Misconceptions about the comparison of intrinsic rates
of natural increase.
The intrinsic rate
of increase (r) Treatments Female life table Two-sex life table Control 0.080 [+ or -] 0.007 0.076 [+ or -] 0.006 Pymetrozin 0.045 [+ or -] 0.017 0.036 [+ or -] 0.004 Neemarin 0.041 [+ or -] 0.009 0.046 [+ or -] 0.004 T.
Using demographic models to determine intrinsic rate
of increase and sustainable fishing for elasmobranchs: pitfalls, advances, and applications.
For the deterministic models, we explored the occurrence of long-term cycles by plotting regions of values of the intrinsic rates
of increase [r.sub.y] and [r.sub.z] that produce tori [ILLUSTRATION FOR FIGURE 2 OMITTED].
Most importantly, again the intrinsic rate
of increase was not statistically significant for any of the traits in either treatment (P [greater than] 0.11) and five of the six coefficients were positive, opposite that expected if a cost existed.
Nitrogen affected the intrinsic rate
of increase ([r.sub.m]), finite rate of increase ([lambda]), doubling time (DT), and generation time ([T.sub.G]) of M.
For each plant, Md and d were calculated, using the method of (Birch 1948) rm = 0.738 (log e Md) / d, the mean intrinsic rate
of increase (rm) for each plant was calculated, where Md is the total number of progeny produced by [P1] the mother of F1, (d) is the time taken by F1 aphid from its birth till the production of its 1st offspring.
Consequently, the intrinsic rate
(r) of Hp diet (0.11 [days.sup.-1]) was lower than from the other diets (Table 1; Figure 1).
The population had a weekly increase of 46% [finite rate of increase ([lambda]) = 5.46], and the intrinsic rate
of increase (rm) was 1.69.
The value of intrinsic rate
of natural increase ([r.sub.m]) was 0.0795[+ or -]0.004, 0.0919[+ or -]0.001, 0.0683[+ or -]0.006 and 0.0791[+ or -]0.004 on chickpea, cowpea, lentil and green gram, respectively.
Number of significant second-order models per 1000 time-series simulations for the Ricker model under 18 combinations of the parameters, r and [Psi], using two analyses (r = the intrinsic rate
of population increase; [Psi] = the autoregressive parameter of the exogenous factor).
Based on these data, the intrinsic rate
of natural increase ([r.sub.m]), was calculated by iteratively solving the equation (Birch 1948):