Publisher: John Wiley & Sons Inc
E-ISSN: 1939-9170|49|3|555-556
ISSN: 0012-9658
Source: Ecology, Vol.49, Iss.3, 1968-05, pp. : 555-556
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
Andrewartha (1963) and Watt (1964) state that the correlation of the ratios of successive population densities (Nt+1/Nt) with initial densities (Nt) will show a negative correlation in the absence of true density dependent mortality and fecundity because Nt+1/Nt and Nt are not independent variables. For the common situation where population densities after successive time intervals are not independent of initial densities, this correlation would in fact be zero, and, in addition, the use of random numbers as a model for the null hypothesis of density dependence is not valid.
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