@article{fdi:010072054,
  title = {{S}patial distribution of main clupeid species in relation to acoustic assessment surveys in the continental shelves of {S}enegal and {T}he {G}ambia},
  author = {{S}arr{\'e}, {A}. and {K}rakstad, {J}. {O}. and {B}rehmer, {P}atrice and {M}bye, {E}. {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}his work compiles hydroacoustic recordings and catch data over {S}enegambia ({S}enegal and {T}he {G}ambia) from assessment surveys on the major clupeid species to identify sources of bias in abundance estimates caused by their horizontal distribution. {T}he latitudinal distribution of small pelagic fish is often well known, while their "across shelf" distribution on the continental shelf is less understood. {T}he southern part of the {S}enegambian shelf has a wide shallow water (< 10 m) area that makes up 20% (1500{NM}(2)) of the total shelf surface, while the northern part accounts for 3% (200{NM}(2)). {T}hese areas are not assessed by conventional fisheries acoustics surveys and therefore increase the uncertainty of the assessment of these species. {O}ur findings show that this likely introduces a bias in the assessment of {S}ardinella maderensis, while for {S}. aurita no major estimation-error is caused by their horizontal distribution. {T}he data confirm that {E}thmalosa fimbriata and {I}lisha africana are challenging to assess by conventional surveys, due to their mostly inshore distribution. {W}e emphasise the usefulness of assessing {S}. aurita through fisheries independent hydroacoustic surveys, and propose alternative methods to survey shallow water areas to reduce biases in biomass estimates and distribution mapping.},
  keywords = {{F}ish distribution ; {E}thmalosa fimbriata ; {I}lisha africana ; {S}ardinella spp. ; {W}est {A}frica ; {SENEGAL} ; {GAMBIE}},
  booktitle = {},
  journal = {{A}quatic {L}iving {R}esources},
  volume = {31},
  numero = {},
  pages = {art. 9 [10 ]},
  ISSN = {0990-7440},
  year = {2018},
  DOI = {10.1051/alr/2017049},
  URL = {https://www.documentation.ird.fr/hor/fdi:010072054},
}