Thermal Acclimation of Metabolism of the Yellow Bullhead, Ictalurus                natalis (Le Sueur)

Morris, Robert W.

doi:10.1086/physzool.38.3.30152834

Cited by 11 publications

(1 citation statement)

References 8 publications

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“…This suggests that acclimation may be an important process whereby tropical reef fish can cope with increased average summer temperatures in the future without a loss of performance at winter temperatures. The reduction in RMR of $ 70 mg O 2 kg À1 h À1 in acclimated fish represented a Q 10 (the rate of change depending on temperature) reduction of 1.31, which is similar to that observed when acclimation in polar fishes occurs (Q 10 change: 0.62-1.29; Franklin et al, 2007;Robinson & Davison, 2008), but is less than that recorded for temperate species (Q 10 change: 1.55-3.97; Morris, 1965;Walsh et al, 1983;Sébert et al, 1995). This demonstrates that acclimation potential of some tropical fishes may not be as large as species that experience greater seasonal variation in maximum and minimum temperatures.…”

Section: Discussionsupporting

confidence: 58%

Acclimation to predicted ocean warming through developmental plasticity in a tropical reef fish

Donelson

McCormick

Nilsson

2010

Global Change Biology

167

168

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Determining the capacity of organisms to acclimate and adapt to increased temperatures is key to understand how populations and communities will respond to global warming. Although there is evidence that elevated water temperature affects metabolism, growth and condition of tropical marine fish, it is unknown whether they have the potential to acclimate, given adequate time. We reared the tropical reef fish Acanthochromis polyacanthus through its entire life cycle at present day and elevated ( 1 1.5 and 1 3.0 1C) water temperatures to test its ability to thermally acclimate to ocean temperatures predicted to occur over the next 50-100 years. Fish reared at 3.0 1C greater than the present day average reduced their resting oxygen consumption (RMR) during summer compared with fish reared at present day temperatures and tested at the elevated temperature. The reduction in RMR of up to 69 mg O 2 kg À1 h À1 in acclimated fish could represent a significant benefit to daily energy expenditure. In contrast, there was no acclimation to summer temperatures exhibited by fish reared at 1.5 1C above present day temperatures. Fish acclimated to 1 3.0 1C were smaller and in poorer condition than fish reared at present day temperatures, suggesting that even with acclimation there will be significant consequences for future populations of tropical fishes caused by global warming.

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Section: Discussionsupporting

confidence: 58%

Acclimation to predicted ocean warming through developmental plasticity in a tropical reef fish

Donelson

McCormick

Nilsson

2010

Global Change Biology

167

168

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Temperature requirements of fishes from eastern Lake Erie and the upper Niagara River: a review of the literature

et al. 1979

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SynopsisLiterature on the temperature requirements of fishes expected to occur in eastern Lake Erie and the upper Niagara River is reviewed. Seventy-four species of fishes are reported from Lake Erie and sixty-one from the upper Niagara River. Incipient upper lethal temperatures range from 23" C for Salmo trutta to 41' C for Carassius auratus and Ictalurus nebulosus. Preferred temperatures ranged from 10' C for Coregonus clupeaforrnis to 31.1' C for Lepomis macrochirus.Spawning temperatures range from < 3.8" C for C. artedii to 15.6-27.7" C for Alosa pseudoharengus. Data is discussed in terms of the effects of thermal effluents on individuals of a species, structure of aquatic communities and impact on ecosystems. Synergistic effects of temperature and toxicants and disruption of sprawning are potentially the most damaging direct effects of thermal effluents.Heated water may be contributing to the present rate of eutrophication in the lake and river. Increased input of thermal effluents into the eastern basin of Lake Erie will maintain a stress on the fishery and may irreversibly damage it.

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Cold-acclimation-induced protein hypertrophy in channel catfish and green sunfish

1988

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1. Following acclimation of channel catfish to a reduction in temperature from 25 degrees to 15 degrees C, there were approximately two-fold increases in liver mass, cell size, total protein, and total enzyme activity, relative to activity per milligram of protein and per gram wet weight of tissue, indicating tissue hypertrophy. There was no change in either total liver DNA content or protein concentration per gram weight. 2. Green sunfish, unlike catfish, showed virtually no change in liver mass following cold acclimation. However, sunfish showed a net increase in total liver protein content and an increase in protein concentration. The increase in protein content was balanced by a reciprocal and equivalent decrease in glycogen content. Consequently, liver mass was maintained. 3. During cold acclimation both catfish and sunfish showed an increase in ventricular heart mass and protein content, but no change in protein concentration. 4. The activities of several enzymes were measured in liver from 15 degrees C and 25 degrees C steady-state-acclimated catfish and at intervals following transfer from 15 degrees to 25 degrees C and from 25 degrees to 15 degrees C. Total tissue enzyme activity showed positive compensation which correlated with the change in liver mass and protein content. Specific activities based on protein and on wet weight showed dissimilar acclimatory patterns. Two enzymes - cytochrome oxidase and lactate dehydrogenase - showed inverse compensation in specific activity but positive compensation in total activity. Citrate synthase, glucose-6-phosphate-dehydrogenase and 6-phosphogluconate dehydrogenase showed positive compensation in both specific and total activities. 5. The increase in tissue protein content or 'protein hypertrophy' occurred with cell hypertrophy in cold-acclimated catfish, while protein hypertrophy occurred as an increased protein concentration without cell hypertrophy in sunfish. This phenomenon is considered adaptive in that it permits a compensatory increase in the total enzymatic capacity of a tissue. The two-fold increases in total enzyme activities, superimposed on either an increase or decrease in specific activity, suggest that two biochemical mechanisms may be operative during cold-induced liver hypertrophy, one effecting a specific step in protein translation at a point common to the synthesis of all proteins and a second targetted pretranslationally, i.e., transcriptional regulation.

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Thermal Acclimation of Metabolism of the Yellow Bullhead, Ictalurus natalis (Le Sueur)

Cited by 11 publications

References 8 publications

Acclimation to predicted ocean warming through developmental plasticity in a tropical reef fish

Acclimation to predicted ocean warming through developmental plasticity in a tropical reef fish

Temperature requirements of fishes from eastern Lake Erie and the upper Niagara River: a review of the literature

Cold-acclimation-induced protein hypertrophy in channel catfish and green sunfish

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