title: Georgraphic and morphological variation in the presence and absence of the pelvic skeleton in the brook stickleback, Culaea inconstans (Kirtland), in Alberta and Saskatchewan.
mesh_terms: D000416:Alberta; D000704:Analysis of Variance; D000818:Animals; D005399:Fishes / Q000033:anatomy & histology*; D005843:Geography; D010388:Pelvis / Q000033:anatomy & histology; D012525:Saskatchewan; D013045:Species Specificity; D013131:Spine / Q000033:anatomy & histology*