@inproceedings{fdi:010091464,
  title = {{N}orthward migration of small pelagic fish off {W}est {A}frica : the barrier of the {S}ahara {B}ank in the context of climate change [r{\'e}sum{\'e}]},
  author = {{B}rochier, {T}imoth{\'e}e and {M}achu, {E}ric and {P}ecquerie, {L}aure and {T}hiaw, {M}. and {M}baye, {B}.{C}. and {B}raham, {C}.{B}. and {E}ttahiri, {O}. and {C}harouki, {N}. and {A}uger, {P}.{A}. and {B}rehmer, {P}atrice},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {N}orthwestern coast of {A}frica shelters is a wide part of the {C}anary {C}urrent {L}arge {M}arine {E}cosystem ({CCLME}). {S}mall pelagic fisheries are of major interest for the economics of the coastal states and food security of {S}ahel region. {F}urthermore, small pelagic fish are keystone species for the energy transfer from primary production to large predators in the upwelling ecosystems. {A}long the {CCLME} system, different small pelagic fish species dominates the catch. {I}n the {N}orthern part of the {CCLME} combining seasonal and permanent upwelling, {A}nchovies ({E}ngraulis encrasicolus) and sardines ({S}ardina pilchardus) dominate the catches from {G}ibraltar to {C}ape {B}lanc, while in the {S}outhern part, from {C}ape {B}lanc to {C}ape {R}oxo, where occur a seasonal upwelling, the main small pelagic species is the round sardinella ({S}ardinella aurita). {U}nderstanding the factors responsible of this ecological barrier is essential to address the potential effects of climate change on the spatial patterns of fish distribution. {W}e address this issue using a new individual based bio-physical model for round sardinella where the environmental forcing is taken from archived hydrodynamical and bio-geochemical simulations of the upwelling system from 10 to 35°{N}, with a 1/12° spatial resolution. {T}he model reproduces the main patterns of {S}. aurita seasonal migrations and inter-annual fluctuations. {T}he sensitivity tests performed with the model suggest that the northward limit of the {S}. aurita population is strongly related on the strength of the southward current in the {S}ahara {B}ank region. {M}ore generally, the collective fish swimming capacity may be a determinant factor for small pelagic fish species presence over the {S}ahara bank. {N}orth of 26°{N}, our bio-energetic model suggest that the combination of food limitation and low temperatures prevent the growth and maturation of {S}. aurita individuals. {T}he observed decreasing trends of the wind intensity and the increasing catches of sardinella reported {S}outh of {M}orocco and in the {C}anary {I}slands fit well with such outcome, and should be considered in climate change scenario.},
  keywords = {{AFRIQUE} {DU} {NORD} ; {AFRIQUE} {DE} {L}'{OUEST} ; {CANARIES} {COURANT} ; {SAHARA} {REGION}},
  numero = {},
  pages = {38},
  booktitle = {{PREFACE}-{PIRATA}-{CLIVAR} {T}ropical {A}tlantic {V}ariability {C}onference},
  year = {2015},
  URL = {https://www.documentation.ird.fr/hor/fdi:010091464},
}