Abstract
AbstractWhen female Tribolium castaneum (Herbst) were sequentially paired with male T. castaneum and then with male T. confusum Jacquelin duVal, 93% of the eggs hatched after the first confinement but only 58.9% hatched after the second confinement. The reciprocal order of pairing produced 0% hatch after the first week of confinement and 55.2% hatch after the second week of confinement. However, the numbers of progeny produced as a result of both sequences were proportional to the percentage hatch. Thus, T. castaneum females appeared to have mated with, and utilized sperm from, males of both species for egg fertilization.When T. confusum females were sequentially paired in the same way, reductions in egg hatch and production of progeny did not occur. The females either did not mate with T. castaneum males, or if they did mate, they did not utilize T. castaneum sperm for egg fertilization. Moreover the percentage of egg hatch and the numbers of progeny produced were not affected by the sequential order of males as long as one of them was T. confusum.
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