Results 31 to 40 of about 585,774 (283)

Responses to Selection on Flight Behavior in a Migratory Population of Milkweed Bug (Oncopeltus fasciatus) [PDF]

Evolution, 1989
The nature of genetic variation and covariation influencing life-history traits has been the subject of an increasing number of theoretical and empirical studies (Steams, 1983; Arnold, 1987). Knowledge of the socalled "genetic structure" among traits is essential to understanding both the potential and constraints for phenotypic evolution in response ...
James O, Palmer, Hugh, Dingle
openaire   +2 more sources

Post-Spaceflight (STS-135) Mouse Splenocytes Demonstrate Altered Activation Properties and Surface Molecule Expression. [PDF]

PLoS ONE, 2015
Alterations in immune function have been documented during or post-spaceflight and in ground based models of microgravity. Identification of immune parameters that are dysregulated during spaceflight is an important step in mitigating crew health risks ...
Shen-An Hwang, Brian Crucian, Clarence Sams, Jeffrey K Actor   +3 more
doaj   +1 more source

American Exceptionalism: Population Trends and Flight Initiation Distances in Birds from Three Continents [PDF]

, 2014
Background All organisms may be affected by humans' increasing impact on Earth, but there are many potential drivers of population trends and the relative importance of each remains largely unknown. The causes of spatial patterns in population trends and
Blumstein, DT, Guay, P-J, Møller, AP, Samia, DSM, Weston, MA   +4 more
core   +3 more sources

Urban flight: understanding individual and population‐level responses of Nearctic–Neotropical migratory birds to urbanization [PDF]

Journal of Animal Ecology, 2007
1. Despite the fact that studies of urban ecology have become commonplace in the literature, ecologists still lack empirical evidence of the underlying mechanisms responsible for relationships between urbanization and animal community structure. In an effort to understand the processes that govern an apparent avoidance of urban landscapes by many ...
Amanda D, Rodewald, Daniel P, Shustack
openaire   +2 more sources

Enhanced flight performance by genetic manipulation of wing shape in Drosophila [PDF]

, 2016
Insect wing shapes are remarkably diverse and the combination of shape and kinematics determines both aerial capabilities and power requirements. However, the contribution of any specific morphological feature to performance is not known.
A Censi, A Hedenstrom, AH Brand, ALR Thomas, BF Menezes, CH Waddington, CP Ellington, CP Ellington, CP Ellington, CP Klingenberg, CP Klingenberg, D Lentink, DR Warrick, FT Muijres, G Dietzl, J Young, JH Marden, JH Marden, KE Weber, KG Götz, L Abouchar, LF Tammero, M Calleja, M Mronz, MH Dickinson, MH Dickinson, P Henningsson, RJ Bomphrey, RJ Bomphrey, SA Combes, SM Walker, SM Walker, SM Walker, SN Fry, SN Fry, SP Sane, SP Sane, T Weis-Fogh, V Debat, Y Benjamini, YL Zhang   +40 more
core   +2 more sources

Reduced flight-to-light behaviour of moth populations exposed to long-term urban light pollution [PDF]

Biology Letters, 2016
The globally increasing light pollution is a well-recognized threat to ecosystems, with negative effects on human, animal and plant wellbeing. The most well-known and widely documented consequence of light pollution is the generally fatal attraction of nocturnal insects to artificial light sources.
Florian Altermatt, Dieter Ebert
openaire   +3 more sources

Numerical characterization of astronaut CaOx renal stone incidence rates to quantify in-flight and post-flight relative risk

npj Microgravity, 2022
Changes in urine chemistry potentially alter the risk of renal stone formation in astronauts. Quantifying spaceflight renal stone incidence risk compared to pre-flight levels remains a significant challenge for assessing the appropriate vehicle, mission,
Debra A. Goodenow-Messman, Suleyman A. Gokoglu, Mohammad Kassemi, Jerry G. Myers   +3 more
doaj   +1 more source

Effect of density-dependent individual movement on emerging spatial population distribution: Brownian motion vs Levy flights [PDF]

Journal of Theoretical Biology, 2019
Individual animal movement has been a focus of intense research and considerable controversy over the last two decades, however the understanding of wider ecological implications of various movement behaviours is lacking. In this paper, we consider this issue in the context of pattern formation. Using an individual-based modelling approach and computer
John Ellis, Natalia Petrovskaya, Sergei Petrovskii   +2 more
openaire   +4 more sources

Are flight staffs at higher risk for breast cancer? [PDF]

فصلنامه ابن سینا, 2017
Background: Several studies have shown that there is an increased risk of breast cancer among flight attendants. However, the results of epidemiological studies have not been consistent with this issue.
K Ziyari, O Rahmani, R Eslami
doaj  

Associations between respiratory illnesses and secondhand smoke exposure in flight attendants: A cross-sectional analysis of the Flight Attendant Medical Research Institute Survey

Environmental Health, 2011
Background Secondhand tobacco smoke (SHS) is associated with increased risk of respiratory illness, cancer, and cardiovascular disease. Prior to smoking bans on airlines in the late 1980s, flight attendants were exposed to a significant amount of SHS. In
Redberg Rita F, Haight Thaddeus J, Beatty Alexis L   +2 more
doaj   +1 more source