@article{fdi:010060362,
  title = {{I}nvestigating stock structure and trophic relationships among island-associated dolphins in the oceanic waters of the {N}orth {A}tlantic using fatty acid and stable isotope analyses},
  author = {{Q}u{\'e}rouil, {S}ophie and {K}iszka, {J}. and {C}ordeiro, {A}. {R}. and {C}ascao, {I}. and {F}reitas, {L}. and {D}inis, {A}. and {A}lves, {F}. and {S}antos, {R}. {S}. and {B}andarra, {N}. {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{S}hort-beaked common dolphins ({D}elphinus delphis) and {A}tlantic spotted dolphins ({S}tenella frontalis) are the two most abundant cetacean species in the oceanic waters of {M}adeira and the {A}zores. {T}hey are of similar size, occur in similar habitats and are regularly observed in mixed-species groups to forage together. {G}enetic analyses suggested that, within each species, dolphins ranging around both archipelagos belong to the same panmictic population. {W}e tested the hypotheses that (1) within each species, individuals from the two archipelagos belong to a single ecological stock; (2) between species, common and spotted dolphins have distinct trophic niches; using fatty acid ({FA}) and stable isotope ({SI}) analyses. {F}atty acids and stable isotopes were analysed from 86 blubber and 150 skin samples of free-ranging dolphins, respectively. {S}ex-related differences were not significant, except for common dolphin {FA} profiles. {I}n {S}. frontalis, {FA} and {SI} differences between archipelagos suggested that individuals belonged to different ecological stocks, despite the existence of gene flow between the two archipelagos. {I}n {D}. delphis, differences were more pronounced, but it was not possible to distinguish between stock structure and a seasonal effect, due to differential sampling periods in the {A}zores and {M}adeira. {I}nter-specific comparisons were restricted to the {A}zores where all samples were collected during summer. {D}ifferences in {FA} proportions, noticeably for {FA} of dietary origin, as well as in nitrogen {SI} profiles, confirmed that both species feed on distinct resources. {T}his study emphasizes the need for an integrated approach including both genetic and biochemical analyses for stock assessment, especially in wide-ranging marine top predators.},
  keywords = {{OCEAN} {ATLANTIQUE} ; {ATLANTIQUE} {ILES} ; {MADEIRA} ; {ACORES}},
  booktitle = {},
  journal = {{M}arine {B}iology},
  volume = {160},
  numero = {6},
  pages = {1325--1337},
  ISSN = {0025-3162},
  year = {2013},
  DOI = {10.1007/s00227-013-2184-x},
  URL = {https://www.documentation.ird.fr/hor/fdi:010060362},
}