Repeatability of sperm size in outbred and inbred Scathophaga stercoraria (Diptera: Scathophagidae)
نویسندگان
چکیده
منابع مشابه
Systematic ambiguity in the well-established model system insect Scathophaga stercoraria (Diptera: Scathophagidae): sister species S. soror revealed by molecular evidence
Even for well-established insect model systems, such as the yellow dung fly Scathophaga stercoraria (Linnaeus) (Diptera: Scathophagidae), there may be hidden systematic ambiguities that require clarification. Dung flies from the Afrotropical Region have been considered (i) as con-specific and not different from all the other Holarctic Scathophaga stercoraria; (ii) as a local and peculiar Africa...
متن کاملThe effect of fluctuating temperatures during development on fitness-related traits of Scatophaga stercoraria (Diptera: Scathophagidae).
Development of ectotherms is highly temperature dependent. Studies using variable thermal environments can improve ecological relevance of data because organisms naturally face day-to-day stochastic temperature fluctuations as well as seasonal changes in the amplitude of such daily fluctuations. The objective of this study was to investigate if, and to what extent, the use of constant temperatu...
متن کاملSperm survival in the female reproductive tract in the fly Scathophaga stercoraria (L.).
While sperm competition risk favours males transferring many sperm to secure fertilizations, females of a variety of species actively reduce sperm numbers reaching their reproductive tract, e.g. by extrusion or killing. Potential benefits of spermicide to females include nutritional gains, influence over sperm storage and paternity, and the elimination of sperm bearing somatic mutations that wo...
متن کاملHeteropopulation males have a fertilization advantage during sperm competition in the yellow dung fly (Scathophaga stercoraria).
Sexual conflict occurs whenever there is not strict genetic monogamy. The sexually antagonistic coevolution that potentially occurs because of this conflict involves adaptation by one sex followed by the counter-adaptation by the other, and may be thought of as an evolutionary arms-race. As a result of these cycles of antagonistic coevolution, females from one population may be less resistant t...
متن کاملCopula in yellow dung flies (Scathophaga stercoraria): investigating sperm competition models by histological observation.
While sperm competition has been extensively studied, the mechanisms involved are typically not well understood. Nevertheless, awareness of sperm competition mechanisms is currently recognised as being of fundamental importance for an understanding of many behavioural strategies. In the yellow dung fly, a model system for studies of sperm competition, second male sperm precedence appears to res...
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ژورنال
عنوان ژورنال: The Canadian Entomologist
سال: 2007
ISSN: 0008-347X,1918-3240
DOI: 10.4039/n06-063