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Examination of the Feeding Behavior of Larval Tropisternus (Coleoptera: Hydrophilidae)

Gordon R. Plague
Journal of the Kansas Entomological Society
Vol. 69, No. 1 (Jan., 1996), pp. 104-107
Stable URL: http://www.jstor.org/stable/25085655
Page Count: 4
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Examination of the Feeding Behavior of Larval Tropisternus (Coleoptera: Hydrophilidae)
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Abstract

Numerous aquatic larval hydrophilid species consume their prey with their heads above the water surface. To determine whether Tropisternus sp. exhibit the same behavior, larvae were observed under three conditions: (1) individually with an emergent twig present, (2) in a group with an emergent twig present, and (3) in a group without a twig. All beetles that ate crawled onto the twig and emerged their heads from the water to feed. Several behaviors were observed that do not support some of the hypotheses concerning the adaptive significance of this feeding behavior.

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