abstract：:Maternal effects on progeny wing size and shape in a homozygous parthenogenetic strain of Drosophila mercatorum were investigated. The impact of external maternal factors (heat stress) and the impact of internal maternal factors (different maternal and grand maternal age) were studied. The offspring developed under id...

journal_title：Journal of evolutionary biology

authors： Andersen DH,Pertoldi C,Scali V,Loeschcke V

更新日期：2005-07-01 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：:How complex life cycles of parasites are maintained is still a fascinating and unresolved topic. Complex life cycles using three host species, free-living stages, asexual and sexual reproduction are widespread in parasitic helminths. For such life cycles, we propose here that maintaining a second intermediate host in ...

journal_title：Journal of evolutionary biology

authors： Rauch G,Kalbe M,Reusch TB

更新日期：2005-07-01 00:00:00

abstract：:An evolutionary conflict of interest exists between parents and their offspring over the partitioning of parental investment (PI) among siblings. When the direct fitness benefits to offspring of increased PI, outweigh the inclusive fitness costs from lost future sibling fitness, selection should favour the evolution o...

journal_title：Journal of evolutionary biology

authors： Long TA

更新日期：2005-05-01 00:00:00

abstract：:Theoretical models of the advantage of sexual reproduction typically assume that reproductive output is equal in sexual and parthenogenetic females. We tested this assumption by comparing fecundity between parthenogenetic and sexual races of gekkonid lizards in the Heteronotia binoei complex, collected across a 1200 k...

journal_title：Journal of evolutionary biology

authors： Kearney M,Shine R

更新日期：2005-05-01 00:00:00

abstract：:A repeated pattern of background colour matching in animals is an indication that pigmentation may be cryptic. Here, we examine the relationship between pigmentation of the freshwater isopod Asellus aquaticus and background darkness in 29 lakes, wetlands and ponds in Southern Sweden. The results show that Asellus pigm...

journal_title：Journal of evolutionary biology

authors： Hargeby A,Stoltz J,Johansson J

更新日期：2005-05-01 00:00:00

abstract：:The action of natural selection is expected to reduce the effective population size of a nonrecombining chromosome, and this is thought to be the chief factor leading to genetic degeneration of Y-chromosomes, which cease recombining during their evolution from ordinary chromosomes. Low effective population size of Y c...

journal_title：Journal of evolutionary biology

authors： Laporte V,Filatov DA,Kamau E,Charlesworth D

更新日期：2005-03-01 00:00:00

abstract：:The cost of adaptations may depend on environmental conditions. We consider how the fitness cost of resistance to the herbicide triazine in Amaranthus hybridus interacts with folivory from the beetle Disonycha glabrata. Triazine-resistant (TR) genotypes suffer a fitness cost because of a pleiotropic reduction in the l...

journal_title：Journal of evolutionary biology

authors： Gassmann AJ,Futuyma DJ

更新日期：2005-03-01 00:00:00

abstract：:We investigated the relationship between host defense and specialization by parasites in comparative analyses of bird fleas and T-cell mediated immune response of their avian hosts, showing that fleas with few main host species exploited hosts with weak or strong immune defenses, whereas flea species that parasitized ...

journal_title：Journal of evolutionary biology

authors： Møller AP,Christe P,Garamszegi LZ

更新日期：2005-01-01 00:00:00

abstract：:The Red Queen hypothesis predicts that sex should be more common in populations heavily infested with parasites, than in those without. This hypothesis was investigated in the aquatic snail Melanoides tuberculata, in which both sexual and parthenogenetic individuals exist in natural populations, and some populations a...

journal_title：Journal of evolutionary biology

authors： Ben-Ami F,Heller J

更新日期：2005-01-01 00:00:00

abstract：:The evolutionary mechanisms underlying the maintenance of invariant traits are poorly understood, partly because the lack of variance makes these mechanisms difficult to study. Although the number of cotyledons that plant species produce is highly canalized, populations of plants frequently contain individuals with ab...

journal_title：Journal of evolutionary biology

authors： Conner JK,Agrawal AA

更新日期：2005-01-01 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：:Females in species that produce broods of multiple offspring need to partition resources among simultaneously growing ova, embryos or neonates. In birds, the duration of growth of a single egg exceeds the ovulation interval, and when maternal resources are limited, a temporal overlap among several developing follicles...

journal_title：Journal of evolutionary biology

authors： Young RL,Badyaev AV

更新日期：2004-11-01 00:00:00

abstract：:Feeding specializations such as herbivory are an often cited example of convergent and adaptive evolution. However, some groups such as lizards appear constrained in the evolution of morphological specializations associated with specialized diets. Here we examine whether the inclusion of plant matter into the diet of ...

journal_title：Journal of evolutionary biology

authors： Herrel A,Vanhooydonck B,Van Damme R

更新日期：2004-09-01 00:00:00

abstract：:Certain types of asexual reproduction lead to loss of complementation, that is unmasking of recessive deleterious alleles. A theoretical measure of this loss is calculated for apomixis, automixis and endomitosis in the cases of diploidy and polyploidy. The effect of the consequent unmasking of deleterious recessive mu...

journal_title：Journal of evolutionary biology

authors： Archetti M

更新日期：2004-09-01 00:00:00

abstract：:Directional selection for plant traits associated with resistance to herbivory tends to eliminate genetic variation in such traits. On the other hand, balancing selection arising from trade-offs between resistance and growth or spatially variable selection acts against the elimination of genetic variation. We explore ...

journal_title：Journal of evolutionary biology

authors： Jormalainen V,Honkanen T

更新日期：2004-07-01 00:00:00

abstract：:Theoretical models predict that parasite relatedness affects the outcome of competition between parasites, and the evolution of parasite virulence. We examined whether parasite relatedness affects competition between parasitic plants (Cuscuta europaea) that share common host plants (Urtica dioica). We infected hosts w...

journal_title：Journal of evolutionary biology

authors： Puustinen S,Koskela T,Mutikainen P

更新日期：2004-07-01 00:00:00

abstract：:Androdioecy (mixtures of males and hermaphrodites) is a rare mating system in both plants and animals. Theory suggests that high levels of inbreeding depression can maintain males in androdioecious populations if hermaphrodites commonly self-fertilize. However, if inbreeding depression (delta) can be 'purged' from sel...

journal_title：Journal of evolutionary biology

authors： Weeks SC

更新日期：2004-05-01 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：:Ecological divergence can cause speciation if adaptive traits have pleiotropic effects on mate choice. In Heliconius butterflies, mimetic patterns play a role in mate detection between sister species, as well as signalling to predators. Here we show that male butterflies from four recently diverged parapatric populati...

journal_title：Journal of evolutionary biology

authors： Jiggins CD,Estrada C,Rodrigues A

更新日期：2004-05-01 00:00:00

abstract：:Phylogeny of the butterfly genera Araschnia, Mynes, Symbrenthia and Brensymthia (Lepidoptera: Nymphalidae: Nymphalini) is reconstructed, based on 140 morphological and ecological characters. The resulting tree shows that Araschnia is a sister group of the clade including Symbrenthia, Mynes and Brensymthia (Symbrenthia...

journal_title：Journal of evolutionary biology

authors： Fric Z,Konvicka M,Zrzavy J

更新日期：2004-03-01 00:00:00

abstract：:Bottlenose dolphins (Tursiops truncatus) have a world-wide distribution, and show morphotypic variation among regions. Distinctions between coastal and pelagic populations have been documented; however, regional patterns of differentiation had not been previously investigated in a wider geographic context. We analysed...

journal_title：Journal of evolutionary biology

authors： Natoli A,Peddemors VM,Hoelzel AR

更新日期：2004-03-01 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：:We examined, through allozyme electrophoresis, the genetic structure of populations of the acridid grasshopper Dichroplus pratensis from two chromosomal races (Northern and Southern) and their hybrid zone in Argentina. No fixed alleles for any particular race were found, although genetic differentiation among parental...

journal_title：Journal of evolutionary biology

authors： Chiappero MB,Parise C,Martí DA,Bidau CJ,Gardenal CN

更新日期：2004-01-01 00:00:00

abstract：:We study the form of the clines in a female mating preference and male display trait using simulations of a hybrid zone. Allopatric populations of two species are connected by demes in a stepping stone arrangement. Results show that reproductive character displacement (a pattern of increased prezygotic isolation in sy...

journal_title：Journal of evolutionary biology

authors： Lemmon AR,Smadja C,Kirkpatrick M

更新日期：2004-01-01 00:00:00

abstract：:In several communication systems that rely on social learning, such as bird song, and possibly human language, the range of signals that can be learned is limited by perceptual biases--predispositions--that are presumably based on genes. In this paper, we examine the coevolution of such genes with the culturally trans...

journal_title：Journal of evolutionary biology

authors： Lachlan RF,Feldman MW

更新日期：2003-11-01 00:00:00

abstract：:Some female pollinating fig wasps (foundresses) re-emerge from figs after oviposition/pollination. We investigated why this occurs in the mutualism between the gynodioecious Ficus montana and Liporrhopalum tentacularis. Re-emergence increased with foundress density in figs and some foundresses oviposited in two male f...

journal_title：Journal of evolutionary biology

authors： Moore JC,Dunn AM,Compton SG,Hatcher MJ

更新日期：2003-11-01 00:00:00

abstract：:When breeding, male moor frogs Rana arvalis develop a bright blue dorsal coloration which varies in intensity between males. We tested whether this colour acts as a potential signal of a male's genetic quality to female moor frogs by artificially crossing pairs of males differing in the extent of the blue coloration t...

journal_title：Journal of evolutionary biology

authors： Sheldon BC,Arponen H,Laurila A,Crochet PA,Merilä J

更新日期：2003-11-01 00:00:00

abstract：:In cooperative breeding vertebrates, indirect fitness benefits would be maximized by subordinates that accurately assess their relatedness to group offspring and preferentially help more closely related kin. In the Seychelles warbler (Acrocephalus sechellensis), we found a positive relationship between subordinate-nes...

journal_title：Journal of evolutionary biology

authors： Richardson DS,Burke T,Komdeurs J

更新日期：2003-09-01 00:00:00

abstract：:We examined the selective consequences of variation in behaviour and endocrine physiology in two female throat-colour morphs of the lizard, Uta stansburiana in the wild. Female morphs differed in home-range distribution patterns and corticosterone levels in relation to the density and frequency of their female neighbo...

journal_title：Journal of evolutionary biology

authors： Comendant T,Sinervo B,Svensson EI,Wingfield J

更新日期：2003-09-01 00:00:00

abstract：:We studied the correlations between offspring sex ratio, UV coloration and overwinter survival in a population of blue tits, breeding in Gotland, Sweden, over three consecutive breeding seasons. In 2 of 3 years, we found that females paired to males with relatively brighter UV-coloration produced a greater proportion ...

journal_title：Journal of evolutionary biology

authors： Griffith SC,Ornborg J,Russell AF,Andersson S,Sheldon BC

更新日期：2003-09-01 00:00:00

abstract：:Recent contributions from DNA sequences have revolutionized our concept of systematic relationships in angiosperms. However, parts of the angiosperm tree remain unclear. Previous studies have been based on coding or rDNA regions of relatively conserved genes. A phylogeny for basal angiosperms based on noncoding, fast-...

journal_title：Journal of evolutionary biology

authors： Borsch T,Hilu KW,Quandt D,Wilde V,Neinhuis C,Barthlott W

更新日期：2003-07-01 00:00:00

abstract：:We aimed at identifying the causal basis of previously shown interrelations between demographic and genetic colony structure, ecological factors and split sex ratios in the ant, Leptothorax nylanderi. Colony-level variation in sex allocation was only partly explained by annual fluctuations during eight study years and...

journal_title：Journal of evolutionary biology

authors： Foitzik S,Strätz M,Heinze J

更新日期：2003-07-01 00:00:00

abstract：:We investigated genetic variability and genetic correlations in early life-history traits of Crassostrea gigas. Larval survival, larval development rate, size at settlement and metamorphosis success were found to be substantially heritable, whereas larval growth rate and juvenile traits were not. We identified a stron...

journal_title：Journal of evolutionary biology

authors： Ernande B,Clobert J,McCombie H,Boudry P

更新日期：2003-05-01 00:00:00

abstract：:Environmental manipulations have consistently demonstrated a cost of reproduction in the capital-breeding seed beetle, Callosobruchus maculatus, as females deprived of seeds or mates lay fewer eggs and thereby increase their longevity. Yet fecundity and longevity tend to be positively correlated within populations, pe...

journal_title：Journal of evolutionary biology

authors： Messina FJ,Fry JD

更新日期：2003-05-01 00:00:00

abstract：:Sexual conflict has been proposed as a potential selective agent in the evolution of a variety of traits. Here, we present a simple model that investigates the initial conditions under which sex-linked and sex-limited harming alleles can invade a population. In this paper, we expand previous threshold models to study ...

journal_title：Journal of evolutionary biology

authors： Andrés JA,Morrow EH

更新日期：2003-03-01 00:00:00

abstract：:Plants possess a remarkable capacity to alter their phenotype in response to the highly heterogeneous light conditions they commonly encounter in natural environments. In the present study with the weedy annual plant Sinapis arvensis, we (a) tested for the adaptive value of phenotypic plasticity in morphological and l...

journal_title：Journal of evolutionary biology

authors： Steinger T,Roy BA,Stanton ML

更新日期：2003-03-01 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：:Sexually selected traits are limited by selection against those traits in other fitness components, such as survival. Thus, sexual selection favouring large size in males should be balanced by higher mortality of larger males. However, evidence from red-winged blackbirds (Agelaius phoeniceus) indicates that large male...

journal_title：Journal of evolutionary biology

authors： Kissner KJ,Weatherhead PJ,Francis CM

更新日期：2003-01-01 00:00:00

abstract：:The processes of island colonization and speciation are investigated through mtDNA studies on Canary Island beetles. The genus Nesotes (Coleoptera: Tenebrionidae) is represented by 19 endemic species on the Canary Islands, the majority of which are single island endemics. Nesotes conformis is the most widespread, occu...

journal_title：Journal of evolutionary biology

authors： Rees DJ,Emerson BC,Oromí P,Hewitt GM

更新日期：2001-01-08 00:00:00