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For years, scientific literature, as well as fisheries management and conservation efforts, have assumed that the survival of adult fish is relatively constant through time, and that most fluctuations in the numbers of adults come from variation in the number of young fish that are produced and survive to maturity.
However, new research reveals that fluctuating food supplies and competition can alter the survival of adult fish -- at least for a Pacific marine reef species -- and be a major cause of changes in their populations.Image credit: Clint Nelson
