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assortative mating

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...
March 5, 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
Tongliang Wang, Lele Jia, Xiaofei Zhai, Jianguo Cui, Jichao Wang
Mating patterns exhibit considerable intra- and interspecific variation. Sexual selection can lead to the occurrence of random and assortative mating in different populations of the same species. Thus, understanding variation in mating decisions is crucial to understanding variation in the direction of sexual selection. We investigated natural mating patterns in Black-spectacled toads (Duttaphrynus melanostictus), an explosive-breeding species that breeds throughout the year. We captured amplectant pairs (137) and non-amplectant males (212) during breeding seasons from November 2016 to April 2017 in tropical-island population of southern China...
February 23, 2018: Behavioural Processes
Stephanie L Smith, Helen V Senn, Sílvia Pérez-Espona, Megan T Wyman, Elizabeth Heap, Josephine M Pemberton
Since the mid-19th century, multiple introductions of Japanese sika deer ( Cervus nippon nippon ) and North American wapiti ( C. canadensis ) have taken place in the British Isles. While wapiti have generally been unsuccessful, sika have been very successful, especially in Scotland where they now overlap at least 40% of the range of native red deer ( C. elaphus ). Hybridization between these two species and red deer has been demonstrated in captivity and in the wild. Using a panel of 22 microsatellite loci that are highly diagnostic between red deer and sika, and moderately diagnostic between red deer and wapiti, we investigated the extent of introgression between these species in 2,943 deer sampled from around Scotland and from the English Lake District using the Bayesian clustering software STRUCTURE...
February 2018: Ecology and Evolution
Guanlin Wang, Chima A Ekeleme-Egedigwe, Asmaa El Hamdouchi, Justina Sauciuvenaite, Ruth Bissland, Kurosh Djafarian, Robert Ojiambo, Harris Ramuth, Sandra Holasek, Sonja Lackner, Adama Diouf, Catherine Hambly, Lobke M Vaanholt, Minxuan Cao, Megan Hacker, Herculina S Kruger, Tumelo Seru, Mark D Faries, John R Speakman
OBJECTIVE: Assortative mating for adiposity increases the genetic burden on offspring, but its causes remain unclear. One hypothesis is that people who have high adiposity find other people with obesity more physically attractive than lean people. METHODS: The attractiveness of sets of images of males and females who varied in adiposity were rated by opposite sex subjects (559 males and 340 females) across 12 countries. RESULTS: There was tremendous individual variability in attractiveness ratings...
March 2018: Obesity
Philip T Leftwich, Naomi V E Clarke, Matthew I Hutchings, Tracey Chapman
No abstract text is available yet for this article.
February 20, 2018: Proceedings of the National Academy of Sciences of the United States of America
Makiko Kamijo, Mayuko Kawamura, Shoji Fukamachi
Colour vision is often essential for animals. Fine discrimination of colours enhances the ability of animals to find food, predators, or mating partners. Using two colour variants of medaka (Oryzias latipes), which mate assortatively depending on visual cues (pale grey versus dark orange), we recently established red colour-blind strains by knocking out the red opsin (long-wavelength-sensitive) genes and elucidated that the fish were indeed insensitive to red light. In the present study, we investigated the mate choice of these red-blind fish...
February 12, 2018: Behavioural Processes
Jonathan L Whitney, Brian W Bowen, Stephen A Karl
One of the primary challenges of evolutionary research is to identify ecological factors that favor reproductive isolation. Therefore, studying partially isolated taxa has the potential to provide novel insight into the mechanisms of evolutionary divergence. Our study utilizes an adaptive color polymorphism in the arc-eye hawkfish (Paracirrhites arcatus) to explore the evolution of reproductive barriers in the absence of geographic isolation. Dark and light morphs are ecologically partitioned into basaltic and coral microhabitats a few meters apart...
February 8, 2018: Molecular Ecology
Claudio S Quilodrán, Frédéric Austerlitz, Mathias Currat, Juan I Montoya-Burgos
The dispersal of non-native genes due to hybridization is a form of cryptic invasion with growing concern in evolution and conservation. This includes the spread of transgenic genes and antibiotic resistance. To investigate how genes and phenotypes are transmitted, we developed a general model that, for the first time, considers concurrently: multiple loci, quantitative and qualitative gene expression, assortative mating, dominance/recessivity inheritance and density-dependent demographic effects. Selection acting on alleles or genotypes can also be incorporated...
February 5, 2018: Scientific Reports
Orr Levy, Isak Nethanël Gath
We investigate the spread from ancestors to descendants, under a model of sexual reproduction, of hereditary elements distinguishing individuals from their fellow human beings. These hereditary elements, termed labels, are either symbolic, implying a socio-cultural or ethnic self-determined category, or biological, i.e. a DNA sequence (for example founder mutations). The impact of various modes of preferential (assortative) mating on the dissemination of a known ancestral label was studied for both kinds of labels, the symbolic and the biological...
January 27, 2018: Journal of Theoretical Biology
Zhen Qiao, Joseph E Powell, David M Evans
Disassortative mating refers to the phenomenon in which individuals with dissimilar genotypes and/or phenotypes mate with one another more frequently than would be expected by chance. Although the existence of disassortative mating is well established in plant and animal species, the only documented example of negative assortment in humans involves dissimilarity at the major histocompatibility complex (MHC) locus. Previous studies investigating mating patterns at the MHC have been hampered by limited sample size and contradictory findings...
January 22, 2018: Genes
Roger K Butlin, Carole M Smadja
During the process of speciation, populations may diverge for traits and at their underlying loci that contribute barriers to gene flow. These barrier traits and barrier loci underlie individual barrier effects, by which we mean the contribution that a barrier locus or trait-or some combination of barrier loci or traits-makes to overall isolation. The evolution of strong reproductive isolation typically requires the origin of multiple barrier effects. Critically, it also requires the coincidence of barrier effects; for example, two barrier effects, one due to assortative mating and the other due to hybrid inviability, create a stronger overall barrier to gene flow if they coincide than if they distinguish independent pairs of populations...
February 2018: American Naturalist
T K Lehtonen, K R Elmer, M Lappalainen, A Meyer
Fine-scaled genetic structuring, as seen for example in many lacustrine fish, typically relates to the patterns of migration, habitat use, mating system or other ecological factors. Because the same processes can also affect the propensity of population differentiation and divergence, assessments of species from rapidly speciating clades, or with particularly interesting ecological traits, can be especially insightful. For this study, we assessed the spatial genetic relationships, including the genetic evidence for sex-biased dispersal, in a colony-breeding cichlid fish, Amphilophus astorquii, endemic to Crater Lake Apoyo in Nicaragua, using 11 polymorphic microsatellite loci (n = 123 individuals from three colonies)...
January 18, 2018: Scientific Reports
Ana-Hermina Ghenu, Alexandre Blanckaert, Roger K Butlin, Jonna Kulmuni, Claudia Bank
In many diploid species the sex chromosomes play a special role in mediating reproductive isolation. In haplodiploids, where females are diploid and males haploid, the whole genome behaves similarly to the X/Z chromosomes of diploids. Therefore, haplodiploid systems can serve as a model for the role of sex chromosomes in speciation and hybridization. A previously described population of Finnish Formica wood ants displays genome-wide signs of ploidally and sexually antagonistic selection resulting from hybridization...
January 12, 2018: Molecular Ecology
Daniel Shane Wright, Emma Rietveld, Martine E Maan
Background: Efficient communication requires that signals are well transmitted and perceived in a given environment. Natural selection therefore drives the evolution of different signals in different environments. In addition, environmental heterogeneity at small spatial or temporal scales may favour phenotypic plasticity in signaling traits, as plasticity may allow rapid adjustment of signal expression to optimize transmission. In this study, we explore signal plasticity in the nuptial coloration of Lake Victoria cichlids, Pundamilia pundamilia and Pundamilia nyererei...
2018: PeerJ
Sheela P Turbek, Elizabeth S C Scordato, Rebecca J Safran
Seasonal journeys between breeding and non-breeding habitat are undertaken by a diverse array of animals. Parallel developments in tracking and genomic methods are enabling finer resolution of these movements and their role in the evolutionary process. Evidence from allopatric and co-occurring breeding populations indicates that variation in migratory behavior is often associated with genetic differentiation. While assortative mating and selection against hybrids due to divergent migratory phenotypes can contribute to reproductive isolation, the details of these mechanisms remain unclear...
March 2018: Trends in Ecology & Evolution
Michael Kopp, Maria R Servedio, Tamra C Mendelson, Rebecca J Safran, Rafael L Rodríguez, Mark E Hauber, Elizabeth C Scordato, Laurel B Symes, Christopher N Balakrishnan, David M Zonana, G Sander van Doorn
The large body of theory on speciation with gene flow has brought to light fundamental differences in the effects of two types of mating rules on speciation: preference/trait rules, in which divergence in both (female) preferences and (male) mating traits is necessary for assortment, and matching rules, in which individuals mate with like individuals on the basis of the presence of traits or alleles that they have in common. These rules can emerge from a variety of behavioral or other mechanisms in ways that are not always obvious...
January 2018: American Naturalist
Shaoxiong Ding, Mrinal Mishra, Haohao Wu, Shuang Liang, Michael M Miyamoto
The northwest Pacific marginal seas are a primary center of phylogeographic and evolutionary research, because of their dynamic geographic history of falling and rising sea levels during the glaciations and interglaciations of the last one million years. Here we present new molecular and morphological data for geographic samples of the four-eyed sleeper (Bostrychus sinensis), which reinforce the evidence for secondary contact and hybridization between two phylogeographic lineages in the East China Sea. Specifically, we find that the secondary contact region is characterized by a low frequency of hybridization, where mitochondrial DNA introgression is relatively common, whereas F1 hybrids are correspondingly scarce...
January 2018: Heredity
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