Is reduced female survival after mating a by-product of male-male competition in the dung fly Sepsis cynipsea?
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چکیده
منابع مشابه
Alternative mating tactics in the yellow dung fly: resolving mechanisms of small-male advantage off pasture.
Recent work suggests that the yellow dung fly mating system may include alternative patroller-competitor mating tactics in which large males compete for gravid females on dung, whereas small, non-competitive males search for females at foraging sites. Small males obtain most matings off pasture, yet the behavioural mechanism(s) giving rise to this pattern are unknown. We investigated the male a...
متن کاملSize-dependent alternative male mating tactics in the yellow dung fly, Scathophaga stercoraria.
Whenever males can monopolize females and/or resources used by females, the opportunity for sexual selection will be great. The greater the variation among males in reproductive success, the greater the intensity of selection on less competitive males to gain matings through alternative tactics. In the yellow dung fly, Scathophaga stercoraria, males aggressively compete for access to receptive,...
متن کاملKilling the competition : Female/female and male/male homicide.
Sex- and age-specific rates of killing unrelated persons of one's own sex were computed for Canada (1974-1983), England/Wales (1977-1986), Chicago (1965-1981), and Detroit (1972) from census information and data archives of all homicides known to police. Patterns in relation to sex and age were virtually identical among the four samples, although the rates varied enormously (from 3.7 per millio...
متن کاملLongevity and Developmental Stability in the Dung Fly Sepsis cynipsea, as Affected by the Ectoparasitic Mite, Pediculoides mesembrinae
Fluctuating asymmetry (FA) is a widely employed measure of developmental stability. It has been found to increase with many stressors including parasite infection. Associations between parasites and FA may exist for several reasons in addition to parasites being the direct cause of increased FA. Developmentally stable individuals may have superior immune systems, and be less susceptible to para...
متن کاملSperm Displacement in the Yellow Dung Fly, Scatophaga stercoraria: An Investigation of Male and Female Processes.
Despite the ubiquity with which patterns of sperm utilization have been studied, the mechanisms underlying fertilization in insects are far from clear. One well-studied system is the yellow dung fly, in which the last male's ejaculate is thought to displace rival sperm from the female's sperm stores. Here we follow the movement of the copulating male's ejaculate through the female's reproductiv...
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ژورنال
عنوان ژورنال: BMC Evolutionary Biology
سال: 2007
ISSN: 1471-2148
DOI: 10.1186/1471-2148-7-194