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characteristics and spermatophore mass in Photinus ignitus fireflies. We determined female preference by scoring female flash response …-collected males. Males were then mated to determine spermatophore mass. Females exhibited greater preference for artificial flashes … of the variation in spermatophore mass for early-season males. These results suggest that female Photinus ignitus may …
Persistent link: https://www.econbiz.de/10008581683
In many species males that tend to win fights against other males are more attractive to females. There are three ways in which male fighting ability and attractiveness may be associated: (1) attractiveness and fighting ability are influenced by the same underlying traits (e.g., body size), (2)...
Persistent link: https://www.econbiz.de/10008581265
Postcopulatory processes might play an important role in sexual selection. In theory, fertilization success could be controlled by females via selection of particular sperm within their reproductive tract, or it could be determined by sperm competition per se. In practice, these two mechanisms...
Persistent link: https://www.econbiz.de/10008581519
Persistent link: https://www.econbiz.de/10012244819
Parasites can influence various aspects of host reproduction and mating, including spermatophore production. In the … cricket, Gryllodes sigillatus, males transfer to females a two-part spermatophore containing a sperm-filled ampulla and a …
Persistent link: https://www.econbiz.de/10008581483
oceanicus. Sperm length did not influence the rate of migration of sperm from the spermatophore to the female's spermatheca. We …
Persistent link: https://www.econbiz.de/10008581568
Supply and demand largely determine the price of goods on human markets. It has been proposed that in animals, similar forces influence the payoff distribution between trading partners in Sexual selection, intraspecific cooperation and interspecific mutualism. Here we present the first...
Persistent link: https://www.econbiz.de/10009448002
The allocation of limited resources to competing body parts during development may affect both the absolute and relative sizes of physical traits, creating potentially dramatic consequences for the evolution of morphology. While negative correlations between the sizes of body parts...
Persistent link: https://www.econbiz.de/10009450827
Theoretical models of mate choice and sexual selection typically make one of two simplifying assumptions. Either mate-preferences are assumed to be uniform (e.g., all females have the same preferences with respect to males), or mate-choice is assumed to be a one-sided affair (e.g., females do...
Persistent link: https://www.econbiz.de/10009460793
We examine a strategic-choice handicap model in which males send costly signals to advertise their quality to females. Females are concerned with the net viability of the male with whom they mate, where net viability is a function of the male's quality and signal. We identify circumstances in...
Persistent link: https://www.econbiz.de/10010317667