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Crayfishes compete for optimal water temperatures

The survival of many animals depends on their ability to compete for resources—food, water, shelter, or territory. But could optimal temperatures be an equally valuable resource for cold-blooded species—and a reason for territorial disputes? Canadian scientists led by Glenn J. Tattersall have observed this type of competition in the Louisiana Crayfish, Procambarus clarkii. When it comes to securing a territory with the right temperature, this crayfish shows behaviors similar to those seen in traditional intraspecific rivalries.

The behavior of the Louisiana Crayfish was recorded with video cameras and analyzed later. The experimental containers (so-called shuttle boxes) were divided in two.

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