@inproceedings{fdi:010078273,
  title = {{C}omplex small pelagic fish population patterns arising from individual behavioural responses to their environment [r{\'e}sum{\'e} de 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 {C}apet, {X}avier and {T}hiaw, {M}. and {M}baye, {B}.{C}. and {B}raham, {C}.{B}. and {E}ttahiri, {O}. and {C}harouki, {N}. and {N}daw, {O}.{S}. and {W}erner, {F}. and {B}rehmer, {P}atrice},
  editor = {},
  language = {{ENG}},
  abstract = {{S}mall pelagic fish ({SPF}) species are heavily exploited in eastern boundary upwelling systems ({EBUS}) as their transformation products are increasingly used in the world food chain. {M}anagement relies on regular monitoring, but there is a lack of robust theories for the emergence of the populations’ traits and their evolution in highly variable environments. {T}his work aims to address existing knowledge gaps by combining physical and biogeochemical modelling with an individual life-cycle based model applied to round sardinella ({S}ardinella aurita) off northwest {A}frica, a key species for regional food security. {O}ur approach focused on the processes responsible for seasonal migrations, spatio-temporal size-structure, and interannual biomass fluctuations. {E}mergence of preferred habitat resulted from interactions between natal homing behaviour and environmental variability that impacts early life stages. {E}xploration of the environment by the fishes was determined by swimming capabilities, mesoscale to regional habitat structure, and horizontal currents. {F}ish spatio-temporal abundance variability emerged from a complex combination of distinct life-history traits. {A}n alongshore gradient in fish size distributions is reported and validated by in situ measurements. {N}ew insights into population structure are provided, within an area where the species is abundant year-round ({M}auritania) and with latitudinal migrations of variable (300 to 1200 km) amplitude. {I}nterannual biomass fluctuations were linked to modulations of fish recruitment over the {S}ahara {B}ank driven by variability in alongshore current intensity. {T}he identified processes constitute an analytical framework that can be implemented in other {EBUS} and used to explore impacts of regional climate change on {SPF}.},
  keywords = {{AFRIQUE} {DU} {NORD} ; {AFRIQUE} {DE} {L}'{OUEST} ; {AFRIQUE} {SUBSAHARIENNE} ; {MAURITANIE} ; {ATLANTIQUE}},
  numero = {},
  pages = {140--141},
  booktitle = {{I}nternational conference {ICAWA} 2017 and 2018 : extended book of abstract : the {AWA} project : ecosystem approach to the management of fisheries and the marine environment in {W}est {A}frican waters},
  year = {2019},
  ISBN = {978-9553602-0-06},
  URL = {https://www.documentation.ird.fr/hor/fdi:010078273},
}