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Sex ratio variations in xylophilous aculeate Hymenoptera

Sex ratio variations in xylophilous aculeate Hymenoptera

Evolution 35.3: 597-600

Pine blocks, each drilled with a single hole 95 mm deep and of 1 of 5 diameters (3, 5, 7, 9 or 11 mm), were placed in a field at Lake Opinicon, Ontario, Canada, during the summer of 1977. Traps used as nest sites by various Hymenoptera were removed and the occupying larvae reared in the laboratory. Results indicated that variations in sex ratio occurred with differing diameters of nest holes used and that greater relative numbers of males were laid in the smaller diameter nest holes.

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Accession: 001250969

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DOI: 10.2307/2408206

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