Mating Preference, AnimalSexual Behavior, AnimalPoeciliaCyprinodontiformesReproductionCourtshipSex AttractantsPigmentationCopulationChoice BehaviorPaternityAnimal CommunicationSocial DominanceGryllidaeSex CharacteristicsBiological EvolutionCichlidsBody SizeIlex paraguariensisVocalization, AnimalSelection, GeneticGenetic VariationSpermatozoaSpecies SpecificityMicrosatellite RepeatsPair BondGenitalia, FemaleOrganic Cation Transport ProteinsCompetitive BehaviorSex RatioFertilitySex FactorsSongbirdsImprinting (Psychology)PheromonesTerritorialityOvipositionBeautyInbreedingPaternal BehaviorPasseriformesInseminationFinchesCondoms, FemaleSocial BehaviorButterfliesColorCrosses, GeneticPregnancyBeveragesBreedingNesting BehaviorOvariectomyTime FactorsBehavior, AnimalUruguayOdorsCannibalismSpidersAggressionSmegmamorphaInfertility, FemaleGenetic FitnessEstradiolSparrowsSexual MaturationBody WeightPhenotypeMarriageWaspsAge FactorsBeetlesGenetic SpeciationSmellAntiportersAnalysis of VarianceOvaryAgonistic BehaviorFeathersTrinidad and TobagoLizardsBirdsDisorders of Sex Development1-Methyl-4-phenylpyridiniumDrosophila melanogasterTestosteroneClutch SizeModels, BiologicalPredatory BehaviorHydrocarbonsParaguayGroomingSingingMaternal BehaviorRotiferaHybridization, GeneticOvumArvicolinaeMasculinityFeeding Behavior