@inproceedings{fdi:010078264, title = {{H}ydrographic control on larval fish assemblages : lessons from the {C}anary current ecosystem [r{\'e}sum{\'e}]}, author = {{T}iedemann, {M}. and {F}ock, {H}. and {B}rehmer, {P}atrice and {D}{\¨o}ring, {J}. and {B}{\¨o}rner, {G}. and {D}ove, {S}. and {E}kau, {W}. and {M}{\¨o}llmann, {C}.}, editor = {}, language = {{ENG}}, abstract = {{F}ronts, eddies, and upwelling shape larval fish habitats in the {C}anary {C}urrent {E}cosystem. {I}n the last five years, five sea-going expeditions have been undertaken to investigate the influence of these ocean processes on the life of fishes and their early life stages. {T}he use of different sampling techniques (e.g. midi/maxi multinet, {GULF} {VII}, and {CTD}) allowed us to understand horizontal and vertical larval fish distribution patterns. {F}rontal zones that function as natural barrier for plankton drift were identified enabling the formation of spatially segregated larval fish assemblages. {M}esoscale eddies compensated an offshore drift of water masses during the upwelling process retaining fish larvae at the shelf break. {A}n upwelling intensity driven spatio-temporal niche partitioning was observed between larval round sardinella ({S}ardinella aurita) and larval {E}uropean sardine ({S}ardina pilchardus). {W}hile climate models predict a change of the upwelling intensity in upwelling ecosystems, we suggest that dominance relationships of small pelagic fishes will fluctuate according to upwelling intensity variation. {T}he results of our studies improve the understanding of how fishes avail the dominant physical features in upwelling ecosystems and aid to comprehend population dynamics.}, keywords = {{AFRIQUE} {DE} {L}'{OUEST} ; {ATLANTIQUE} ; {CANARIAS} ; {CANARIES}}, numero = {}, pages = {123}, 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:010078264}, }