@article{fdi:010081689,
  title = {{A}ustral fall-winter transition of mesozooplankton assemblages and krill aggregations in an embayment west of the {A}ntarctic {P}eninsula},
  author = {{E}spinasse, {B}. and {Z}hou, {M}. and {Z}hu, {Y}. {W}. and {H}azen, {E}. {L}. and {F}riedlaender, {A}. {S}. and {N}owacek, {D}. {P}. and {C}hu, {D}. {Z}. and {C}arlotti, {F}ran{\c{c}}ois},
  editor = {},
  language = {{ENG}},
  abstract = {{T}o assess krill aggregations and humpback whale {M}egaptera novaeangliae foraging behavior, spatial and temporal relationships between {A}ntarctic krill {E}uphausia superba and zooplankton taxonomic groups were studied during an interdisciplinary cruise conducted in {M}ay and {J}une 2009 within {W}ilhelmina {B}ay on the western side of the {A}ntarctic {P}eninsula. {A} vessel-mounted acoustic {D}oppler current profiler ({ADCP}) and a calibrated {EK}-60 echo sounder were used to assess circulation patterns and krill distributions in the bay, and a multiple opening and closing net (with 333 mu m mesh) and environmental sensing system ({MOCNESS}) was used to collect live samples of mesozooplankton and krill for taxonomic composition analysis. {T}he results from this field study complement a previous one that examined an anticyclonic bay-scale circulation of {A}ntarctic krill. {T}his super-aggregation of krill covered similar to 100 km(2), had a concentration of 1000s of individuals m(-2) and was associated with more than 306 humpback whales present in {W}ilhelmina {B}ay. {O}ur results from the mesozooplankton study revealed that krill continuously conducted diel vertical migrations and formed aggregations in the inner bay, while the chlorophyll concentration at the surface decreased from 2.2 to 0.6 g {C} m(-2) due to the decrease of daylight, and zooplankton concentrations increased from 0.5 to 1.5 g {C} m(-2) probably from advective influx. {M}ost zooplankton were distributed below 200 m while krill fed in the upper 150 m. {T}he spatial and temporal correlations between krill and small-to medium-sized mesozooplankton imply that krill may become omnivorous when there is a lack of phytoplankton in the late austral fall. {T}hough both phytoplankton and zooplankton biomasses contributed only small fractions of the daily ration needed for krill metabolism in {W}ilhelmina {B}ay, it is not clear what caused krill to aggregate on such a large scale, as this led to high mortality as a result of starvation and predation by whales and other top predators.},
  keywords = {{A}ntarctic {P}eninsula ; {C}hlorophyll ; {Z}ooplankton ; {K}rill ; {F}ood web ; {A}ustral fall},
  booktitle = {},
  journal = {{M}arine {E}cology : {P}rogress {S}eries},
  volume = {452},
  numero = {},
  pages = {63--80},
  ISSN = {0171-8630},
  year = {2012},
  DOI = {10.3354/meps09626},
  URL = {https://www.documentation.ird.fr/hor/fdi:010081689},
}