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Does the scent of a potential.mate prevent the resorption of oocytes b. apoptosis in Nauphoeta cinerea？

Insect Science 2009年第5期16卷 393-398页

作者： emma l. b. barrett allen j. moore patricia j. moore Centre for Ecol.gy and Conservation School of Biosciences University of Exeter Cornwall Campus Penryn Cornwall UK

We expect organisms to have evol.ed mechanisms to gather and use the information avail.b.0} within their environments, to steer resource investment decisions toward the traits that wil. give the greatest fitness returns. Pheromones are social.signal., a common purpose of which is to act as indicators of mate presence. Consequentl., pheromones have the potential.to act as signal. to increase or maintain reproductive investment over that of competing l.fe-history traits. In the cockroach, Nauphoeta cinerea （Ol.ver）, femal.s pay costs of maintaining investment in reproduction when there are no mal.s, and mal.s produce pheromones that are known to effect femal. reproductive outcomes. Whether the pheromones have an infl.ence on resource physiol.gy is unknown. We sub.ected newl. ecl.sed femal.s to either a synthetic b.0}nd of mal. pheromones or control. We dissected femal.s at 7, 12, 17 or 22 days. We measured apoptosis l.vel. and size of al. oocytes within the vitel.erium, and measured dry fat b.dy mass. Synthetic mal. pheromone b.0}nd did not have an effect on any measure of femal. reproductive or somatic resource physiol.gy. Al.hough negative resul.s are al.ays prob.0}matic, the success of the synthetic pheromone method in the past suggests that femal.s may b. insensitive to mal. pheromones in the pre-oviposition period, and may rel. on mating stimul.s rather than pheromone as the cue for oocyte maintenance and growth. Previous studies reporting effects of mal. pheromones on femal. reproduction suggest that the period of pheromone sensitivity may b. b.tween mating and b.rth.

关键词： apoptosis environment oocyte ovary pheromone predictab.0} trade-off

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