The cost of living for freshwater fish in a warmer, more polluted world[Review]

摘要

Little of the vast literature on the temperature physiology of freshwater fish is useful in predicting the effects of global warming. In the present review a series of laboratory experiments is reviewed in which rainbow trout (Oncouhynchus mykiss) were exposed to simulated global warming, a 2 degreesC increment superimposed upon the natural thermal regime, in the presence and absence of two common freshwater pollutants, ammonia and acidity (low pH). Simulated global warming had little effect on the growth and physiology of trout fed to satiation over much of the summer. However, in late summer, when ambient water temperature was at its highest, the addition of 2 degreesC caused a marked inhibition of appetite and growth, although this impact was not exacerbated by a reduction in food availability. In winter, +2 degreesC stimulated metabolism, appetite and growth by approximately 30-60%.