| metabolic rate and specific dynamic action of the red-legged honeycreeper, a nectar-feeding neotropical passerine. | rate of oxygen consumption (vo(2)) and carbon dioxide production (vco(2)) were measured in the red-legged honeycreeper (cyanerpes cyaneus, mean body mass 14.0+/-0.1g) at ambient temperatures (t(a)) between 15 degrees c and 35 degrees c to determine the basal metabolic rate (bmr). vo(2) in response to the light-dark cycle and the specific dynamic action (sda) effect was also investigated. bmr was estimated to be 2.mlo(2) g(-1)h(-1), 10% lower than expected according to the aschoff-pohl relationsh ... | 2010 | 20674760 |
| molecular identification of haemosporidia in avian endemics of gorgona island within a context for the eastern tropical pacific region. | island bird populations and their obligate blood parasites are of interest for understanding the accumulation of biodiversity and the evolutionary relationship with their mainland congeners. we examined avian haemosporidia cytochrome b gene among terrestrial birds on gorgona island national park, colombia. three haemoproteus haplotype groups found on gorgona island have a higher genetic similarity to haemoproteus found in the eastern tropical pacific than those documented in africa, asia, europe ... | 2020 | 31751754 |
| theoretical approaches to study the optical response of the red-legged honeycreeper's plumage (cyanerpes cyaneus). | in this paper, we investigate the unusual color effect exhibited by the plumage of the heads of cyanerpes cyaneus males, whose color turns from green to turquoise as the angle between the illumination and observation directions is increased. this singular color effect is characteristic of species that have quasi-ordered nanostructures of short-range order within the feather barbs. however, among species of the same family and even within feather patches of the same individual, one can find barbs ... | 2020 | 32400659 |