نتایج جستجو برای: body trait

تعداد نتایج: 802658  

Journal: :Cell 2006
Sangyun Jeong Antonis Rokas Sean B. Carroll

Hox genes have been implicated in the evolution of many animal body patterns, but the molecular events underlying trait modification have not been elucidated. Pigmentation of the posterior male abdomen is a recently acquired trait in the Drosophila melanogaster lineage. Here, we show that the Abdominal-B (ABD-B) Hox protein directly activates expression of the yellow pigmentation gene in poster...

Journal: :Journal of evolutionary biology 2003
S Bedhomme P Agnew C Sidobre Y Michalakis

As the relationship between a given life-history trait and fitness is not necessarily the same for the two sexes, an 'intersexual ontogenetic conflict' may arise. We analysed the phenotypic reaction to intraspecific larval competition of the mosquito, Aedes aegypti, asking: (i) Do both sexes pay the cost of competition with the same life-history traits and are they equal competitors? (ii) Is th...

Journal: :Alcoholism, clinical and experimental research 2001
B Tabakoff A Helander K M Conigrave L Martinez P L Hoffman J Whitfield L Degenhardt J Saunders A Barón J Glanz

This article represents the proceedings of a symposium at the 2000 ISBRA Meeting in Yokohama, Japan. The chair was Boris Tabakoff. The presentations were (1) Overview of the WHO/ISBRA study on state and trait markers in alcoholism, by Boris Tabakoff; (2) Biochemical markers of acute and chronic drinking: Results of the WHO/ISBRA study, by Anders Helander; (3) The impact of country of recruitmen...

2014
Robby Stoks Aurora N Geerts Luc De Meester

We integrated the evidence for evolutionary and plastic trait changes in situ in response to climate change in freshwater invertebrates (aquatic insects and zooplankton). The synthesis on the trait changes in response to the expected reductions in hydroperiod and increases in salinity indicated little evidence for adaptive, plastic, and genetic trait changes and for local adaptation. With respe...

2015
Stephen P De Lisle Locke Rowe

Although a negative covariance between parasite load and sexually selected trait expression is a requirement of few sexual selection models, such a covariance may be a general result of life-history allocation trade-offs. If both allocation to sexually selected traits and to somatic maintenance (immunocompetence) are condition dependent, then in populations where individuals vary in condition, ...

Journal: :Evolution; international journal of organic evolution 2006
Olivier Gimenez Rita Covas Charles R Brown Mark D Anderson Mary Bomberger Brown Thomas Lenormand

Assessing natural selection on a phenotypic trait in wild populations is of primary importance for evolutionary ecologists. To cope with the imperfect detection of individuals inherent to monitoring in the wild, we develop a nonparametric method for evaluating the form of natural selection on a quantitative trait using mark-recapture data. Our approach uses penalized splines to achieve flexibil...

2014
Ronnie Jia Heather Jia

A considerable body of work on technology adoption and use has focused on two information technology-related user traits, i.e., personal innovativeness and computer playfulness. However, there has been little effort to ground this body of work in trait research in psychology and other disciplines. One rationale for the emphasis on domain-specific traits is that they are more explanatory of outc...

2013
Andrew D. Barton Andrew J. Pershing Elena Litchman Nicholas R. Record Kyle F. Edwards Zoe V. Finkel Thomas Kiørboe Ben A. Ward

Andrew D. Barton,* Andrew J. Pershing, Elena Litchman, Nicholas R. Record, Kyle F. Edwards, Zoe V. Finkel, Thomas Kiørboe, and Ben A. Ward Abstract Changes in marine plankton communities driven by environmental variability impact the marine food web and global biogeochemical cycles of carbon and other elements. To predict and assess these community shifts and their consequences, ecologists are ...

Journal: :Philosophical transactions of the Royal Society of London. Series B, Biological sciences 2012
Steven L Chown

Trait-based approaches have long been a feature of physiology and of ecology. While the latter fields drifted apart in the twentieth century, they are converging owing at least partly to growing similarities in their trait-based approaches, which have much to offer conservation biology. The convergence of spatially explicit approaches to understanding trait variation and its ecological implicat...

2017
L. Giménez G. Torres A. Pettersen M. T. Burrows A. Estevez S. R. Jenkins

In species with complex life cycles, laboratory studies have shown that variations in the traits of settling larvae can affect post-settlement survival and influence recruitment and benthic− pelagic coupling. However, we still know little about the magnitude and spatial scale of natural trait variation. We studied spatial variation in body size and nutritional reserves (carbon, nitrogen and lip...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید