biostudies-literatureKnouft JHDivision of Environmental Biology160093https://www.ebi.ac.uk/biostudies/studies/S-EPMC4929904biostudies-literatureUnknown3(6)Identifying factors regulating variation in numbers of individuals among populations across a species' distribution is a fundamental goal in ecology. A common prediction, often referred to as the abundant-centre hypothesis, suggests that abundance is highest near the centre of a species' range. However, because of the primary focus on the geographical position of a population, this framework provides little insight into the environmental factors regulating local abundance. While range-wide variation in population abundance associated with environmental conditions has been investigated in terrestrial species, the relationship between climate and local abundance in freshwater taxa across species' distributions is not well understood. We used GIS-based temperature and precipitation data to deRoyal Society open scienceClimate and local abundance in freshwater fishes.PMC49299040844644Anthony MMKnouft JHfalseClimate and local abundance in freshwater fishes.Identifying factors regulating variation in numbers of individuals among populations across a species' distribution is a fundamental goal in ecology. A common prediction, often referred to as the abundant-centre hypothesis, suggests that abundance is highest near the centre of a species' range. However, because of the primary focus on the geographical position of a population, this framework provides little insight into the environmental factors regulating local abundance. While range-wide variation in population abundance associated with environmental conditions has been investigated in terrestrial species, the relationship between climate and local abundance in freshwater taxa across species' distributions is not well understood. We used GIS-based temperature and precipitation data to de2016-01-01T00:00:00Z2016 Jun2026-05-29T20:34:54.17Z2019-03-27T02:17:21ZS-EPMC49299042742976910.1098/rsos.160093