@article{fdi:010088232,
  title = {{S}patiotemporal structure of narrow-barred {S}panish mackerel ({S}comberomorus commerson) from the {R}ed {S}ea and western {I}ndian {O}cean based on otolith micro-chemistry},
  author = {{S}ougueh, {M}. {A}. and {L}abonne, {M}aylis and {D}aher, {A}. and {A}li, {A}. and {K}aplan, {D}avid},
  editor = {},
  language = {{ENG}},
  abstract = {{T}hough the narrow-barred {S}panish mackerel ({S}comberomorus commerson) is considered to be migratory, the species is nevertheless thought to be locally overexploited in the northwest {I}ndian {O}cean. {A}t the regional level, this local depletion is a major concern for food security. {A}s the population structure and connectivity between sub-populations are poorly understood for this species, we examined the spatio-temporal dynamics of narrow-barred {S}panish mackerel via elemental concentrations ({P}, {M}g, {S}r and {B}a) along otolith transects using {LA}-{ICPMS} for samples from 6 sites: {E}gypt, {D}jibouti {N}orth and {S}outh, {S}omalia, {M}ozambique and {S}outh {A}frica. {F}or homogeneous size class samples (70-90 cm), otolith chemical signatures immediately preceding capture were used to accurately group individuals sharing a spatial proximity and/or season of capture. {N}otable differences in otolith edge signatures were found among individuals from north and south of the equator and contrasting cluster compositions from nearby sites in the {G}ulf of {A}den of individuals captured in summer versus winter. {O}tolith core chemistry identified two spawning chemical compositions. {T}he first common composition was characterized by relatively high concentrations of {S}r and lower concentrations of {P}, {B}a and {M}g. {T}he second less common spawning chemical composition was particularly rich in {P}, {B}a and {M}g and corresponded primarily to individuals caught off {M}ozambique, {S}omalia and {D}jibouti. {T}hese results are broadly consistent on one hand with patterns of water mass circulation in the {R}ed {S}ea and western {I}ndian {O}cean and on the other hand with the observed spawning seasons. {T}hough further research using, for example, archival tagging is needed to clarify the mechanisms behind these patterns, these results reveal the potential of otolith chemistry to provide insights into the spatio-temporal dynamics of narrow-barred {S}panish mackerel.},
  keywords = {{M}arine functional connectivity ; population structure ; {LA}-{ICP}-{MS} ; marine resource management ; artisanal fisheries ; {OCEAN} {INDIEN} ; {EGYPTE} ; {DJIBOUTI} ; {SOMALIE} ; {MOZAMBIQUE} ; {AFRIQUE} {DU} {SUD} ; {MER} {ROUGE}},
  booktitle = {},
  journal = {{A}quatic {L}iving {R}esources},
  volume = {36},
  numero = {},
  pages = {20 [17 p.]},
  ISSN = {0990-7440},
  year = {2023},
  DOI = {10.1051/alr/2023015},
  URL = {https://www.documentation.ird.fr/hor/fdi:010088232},
}