@article{fdi:010066202,
  title = {{S}easonality in marine ecosystems : peruvian seabirds, anchovy, and oceanographic conditions},
  author = {{P}assuni, {G}. and {B}arbraud, {C}. and {C}haigneau, {A}lexis and {D}emarcq, {H}erv{\'e} and {L}edesma, {J}. and {B}ertrand, {A}rnaud and {C}astillo, {R}. and {P}erea, {A}. and {M}ori, {J}. and {V}iblanc, {V}. {A}. and {T}orres-{M}aita, {J}. and {B}ertrand, {S}ophie},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n fluctuating environments, matching breeding timing to periods of high resource availability is crucial for the fitness of many vertebrate species, and may have major consequences on population health. {Y}et, our understanding of the proximate environmental cues driving seasonal breeding is limited. {T}his is particularly the case in marine ecosystems, where key environmental factors and prey abundance and availability are seldom quantified. {T}he {N}orthern {H}umboldt {C}urrent {S}ystem ({NHCS}) is a highly productive, low-latitude ecosystem of moderate seasonality. {I}n this ecosystem, three tropical seabird species (the {G}uanay {C}ormorant {P}halacrocorax bougainvillii, the {P}eruvian {B}ooby {S}ula variegata, and the {P}eruvian {P}elican {P}elecanus thagus) live in sympatry and prey almost exclusively on anchovy, {E}ngraulis ringens. {F}rom {J}anuary 2003 to {D}ecember 2012, we monitored 31 breeding sites along the {P}eruvian coast to investigate the breeding cycle of these species. {W}e tested for relationships between breeding timing, oceanographic conditions, and prey availability using occupancy models. {W}e found that all three seabird species exhibited seasonal breeding patterns, with marked interspecific differences. {W}hereas breeding mainly started during the austral winter/early spring and ended in summer/early fall, this pattern was stronger in boobies and pelicans than in cormorants. {B}reeding onset mainly occurred when upwelling was intense but ecosystem productivity was below its annual maxima, and when anchovy were less available and in poor physiological condition. {C}onversely, the abundance and availability of anchovy improved during chick rearing and peaked around the time of fledging. {T}hese results suggest that breeding timing is adjusted so that fledging may occur under optimal environmental conditions, rather than being constrained by nutritional requirements during egg laying. {A}djusting breeding time so that fledglings meet optimal conditions at independence is unique compared with other upwelling ecosystems and could be explained by the relatively high abundances of anchovy occurring throughout the year in the {NHCS}.},
  keywords = {anchovy ; {E}ngraulis ringens ; {G}uanay {C}ormorant ; {N}orthern {H}umboldt {C}urrent ; {S}ystem ; occupancy model ; oceanographic variability ; {P}elecanus thagus ; {P}eru ; {P}eruvian {B}ooby ; {P}eruvian {P}elican ; {P}halacrocorax bougainvillii ; prey abundance ; seasonal breeding ; {S}ula variegata ; {PEROU} ; {PACIFIQUE}},
  booktitle = {},
  journal = {{E}cology},
  volume = {97},
  numero = {1},
  pages = {182--193},
  ISSN = {0012-9658},
  year = {2016},
  DOI = {10.1890/14-1134.1},
  URL = {https://www.documentation.ird.fr/hor/fdi:010066202},
}