Search results for "Environmental variation"

showing 3 items of 3 documents

Impact of host nutritional status on infection dynamics and parasite virulence in a bird-malaria system.

2014

10 pages; International audience; Host resources can drive the optimal parasite exploitation strategy by offering a good or a poor environment to pathogens. Hosts living in resource-rich habitats might offer a favourable environment to developing parasites because they provide a wealth of resources. However, hosts living in resource-rich habitats might afford a higher investment into costly immune defences providing an effective barrier against infection. Understanding how parasites can adapt to hosts living in habitats of different quality is a major challenge in the light of the current human-driven environmental changes. We studied the role of nutritional resources as a source of phenoty…

0106 biological sciencesPlasmodiumCanariesPopulationNutritional StatusParasitemiaBiologyParasitemia010603 evolutionary biology01 natural sciencesPlasmodium[SDV.MP.PRO]Life Sciences [q-bio]/Microbiology and Parasitology/Protistology03 medical and health sciencesenvironmental variationAvian malariamedicine[ SDV.EE.IEO ] Life Sciences [q-bio]/Ecology environment/SymbiosisAnimalsParasite hostingeducationEcology Evolution Behavior and Systematics030304 developmental biology2. Zero hunger0303 health scienceseducation.field_of_study[ SDE.BE ] Environmental Sciences/Biodiversity and EcologyEcologyHost (biology)Plasmodium relictum[ SDV.MP.PRO ] Life Sciences [q-bio]/Microbiology and Parasitology/Protistologymedicine.diseasebiology.organism_classificationAnimal Feedhost-parasite interactionPlasmodium relictumDietMalariaObligate parasitevirulencenutritionavian malariaAnimal Nutritional Physiological PhenomenaAnimal Science and Zoology[SDE.BE]Environmental Sciences/Biodiversity and Ecologypathogen[SDV.EE.IEO]Life Sciences [q-bio]/Ecology environment/Symbiosis
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GENETIC AND ENVIRONMENTAL VARIATION IN PERCEIVED EXERTION AND HEART RATE DURING BICYCLE ERGOMETER WORK

1977

The relative contributions of heredity and environment to the variance in heart rate (HR) and rating of perceived exertion (RPE) during the bicycle ergometer work were studied with 14 pairs of male (6 monozygous (MZ) and 8 dizygous (DZ)) and 22 pairs of female (8 MZ and 14 DZ) twins ranging in age from 11 to 20 years. The results showed for both sexes that no significant differences in the intrapair variances of HR and RPE could be observed between the MZ and DZ twin samples. Thus it was concluded that in contrast to several other parameters of the measurements of the physical work capacity HR and RPE are not influenced to any significant degree by the genetic factors.

Rating of perceived exertionGeographyPhysical workWork (physics)Heart rateOperations managementBicycle ergometerPerceived exertionEnvironmental variationDemography
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Data from: Impact of host nutritional status on infection dynamics and parasite virulence in a bird-malaria system

2013

1. Host resources can drive the optimal parasite exploitation strategy by offering a good or a poor environment to pathogens. Hosts living in resource-rich habitats might offer a favourable environment to developing parasites because they provide a wealth of resources. However, hosts living in resource-rich habitats might afford a higher investment into costly immune defences providing an effective barrier against infection. Understanding how parasites can adapt to hosts living in habitats of different quality is a major challenge in the light of the current human-driven environmental changes. 2. We studied the role of nutritional resources as a source of phenotypic variation in host exploi…

virulencemedicine and health carenutritionenvironmental variationPlasmodium relictumavian malariaLife SciencesMedicinehost-parasite interaction
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