@inproceedings{fdi:010064371,
  title = {{I}nvestigating {S}ardinella aurita seasonal migratory pattern off {N}orth-{W}est {A}frica with a biophysical model : poster},
  author = {{B}rochier, {T}imoth{\'e}e and {A}uger, {P}ierre-{A}ma{\¨e}l and {P}ecquerie, {L}aure and {M}achu, {E}ric and {M}baye, {B}.{C}. and {T}hiaw, {M}. and {B}rehmer, {P}atrice},
  editor = {},
  language = {{ENG}},
  abstract = {{S}ardinella aurita, or round sardinella, has been the main small pelagic fish species harvested off {S}enegal and {M}auritania coasts over the last 4 decades and plays a central role for sub-regional food security and economic incomes. {T}he landings of this species have strongly declined recently. {I}ntense exploitation and climate change are acting together but population's dynamics are too poorly understood to disantangle the different drivers and to clearly evaluate the current state of {S}. aurita's population. {I}n the present study, we developed a bio-physical, individual based model for {S}. aurita population off {N}orth-{W}est {A}frica. {T}he hydrodynamic environment was simulated by a regional model ("{ROMS}") configuration covering the area 5°-40°{N} and 5°-30°{W}, with a 8km resolution and 32 sigma-levels in our area of interest. {T}he biogeochemical compartments were simulated using the {PISCES} model coupled with {ROMS}. {F}ish schools of {S}. aurita were represented by active lagrangian markers affected with ad hoc larval, juvenile and adult fish swimming behavior. {I}ndividual's physiology was described following the local temperature and food availability by the {D}ynamic {E}nergy {B}udget model "{DEB}". {T}he extended kinesis algorithm ruled the horizontal fish movement and depends on food research, individual temperature preference and spawning migration, whereas fish vertical position in the water column was set for each stage according to scientific knowledge. {W}e investigate the predicted seasonal migrations pattern of {S}. aurita off {W}est {A}frica over the period 1980-2006. {T}hen we also evaluate the fluctuations of fish biomass available for coastal fisheries (h<200m) in 4 distinct areas from the western {S}aharan bank (24°{N}) down to the {B}ijagos islands (11°{N}) and compare with the available fish landings data on this period. {F}inally, we calculate seasonal connectivity indices between the populations in the 4 areas selected as the percentage of fish present in an area that was born in another area.},
  keywords = {{ATLANTIQUE} ; {MAURITANIE} ; {SENEGAL}},
  numero = {},
  pages = {458},
  booktitle = {{B}ook of {A}bstracts submitted to the {IV} {C}ongress of {M}arine {S}ciences},
  year = {2014},
  ISBN = {978-84-697-0471-4},
  URL = {https://www.documentation.ird.fr/hor/fdi:010064371},
}