| feather mercury concentrations in southern ocean seabirds: variation by species, site and time. | we studied mercury contamination in 25 seabird species breeding along a latitudinal gradient across the southern ocean, from gough island (40°s) through marion island (47°s) to byers peninsula (63°s). total mercury concentrations in body feather samples of adults caught at breeding colonies from 2008 to 2011 were determined. krill (euphausia spp.) and other zooplankton consumers had low mercury concentrations (gentoo penguin pygoscelis papua, chinstrap penguin pseudomonas antarctica, common divi ... | 2016 | 27267741 |
| corticosterone responses of grey-faced petrels (pterodroma macroptera gouldi) are higher during incubation than during other breeding stages. | we report the results of the first field study examining seasonal changes in corticosterone responses of typically long-lived birds of the order procellariiformes. in particular, we examined whether grey-faced petrels pterodroma macroptera gouldi showed changes in circulating baseline corticosterone concentrations and corticosterone responses to a standardized handling protocol across the breeding season. such changes have been associated with changes in body condition and variations in energy d ... | 2013 | 15702465 |
| non-precocial grey-faced petrel chicks (pterodroma macroptera gouldi) show no age-related variation in corticosterone responses to capture and handling. | development patterns in birds range from precocial species, which hatch chicks largely capable of independent existence, to altricial species, chicks of which are highly dependent on their parents for extended periods. previous work indicates precocial chicks have a robust corticosterone response from hatching whereas non-precocial and altricial chicks have a small response that increases through development. grey-faced petrels are characteristic of most burrowing procellariiform seabirds with n ... | 2008 | 18472100 |