@article{fdi:010073214,
  title = {{A} multimetric-index approach using fisheries data to assess fish assemblage structure in relation to salinity gradient in a tropical {W}est {A}frican estuary},
  author = {{K}antoussan, {J}. and {E}coutin, {J}ean-{M}arc and {L}a{\¨e}, {R}aymond and {T}hiaw, {O}. {T}. and {T}ito de {M}orais, {L}uis},
  editor = {},
  language = {{ENG}},
  abstract = {{T}his study examines the effects of increasing salinity on fish assemblage structure in the {C}asamance {E}stuary, {S}enegal. using a series of indices. {T}he study data were derived from commercial fishery surveys conducted between {A}pril and {J}uly 2005. {A}nalysis of within-trophic-group diversity in the {C}asamance {E}stuary shows a significant drop in the diversity of apex predators in the upper. more saline reaches of the estuary. {B}y contrast. primary consumers adapted well to salinity changes and exhibited higher taxonomic diversity in the upper reaches of the estuary than in the lower reaches. {T}he findings also indicate decreases in average sizes of the landed species and the trophic levels among fish catches in the direction of the upper reaches. {H}owever, the catch per unit effort ({CPUE}) was globally higher in the upstream area of the estuary as compared with the downstream area. {T}his increasing {CPUE} trend from the lower towards the upper reaches is attributed to (i) the high primary productivity in the upper {C}asamance {E}stuary; (ii) the increasing abundance of euryhaline fish species in an upstream direction: and (iii) 'telescoping' of the food chain through the presence of mostly herbivorous fishes in the upper reaches. {S}uch a situation likely facilitated high fish production in the upstream area of the estuary, though multimetric indices indicated unfavourable living conditions for many fish taxa in this area.},
  keywords = {biological indicators ; {C}asamance {E}stuary ; ecosystem monitoring ; fishery ; statistics ; inverse hypersaline estuary ; {S}enegal ; taxonomic diversity ; {SENEGAL} ; {AFRIQUE} {DE} {L}'{OUEST} ; {ZONE} {TROPICALE}},
  booktitle = {},
  journal = {{A}frican {J}ournal of {M}arine {S}cience},
  volume = {40},
  numero = {2},
  pages = {175--185},
  ISSN = {1814-232{X}},
  year = {2018},
  DOI = {10.2989/1814232x.2018.1474802},
  URL = {https://www.documentation.ird.fr/hor/fdi:010073214},
}