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Climate-driven population dynamics of a North American freshwater fish, Ictalurus furcatus: inference from the mitochondrial control region sequence data
- Padhi, Abinash
- Ecology of freshwater fish 2011 v.20 no.2 pp. 263-269
- Ictalurus furcatus, air temperature, cold, freshwater fish, ice, migratory behavior, population dynamics, population size, North America
- - Using the Bayesian coalescent methodology and mitochondrial control region sequence data, the present study reconstructs the dynamics of effective population size of a temperature-driven seasonal migratory North American freshwater fish, Ictalurus furcatus, during the last glacial cycle. The trend in effective population size is directly associated with the trend in surface air temperature; it is inversely associated with the accumulation of ice sheets in North America during the contemporary period. The long-term decrease in effective population size during the cold period followed by rebound during the warmer period could be explained by this species' preference for relatively warmer temperatures for its optimal growth and survival.