DEMP 1.5.4


vs. 2014/08/07   ( History )


a php program to calculate demographic parameters (life table)

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© 2008-2014 / pgiordanengo (a) sophia.inra.fr               Institut Sophia Agrobiotech - ID team"

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type the email address where calculated parameters will be sent:

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 ● Calculated life table parameters of the populations are:
     - age-specific survival (lx)
     - age-specific fecundity (mx)
     - intrinsic rate of increase obtained with the Lotka equation (Birch, 1948)
          (rm, Σ e-rmx lx mx = 1)
     - finite rate of increase (λ = erm)
     - doubling time (DeLoach, 1974) (DT = ln 2/rm)

 ● DEMP uses a .csv or .xls file* (see the pattern: screenshot)
     and returns a multisheet .xls file:
     - sheet 1: larval survival rates
     - sheet 2: demographic variables of the population (PRP, DF, OP, ADS, LONG, Rm, lambda, DT)
     * Caution ! .csv or .xls data file limitations:
               110 individuals (=lines) max for 3 experimental classes max !


 ● Data to fill on line :
     - sex ratio:
       (number of females / number of males; 1 = parthenogenetic population)
     - sampling frequency:
       (for a sampling every 2 or 3 days the file table contains the data measured on the sampling day)
     - file name to upload

 ● Variables list:

     PRP    : pre-reproductive period(days)
     DF     : daily fecundity (larvae/female/day)
     OP     : oviposition period (days)
     ADS    : adult survival (days)
     LONG   : whole longevity (days)
     Rm     : intrinsic rate of natural increase (female/female/day)
     lambda : finite rate of increase (female/female/day)
     DT     : doubling time (days)

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