| comparative energetics of the giant hummingbird (patagona gigas). | hummingbirds (family trochilidae) represent an extreme outcome in vertebrate physiological design and are the only birds capable of sustained hovering. the giant hummingbird (patagona gigas) is the largest trochilid, with a mass of ~20 g, and is found over an altitudinal range from 0 to 4,500 m above sea level. we report here measurements of daily, basal, and hovering rates of oxygen consumption in the giant hummingbird; compare these values with data from smaller hummingbirds; and assess overal ... | 2011 | 21527824 |
| physiological responses of the giant hummingbird, patagona gigas. | | 1967 | 6079418 |
| bees may drive the reproduction of four sympatric cacti in a vanishing coastal mediterranean-type ecosystem. | sympatric congeneric plants might share pollinators, or each species might avoid competition by evolving specialized traits that generate partitions in pollinator assemblages. in both cases, pollen limitation (a decrease in the quality and quantity of compatible reproductive pollen) can occur, driving the plant mating system to autogamy as a mechanism of reproductive assurance. we assessed the relationships between pollinator assemblages and mating systems in a group of sympatric congeneric plan ... | 2019 | 31608183 |