| auditory stimulation of reproductive function in male rufous-winged sparrows, aimophila carpalis. | prolonged exposure to conspecific song stimulates gonadal function and reproductive hormone secretion in female birds but few studies have investigated the physiological effects of conspecific song exposure on males outside of short-term, aggressive interactions. we exposed male rufous-winged sparrows, aimophila carpalis, either to conspecific song (cs song), to heterospecific song (black-throated sparrow, amphispiza bilineata; hs song), or to no recorded song (no song) for 59 consecutive days ( ... | 2008 | 17920598 |
| a phylogenetic analysis of the emberizid sparrows based on three mitochondrial genes. | previous molecular phylogenetic studies have examined the taxonomic relationships among a number of typical emberizid sparrow genera. to help clarify these relationships, we sequenced a 1673 base pair fragment for the complete sequence of three mitochondrial genes: adenosine triphosphatase (atp8 and atp6) and cytochrome oxidase subunit iii (coiii) for 38 sparrow species, along with passerina amoena (cardinalidae) and piranga ludoviciana (thraupidae) which were selected as the outgroups. our anal ... | 2003 | 12967606 |
| seasonal changes of the adrenocortical response to stress in birds of the sonoran desert. | many avian species of the north american sonoran desert, e.g., the black-throated sparrow, amphispiza bilineata, cactus wren, campylorhynchus brunneicapillus, and curve-billed thrasher, toxostoma curvirostre, can potentially breed from march/april to august. it is possible that, at least in summer, intense heat and aridity may have inhibitory effects on breeding by precipitating a stress response. stress typically results in a rise in secretion of adrenocorticosteroid hormones that then inhibit ... | 1992 | 1460439 |
| haemosporidian prevalence and parasitaemia in the black-throated sparrow (amphispiza bilineata) in central-mexican dryland habitats. | to date it is not well-understood how seasonality and human-induced habitat change may affect haemosporidian prevalence and parasitaemia in bird hosts in dryland habitats. we compared haemosporidian prevalence and parasitaemia between habitat types, including yucca-dominated scrublands (closed habitat) and creosotebush scrublands (open habitat), and between seasons, including non-breeding (dry) and breeding (wet) in the black-throated sparrow (amphispiza bilineata) at semi-arid scrublands of cen ... | 2017 | 28766152 |