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. 2003 May 9;72(3):468–477. doi: 10.1046/j.1365-2656.2003.00716.x

Table 2.

Measured occupancy (number of fruit occupied), abundance (N; % relative abundance) and mean abundance per fruit (± SD) for each species in the assemblage (Dsim =Drosophila simulans; Zap1 =Zaprionus morphospecies group 1; Dmel =D. melanogaster; Zap2 =Zaprionus morphospecies group 2; Dbuzz =D. buzzatii; Dbusck =D. busckii). Predicted abundance using (a) the original method of He & Gaston (2000a) to solve for abundance and k HG simultaneously, (b) predicted HG k adj abundance†, and (c) predicted HG k NBD abundance‡ for three minimum mapping units (MMUs). Dashes indicate either no convergence at a solution for abundance and k, or abundances were not predicted for these species (see text). Values in parentheses indicate results of χ2 analyses for the differences between real and predicted abundances in the following order: d.f.; χ2‐value; significance level. ***P < 0·001

Species MMU pair Measured occup. N (%) Mean N (± SD) (a) Predicted HG k HG abundance
0·04 m2; 0·16 m2
(2; 2531·86; ***) 0·04 m2; 0·36 m2
(1; 2542·75; ***) 0·16 m2; 0·36 m2
(1; 2586·52; ***)
Dsim 102 2869 
(96·50) 13·28 ± 33·51  184·04  177·87     153·36
Zap1  21   56 
(1·8)  0·28 ± 1·06   23·46   23·83      26·01
Dmel  17   24 
(0·80)  0·11 ± 0·43      –      –         –
Zap2   8   10 
(0·34)  0·05 ± 0·25    8·40      –
Dbuzz   1    9 
(0·30)  0·04 ± 0·61      –      –         –
Dbusck   2    2 
(< 0·001)  0·01 ± 0·10      –      –         –
MMU (b) Predicted HG k adj abundance†
0·04 m2
(5; 2287·52; ***) 0·16 m2
(5; 35147·98; ***) 0·36 m2
(5; 11665 × 107; ***)
Dsim 102 2869 13·28 ± 33·51  316·06  902·07    3239·60
Zap1  21   56  0·28 ± 1·06   44·99  352·47    4262·51
Dmel  17   24  0·11 ± 0·43   36·42  902·91 1673229·00
Zap2   8   10  0·05 ± 0·25   11·33   29·37     442·73
Dbuzz   1    9  0·04 ± 0·61    1·04    2·81       4·59
Dbusck   2    2  0·01 ± 0·10    1·80    0·81       0·64
MMU (c) Predicted HG k NBD abundance‡
0·04 m2
(3; 0·38; ns) 0·16 m2
(3; 1469 × 105; ***) 0·36 m2
(3; 103113 × 108; ***)
Dsim 102 2869 13·28 ± 33·51 2874·27    6·52 × 105       1·72 × 108
Zap1  21   56  0·28 ± 1·06   60·54 1336·64   54256·75
Dmel  17   24  0·11 ± 0·43   23·90   82·42    1561·03
Zap2   8   10  0·05 ± 0·25    9·96   16·67      79·12
Dbuzz   1    9  0·04 ± 0·61      –      –         –
Dbusck   2    2  0·01 ± 0·10      –      –         –
†

k adj calculated from Taylor et al. (1979).

‡

Estimate of k of the negative binomial distribution (Bliss & Fisher 1953).