Increased competition for resources forces fellow citizens to become competitors and rivals, and the differences between them are exaggerated.
Competitor number typically individuals of the same sex is another important index of sexual selection, which can operate independently of population sex ratio (e.g., males in a population with an even sex ratio might still experience intense competition for resources because the density of male competitors, reflecting overall population density, is high).
In the Pacific, S. droebachiensis is embedded in a complex community that includes 2 4 congeners, some of which may act as competitors for resources.
The ecological community of fresh water stickleback is relatively simple, with no close heterospecific vertebrate competitors for resources (but see Gray et al. 2005).
Under conditions of high population density, species that overlap in their ecological niches may experience increased resource competition; thus, during these times infanticide could conceivably be used as a strategy to eliminate potential future competitors for resources or space.
The number of offspring produced by a female is determined by the number of competitors for resources within her home range (local density) and by the match between her visual properties and the environmental light color.
China has not yet confirmed the deal, but analysts said it was a potential boost to the junta and a setback to China's push to be seen as a responsible competitor for natural resources.
The U.S. has been closely watching Russia, America's main competitor for Arctic resources, but American officials also showed concern over Canada's potential territorial claim to the Arctic's Northwest passage.
In analysing the problem, the specific questions we raised were: (a) how would P. putida respond to the presence of another species, which might be a potential competitor for the resources?
According to resource-ratio theory, the species that survives at the lowest levels of a limiting resource will be the superior competitor for that resource [15], [51], indicating that invasive Dreissena could be successful in P-limited environments and become very effective at exploiting resources.
