@article{fdi:010079454,
  title = {{S}table isotope patterns of mesopelagic communities over two shallow seamounts of the south-western {I}ndian {O}cean},
  author = {{A}nnasawmy, {P}. and {C}herel, {Y}. and {R}omanov, {E}. {V}. and {L}e {L}oc'h, {F}ran{\c{c}}ois and {M}{\'e}nard, {F}r{\'e}d{\'e}ric and {T}ernon, {J}ean-{F}ran{\c{c}}ois and {M}arsac, {F}rancis},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he stable carbon (delta {C}-13) and nitrogen (delta {N}-15) isotope values of soft tissues of micronekton (crustaceans, squid, mesopelagic fish) and zooplankton were measured from organisms collected on the {RV} {A}ntea at two seamounts located in the south-western {I}ndian {O}cean: {L}a {P}erouse (summit depth similar to 60 m) and "{MAD}-{R}idge" (thus named in this study; summit depth similar to 240 m). {S}urface particulate organic matter ({POM}-{S}urf) showed higher delta {C}-13 at the more productive {MAD}-{R}idge than at the oligotrophic {L}a {P}erouse seamount. {P}articulate organic matter and zooplankton were depleted in {N}-15 at {L}a {P}emuse pinnacle compared with {MAD}-{R}idge. {G}elatinous organisms and crustaceans occupied the lowest and intermediate tmphic levels ({TL} similar to 2 and 3 respectively) at both seamounts. {M}esopelagic fish and smaller-sized squid sampled at both seamounts occupied {TL} similar to 3 to 4, whereas the large nektonic squid, {O}mmastrephes bartramii, collected at {MAD}-{R}idge only, exhibited a {TL} of similar to 5. {T}he delta {N}-15 values of common open-water mesopelagic taxa were strongly influenced by specimen size and feeding habits at both seamounts, with an increase in delta {N}-15 values with increasing size. {C}arnivorous fish species sampled exclusively over the seamounts' flanks and summits exhibited {TL} values of similar to 4, irrespective of their wide size ranges. {T}he work could not demonstrate any differences in delta {C}-13 values of mesopelagic fish between the seamounts and the surrounding oceanic areas. {T}he study segregated clusters of mesopelagic organisms according to their delta {C}-13 and delta {N}-15 values, with variations in stable isotope values reflecting a complex range of processes possibly linked to productivity as well as biological and ecological traits of the species (size and feeding mode).},
  keywords = {{M}icronekton ; {C}rustaceans ; {F}ish ; delta {C}-13 ; delta {N}-15 ; {T}rophic level ; {S}quid ; {OCEAN} {INDIEN} ;  ; {MADAGASCAR} {PLATEAU} ; {LA} {PEROUSE} {MONT}},
  booktitle = {{B}io-physical coupling around three shallow seamounts in the {S}outh {W}estern {I}ndian {O}cean, with regional comparisons based on modelling, remote sensing and observational studies},
  journal = {{D}eep-{S}ea {R}esearch {P}art {II} : {T}opical {S}tudies in {O}ceanography},
  volume = {176},
  numero = {{N}o sp{\'e}cial},
  pages = {art. 104804 [15 ]},
  ISSN = {0967-0645},
  year = {2020},
  DOI = {10.1016/j.dsr2.2020.104804},
  URL = {https://www.documentation.ird.fr/hor/fdi:010079454},
}