scholarly journals EFFECTS OF POPULATION DENSITY AND TEMPERATURE CONDITION ON FITNESS IN DROSOPHILA MELANOGASTER

1976 ◽  
Vol 51 (1) ◽  
pp. 19-25 ◽  
Author(s):  
SEIDO OHNISHI
Keyword(s):  
Drosophila Melanogaster ◽  
Population Density

scholarly journals Larval Population Density Alters Adult Sleep in Wild-Type Drosophila melanogaster but Not in Amnesiac Mutant Flies

2014 ◽  
Vol 4 (3) ◽  
pp. 453-470 ◽  
Author(s):  
Michael Chi ◽  
Leslie Griffith ◽  
Christopher Vecsey
Keyword(s):  
Drosophila Melanogaster ◽  
Population Density ◽  
Wild Type ◽  
Larval Population

scholarly journals Increasing adult density compromises anti-bacterial defense in Drosophila melanogaster

2022 ◽  
Author(s):  
Paresh Nath Das ◽  
Aabeer Kumar Basu ◽  
Nagaraj Guru Prasad
Keyword(s):  
Immune Response ◽  
Drosophila Melanogaster ◽  
Immune System ◽  
Population Density ◽  
Post Infection ◽  
Physiological Stress ◽  
Pathogen Transmission ◽  
Adult Density ◽  
Density Dependent ◽  
Adult Drosophila

The density-dependent prophylaxis hypothesis predicts that risk of pathogen transmission increases with increase in population density, and in response to this, organisms mount a prophylactic immune response when exposed to high density. This prophylactic response is expected to help organisms improve their chances of survival when exposed to pathogens. Alternatively, organisms living at high densities can exhibit compromised defense against pathogens due to lack of resources and density associated physiological stress; the density stress hypothesis. We housed adult Drosophila melanogaster flies at different densities and measured the effect this has on their post-infection survival and resistance to starvation. We find that flies housed at higher densities show greater mortality after being infected with bacterial pathogens, while also exhibiting increased resistance to starvation. Our results are more in line with the density-stress hypothesis that postulates a compromised immune system when hosts are subjected to high densities.

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