Male brooding behaviour of the giant water bugLethocerus deyrollei vuillefroy (Hemiptera: Belostomatidae)
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The male brooding behaviour ofLethocerus deyrollei was investigated. Eggs were laid as masses on sticks above the water surface. Males did not leave the sticks until the eggs hatched. They mainly stayed at the bases of the sticks in water in the day, and frequently climbed up at night covering the egg-masses with their bodies. Eggs with male brooding had a 94.3% hatching rate. Eggs without male brooding failed to hatch and desiccated. Eggs with brooding considerably increased in wet weight in development; eggs without brooding decreased in wet weight. Eggs without male brooding and artificially supplied with water had a 93.2% hatching rate. Male brooding is considered to supply eggs with water.
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