| electron microscopic studies on the adenohypophysis of the white-crowned sparrow, zonotrichia leucophrys gambelii. | | 1969 | 4895251 |
| light-microscope studies of the cytology of the adenohypophysis of the white-crowned sparrow, zonotrichia leucophrys gambelii. | | 1969 | 4183639 |
| contributions of social cues and photoperiod to seasonal plasticity in the adult avian song control system. | in seasonally breeding birds, the vernal growth of the song system is thought to result primarily from increased daylength and the associated increase in circulating testosterone. other environmental factors such as social cues between mates influence the timing of reproduction, but less is known about how social cues might affect the song system and song behavior. we used white-crowned sparrows (zonotrichia leucophrys gambelii) to test the hypothesis that the presence of a female in breeding co ... | 1999 | 9870975 |
| the distribution of monoamine oxidase and acetylcholinesterase in the hypothalamus and its relation to the hypothalamo-hypophysial neurosecretory system in the white-crowned sparrow, zonotrichia leucophrys gambelii. | | 1966 | 5968189 |
| a possible endocrine basis for migratory behaviour in the white-crowned sparrow, zonotrichia leucophrys gambelii. | | 1965 | 5882804 |
| arterial blood supply to the brain of the white-crowned sparrow zonotrichia leucophrys gambelii. | | 1965 | 5851811 |
| acetylcholinesterase in the hypothalamo-hypophyseal axis of the white-crowned sparrow, zonotrichia leucophrys gambelii. | | 1968 | 5674702 |
| roles of photoperiod and testosterone in seasonal plasticity of the avian song control system. | the song control nuclei of songbirds undergo pronounced seasonal changes in size and neuronal attributes. the mechanisms by which seasonal changes in environmental variables such as photoperiod mediate seasonal changes in these brain regions are not known. manipulations of photoperiod and/or testosterone in captive songbirds induce seasonal changes in the size of song nuclei comparable to those observed in wild songbirds. it is unclear, however, whether the effects of photoperiod on the song nuc ... | 1997 | 9087894 |
| gender and seasonal differences in the adrenocortical response to acth challenge in an arctic passerine, zonotrichia leucophrys gambelii. | we evaluated the adrenocortical response to acute stress in free-living gambel's white-crowned sparrows (zonotrichia leucophrys gambelii) using a standardized capture stress protocol in which five serial blood samples (70 microliters) were taken for measurement of plasma corticosterone (b) over the course of an hour of captivity (at 1, 5, 10, 30, and 60 min). in field-captured birds, male plasma b levels rose two to four times higher than those of females under capture stress during the breeding ... | 1994 | 8045366 |
| [receptor types in the retina of zonotrichia leucophrys gambelii]. | | 1968 | 4894070 |
| a possible endocrine basis for premigratory fattening in the white-crowned sparrow, zonotrichia leucophrys gambelii (nuttall). | | 1964 | 14252202 |
| vascularization of the hypothalamo-hypophysial-complex in the white-crowned sparrow, zonotrichia leucophrys gambelii. | | 1964 | 14334648 |
| cholinesterases in the hypothalamo-hypophysial neurosecretory system of the white-crowned sparrow, zonotrichia leucophrys gambelii. | | 1964 | 14315538 |
| effects of reserpine on the white-crowned sparrow (zonotrichia leucophrys gambelii). | | 1967 | 6036408 |
| the tubero-infundibular neuron system: a component of the photoperiodic control mechanism of the white-crowned sparrow, zonotrichia leucophrys gambelii. | | 1967 | 4881289 |
| the pancreatic islets of the white-crowned sparrow, zonotrichia leucophrys gambelii, during its annual cycle and under experimental conditions. | | 1967 | 4877296 |
| evidence of a negative feedback on photoperiodically induced gonadal development in the white-crowned sparrow, zonotrichia leucophrys gambelii. | | 1966 | 5963171 |
| the development of the hypophysial portal system in the white-crowned sparrow, zonotrichia leucophrys gambelii. | | 1966 | 5987098 |
| observations on the uptake of 35-sulfur by the hypothalamo-hypophysial system of the white-crowned sparrow (zonotrichia leucophrys gambelii) following intraventricular injection of 35-s dl-cysteine. | | 1966 | 5973091 |
| the effect of photoperiodic stimulation on phosphatase activity in the hypothalamo-hypophysial system of the white-crowned sparrow, zonotrichia leucophrys gambelii. | | 1960 | 13757272 |
| the hypothalamo-hypophysial neurosecretory system of the white-crowned sparrow, zonotrichia leucophrys gambelii. | | 1959 | 14428560 |
| the relative roles of diurnal periods of activity and diurnal photoperiods in gonadal activation in male zonotrichia leucophrys gambelii (nuttall). | | 1953 | 13137555 |