scholarly journals Brown trout thermal niche and climate change: expected changes in the distribution of cold‐water fish in central Spain

Ecohydrology ◽  
2015 ◽  
Vol 9 (3) ◽  
pp. 514-528 ◽  
Author(s):  
José M. Santiago ◽  
Diego García de Jalón ◽  
Carlos Alonso ◽  
Joaquín Solana ◽  
Jaime Ribalaygua ◽  
...  
Keyword(s):  
Climate Change ◽  
Brown Trout ◽  
Cold Water ◽  
Central Spain ◽  
Thermal Niche ◽  
Water Fish

scholarly journals Waning habitats due to climate change: the effects of changes in streamflow and temperature at the rear edge of the distribution of a cold-water fish

2017 ◽  
Vol 21 (8) ◽  
pp. 4073-4101 ◽  
Author(s):  
José María Santiago ◽  
Rafael Muñoz-Mas ◽  
Joaquín Solana-Gutiérrez ◽  
Diego García de Jalón ◽  
Carlos Alonso ◽  
...  
Keyword(s):  
Climate Change ◽  
Brown Trout ◽  
Cold Water ◽  
Local Level ◽  
Stream Temperature ◽  
Risk Level ◽  
Model Parameters ◽  
Linear Regression Method ◽  
Rear Edge ◽  
Water Fish

Abstract. Climate changes affect aquatic ecosystems by altering temperatures and precipitation patterns, and the rear edges of the distributions of cold-water species are especially sensitive to these effects. The main goal of this study was to predict in detail how changes in air temperature and precipitation will affect streamflow, the thermal habitat of a cold-water fish (the brown trout, Salmo trutta), and the synergistic relationships among these variables at the rear edge of the natural distribution of brown trout. Thirty-one sites in 14 mountain rivers and streams were studied in central Spain. Models of streamflow were built for several of these sites using M5 model trees, and a non-linear regression method was used to estimate stream temperatures. Nine global climate models simulations for Representative Concentration Pathways RCP4.5 and RCP8.5 scenarios were downscaled to the local level. Significant reductions in streamflow were predicted to occur in all of the basins (max. −49 %) by the year 2099, and seasonal differences were noted between the basins. The stream temperature models showed relationships between the model parameters, geology and hydrologic responses. Temperature was sensitive to streamflow in one set of streams, and summer reductions in streamflow contributed to additional stream temperature increases (max. 3.6 °C), although the sites that are most dependent on deep aquifers will likely resist warming to a greater degree. The predicted increases in water temperatures were as high as 4.0 °C. Temperature and streamflow changes will cause a shift in the rear edge of the distribution of this species. However, geology will affect the extent of this shift. Approaches like the one used herein have proven to be useful in planning the prevention and mitigation of the negative effects of climate change by differentiating areas based on the risk level and viability of fish populations.

Effects of Climate Change on Cold-Water Fish in the Northern Rockies

2017 ◽  
pp. 37-58 ◽  
Author(s):  
Michael K. Young ◽  
Daniel J. Isaak ◽  
Scott Spaulding ◽  
Cameron A. Thomas ◽  
Scott A. Barndt ◽  
...  
Keyword(s):  
Climate Change ◽  
Cold Water ◽  
Water Fish ◽  
Northern Rockies

scholarly journals Waning habitats due to climate change: effects of streamflow and temperature changes at the rear edge of the distribution of a cold-water fish

2017 ◽  
Author(s):  
José M. Santiago ◽  
Rafael Muñoz-Mas ◽  
Joaquín Solana ◽  
Diego García de Jalón ◽  
Carlos Alonso ◽  
...  
Keyword(s):  
Climate Change ◽  
Cold Water ◽  
Local Level ◽  
Stream Temperature ◽  
Global Climate Models ◽  
Risk Level ◽  
Linear Regression Method ◽  
Rear Edge ◽  
Temperature And Precipitation ◽  
Water Fish

Abstract. Climate change affects aquatic ecosystems altering temperature and precipitation patterns, and the rear edge of the distribution of cold-water species is especially sensitive to them. The main goal was to predict in detail how change in air temperature and precipitation will affect streamflow, the thermal habitat of a cold-water fish (brown trout, Salmo trutta Linnaeus 1758), and their synergistic relationships at the rear edge of its natural distribution. 31 sites in 14 mountain rivers and streams were studied in Central Spain. Models at several sites were built using regression trees for streamflow, and a non-linear regression method for stream temperature. Nine global climate models simulations for the RCP4.5 and RCP8.5 (Representative Concentration Pathways) scenarios were downscaled to a local level. Significant streamflow reductions were predicted in all basins (max. −49 %) by the year 2099, showing seasonal differences between them. The stream temperature models showed relationships between models parameters, geology and hydrologic responses. Temperature was sensitive to the streamflow in one set of streams, and summer reductions contributed to additional stream temperature increases (max. 3.6 °C), although the most deep-aquifer dependent sites better resisted warming. The predicted increase in water temperature reached up to 4.0 °C. Temperature and streamflow changes will cause a shift of the rear edge of the species distribution. However, geology conditioned the extent of this shift. Approaches like these should be useful in planning the prevention and mitigation of negative effects of climate change by differentiating areas based on the risk level and viability of fish populations.

Use of a Cold-Water Refuge by Rainbow and Brown Trout in a Geothermally Heated Stream

1977 ◽  
Vol 39 (1) ◽  
pp. 37-39 ◽  
Author(s):  
Calvin M. Kaya ◽  
Lynn R. Kaeding ◽  
Dalton E. Burkhalter
Keyword(s):  
Brown Trout ◽  
Cold Water

scholarly journals Microencapsulation of oil droplets using cold water fish gelatine/gum arabic complex coacervation by membrane emulsification

2013 ◽  
Vol 53 (1) ◽  
pp. 362-372 ◽  
Author(s):  
Emma Piacentini ◽  
Lidietta Giorno ◽  
Marijana M. Dragosavac ◽  
Goran T. Vladisavljević ◽  
Richard G. Holdich
Keyword(s):  
Cold Water ◽  
Gum Arabic ◽  
Complex Coacervation ◽  
Oil Droplets ◽  
Membrane Emulsification ◽  
Water Fish

scholarly journals Untangling mechanisms of crude oil toxicity: Linking gene expression, morphology and PAHs at two developmental stages in a cold-water fish

2021 ◽  
Vol 757 ◽  
pp. 143896
Author(s):  
Elin Sørhus ◽  
Carey E. Donald ◽  
Denis da Silva ◽  
Anders Thorsen ◽  
Ørjan Karlsen ◽  
...  
Keyword(s):  
Gene Expression ◽  
Crude Oil ◽  
Developmental Stages ◽  
Cold Water ◽  
Water Fish ◽  
Oil Toxicity

Metabolic performance and thermal preference of Westslope Cutthroat Trout Oncorhynchus clarkii lewisi and non-native trout across an ecologically relevant range of temperatures

2021 ◽  
Author(s):  
Camille J. Macnaughton ◽  
Travis C. Durhack ◽  
Neil J. Mochnacz ◽  
Eva C. Enders
Keyword(s):  
Brook Trout ◽  
Cold Water ◽  
Cutthroat Trout ◽  
Intermittent Flow ◽  
Performance Curve ◽  
Westslope Cutthroat Trout ◽  
Oncorhynchus Clarkii ◽  
Thermal Niche ◽  
Preferred Temperatures ◽  
Metabolic Performance

The physiology and behaviour of fish are strongly affected by ambient water temperature. Physiological traits related to metabolism, such as aerobic scope (AS), can be measured across temperature gradients and the resulting performance curve reflects the thermal niche that fish can occupy. We measured AS of Westslope Cutthroat Trout (Oncorhynchus clarkii lewisi) at 5, 10, 15, 20, and 22°C and compared temperature preference (Tpref) of the species to non-native Brook Trout, Brown Trout, and Rainbow Trout. Intermittent-flow respirometry experiments demonstrated that metabolic performance of Westslope Cutthroat Trout was optimal at ~15 °C and decreased substantially beyond this temperature, until lethal temperatures at ~25 °C. Adjusted preferred temperatures across species (Tpref) were comparatively high, ranging from 17.8-19.9 °C, with the highest Tpref observed for Westslope Cutthroat Trout. Results suggest that although Westslope Cutthroat Trout is considered a cold-water species, they do not prefer or perform as well in cold water (≤ 10°C), thus, can occupy a warmer thermal niche than previously thought. The metabolic performance curve (AS) can be used to develop species‐specific thermal criteria to delineate important thermal habitats and guide conservation and recovery actions for Westslope Cutthroat Trout.

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