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. Author manuscript; available in PMC: 2008 Oct 22.
Published in final edited form as: Horm Behav. 2006 Apr 27;50(2):223–236. doi: 10.1016/j.yhbeh.2006.03.005

Table 3.

Specific binding of linear 125I-V1a antagonist (decompositions per minute/mg following substraction of nonspecific binding; means ± SEM) in forebrain areas of five songbird species that differ selectively in their species-typical group sizes1.

Territorial Gregarious Highly Colonial
Area2 Melba Finch Violet-Eared Waxbill Angolan Blue Waxbill Spice Finch Zebra Finch Significant Sociality Contrasts3
Septal Complex:
LSr (LSr.m + LSr. dl) 770 ± 110a 1368 ± 239ac 2528 ± 315b 1132 ± 102ac 1733 ± 324c*** A**,C***,D**
LSc, pallial (LSc.dl + LSc.dm) 415 ± 49a 493 ± 83ac 1612 ± 186b 963 ± 109cd 1311 ± 273bd*** A***,B***,C***
LSc, subpallial (LSc.v + LSc.vl) 421 ± 56a 532 ± 70ab 610 ± 66ab 741 ± 115b 726 ± 102b* A**,B**
CcS 185 ± 71 225 ± 90 540 ± 230 502 ± 117 439 ± 173 A*,B*
MS 499 ± 59 529 ± 53 752 ± 93 861 ± 165 879 ± 165 A**,B**,C**
SH 121 ± 42 296 ± 117 465 ± 141 322 ± 99 539 ± 167 A*
Other forebrain areas:
N, medial 666 ± 56a 740 ± 69a 560 ± 60a 1474 ± 262b 889 ± 91a*** B**,D*
VP 450 ± 72 375 ± 60 534 ± 149 605 ± 166 320 ± 115
1

Different letters next to the means indicate significant species differences (Fisher's PLSD, p < .05) following significant ANOVA (* p < .05; ** p < .01; *** p < .001; sex × species; no main effects of sex were observed, thus male and female data are shown pooled). Four males and four females of each species were examined (total n = 40).

2

Data are not shown for target areas that exhibited no specific binding, including the Ac, AH, AM, BST, CoS, DMP, Hab, Hp, Inf, NDB, nPC, POA, and VMH. See Methods for abbreviations (“Nomenclature and abbreviations”).

3

Sociality contrasts were conducted by pooling subjects of a given grade of sociality (e.g., by pooling territorial or colonial species). Letters indicate main effects of sociality (* p < .05; ** p < .01; *** p < .001 in a two-way ANOVA including sex as a factor; see Results for sex effects). Contrast A: territorial versus flocking (“flocking” includes all three gregarious/colonial species). Contrast B: territorial versus colonial, excluding the intermediate Angolan blue waxbill. Contrast C: territorial versus moderately gregarious (Angolan blue waxbill). Contrast D: moderately gregarious versus colonial.