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assortative mating

Kelly L Ronald, Esteban Fernández-Juricic, Jeffrey R Lucas
A common assumption in sexual selection studies is that receivers decode signal information similarly. However, receivers may vary in how they rank signallers if signal perception varies with an individual's sensory configuration. Furthermore, receivers may vary in their weighting of different elements of multimodal signals based on their sensory configuration. This could lead to complex levels of selection on signalling traits. We tested whether multimodal sensory configuration could affect preferences for multimodal signals...
May 16, 2018: Proceedings. Biological Sciences
Bo-Jian Chen, Kai Liu, Lin-Jun Zhou, Guilherme Gomes-Silva, Carolin Sommer-Trembo, Martin Plath
Consistent individual differences in behavioral tendencies (animal personality) can affect individual mate choice decisions. We asked whether personality traits affect male and female mate choice decisions similarly and whether potential personality effects are consistent across different mate choice situations. Using western mosquitofish (Gambusia affinis) as our study organism, we characterized focal individuals (males and females) twice for boldness, activity, and sociability/shoaling and found high and significant behavioral repeatability...
2018: PloS One
Aditya Ponkshe, John A Endler
Recent developments in sexual selection theory suggest that on their own, mate preferences can promote the maintenance of sexual trait diversity. However, how mate preferences constrain the permissiveness of sexual trait diversity in different environmental regimes remains an open question. Here, we examine how a range of mate choice parameters affect the permissiveness of sexual trait polymorphism under several selection regimes. We use the null model of sexual selection and show that environments with strong assortative mating significantly increase the permissiveness of sexual trait polymorphism...
May 2018: Ecology and Evolution
Hermine H Maes, Kate Morley, Michael C Neale, Kenneth S Kendler, Andrew C Heath, Lindon J Eaves, Nicholas G Martin
BACKGROUND: Considerable evidence from twin and adoption studies indicates that genetic and shared environmental factors play a role in the initiation of smoking behavior. Although twin and adoption designs are powerful to detect genetic and environmental influences, they do not provide information on the processes of assortative mating and parent-offspring transmission and their contribution to the variability explained by genetic and/or environmental factors. METHODS: We examined the role of genetic and environmental factors in individual differences for smoking initiation (SI) using an extended kinship design...
May 14, 2018: Twin Research and Human Genetics: the Official Journal of the International Society for Twin Studies
Abdel Abdellaoui, Hsi-Yuan Chen, Gonneke Willemsen, Erik A Ehli, Gareth E Davies, Karin J H Verweij, Michel G Nivard, Eco J C de Geus, Dorret I Boomsma, John T Cacioppo
OBJECTIVE: Loneliness is an aversive response to a discrepancy between desired and actual social relationships and correlates with personality. We investigate the relationship of loneliness and personality in twin-family and molecular genetic data. METHOD: Phenotypic correlations between loneliness and the Big Five personality traits were estimated in 29,625 adults, and in a group with genome-wide genotype data (N=4,222), genetic correlations were obtained. We explored whether genetic correlations may reflect causal relationships by investigating within monozygotic twin-pair differences (Npairs =2,662), by longitudinal within-subject changes in personality and loneliness (N=4,260-9,238 longitudinal comparisons), and by longitudinal cross-lagged panel analyses (N=15,628)...
May 12, 2018: Journal of Personality
D Justin Yeh, Janette W Boughman, Glenn-Peter Saetre, Maria R Servedio
Reinforcement is the process whereby assortative mating evolves due to selection against costly hybridization. Sexual imprinting could evolve as a mechanism of reinforcement, decreasing hybridization, or it could potentially increase hybridization in genetically purebred offspring of heterospecific social pairs. We use deterministic population genetic simulations to explore conditions under which sexual imprinting can evolve through reinforcement. We demonstrate that a sexual imprinting component of female preference can evolve as a one-allele assortative mating mechanism by reducing the risk of hybridization, and is generally effective at causing trait divergence...
May 9, 2018: Evolution; International Journal of Organic Evolution
Joseph W Hinton, John L Gittleman, Frank T van Manen, Michael J Chamberlain
Anthropogenic hybridization of historically isolated taxa has become a primary conservation challenge for many imperiled species. Indeed, hybridization between red wolves ( Canis rufus ) and coyotes ( Canis latrans ) poses a significant challenge to red wolf recovery. We considered seven hypotheses to assess factors influencing hybridization between red wolves and coyotes via pair-bonding between the two species. Because long-term monogamy and defense of all-purpose territories are core characteristics of both species, mate choice has long-term consequences...
April 2018: Ecology and Evolution
Marion Nicolaus, Pim Edelaar
Organisms commonly experience significant spatiotemporal variation in their environments. In response to such heterogeneity, different mechanisms may act that enhance ecological performance locally. However, depending on the nature of the mechanism involved, the consequences for populations may differ greatly. Building on a previous model that investigated the conditions under which different adaptive mechanisms (co)evolve, this study compares the ecological and evolutionary population consequences of three very different responses to environmental heterogeneity: matching habitat choice (directed gene flow), adaptive plasticity (associated with random gene flow), and divergent natural selection...
April 2018: Ecology and Evolution
Clara J Rodríguez-Zárate, Jonathan Sandoval-Castillo, Erik van Sebille, Robert G Keane, Axayácatl Rocha-Olivares, Jose Urteaga, Luciano B Beheregaray
Spatial and temporal scales at which processes modulate genetic diversity over the landscape are usually overlooked, impacting the design of conservation management practices for widely distributed species. We examine processes shaping population divergence in highly mobile species by re-assessing the case of panmixia in the iconic olive ridley turtle from the eastern Pacific. We implemented a biophysical model of connectivity and a seascape genetic analysis based on nuclear DNA variation of 634 samples collected from 27 nesting areas...
May 16, 2018: Proceedings. Biological Sciences
Aldo Córdova-Palomera, Tobias Kaufmann, Francesco Bettella, Yunpeng Wang, Nhat Trung Doan, Dennis van der Meer, Dag Alnæs, Jaroslav Rokicki, Torgeir Moberget, Ida Elken Sønderby, Ole A Andreassen, Lars T Westlye
Cognitive and brain development are determined by dynamic interactions between genes and environment across the lifespan. Aside from marker-by-marker analyses of polymorphisms, biologically meaningful features of the whole genome (derived from the combined effect of individual markers) have been postulated to inform on human phenotypes including cognitive traits and their underlying biological substrate. Here, estimates of inbreeding and genetic susceptibility for schizophrenia calculated from genome-wide data-runs of homozygosity (ROH) and schizophrenia polygenic risk score (PGRS)-are analyzed in relation to cognitive abilities (n = 4183) and brain structure (n = 516) in a general-population sample of European-ancestry participants aged 8-22, from the Philadelphia Neurodevelopmental Cohort...
April 27, 2018: European Journal of Human Genetics: EJHG
Zhenchao Qian, Daniel T Lichter
Drawing on data from the American Community Survey, we compare patterns of assortative mating in first marriages, remarriages, and mixed-order marriages. We identify a number of ascribed and achieved characteristics that are viewed as resources available for exchange, both as complements and substitutes. We apply conditional logit models to show how patterns of assortative mating among never-married and previously married persons are subject to local marriage market opportunities and constraints. The results reveal that previously married individuals "cast a wider net": spousal pairings are more heterogamous among remarriages than among first marriages...
April 24, 2018: Demography
Satoshi Kanazawa, Shihao Hu, Adrien Larere
Kanazawa and Still (2018) showed that very unattractive workers earned more than unattractive workers, sometimes more than average-looking or attractive workers, because they had higher levels of intelligence and education, but they did not explain why very unattractive workers had higher intelligence and education. There are both theoretical and empirical reasons to expect that some intelligent men may prefer to marry very unattractive women. The analysis of the National Longitudinal Study of Adolescent Health (Add Health) shows that very unattractive women were significantly more likely to be married at Age 29 than unattractive or average-looking women, and their spouses or partners earned significantly more than those of unattractive or average-looking women...
March 22, 2018: Economics and Human Biology
Klaus Jaffe
Computer experiments that mirror the evolutionary dynamics of sexual and asexual organisms as they occur in nature were used to test features proposed to explain the evolution of sexual recombination. Results show that this evolution is better described as a network of interactions between possible sexual forms, including diploidy, thelytoky, facultative sex, assortation, bisexuality, and division of labor between the sexes, rather than a simple transition from parthenogenesis to sexual recombination. Diploidy was shown to be fundamental for the evolution of sex; bisexual reproduction emerged only among anisogamic diploids with a synergistic division of reproductive labor; and facultative sex was more likely to evolve among haploids practicing assortative mating...
April 16, 2018: Journal of Biological Physics
Carolin Dittrich, Ariel Rodríguez, Ori Segev, Sanja Drakulić, Heike Feldhaar, Miguel Vences, Mark-Oliver Rödel
Assortative mating is a common pattern in sexually reproducing species, but the mechanisms leading to assortment remain poorly understood. By using the European common frog ( Rana temporaria ) as a model, we aim to understand the mechanisms leading to size-assortative mating in amphibians. With data from natural populations collected over several years, we first show a consistent pattern of size-assortative mating across our 2 study populations. We subsequently ask if assortative mating may be explained by mate availability due to temporal segregation of migrating individuals with specific sizes...
March 2018: Behavioral Ecology: Official Journal of the International Society for Behavioral Ecology
Demetra Andreou, Christophe Eizaguirre, Thomas Boehm, Manfred Milinski
Adaptation to ecologically contrasting niches can lead to the formation of new species. Theoretically, this process of ecological speciation can be driven by pleiotropic "magic traits" that genetically link natural and sexual selection. To qualify as a true magic trait, the pleiotropic function of a gene must be reflected in biologically relevant mechanisms underlying both local adaptation and mate choice. The immune genes of the major histocompatibility complex (MHC) contribute to parasite resistance and also play a major role in sexual selection...
July 2017: Behavioral Ecology: Official Journal of the International Society for Behavioral Ecology
Mariana Castro, Sílvia Castro, Albano Figueiredo, Brian Husband, João Loureiro
The distribution of cytotypes in mixed-ploidy species is crucial for evaluating ecological processes involved in the establishment and evolution of polyploid taxa. Here, we use flow cytometry and chromosome counts to explore cytotype diversity and distributions within a tetraploid-octoploid contact zone. We then use niche modelling and ploidy seed screening to assess the roles of niche differentiation among cytotypes and reproductive interactions, respectively, in promoting cytotype coexistence. Two cytotypes, tetraploids and octoploids, were dominant within the contact zone...
March 2018: AoB Plants
Magdalena Śmieja, Maciej Stolarski
Assortative mating has been studied on a broad range of variables, including intelligence and personality traits. In the present study we analysed the effect of assortative mating for ability emotional intelligence (EI) on a sample of heterosexual couples ( N  = 382), including dating and married couples. Correlation analyses revealed moderate similarity of Pearson's r  = .27 for general EI score, and was slightly weaker (from .18 to .23) for branch scores. Regression analyses showed that the Perception branch was the strongest single predictor of a partner's general EI score, both in males and females...
2018: Current Psychology
Michelle R Gaither, Georgios A Gkafas, Menno de Jong, Fatih Sarigol, Francis Neat, Thomas Regnier, Daniel Moore, Darren R Grӧcke, Neil Hall, Xuan Liu, John Kenny, Anita Lucaci, Margaret Hughes, Sam Haldenby, A Rus Hoelzel
Intraspecific diversity promotes evolutionary change, and when partitioned among geographic regions or habitats can form the basis for speciation. Marine species live in an environment that can provide as much scope for diversification in the vertical as in the horizontal dimension. Understanding the relevant mechanisms will contribute significantly to our understanding of eco-evolutionary processes and effective biodiversity conservation. Here, we provide an annotated genome assembly for the deep-sea fish Coryphaenoides rupestris and re-sequencing data to show that differentiation at non-synonymous sites in functional loci distinguishes individuals living at different depths, independent of horizontal spatial distance...
April 2018: Nature Ecology & Evolution
Elizabeth K Peterson, Roman Yukilevich, Joanne Kehlbeck, Kelly M LaRue, Kyle Ferraiolo, Kurt Hollocher, Helmut V B Hirsch, Bernard Possidente
Anthropogenic pollutants have the potential to disrupt reproductive strategies. Little is known about how lead (Pb2+ ) exposure disrupts individual-level responses in reproductive behaviors, which are important for fitness. Drosophila melanogaster was used as a model system to determine the effects of: 1) developmental lead exposure on pre-mating reproductive behaviors (i.e., mate preference), and 2) lead exposure and mating preferences on fitness in the F 0 parental generation and F 1 un-exposed offspring...
April 2017: Current Zoology
Joshua M Miller, Maud C Quinzin, Elizabeth H Scheibe, Claudio Ciofi, Fredy Villalva, Washington Tapia, Adalgisa Caccone
An aim of many captive breeding programs is to increase population sizes for reintroduction and establishment of self-sustaining wild populations. Genetic analyses play a critical role in these programs: monitoring genetic variation, identifying the origin of individuals, and assigning parentage to track family sizes. Here we use genetic pedigree analyses to examine three seasons of a pilot breeding program for the Floreana island Galapagos giant tortoise, C. niger, that had been declared extinct for ~150 years until individuals with mixed ancestry were recently discovered...
February 27, 2018: Journal of Heredity
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