Is spatial variation in population size structures of a stream-dwelling caddisfly due to the altered effects of a predator by a third-party species?

Predators alter abundances and life history characteristics of prey, and effects of predator–prey interactions can be altered by third-party species. Here, we examine size structures of the caddisfly, Phylloicus hansoni , in Trinidadian streams with two distinct fish assemblages: upstream reaches wh...

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