Empirical tests of frequency-dependent foraging on cryptic prey are rare; the best-studied examples involve either colored pellets of dough fed to free-ranging birds [ 7, 24, 25]or digital images of moths selected by trained Blue Jays (Cyanocitta cristata) [ 4, 26- 28].
Using G-tests of frequency distribution, species occurrences were compared in the following ways: (a) continuous forest vs. fragments; (b) continuous forest vs. second growth forest; (c) in second growth at different distances from continuous forest.
However, the technique does not provide a statistical test of frequency of lesion involvement.
Nevertheless, the MWU test of frequency spectra revealed several general patterns.
We used independent sample t-tests or covariance analyses for comparisons of mean, chi-square analyses for test of frequency data, and linear regression analysis for the association between BLLs and age.
The power of tests of sexual frequency between each subgroup was > 99% by NCSS-PASS (2005 version).
In addition, once individuals have been pooled they cannot be 'unpooled', thus tethering tests of allele frequency differences to the phenotype used for pooling [ 44].
Specific HIV testing behaviour-related variables included ever having undergone an HIV test, HIV testing frequency, date of last HIV testing and site of last HIV testing.
Pairwise FST values and heterogeneity tests of allele frequencies showed significant genetic differentiation between all populations.
For two traits, lipoprotein(a) levels and neutrophil count, aggregate tests of low-frequency and rare variation were significantly associated across multiple motifs.
Empirical tests of this frequency-dependent foraging hypothesis are rare, and the link between predator behaviour and maintenance of variation in prey has been difficult to confirm.
