Local mate competition and the sex ratio

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August undefined, 2024

Witryna1 lip 1998 · Sex ratio evolution under local mate compe-tition in a parasitic wasp. Brood size and sex ratio regulation in the parasitic wasp Nasonia vitripennis. Partial … WitrynaLocal mate competition favours a female-biased sex ratio because a reduction in the number of sons means less competi tion for mates and an increase in the number of daughters means

Sex ratios under asymmetrical local mate competition in the …

WitrynaBecause sex ratios are tightly linked to fitness, they can be under strong selection or plastic in response to changing demographic conditions. Hamilton [1] pointed out that an equality of the sex ratio breaks down when there is local competition for mates. Competition for mates can be considered as a special case of local resource … WitrynaKeywords Local mate competition.Ooencyrtus kuvanae. Solitary egg parasitoid.Sex ratio.Local resource competition Introduction Fitness consequences associated with controlling the sex ratio of offspring have been considered since Darwin (1871). In randomly mating populations, the evolutionary stable strategy is to invest equally in … medstar georgetown university hospital addres

Factors affecting female-biased sex ratio in a trap-nesting wasp,

Witryna28 sty 2024 · Sex ratio theory predicts that, under local mate competition, a more female‐biased offspring sex ratio will be produced by females when their relatedness … WitrynaWest, S A & Herre, E A (1998a) Partial local mate competition and the sex ratio: a study on non-pollinating fig wasps. Journal of Evolutionary Biology, 11, … Witryna26 wrz 2012 · Sex-ratio adjustments are commonly observed in haplodiploid species. However, the underlying proximate mechanisms remain elusive. We investigated … nally properties

Sex ratio, local mate competition and mating behaviour in …

(PDF) Local mate competition in the solitary parasitoid

Witryna9 lut 2024 · Introduction. Sex ratio theory, beginning with the work of Düsing (1884) and Fisher (1930) (see Gardner, 2024, for an overview of the early history of the field) and … Witryna13 lip 2004 · Sex allocation theory offers excellent opportunities for studying the precision of adaptation. One of the best-supported areas in the field of sex allocation is Hamilton's theory of local mate competition, which predicts female-biased offspring sex ratios when populations are structured such that mating takes place locally before females … medstar georgetown university hospital einWitrynastructured populations (where sex ratio is defined as the proportion of males). Hamilton (1967) demonstrated that when the offspring of one or a few mothers mate amongst … nally properties llc

"Witryna8 paź 2015 · We took a comparative, laboratory-based approach using 16 groups (species or strains) of bean beetles (genera Acanthoscelides, Callosobruchus, and Zabrotes, including 10 strains of one species) to test two predictions that emerge from dominant hypotheses for the evolution of SBD: (1) groups that suffer greater costs of … " - Local mate competition and the sex ratio

Local mate competition and the sex ratio

Sex ratios — University of Edinburgh Research Explorer

WitrynaEXPLORE THE UNIVERSITY OF OXFORD'S WORLD-CLASS RESEARCH. search for. Targeted search options Witryna1 lut 1986 · Local mate competition and the sex ratio. J Theor Biol, 86, 409–419. Article CAS Google Scholar Van Tienderen, P H. 1984. Eigenvalues and the search for evolutionary stable strategies in patchy ...

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Witryna12 sty 2024 · Local mate competition (LMC) favours female biased clutch sex ratios because it reduces competition between brothers and provides extra mating opportunities for sons. Fig wasps seem to fit LMC model assumptions and lay female-biased sex ratios as predicted. These female biased sex ratios increase fitness … WitrynaSex is the trait that determines whether a sexually reproducing organism produces male or female gametes. Male plants and animals produce small mobile gametes (spermatozoa, sperm, pollen), while females produce larger, non-motile ones (ova, often called egg cells). Organisms that produce both types of gametes are called …

WitrynaLocal Mate Competition and the Sex Ratio? P. D. TAYLOR AND M. G. BULMERS Department of Mathematics and Statistics, Queen’s University, Kingston, Ontario, … WitrynaAbstract Local mate competition (LMC) occurs when brothers compete with each other for mating opportunities, resulting in selection for a female-biased sex ratio within local groups. If multiple females oviposit in the same patch, their sons compete for mating opportunities with non-brothers. Females, in the presence of other females, should

WitrynaSex ratio theory allows unparalleled opportunities for testing how well animal behavior can be predicted by evolutionary theory. For example, Hamilton's theory of local … WitrynaHamilton (1967) pointed out that Fisher's (1930) argument predicting an equality of the sex ratio may break down when there is local competition for mates. He considered …

Witryna28 sty 2024 · Sex ratio theory predicts that, under local mate competition, a more female‐biased offspring sex ratio will be produced by females when their relatedness to their mates is closer. We assess how the sexual composition of broods responds to mother–mate relatedness using Goniozus legneri Gordh (Hymenoptera: Bethylidae), …

Witryna21 gru 2014 · The local mate competition model from sex ratio theory predicts female-biased sex ratios in populations that are highly subdivided during mating, and is … medstar georgetown university hospital gmeWitryna1 mar 1987 · The ICS is known as local mate competition 6 , local resource competition 7 , and local resource enhancement 8 , where only individuals of either sex compete or cooperate with their relatives. nally properties lakeland flWitrynaHamilton’s theory of local mate competition, which predicts female‐biased sex ratios in structured populations, has been extended in numerous directions to predict individual behavior in response to factors such as relative fecundity, time of oviposition, and relatedness between cofoundresses and between mates. medstar georgetown university hospital emailWitrynaLocal mate competition (LMC) favours female biased clutch sex ratios because it reduces competition between brothers and provides extra mating opportunities for sons. Fig wasps seem to fit LMC model assumptions and lay female-biased sex ratios as predicted. These female biased sex ratios increase fitness greatly. nally pttWitrynaN2 - Sex ratio theory attempts to explain variation at all levels (species, population, individual, brood) in the proportion of offspring that are male (the sex ratio). ... KW - LOCAL MATE COMPETITION. KW - PARASITIC WASP. KW - QUANTITATIVE GENETICS. KW - POPULATION-STRUCTURE. KW - SEYCHELLES WARBLERS. … medstar georgetown university hospital giWitrynasex allocation. Item Type. Journal article 16; Conference item 1; Thesis 1; File Availability. Not available 12; Available 6; Division. MPLS 8; Department. Zoology 6; Plant Sciences 2; College. Linacre College 1; St Hilda's College 1; Wolfson College 1; Research Group. Edward Grey Institute of Field Ornithology 2; Subject. nally porcelain repairWitrynaScience. Females of the parasitic wasp Nasonia vitripennis adjust the sex ratio of their broods according to whether they are a first or second wasp to parasitize a host. The … medstar georgetown surgery center