Tức là "bắn hết đạn"?
để tránh bị nhện cái ăn thịt, nhện đực... xuất tinh nhiều nhất có thể... :))
When sexual conflict (xung đột) results in reproductive (sinh sản) strategies (chiến lược) that only benefit one of the sexes, it may result in evolutionary (tiến hóa) arms races (chạy đua vũ trang). Male spiders have evolved behavioral mating strategies to improve their chances of mating despite the risk of being cannibalized (ăn thịt đồng loại) by their mates.
Researchers from the National University of Singapore (NUS) have discovered that male spiders make choices on maximizing their mating success when they are at risk of being cannibalized by their female mates. Led by Associate Professor Li Daiqin from the NUS Department of Biological Sciences, the researchers found that a male chooses one of its paired sexual organs with more sperm for the first copulation (giao hợp) with a cannibalistic female. Also, a male transfers significantly more sperm if a female is cannibalistic or when the female is of a much larger physical size.
Bài trước: Sẽ phọt ra với tốc độ bao nhiêu nhỉ?