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On the adaptive significance of stress-induced immunosuppression
- L. Råberg, M. Grahn, D. Hasselquist, E. Svensson
- Biology, MedicineProceedings of the Royal Society of London…
- 7 September 1998
It is hypothesized that the risk of autoimmune responses increases during heavy physical workload and that the immune system is suppressed to counteract this, and suggested that considerable amounts of energy or nutrients can be saved by suppressing theimmune system.
Energetic stress, immunosuppression and the costs of an antibody response
It is concluded that the data provide some support to the idea that there may be a trade-off between immunocompetence and energetically costly activities such as thermoregulation, reproduction or mate attraction, although thisTrade-off may not necessarily be based on energy or nutrient limitation.
The impact of learning on sexual selection and speciation.
- M. Verzijden, C. ten Cate, M. Servedio, G. Kozak, J. Boughman, E. Svensson
- Biology, MedicineTrends in ecology & evolution
- 1 September 2012
It is pointed out that the context of learning, namely how and when learning takes place, often makes a crucial difference to the predicted evolutionary outcome.
Density cycles and an offspring quantity and quality game driven by natural selection
The first example of a genetic r versus K selection game that promotes stable population cycles in lizards is reported, and intrinsic causes of frequency- and density-dependent selection promotes an evolutionary game with two-generation oscillations.
Monitoring of behavioral patterns of aquatic organisms with an impedance conversion technique
An impedance converter, based on the tetrapole electrode system, proved to be sensitive for different kinds of behavior, e.g., ventilation, grazing, filter feeding, net spinning, and locomotion (swimming, creeping, and looping), which makes it a promising tool for continuous biomonitoring purposes.
Correlational selection and the evolution of genomic architecture
It is argued that frequency-dependent biotic interactions that have ‘Red Queen dynamics’ (eg, host-parasite interactions, predator-prey relationships or intraspecific arms races) often fuel chronic correlational selection, which is strong enough to maintain adaptive genetic correlations of the kind the authors describe.
Female Polymorphism, Frequency Dependence, and Rapid Evolutionary Dynamics in Natural Populations
It is shown that in a color‐polymorphic damselfly species, male‐female mating interactions lead to rapid evolutionary change in morph frequencies between generations, which contrast with the traditional view of how sexual conflict enhances the rate of population divergence.
Gender Differences in Species Recognition and the Evolution of Asymmetric Sexual Isolation
- E. Svensson, K. Karlsson, M. Friberg, F. Eroukhmanoff
- Biology, MedicineCurrent Biology
- 20 November 2007
Investigating gender and species differences in sexual isolation in a sympatric species pair of Calopteryx damselflies revealed that sexual isolation results from both female and male mate discrimination and that wing melanization functions as a species recognition character.
Precipitation drives global variation in natural selection
- A. Siepielski, M. Morrissey, +17 authors A. MacColl
- Medicine, Environmental ScienceScience
- 3 March 2017
It is reported that aspects of precipitation and potential evapotranspiration, along with the North Atlantic Oscillation, predicted variation in selection across plant and animal populations throughout many terrestrial biomes, whereas temperature explained little variation.
Sexual selection in complex environments.
It is suggested that deeper ecological perspectives on sexual selection may alter some of the fundamental assumptions of sexual selection theory and rapidly lead to new discoveries.