Data from: Life in the unthinking depths: energetic constraints on encephalization in marine fishes

Teresa L. Iglesias, Alex Dornburg, Matthew C. Brandley, Michael E. Alfaro & Dan L. Warren
Several hypotheses have been proposed to explain the limitation of brain size in vertebrates. Here we test three hypotheses of brain size evolution using marine teleost fishes: the direct metabolic constraints hypothesis, the expensive tissue hypothesis, and the temperature-dependent hypothesis. Our analyses indicate that there is a robust positive correlation between encephalization and basal metabolic rate that spans the full range of depths occupied by teleosts from the epipelagic (< 200m), mesopelagic (200-1000m), and bathypelagic...
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