Skip to main content
. Author manuscript; available in PMC: 2011 Jun 1.
Published in final edited form as: J Evol Biol. 2010 Apr 6;23(6):1183–1194. doi: 10.1111/j.1420-9101.2010.01983.x

Table 5.

Ontogenetic differences in hematocrit and RBC counts. Among species, non-phylogenetic and phylogenetic analyses suggest that hematocrit and RBC counts are generally higher in adult males than in male juvenile conspecifics. The same difference is not found in females.

Trait & Comparison Test MLEs(λ, σε2); log(L) t df(Np) P
Hematocrit fem. A – J non-phylogenetic/non-error log(L) = 83.15 0.008 1.449 44 0.1543
phylogenetic/non-error λ = 1.00; log(L) = 97.51 0.034 1.177 43 0.2455
phylogenetic/error λ = 1.37; σε2 = 3.76; log(L) = 109.53 0.012 1.373 42 0.1769

Hematocrit males A – J non-phylogenetic/non-error log(L) = 86.02 0.036 7.165 42 <0.0001
phylogenetic/non-error λ = 0.083 log(L) = 86.04 0.035 4.508 41 <0.0001
phylogenetic/error λ = 0.0; σε2 = 2.27; log(L) = 86.54 0.036 7.285 40 <0.0001

RBC fem. A – J non-phylogenetic/non-error log(L) = −25.21 −0.05 −0.78 42 0.4420
phylogenetic/non-error λ = 1.02; log(L) = −16.03 0.224 0.489 41 0.6278
phylogenetic/error λ = 1.07; σε2 = 1.01; log(L) = −7.63 0.162 0.487 40 0.6290

RBC male A – J non-phylogenetic/non-error log(L) = −37.20 0.259 2.830 41 0.0072
phylogenetic/non-error λ=0.0; log(L) = −37.20 0.259 2.795 40 0.0079
phylogenetic/error λ = 0.0; σε2 = 9.22; log(L) = −32.72 0.245 3.947 39 0.0003

Note: A = Adults, J = Juveniles