I use multilocus genetics to describe assortative mating in a competition model. The intensity of competition between individuals is influenced by a quantitative character whose value is determined additively by alleles from many loci. With assortative mating based on this character, frequencyand density-dependent competition can subdivide a population with an initially unimodal character distr...

Mate choice results from the sensory or behavioural properties that cause individuals to mate with some phenotypes and not others. It can result in direct indirect (genetic) benefits. also be influenced by various abiotic biotic factors including mating system. Here, we investigated how system of ladybird, Menochilus sexmaculatus, influences affects time commencement mating, copulation duration...

Reproduction comes at a cost, including accelerated death. Previous studies of the interconnections between reproduction, lifespan, and fat metabolism in C. elegans were predominantly performed low-reproduction conditions. To understand how increased reproduction affects lifespan metabolism, we examined mated worms; find that Δ9 desaturase, FAT-7, is significantly up-regulated. Dietary suppleme...

1. The persistence of multiple mating remains one of the fundamental questions in evolutionary biology. In theory, multiple mating is predicted to improve female fitness cumulatively through direct and/or genetic benefits. However, intra-locus sexual conflicts may potentially constrain or even eliminate these benefits owing to the gender load imposed by sexually antagonistic selection. 2. Here,...

The improvement of techniques for the mass rearing predators in laboratory, including age mating is important to obtain largest number individuals biological control programs. purpose this study was evaluate females’ fecundity predator Podisus fuscescens (Dallas, 1851) (Hemiptera: Pentatomidae) with different pre-mating periods. females were mated immediately after emergence (T1) or one (T2), t...

Mating preference can be a driver of sexual selection and assortative mating and is, therefore, a key element in evolutionary dynamics. Positive mating preference by similarity is the tendency for the choosy individual to select a mate which possesses a similar variant of a trait. Such preference can be modelled using Gaussian-like mathematical functions that describe the strength of preference...

A general tenet of sexual conflict theory is that males have higher optimum mating rates than do females and therefore should be more persistent when it comes to mating. However, in promiscuous species, females might benefit from high mating rates as a result of increased conception probability with favored males, whereas favored males benefit from mating selectively because of sperm depletion....

In the ciliate Paramecium caudatum, only mating-reactive cells can attach to the polystyrene surface of Petri dishes. The attachment of mating-reactive cells occurs exclusively at the tips of ventrally located cilia (mating-reactive cilia) and appears to involve a hydrophobic interaction. An increase in the hydrophilic nature of the polystyrene surface following treatment with sulphuric acid re...