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The Cannibalistic Phenomenon Of Adults And Larvae Of The Confused Flour
Beetle, Tribolium confusum (Coleoptera:Tenebrionidae)
Hassan Maghrabi and Nawal Mahfuod, Zoology Department, Faculty
of Science, Al-Fatah University, P.O Box 13799, Tripoli, Libya
E-mail: Drmaghrabi@Yahoo.com
Abstract
The phenomenon of cannibalism was examined as it is practiced by the confused
flour beetle : The consumption of eggs (E) and pupae (P) by larvae (L) and
adults (A). The insect cultures were maintained on whole-wheat flour , yeast ,
and no-food for 24 and 48 hrs at 29 C and 70% relative humidity. ANOVA of the
data revealed that cannibalistic mean rates of (Ex L and A), (LxA), (PxL),
(LxPxA), and time periods were significantly different (P<0.01). On the other
hand, yeast medium showed less cannibalistic effect on the insect than flour.
But with lack of food, a great cannibalistic pressure was observed. The
importance of intraspecific cannibalism both as a source of mortality and as
population regulatory mechanism for the Tribolium confusum is stressed
throughout this work.
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