Coevolutionary arms races: increased host immune defense promotes specialization by avian fleas.

abstract：:The evolutionary forces shaping within- and across-species variation in the investment in male and female sex function are still incompletely understood. Despite earlier suggestions that in plants the evolution or cosexuality vs. dioecy, as well as sex allocation among cosexuals, is affected by seed and pollen dispers...

journal_title：Journal of evolutionary biology

authors： Fromhage L,Kokko H

更新日期：2010-09-01 00:00:00

abstract：:Adaptation occurs by gene replacement (or transient balanced polymorphism). Replacement may be caused by selection (local or global) and/or genetic drift among alleles. In addition, historical events may blur the respective effects of selection and drift during the course of replacement. We address the relative import...

journal_title：Journal of evolutionary biology

authors： Labbe P,Lenormand T,Raymond M

更新日期：2005-11-01 00:00:00

abstract：:Hybridization and gene introgression can occur frequently between closely related taxa, but appear to be rare phenomena among members of the species-rich West Indian radiation of Anolis lizards. We investigated the pattern and possible mechanism of introgression between two sister species from Puerto Rico, Anolis pulc...

journal_title：Journal of evolutionary biology

authors： Jezkova T,Leal M,Rodríguez-Robles JA

更新日期：2013-07-01 00:00:00

abstract：:The ecological opportunities associated with transitions across the marine-freshwater interface are regarded as an important catalyst of diversification in a range of aquatic taxa. Here, we examined the role of these major habitat transitions and trophic diversification in a radiation of Australasian fishes using a ne...

journal_title：Journal of evolutionary biology

authors： Davis AM,Unmack PJ,Pusey BJ,Johnson JB,Pearson RG

更新日期：2012-06-01 00:00:00

abstract：:Theory predicts that lifespan will depend on the dietary intake of an individual, the allocation of resources towards reproduction and the costs imposed by the opposite sex. Although females typically bear the majority of the cost of offspring production, nuptial feeding invertebrates provide an ideal opportunity to e...

journal_title：Journal of evolutionary biology

authors： Hall MD,Bussière LF,Brooks R

更新日期：2009-04-01 00:00:00

abstract：:We studied genetic differentiation between two social forms (M-type: single queen, independent nest founding; P-type: multiple queens, dependent nest founding, building of colonial networks) of the ant Formica truncorum in a locality where the social types characterize two sympatric populations. The genetic results in...

journal_title：Journal of evolutionary biology

authors： Gyllenstrand N,Seppä P,Pamilo P

更新日期：2005-07-01 00:00:00

abstract：:In the wing dimorphic sand cricket, Gryllus firmus, there is a pronounced trade-off between flight capability and fecundity. This trade-off is found both between morphs and within the macropterous morph, in which fecundity is negatively correlated with the mass of the principle flight muscles, the dorso-longitudinal m...

journal_title：Journal of evolutionary biology

authors： Roff DA,Gélinas MB

更新日期：2003-01-01 00:00:00

abstract：:The reproductive mechanism, that is whether an organism outcrosses, selfs or asexually reproduces, has a substantial impact on the amount and pattern of genetic variation. In this study, we estimate genetic variation and genetic load for a predominately asexual population of Mimulus guttatus, and then compare our resu...

journal_title：Journal of evolutionary biology

authors： Marriage TN,Kelly JK

更新日期：2009-11-01 00:00:00

abstract：:Current understanding of sex chromosome evolution is largely dependent on species with highly degenerated, heteromorphic sex chromosomes, but by studying species with recently evolved or morphologically indistinct sex chromosomes we can greatly increase our understanding of sex chromosome origins, degeneration and tur...

journal_title：Journal of evolutionary biology

authors： Keating SE,Griffing AH,Nielsen SV,Scantlebury DP,Gamble T

更新日期：2020-09-01 00:00:00

abstract：:It has been hypothesized that in ancient apomictic, nonrecombining lineages the two alleles of a single copy gene will become highly divergent as a result of the independent accumulation of mutations (Meselson effect). We used a partial sequence of the elongation factor-1alpha (ef-1alpha) and the heat shock protein 82...

journal_title：Journal of evolutionary biology

authors： Schaefer I,Domes K,Heethoff M,Schneider K,Schön I,Norton RA,Scheu S,Maraun M

更新日期：2006-01-01 00:00:00

abstract：:Characterizing patterns of observed current variation, and testing hypotheses concerning the potential drivers of this variation, is fundamental to understanding how morphology evolves. Phylogenetic history, size and ecology are all central components driving the evolution of morphological variation, but only recently...

journal_title：Journal of evolutionary biology

authors： Openshaw GH,Keogh JS

更新日期：2014-02-01 00:00:00

abstract：:Evolutionary theory predicts that selection will favour sperm traits that maximize fertilization success in local fertilization environments. In externally fertilizing species, osmolality of the fertilization medium is known to play a critical role in activating sperm motility, but there remains limited evidence for a...

journal_title：Journal of evolutionary biology

authors： Byrne PG,Dunne C,Munn AJ,Silla AJ

更新日期：2015-03-01 00:00:00

abstract：:Sex allocation theory predicts females will adaptively manipulate sex ratios to maximize their progeny's reproductive value. Recently, the generality of biased sex allocation in birds has been questioned by meta-analytic reviews, which demonstrate that many previously reported significant results may simply reflect sa...

journal_title：Journal of evolutionary biology

authors： Dowling DK,Mulder RA

更新日期：2006-03-01 00:00:00

abstract：:Animals use acoustic signals to defend resources against rivals and attract breeding partners. As with many biological traits, acoustic signals may reflect ancestry; closely related species often produce more similar signals than do distantly related species. Whether this similarity in acoustic signals is biologically...

journal_title：Journal of evolutionary biology

authors： Sosa-López JR,Martínez Gómez JE,Mennill DJ

更新日期：2016-02-01 00:00:00

abstract：:Parasitism has been proposed as a factor in host speciation, as an agent affecting coexistence of host species in species-rich communities and as a driver of post-speciation diversification. Young adaptive radiations of closely related host species of varying ecological and genomic differentiation provide interesting ...

journal_title：Journal of evolutionary biology

authors： Karvonen A,Wagner CE,Selz OM,Seehausen O

更新日期：2018-09-01 00:00:00

abstract：:When two species come into contact and interbreed, the production of unfit hybrids can limit or prevent gene flow between the populations, thus maintaining each species' separate identity. The genetic basis of this hybrid dysfunction has recently begun to be elucidated, particularly for hybrid sterility and inviabilit...

journal_title：Journal of evolutionary biology

authors： Dickman CT,Moehring AJ

更新日期：2014-01-01 00:00:00

abstract：:The North Pacific Ocean has been of great significance to understanding biogeography and speciation in temperate faunas, including for two species of char (Salmonidae: Salvelinus) whose evolutionary relationship has been controversial. We examined the morphology and genetics (microsatellite and mitochondrial DNA) of A...

journal_title：Journal of evolutionary biology

authors： Taylor EB,Lowery E,Lilliestråle A,Elz A,Quinn TP

更新日期：2008-11-01 00:00:00

abstract：:Sexual differences are often dramatic and widespread across taxa. Their extravagance and ubiquity can be puzzling because the common underlying genome of males and females is expected to impede rather than foster phenotypic divergence. Widespread dimorphism, despite a shared genome, may be more readily explained by co...

journal_title：Journal of evolutionary biology

authors： Wyman MJ,Stinchcombe JR,Rowe L

更新日期：2013-10-01 00:00:00

abstract：:Positive correlations between heterozygosity and fitness traits are frequently observed, and it has been hypothesized, but rarely tested experimentally, that parasites play a key role in mediating the heterozygosity-fitness association. We evaluated this hypothesis in a wild great tit (Parus major) population by testi...

journal_title：Journal of evolutionary biology

authors： Voegeli B,Saladin V,Wegmann M,Richner H

更新日期：2012-03-01 00:00:00

abstract：:We explored the evolution of recombination under antagonistic coevolution, concentrating on the equilibrium frequencies of modifier alleles causing recombination in initially nonrecombining populations. We found that the equilibrium level of recombination in the host depended not only on parasite virulence, but also o...

journal_title：Journal of evolutionary biology

authors： Peters AD,Lively CM

更新日期：2007-05-01 00:00:00

abstract：:Social group size may affect the potential for sperm competition, and this in turn may favour ontogenetic adjustments in testicular mass according to the likely requirements for sperm and spermatophore production. In a number of comparative analyses of testis mass among vertebrate species that differ in mating system ...

journal_title：Journal of evolutionary biology

authors： Tan GN,Govedich FR,Burd M

更新日期：2004-05-01 00:00:00

abstract：:Mountain birch, Betula pubescens ssp. tortuosa, forms the treeline in northern Sweden. A recent shift in the range of the species associated with an elevation of the treeline is commonly attributed to climate warming. Using microsatellite markers, we explored the genetic structure of populations along an altitudinal g...

journal_title：Journal of evolutionary biology

authors： Truong C,Palmé AE,Felber F

更新日期：2007-01-01 00:00:00

abstract：:Sexual selection theory predicts that paternal quality should drive female investment in progeny. We tested whether polyandrous female side-blotched lizards, Uta stansburiana, would adjust within-clutch progeny investment according to sire phenotypes. In two different years, polyandrous females selectively used sperm ...

journal_title：Journal of evolutionary biology

authors： Calsbeek R,Sinervo B

更新日期：2004-03-01 00:00:00

abstract：:Most ectotherms follow a pattern of size plasticity known as the temperature-size rule where individuals reared in cold environments are larger at maturation than those reared in warm environments. This pattern seems maladaptive because growth is slower in the cold so it takes longer to reach a large size. However, it...

journal_title：Journal of evolutionary biology

authors： Arendt J

更新日期：2015-01-01 00:00:00

abstract：:Using supertree phylogenetic reconstructions, we investigate how livebearing and freshwater adaptations may have shaped evolutionary patterns in the Atherinomorpha, a large clade (approximately 1500 extant species) of ray-finned fishes. Based on maximum parsimony reconstructions, livebearing appears to have evolved at...

journal_title：Journal of evolutionary biology

authors： Mank JE,Avise JC

更新日期：2006-05-01 00:00:00

abstract：:Much of the variation among insects is derived from the different ways that chitin has been moulded to form rigid structures, both internal and external. In this study, we identify a highly conserved expression pattern in an insect-only gene family, the Osiris genes, that is essential for development, but also plays a...

journal_title：Journal of evolutionary biology

authors： Smith CR,Morandin C,Noureddine M,Pant S

更新日期：2018-04-01 00:00:00

abstract：:We investigated the effect of temperature and wing morphology on the quantitative genetic variances and covariances of five size-related traits in the sand cricket, Gryllus firmus. Micropterous and macropterous crickets were reared in the laboratory at 24, 28 and 32 degrees C. Quantitative genetic parameters were esti...

journal_title：Journal of evolutionary biology

authors： Bégin M,Roff DA,Debat V

更新日期：2004-11-01 00:00:00

abstract：:Traits of interest to evolutionary biologists often have complex genetic architectures, the nature of which can confound traditional experimental study at single levels of analysis. In the fire ant Solenopsis invicta, the presence of a Mendelian 'supergene' is both necessary and sufficient to induce a shift in a funda...

journal_title：Journal of evolutionary biology

authors： Trible W,Ross KG

更新日期：2016-03-01 00:00:00

abstract：:It has been suggested that polyandry allows females to increase offspring genetic diversity and reduce the prevalence and susceptibility of their offspring to infectious diseases. We tested this hypothesis in wild-derived house mice (Mus musculus) by experimentally infecting the offspring from 15 single- and 15 multip...

journal_title：Journal of evolutionary biology

authors： Thonhauser KE,Raveh S,Thoß M,Penn DJ

更新日期：2016-06-01 00:00:00

abstract：:Maternal inheritance of mitochondrial DNA (mtDNA) was originally thought to prevent any response to selection on male phenotypic variation attributable to mtDNA, resulting in a male-biased mtDNA mutation load ("mother's curse"). However, the theory underpinning this claim implicitly assumes that a male's mtDNA has no ...

journal_title：Journal of evolutionary biology

authors： Keaney TA,Wong HWS,Dowling DK,Jones TM,Holman L

更新日期：2020-02-01 00:00:00