Sexual cannibalism and population viability
نویسندگان
چکیده
منابع مشابه
Modelling Walleye Population and Its Cannibalism Effect
Walleye is a very common recreational fish in Canada with a strong cannibalism tendency, such that walleyes with larger sizes will consume their smaller counterparts when food sources are limited or a surplus of adults is present. Cannibalism may be a factor promoting population oscillation. As fish reach a certain age or biological stage (i.e. biological maturity), the number of fish achieving...
متن کاملSexual Cannibalism: High Incidence in a Natural Population with Benefits to Females
BACKGROUND Sexual cannibalism may be a form of extreme sexual conflict in which females benefit more from feeding on males than mating with them, and males avoid aggressive, cannibalistic females in order to increase net fitness. A thorough understanding of the adaptive significance of sexual cannibalism is hindered by our ignorance of its prevalence in nature. Furthermore, there are serious do...
متن کاملMates with Benefits: When and How Sexual Cannibalism Is Adaptive
Sexual cannibalism occurs in several arthropod taxa, but its evolutionary significance has long been debated. A new study shows how females that eat their mates benefit in ways that go well beyond caloric nutrition.
متن کاملObligate male death and sexual cannibalism in dark fishing spiders
Male dark fishing spiders (Dolomedes tenebrosus Araneae, Pisauridae) always die during their first and only copulation, making all males monogynous. Such obligate male death can be adaptive if it facilitates sexual cannibalism, and if sexual cannibalism results in male reproductive benefits, such as an advantage in sperm competition through reduced female remating. We first conducted an experim...
متن کاملPopulation dynamic theory of size-dependent cannibalism.
Cannibalism is characterized by four aspects: killing victims, gaining energy from victims, size-dependent interactions and intraspecific competition. In this review of mathematical models of cannibalistic populations, we relate the predicted population dynamic consequences of cannibalism to its four defining aspects. We distinguish five classes of effects of cannibalism: (i) regulation of popu...
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ژورنال
عنوان ژورنال: Ecology and Evolution
سال: 2018
ISSN: 2045-7758
DOI: 10.1002/ece3.4155