upper metalimnion and epilimnion than at the lower temperatures preferred by mysids (Boscarino unpubl.…”

Section: Modified Modelcontrasting

confidence: 95%

The effects of temperature and predator—prey interactions on the migration behavior and vertical distribution of Mysis relicta

Boscarino

Rudstam

Mata

et al. 2007

Limnology & Oceanography

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The extent to which temperature, temperature gradients, predator smell, and prey availability influence the migratory behaviors and vertical distribution of the opossum shrimp, Mysis relicta, was explored through controlled laboratory experiments and comparisons with field distributions of mysids in Lake Ontario. By varying environmental conditions in 2-m tall experimental columns in a temperature-controlled room, we determined that mysids prefer temperatures between 6uC and 8uC with limited movement into waters of 12uC or higher. No mysids moved into waters above 16uC in the absence of prey. However, a higher proportion of mysids moved into temperatures of 14uC and 16uC (but not 18uC) when densities of Daphnia pulicaria exceeding 120 L 21 were present at those temperatures. Mysis avoided waters with kairomones from a primary mysid predator, the alewife (Alosa pseudoharengus). The rate of temperature change with depth did not restrict mysid movements. A temperature preference function based on the experimental data was applied to an existing model of mysid vertical distribution. The modified model predicted the depth of maximum mysid density to within 1 m and yielded high percentage overlap index values when compared with published mysid vertical distributions in Lake Ontario. Our approach may be used to model how diurnal, seasonal, and larger climactic changes can impact both the vertical position and feeding ecology of mysids, a keystone species in many deep-water pelagic food webs.

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Section: Modified Modelcontrasting

confidence: 95%

The effects of temperature and predator—prey interactions on the migration behavior and vertical distribution of Mysis relicta

Boscarino

Rudstam

Mata

et al. 2007

Limnology & Oceanography

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“…However, in the current study, hypoxia and temperature tolerance differences between char and salmon could possibly be related to the preferred environmental conditions of the species, similar to the findings of Eliason et al (2011) with Pacific salmon populations. Char prefer cold temperatures (Larsson, 2005), which during summer are found at the bottom of big lakes, which may be hypoxic (e.g. Hawley et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

Warm acclimation and oxygen depletion induce species-specific responses in salmonids

Anttila

Lewis

Prokkola

et al. 2015

Journal of Experimental Biology

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Anthropogenic activities are greatly altering the habitats of animals, whereby fish are already encountering several stressors simultaneously. The purpose of the current study was to investigate the capacity of fish to respond to two different environmental stressors (high temperature and overnight hypoxia) separately and together. We found that acclimation to increased temperature (from 7.7±0.02°C to 14.9±0.05°C) and overnight hypoxia (daily changes from normoxia to 63-67% oxygen saturation), simulating climate change and eutrophication, had both antagonistic and synergistic effects on the capacity of fish to tolerate these stressors. The thermal tolerance of Arctic char (Salvelinus alpinus) and landlocked salmon (Salmo salar m. sebago) increased with warm acclimation by 1.3 and 2.2°C, respectively, but decreased when warm temperature was combined with overnight hypoxia (by 0.2 and 0.4°C, respectively). In contrast, the combination of the stressors more than doubled hypoxia tolerance in salmon and also increased hypoxia tolerance in char by 22%. Salmon had 1.2°C higher thermal tolerance than char, but char tolerated much lower oxygen levels than salmon at a given temperature. The changes in hypoxia tolerance were connected to the responses of the oxygen supply and delivery system. The relative ventricle mass was higher in cold-than in warm-acclimated salmon but the thickness of the compact layer of the ventricle increased with the combination of warm and hypoxia acclimation in both species. Char had also significantly larger hearts and thicker compact layers than salmon. The results illustrate that while fish can have protective responses when encountering a single environmental stressor, the combination of stressors can have unexpected species-specific effects that will influence their survival capacity.

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“…Fritz and Garside, 1974;Deacon and Hecht, 1995;Cardona, 2000;Serrano et al, 2010). Interpretation of these studies has focused on correlating choices with optimal growth (Jobling, 1981) or food conversion (Larsson, 2005). Indeed, common snook (Centropomus undecimalis) maintained at apparent optimal salinities invested more energy in processing food than fish maintained at suboptimal salinities (Gracia-Lopez et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Diet influences salinity preference of an estuarine fish, the killifishFundulus heteroclitus

Bucking

Wood

Grosell

2012

Journal of Experimental Biology

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SUMMARYUnderstanding the interplay among the external environment, physiology and adaptive behaviour is crucial for understanding how animals survive in their natural environments. The external environment can have wide ranging effects on the physiology of animals, while behaviour determines which environments are encountered. Here, we identified changes in the behavioural selection of external salinity in Fundulus heteroclitus, an estuarine teleost, as a consequence of digesting a meal. Fish that consumed high levels of dietary calcium exhibited a higher preferred salinity compared with unfed fish, an effect that was exaggerated by elevated dietary sodium chloride. The mean swimming speed (calculated as a proxy of activity level) was not affected by consuming a diet of any type. Constraining fish to water of 22p.p.t. salinity during the digestion of a meal did not alter the amount of calcium that was absorbed across the intestine. However, when denied the capacity to increase their surrounding salinity, the compromised ability to excrete calcium to the water resulted in significantly elevated plasma calcium levels, a potentially hazardous physiological consequence. This study is the first to show that fish behaviourally exploit their surroundings to enhance their ionoregulation during digestion, and to pinpoint the novel role of dietary calcium and sodium in shaping this behaviour. We conclude that in order to resolve physiological disturbances in ion balance created by digestion, fish actively sense and select the environment they inhabit. Ultimately, this may result in transient diet-dependent alteration of the ecological niches occupied by fishes, with broad implications for both physiology and ecology.

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Thermal preference of Arctic charr, Salvelinus alpinus, and brown trout, Salmo trutta – implications for their niche segregation

Cited by 104 publications

References 29 publications

The effects of temperature and predator—prey interactions on the migration behavior and vertical distribution of Mysis relicta

The effects of temperature and predator—prey interactions on the migration behavior and vertical distribution of Mysis relicta

Warm acclimation and oxygen depletion induce species-specific responses in salmonids

Diet influences salinity preference of an estuarine fish, the killifishFundulus heteroclitus

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