@inproceedings{fdi:010072122,
  title = {{C}limate-driven shift of {S}ardinella aurita stock in {N}orthwest {A}frica ecosystem as evidenced by robust spatial indicators [r{\'e}sum{\'e}]},
  author = {{S}arr{\'e}, {A}. and {D}emarcq, {H}erv{\'e} and {F}aye, {S}. and {B}rehmer, {P}atrice and {K}rakstad, {J}.{O}. and {T}hiao, {D}. and {E}layoubi, {S}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n {N}orthwest {A}frica, the small pelagic fish are in abundance and play a crucial role for the food safety of populations. {T}he pelagic resources are exploited both by small-scale artisanal and industrial fleets. {T}he landing structure of the countries in the region has been in perpetual change during the last years. {T}he sardinella has been more and more landed by fishermen in {M}orocco, while the sardine has become a target by fishing vessels in {M}auritania and {S}enegal. {T}his indicates a modification in the distribution areas of pelagic resources. {T}o verify this hypothesis, an outstanding database consisting in 14 acoustic surveys with a consistent and high sampling intensity (2263 trawl hauls) conducted by the {RV} {F}ridtjof {N}ansen from 1995 to 2015 was investigated in this study to identify trends in distribution shifts in pelagic fishes. {A} focus was made on sardinellas and the main species in the southern part of the region. {T}wo strong spatial indicators are used in this study: the latitudinal extreme location and the barycentre of biomasses. {T}wo clear trends can be observed from the data analysed. {F}irstly, in the southern and tropical part of this system the typical trend is that pelagic species show an increasing northward distribution. {T}his applies to {S}. aurita, {T}rachurus trecae, {C}hloroscombrus chrysurus, {S}phyraena guachancho and {B}rachydeuterus auritu. {A} second group is observed, those that do not show any clear trend in distributional shift, but where the distribution is stable over the period. {T}he typical species observed here are {S}. maderensis and {D}ecapterus rhonchus. {D}espite some variations in the upwelling intensity, we show that the sea surface temperature is by far the main parameter to explain this northern shift. {W}e also discuss the likely - and largely unknown - influence of the under-estimation of the detections because of the absence of sampling in the shallow coastal zone. {T}he impact of such displacements is also discussed in term of regional management of these shared stocks.},
  keywords = {{AFRIQUE} {DE} {L}'{OUEST} ; {SENEGAL} ; {ATLANTIQUE}},
  numero = {},
  pages = {67--68},
  booktitle = {{I}nternational conference {ICAWA} 2016 : 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 = {2017},
  ISBN = {978-2-9553602-0-5},
  URL = {https://www.documentation.ird.fr/hor/fdi:010072122},
}