Reciprocal regulation of fat content and flight activity in male tsetse flies (Glossina palpalis)
1995
Loke, H. | Randolph, S.E.
To disentangle cause and effect in previously observed relationships between fat content and flight activity in male tsetse (Glossina spp.), three groups of flies were fed at different intervals to raise their fat content to different levels before their flight activity was recorded. The greater the mean daily blood intake, the higher the fat content and the greater the subsequent spontaneous flight activity, thereby using up almost all of the fat reserves before the next blood meal. It is proposed that although male flies would benefit from maximum food intake to permit maximum flight associated with mate-seeking, they do not in fact feed as often as possible either in the field or the laboratory. This is explicable if energy acquisition is constrained by an additional mortality risk associated with feeding.
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