@article{fdi:010090739,
  title = {{N}o distinct local cuisines among humpback whales : a population diet comparison in the {S}outhern {H}emisphere},
  author = {{G}rob, {J}. and {F}ranco-{S}antos, {R}. {M}. and {V}irtue, {P}. and {N}ichols, {P}. {D}. and {T}otterdell, {J}. and {M}arcondes, {M}. {C}. {C}. and {G}arrigue, {C}laire and {B}otero-{A}costa, {N}. and {C}hristiansen, {F}. and {C}astrillon, {J}. and {C}aballero, {S}. {J}. and {F}riedlaender, {A}. {S}. and {K}awaguchi, {S}. and {D}ouble, {M}. {C}. and {B}ell, {E}. {M}. and {M}akabe, {R}. and {M}oteki, {M}. and {H}oem, {N}. and {F}ry, {B}. and {B}urford, {M}. and {N}ash, {S}. {B}.},
  editor = {},
  language = {{ENG}},
  abstract = {{S}outhern hemisphere humpback whale ( {M}egaptera novaeangliae , {SHHW}) breeding populations follow a highfidelity {A}ntarctic krill ( {E}uphausia superba ) diet while feeding in distinct sectors of the {S}outhern {O}cean. {T}heir capital breeding life history requires predictable ecosystem productivity to fuel migration and migration -related behaviours. {I}t is therefore postulated that populations feeding in areas subject to the strongest climate change impacts are more likely to show the first signs of a departure from a high-fidelity krill diet. {W}e tested this hypothesis by investigating blubber fatty acid profiles and skin stable isotopes obtained from five {SHHW} populations in 2019, and comparing them to {A}ntarctic krill stable isotopes sampled in three {SHHW} feeding areas in the {S}outhern {O}cean in 2019. {F}atty acid profiles and delta 13 {C} and delta 15 {N} varied significantly among all five populations, however, calculated trophic positions did not (2.7 to 3.1). {S}imilarly, fatty acid ratios, 16:10)7c/16:0 and 20:50)3/22:60)3 were above 1, showing that whales from all five populations are secondary heterotrophs following an omnivorous diet with a diatom -origin. {T}hus, evidence for a potential departure from a high-fidelity {A}ntarctic krill diet was not seen in any population. delta 13 {C} of all populations were similar to delta 13 {C} of krill sampled in productive upwelling areas or the marginal sea -ice zone. {C}onsistency in trophic position and diet origin but significant fatty acid and stable isotope differences demonstrate that the observed variability arises at lower trophic levels. {O}ur results indicate that, at present, there is no evidence of a divergence from a high-fidelity krill diet. {N}evertheless, the characteristic isotopic signal of whales feeding in productive upwelling areas, or in the marginal sea -ice zone, implies that future cryosphere reductions could impact their feeding ecology.},
  keywords = {{A}ntarctic krill ; {C}limate change ; {D}iet ; {F}atty acids ; {S}table isotopes ; {S}entinel species ; {ANTARCTIQUE}},
  booktitle = {},
  journal = {{S}cience of the {T}otal {E}nvironment},
  volume = {931},
  numero = {},
  pages = {172939 [11 p.]},
  ISSN = {0048-9697},
  year = {2024},
  DOI = {10.1016/j.scitotenv.2024.172939},
  URL = {https://www.documentation.ird.fr/hor/fdi:010090739},
}