@article{fdi:010061387, title = {{D}ivergent post-breeding distribution and habitat associations of fledgling and adult black-footed {A}lbatrosses {P}hoebastria nigripes in the {N}orth {P}acific}, author = {{G}utowsky, {S}. {E}. and {T}remblay, {Y}ann and {K}appes, {M}. {A}. and {F}lint, {E}. {N}. and {K}lavitter, {J}. and {L}aniawe, {L}. and {C}osta, {D}. {P}. and {N}aughton, {M}. {B}. and {R}omano, {M}. {D}. and {S}haffer, {S}. {A}.}, editor = {}, language = {{ENG}}, abstract = {{P}ast tracking studies of marine animals have primarily targeted adults, biasing our understanding of at-sea habitat use toward older life stages. {A}nthropogenic threats persist throughout the at-sea ranges of all life stages and it is therefore of interest to population ecologists and managers alike to understand spatiotemporal distributions and possible niche differentiation between age-classes. {I}n albatrosses, particularly little is known about the juvenile life stage when fledglings depart the colonies and venture to sea with no prior experience or parental guidance. {W}e compared the dispersal of 22 fledgling {B}lack-footed {A}lbatross {P}hoebastria nigripes between 2006 and 2008 using satellite telemetry and 16 adults between 2008 and 2009 using geolocaters from {M}idway {A}toll {N}ational {W}ildlife {R}efuge, {N}orthwest {H}awaiian {I}slands. {F}ollowing tag deployment, all fledglings spent several days within the calm atoll waters, then travelled northward until reaching 750-900km from the colony. {A}t this point, fledgling distributions approached the productive {N}orth {P}acific {T}ransition {Z}one ({NPTZ}). {R}ather than reaching the high chlorophyll a densities on the leading edge of this zone, however, fledglings remained in areas of low productivity in the subtropical gyre. {I}n contrast, adult albatrosses from the same breeding colony did not utilize the {NPTZ} at this time of year but rather ranged throughout the highly productive northern periphery of the {P}acific {O}cean {B}asin among the shelf regions off {J}apan and the {A}leutian {I}slands. {T}he dichotomy in habitat use between fledglings and adults from {M}idway {A}toll results in complete spatial segregation between age-classes and suggests ontogenetic niche separation in this species. {T}his research fills a large knowledge gap in at-sea habitat use during a little known yet critical life stage of albatrosses, and contributes to a more comprehensive understanding of differential mortality pressure between age-classes and overall conservation status for the vulnerable {B}lack-footed {A}lbatross.}, keywords = {dispersal ; geolocators ; habitat use ; juvenile ; {P}rocellariiform ; satellite telemetry ; seabird ; {PACIFIQUE} {NORD} ; {HAWAII}}, booktitle = {}, journal = {{I}bis}, volume = {156}, numero = {1}, pages = {60--72}, ISSN = {0019-1019}, year = {2014}, DOI = {10.1111/ibi.12119}, URL = {https://www.documentation.ird.fr/hor/fdi:010061387}, }