Exact(3)
Positive selection was estimated by the maximum likelihood method available in CODEML, PAML 4 using the F3X4 model of codon frequencies and paired nested site models of sequence evolution (M0, M3; M2a, M8a; M7, M8) [ 24, 61, 62].
Comparisons between the two nested site models were performed to evaluate the variation in ω (M3 vs. M0) and to determine the presence of a positively selected class of sites (M2a vs. M1a; M8 vs. M7 and M8 vs. M8a).
We then used site models that compare the fit of two nested site specific models to the data – a neutral model that does not admit positive selection (ω < = 1) and a more general, alternative model that admits positive selection (ω > 1).
Similar(57)
Selection inferred using likelihood ratio tests between nested site-specific models.
The general approach used to reduce rock dove populations is nesting site prevention.
The birds' nesting site was blocked when netting was installed.
Nesting site fidelity: The straight-line distance from the original tagging location and successive inferred nests determined nesting site fidelity.
Bald eagles check nesting sites in spruce snags.
Eggs and chicks are sometimes claimed from nesting sites by skuas and gulls.
"That wide range, and their multiplicity of nesting sites, should make them extinction-proof," Safina writes.
Seabirds are shunning coconut palms as nesting sites, sending a ripple through island ecosystems.
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