Nuptial gifts
نویسندگان
چکیده
Figure 1. Nuptial gifts of insects. An array of nuptial gifts provided by male insects. Top left: during mating, a female dance fly (Diptera: Empididae) feeds upon a dead insect provided by her mate (Photo: Rob Knell). Top right: a male scorpionfly (Mecoptera: Panorpodidae) secretes a white salivary mass that will be consumed by a female during mating (Photo: Arp Kruithof). Bottom left: after mating, a female camel cricket (Orthoptera: Rhaphidophoridae) consumes a gelatinous spermatophylax that the male has attached to her genitalia (Photo: Arthur Anker). Bottom right: a spermatophore manufactured by a firefly male (Coleoptera: Lampyridae) and transferred internally to the female reproductive tract. Nuptial gifts
منابع مشابه
Functional equivalence of grasping cerci and nuptial food gifts in promoting ejaculate transfer in katydids.
The function of nuptial gifts has generated longstanding debate. Nuptial gifts consumed during ejaculate transfer may allow males to transfer more ejaculate than is optimal for females. However, gifts may simultaneously represent male investment in offspring. Evolutionary loss of nuptial gifts can help elucidate pressures driving their evolution. In most katydids (Orthoptera: Tettigoniidae), ma...
متن کاملSensory exploitation as an evolutionary origin to nuptial food gifts in insects.
Nuptial food gifts given by males to females at mating are widespread in insects, but their evolutionary origin remains obscure. Such gifts may arise as a form of sensory trap that exploits the normal gustatory responses of females, favouring the selective retention of sperm of gift-giving males. I tested this hypothesis by offering foreign food gifts, synthesized by males of one cricket specie...
متن کاملIs diversification in male reproductive traits driven by evolutionary trade-offs between weapons and nuptial gifts?
Many male animals have evolved exaggerated traits that they use in combat with rival males to gain access to females and secure their reproductive success. But some male animals invest in nuptial gifts that gains them access to females. Both these reproductive strategies are costly in that resources are needed to produce the weapon or nuptial gift. In closely related species where both weapons ...
متن کاملUnpredictable food and sexual size dimorphism in insects
The evolution of sexual size dimorphism is likely to be affected by the am ount of resources each sex invests in offspring. M ale nuptial gifts, occurring in m any insect species, might reduce the value of large size in females and increase the value for males. For large nuptial gifts and an accom panying shift in dimorphism to evolve, males with larger gifts should be rewarded, in effect tradi...
متن کاملUnpredictable food and sexual size dimorphism in insects.
The evolution of sexual size dimorphism is likely to be affected by the amount of resources each sex invests in offspring. Male nuptial gifts, occurring in many insect species, might reduce the value of large size in females and increase the value for males. For large nuptial gifts and an accompanying shift in dimorphism to evolve, males with larger gifts should be rewarded, in effect trading t...
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ورودعنوان ژورنال:
- Current Biology
دوره 21 شماره
صفحات -
تاریخ انتشار 2011