journal
MENU ▼
Read by QxMD icon Read
search

Journal of Evolutionary Biology

journal
https://www.readbyqxmd.com/read/28430382/mixed-evidence-for-the-erosion-of-inter-tactical-genetic-correlations-through-intralocus-tactical-conflict
#1
Kyana N Pike, Joseph L Tomkins, Bruno A Buzatto
Alternative reproductive tactics, whereby members of the same sex use different tactics to secure matings are often associated with conditional intrasexual dimorphisms. Given the different selective pressures on males adopting each mating tactic,, intrasexual dimorphism is more likely to arise if phenotypes are genetically uncoupled and free to evolve towards their phenotypic optima. However, in this context, genetic correlations between male morphs could result in intralocus tactical conflict. We investigated the genetic architecture of male dimorphism in bulb mites (Rhizoglyphus echinopus) and earwigs (Forficula auricularia)...
April 21, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28425174/costs-and-benefits-of-sub-lethal-drosophila-c-virus-infection
#2
Vanika Gupta, Charlotte Stewart, Samuel S C Rund, Katy Monteith, Pedro F Vale
Viruses are major evolutionary drivers of insect immune systems. Much of our knowledge of insect immune responses derives from experimental infections using the fruit fly Drosophila melanogaster. Most experiments, however, employ lethal pathogen doses through septic injury, frequently overwhelming host physiology. While this approach has revealed several immune mechanisms, it is less informative about the fitness costs hosts may experience during infection in the wild. Using both systemic and oral infection routes we find that even apparently benign, sub-lethal infections with the horizontally transmitted Drosophila C Virus (DCV) can cause significant physiological and behavioral morbidity that is relevant for host fitness...
April 20, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28425158/sexual-colouration-and-sperm-performance-in-the-australian-painted-dragon-lizard-ctenophorus-pictus
#3
Callum S McDiarmid, Christopher R Friesen, Cissy Ballen, Mats Olsson
Theory predicts trade-offs between pre- and postcopulatory sexually selected traits. This relationship may be mediated by the degree to which males are able to monopolise access to females, as this will place an upper limit on the strength of postcopulatory selection. Furthermore, traits that aid in mate monopolization may be costly to maintain and may limit investment in postcopulatory traits, such as sperm performance. Australian painted dragons are polymorphic for the presence or absence of a yellow gular patch ('bibs'), which may aid them to monopolise access to females...
April 20, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28425157/geographic-variation-in-mimetic-precision-among-different-species-of-coral-snake-mimics
#4
Christopher K Akcali, David W Pfennig
Batesian mimicry is widespread, but whether and why different species of mimics vary geographically in resemblance to their model is unclear. We characterized geographic variation in mimetic precision among four Batesian mimics of coral snakes. Each mimic occurs where its model is abundant (i.e., in "deep sympatry"), rare (i.e., at the sympatry/allopatry boundary or "edge sympatry"), and absent (i.e., in allopatry). Geographic variation in mimetic precision was qualitatively different among these mimics. In one mimic, the most precise individuals occurred in edge sympatry; in another, they occurred in deep sympatry; in the third, they occurred in allopatry; and in the fourth, precise mimics were not concentrated anywhere throughout their range...
April 20, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28425150/genetic-basis-for-soma-is-present-in-undifferentiated-volvocine-green-algae
#5
Zachariah I Grochau-Wright, Erik R Hanschen, Patrick J Ferris, Takashi Hamaji, Hisayoshi Nozaki, Bradley J S C Olson, Richard E Michod
Somatic cellular differentiation plays a critical role in the transition from unicellular to multicellular life, but the evolution of its genetic basis remains poorly understood. By definition somatic cells do not reproduce to pass on genes and so constitute an extreme form of altruistic behavior. The volvocine green algae provide an excellent model system to study the evolution of multicellularity and somatic differentiation. In Volvox carteri, somatic cell differentiation is controlled by the regA gene, which is part of a tandem duplication of genes known as the reg cluster...
April 20, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28425140/response-of-parasitoid-egg-load-to-host-dynamics-and-implications-for-egg-load-evolution
#6
Craig B Phillips, John M Kean
A theoretical debate about whether parasitoids should be time- or egg-limited now recognises both as feasible, and interest has turned to determining the circumstances under which each might arise in the field, and their implications for parasitoid behaviour and evolution. Egg loads of parasitoids sampled from the field are predicted to show a negative response to host availability, but empirical support for this relationship is scarce. We measured how a parasitoid's egg load responded to seasonal fluctuations in host population density and recorded the predicted correlation...
April 20, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28419678/secondary-compounds-from-exotic-tree-plantations-change-female-mating-preferences-in-the-palmate-newt-lissotriton-helveticus
#7
Maider Iglesias-Carrasco, Megan L Head, Michael D Jennions, Carlos Cabido
Selection can favor phenotypic plasticity in mate choice in response to environmental factors that alter the costs and benefits of being choosy, or of choosing specific mates. Human-induced environmental change could alter sexual selection by affecting the costs of mate choice, or by impairing the ability of individuals to identify preferred mates. For example, variation in mate choice could be driven by environmentally induced differences in body condition (e.g. health) that change the cost of choosiness, or by environmental effects on the ability to detect or discriminate sexual signals...
April 17, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28402000/x-chromosome-drive-in-a-widespread-palearctic-woodland-fly-drosophila-testacea
#8
Graeme L Keais, Mark A Hanson, Brent E Gowen, Steve J Perlman
Selfish genes that bias their own transmission during meiosis can spread rapidly in populations, even if they contribute negatively to the fitness of their host. Driving X chromosomes provide a clear example of this type of selfish propagation. These chromosomes have important evolutionary and ecological consequences, and can be found in a broad range of taxa including plants, mammals, and insects. Here we report a new case of X chromosome drive (X drive) in a widespread woodland fly, Drosophila testacea. We show that males carrying the driving X (SR males) sire 80-100% female offspring, and possess a diagnostic X chromosome haplotype that is perfectly associated with the sex ratio distortion phenotype...
April 12, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28393424/a-comparative-analysis-of-experimental-selection-on-the-stickleback-pelvis
#9
Sara E Miller, Mirjam Barrueto, Dolph Schluter
Mechanisms of natural selection can be identified using experimental approaches. However, such experiments often yield non-significant effects and imprecise estimates of selection due to low power and small sample sizes. Combining results from multiple experimental studies might produce an aggregate estimate of selection that is more revealing than individual studies. For example, bony pelvic armor varies conspicuously among stickleback populations, and predation by vertebrate and insect predators has been hypothesized to be the main driver of this variation...
April 9, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28391616/variation-in-the-post-mating-fitness-landscape-in-fruitflies
#10
Claudia Fricke, Tracey Chapman
Sperm competition is pervasive and fundamental to determining a male's overall fitness. Sperm traits and seminal fluid proteins (Sfps) are key factors. However, studies of sperm competition may often exclude females that fail to remate during a defined period. Hence, the resulting datasets contain fewer data from the potentially fittest males that have most success in preventing female remating. It is also important to consider a male's reproductive success before entering sperm competition, which is a major contributor to fitness...
April 9, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28387971/fitness-effects-of-mutation-testing-genetic-redundancy-in-arabidopsis-thaliana
#11
Matthew T Rutter, Yana M Wieckowski, Courtney J Murren, Allan E Strand
Screens of organisms with disruptive mutations in a single gene often fail to detect phenotypic consequences for the majority of mutants. One explanation for this phenomenon is that the presence of paralogous loci provides genetic redundancy. However, it is also possible that the assayed traits are affected by few loci, that effects could be subtle, or that phenotypic effects are restricted to certain environments. We assayed a set of T-DNA insertion mutant lines of Arabidopsis thaliana to determine the frequency with which mutation affected fitness-related phenotypes...
April 7, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28387056/effects-of-ovarian-fluid-and-genetic-differences-on-sperm-performance-and-fertilization-success-of-alternative-reproductive-tactics-in-chinook-salmon
#12
Sarah J Lehnert, Ian A E ButtS, Erin W Flannery, Kia M Peters, Daniel D Heath, Trevor E Pitcher
In many species, sperm velocity affects variation in the outcome of male competitive fertilization success. In fishes, ovarian fluid (OF) released with the eggs can increase male sperm velocity and potentially facilitate cryptic female choice for males of specific phenotypes and/or genotypes. Therefore, to investigate the role of OF on fertilization success, we measured sperm velocity and conducted in vitro competitive fertilizations with paired Chinook salmon (Oncorhynchus tshawytscha) males representing two alternative reproductive tactics, jacks (small sneaker males) and hooknoses (large guarding males), in the presence of river water alone and OF mixed with river water...
April 7, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28386961/adult-dietary-protein-has-age-and-context-dependent-effects-on-male-post-copulatory-performance
#13
Erin L Macartney, Angela J Crean, Russell Bonduriansky
The highly-conserved effect of dietary protein restriction on life-span and ageing is observed in both sexes and across a vast range of taxa. This extension of life-span is frequently accompanied by a reduction in female fecundity and it has been hypothesised that individuals may reallocate resources away from reproduction and into somatic maintenance. However, effects of dietary protein restriction on male reproduction are less consistent, suggesting that these effects may depend on other environmental parameters...
April 7, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28386940/morphological-constraints-on-changing-avian-migration-phenology
#14
Anders Pape Møller, Diego Rubolini, Nicola Saino
Many organisms at northern latitudes have responded to climate warming by advancing their spring phenology. Birds are known to show earlier timing of spring migration and reproduction in response to warmer springs. However, species show heterogeneous phenological responses to climate warming, with those that have not advanced or have delayed migration phenology experiencing population declines. Although some traits (such as migration distance) partly explain heterogeneity in phenological responses, the factors affecting interspecies differences in the responsiveness to climate warming have yet to be fully explored...
April 7, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28386918/does-increased-heat-resistance-result-in-higher-susceptibility-to-predation-a-test-using-drosophila-melanogaster-selection-and-hardening
#15
Sandra Hangartner, Ian Dworkin, Michael DeNieu, Ary A Hoffmann
Heat resistance of ectotherms can be increased both by plasticity and evolution, but these effects may have trade-offs resulting from biotic interactions. Here we test for predation costs in Drosophila melanogaster populations with altered heat resistance produced by adult hardening and directional selection for increased heat resistance. In addition, we also tested for genetic trade-offs by testing heat resistance in lines that have evolved under increased predation risk. We show that while 35/37°C hardening increases heat resistance as expected, it does not increase predation risk from jumping spiders or mantids; in fact there was an indication that survival may have increased under predation following a triple 37°C compared to a single 35°C hardening treatment...
April 7, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28379613/signals-of-selection-in-conditionally-expressed-genes-in-the-diversification-of-three-horned-beetle-species
#16
Melissa H Pespeni, Jason T Ladner, Armin P Moczek
Species radiations may be facilitated by phenotypic differentiation already present within populations, such as those arising through sex-specific development or developmental processes biased toward particular reproductive or trophic morphs. We sought to test this hypothesis by utilizing a comparative transcriptomic approach to contrast among and within-species differentiation using three horned beetle species in the genus Onthophagus. These three species exhibit differences along three phenotypic axes reflective of much of the interspecific diversity present within the genus: horn location, polarity of sexual dimorphism, and degree of nutritional sensitivity...
April 5, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28374957/the-evolution-of-strategic-male-mating-effort-in-an-information-transfer-framework
#17
Leif Engqvist, Michael Taborsky
Sperm competition theory predicts that males should use cues indicating the risk and intensity of sperm competition to tailor their sperm investment accordingly. Rival males are an important source of social information regarding sperm competition risk. However, revealing such information may not be in the rival males' interest. Here we use a theoretical approach based on informed and uninformed games to investigate when information transfer about sperm competition risk to competitors is beneficial for a male, and when it is not...
April 4, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28374928/evolution-of-virulence-under-intensive-farming-salmon-lice-increase-skin-lesions-and-reduce-host-growth-in-salmon-farms
#18
Mathias Stølen Ugelvik, Arne Skorping, Olav Moberg, Adèle Mennerat
Parasites rely on resources from a host and are selected to achieve an optimal combination of transmission and virulence. Human-induced changes in parasite ecology, such as intensive farming of hosts, might not only favor increased parasite abundances, but also alter the selection acting on parasites and lead to life history evolution. The trade-off between transmission and virulence could be affected by intensive farming practices such as high host density and the use of anti-parasitic drugs, which might lead to increased virulence in some host-parasite systems...
April 4, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28370951/multivariate-genetic-architecture-of-the-anolis-dewlap-reveals-both-shared-and-sex-specific-features-of-a-sexually-dimorphic-ornament
#19
Robert M Cox, Robin A Costello, Benjamin E Camber, Joel W McGlothlin
Darwin viewed the ornamentation of females as an indirect consequence of sexual selection on males and the transmission of male phenotypes to females via the "laws of inheritance." Although a number of studies have supported this view by demonstrating substantial between-sex genetic covariance for ornament expression, the majority of this work has focused on avian plumage. Moreover, few studies have considered the genetic basis of ornaments from a multivariate perspective, which may be crucial for understanding the evolution of sex differences in general, and of complex ornaments in particular...
March 31, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28370602/habitat-related-variation-in-the-plasticity-of-a-uv-sensitive-photoreceptor-over-a-small-spatial-scale-in-the-palmate-newt
#20
Jean Secondi, Mélissa Martin, Delphine Goven, Pascal Mège, Stéphane Sourice, Marc Théry
Plastic phenotypes are expected to be favoured in heterogeneous environments compared with stable environments. Sensory systems are interesting to test this theory because they are costly to produce and support, and strong fitness costs are expected if they are not tuned to the local environment. Consistently, the visual system of several species changes with the conditions experienced during early development. However, there is little information on whether the amplitude of the change, i.e. the reaction norm, differs between visual environments...
March 31, 2017: Journal of Evolutionary Biology
journal
journal
29938
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"