| blood parasites of blue grouse (dendragapus obscurus) in western north america. | three hundred thirty-three blue grouse (dendragapus obscurus) were examined for blood parasites from 11 sites: southern yukon territory, southeast coastal alaska, northern and central interior british columbia, south coastal british columbia, northcentral washington, southcentral oregon, northwestern california, eastcentral nevada, northwestern colorado, and westcentral montana. three species of protozoan parasites (leucocytozoon lovati, haemoproteus mansoni, trypanosoma avium) and a splendidofi ... | 1991 | 1920670 |
| phylogeny of tetraoninae and other galliform birds using mitochondrial 12s and nd2 genes. | the avian subfamily tetraoninae (grouse and ptarmigan) is a holarctic group in the order galliformes distinguished by morphological adaptations to cold environments and behavioral traits associated with elaborate courtship. here we investigate the relationships of 17 tetraonines and 12 other galliform species using mitochondrial 12s and nd2 sequence data. we found support for the recent phylogenetic classification that separates the genus dendragapus into two genera, falcipennis and dendragapus. ... | 2002 | 12144757 |
| molecular phylogeny of grouse: individual and combined performance of w-linked, autosomal, and mitochondrial loci. | the phylogeny of grouse (aves: tetraoninae) was reconstructed using four noncoding loci: two were w-linked, one was autosomal, and one was the mitochondrial control region (cr). the rapidly evolving cr provided resolution throughout the tree, whereas the slowly evolving nuclear loci failed to resolve deeper nodes. the tree based on all four loci combined was almost identical to the cr tree and did not improve resolution or bootstrap support. the stemminess and imbalance of the trees were good de ... | 2002 | 12554459 |
| phylogeographic structure, gene flow and species status in blue grouse (dendragapus obscurus). | we investigated the genetic population structure and species status of a relatively sedentary bird that is a permanent resident of western north american forests, the blue grouse (dendragapus obscurus). phylogenetic analysis of complete mitochondrial control region dna sequences resulted in the identification of three basal clades of haplotypes that were largely congruent with well-known biogeographical regions. these clades corresponded to the parapatric sooty (d. o. fuliginosus) and dusky (d. ... | 2004 | 15189213 |
| trace metal depositional patterns from an open pit mining activity as revealed by archived avian gizzard contents. | archived samples of blue grouse (dendragapus obscurus) gizzard contents, inclusive of grit, collected yearly between 1959 and 1970 were analyzed for cadmium, lead, zinc, and copper content. approximately halfway through the 12-year sampling period, an open-pit copper mine began activities, then ceased operations 2 years later. thus the archived samples provided a unique opportunity to determine if avian gizzard contents, inclusive of grit, could reveal patterns in the anthropogenic deposition of ... | 2011 | 21195454 |
| blood parasites of blue grouse: variation in prevalence and patterns of interspecific association. | blood parasites of blue grouse (dendragapus obscurus) were sampled and the factors responsible for variation in prevalence of blood parasites, and patterns of association among parasite species, were investigated. five genera of haematozoa were surveyed including four protozoans (haemoproteus, leucocytozoon, plasmodium, and trypanosoma) and a nematode (splendidofilaria). prevalence of blood parasites varied significantly between years; sexes differed in number of parasite species in one of two y ... | 1994 | 28313742 |
| why do grouse have ceca? a test of the fiber digestion theory. | two predictions deduced from the theory that grouse ceca function primarily to provide a suitable environment for the fermentation of plant fiber were tested. digestion of neutral detergent fiber in conifer needles by blue grouse (dendragapus obscurus) varied from 7.5 to 17.3% across tree species, but, contrary to prediction, the energy potentially derivable from this fiber digestion was insufficient to make ceca energetically profitable. variation in digestibility of fiber among birds and acros ... | 1989 | 2575134 |
| populations of leucocytozoon gametocytes in blue grouse (dendragapus obscurus) from hardwicke island, british columbia. | population dynamics of round and elongate gametocytes of leucocytozoon in wild and captive blue grouse (dendragapus obscurus (say)) from hardwicke island, british columbia, were studied from 1980 to 1982. blue grouse chicks were sampled weekly throughout each transmission season. three patterns in the type of gametocyte produced during primary infection were observed in naturally infected captive and wild blue grouse chicks. such variation in the expression of the gametocyte stage within a singl ... | 1987 | 3123644 |
| two new species of coccidia, eimeria leucuri and e. oreoecetes (protozoa: eimeriidae), in grouse from colorado. | eimeria leucuri is described from white-tailed ptarmigan (lagopus leucurus), and e. oreoecetes from white-tailed ptarmigan and blue grouse (dendragapus obscurus) from colorado. oocysts of e. leucuri are ellipsoidal, 26.6 by 17.7 micron, each bearing a micropyle, micropyle cap, up to 4 polar granules, but no oocyst residuum. the lemon-shaped sporocysts are 15.4 by 6.7 micron, and have stieda bodies and large amounts of sporocyst residuum. the sporocyst contents are enclosed in a membrane. oocysts ... | 1979 | 448611 |
| primary molt of the blue grouse (dendragapus obscurus) and its relation to reproductive activity and migration. | | 1977 | 589526 |
| temporal and spatial patterns of allele and genotype frequencies at the ng locus in blue grouse (dendragapus obscurus). | | 1972 | 4676377 |
| physalopterine larvae in muscles of blue grouse and a chukar partridge. | | 1986 | 3505945 |
| removal and replacement of male blue grouse on persistent and transient territorial sites. | | 1980 | 7427828 |
| demography and genetics in colonizing populations of blue grouse (dendragapus obscurus). | | 1973 | 28563531 |
| aggressive behavior and the dispersion of female blue grouse. | | 1968 | 5690287 |
| population attributes of blue grouse in southwestern alberta. | | 1966 | 5919293 |
| the blood parasites of the blue grouse. | | 1946 | 20985150 |
| the blood parasites of the blue grouse. | | 1946 | 17808054 |