It is commonly assumed that because males produce many, tiny sperm, they are cheap to produce. Recent work, however, suggests that sperm production is not cost-free. If sperm are costly to produce, ...
Sex pheromones are vital in facilitating the chemical communication that underpins insect courtship and mating behavior. Among female American cockroaches (Periplaneta americana), two key volatile sex ...
WASHINGTON – Scientists have identified the “come hither” scent that female German cockroaches use to lure males, a discovery that may help control one of the world’s most troublesome and resistant ...
Female cockroach droppings contained about 2,900 endotoxin units per milligram – more than twice the amount found in male droppings (1,400 EU/mg). On average, each female released around 5,000 ...
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