@article{fdi:010065783,
  title = {{F}luctuating asymmetry in fish otoliths and heterozygosity in stressful estuarine environments ({W}est {A}frica)},
  author = {{P}anfili, {J}. and {D}urand, {J}. {D}. and {D}iop, {K}. and {G}ourene, {B}. and {S}imier, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{F}luctuating asymmetry ({FA}) is assumed to reflect the developmental instability caused by environmental or genetic stress. {F}ish otoliths represent a very good tool for investigating the consequence of different effects on {FA}. {O}tolith {FA} analysis, coupled with genetic analysis, has been undertaken on two common {W}est {A}frican estuarine species, {E}thmalosa fimbriata ({EFI}) and {S}arotherodon melanotheron ({SME}), in two neighbouring estuaries, in order to highlight the impact of salinity on developmental stability. {T}he {G}ambia estuary has a normal functioning and the {S}aloum estuary is inverse (saltier waters in the upper river), reaching extremely high salinities (>100 psu) and constituting severe environmental stress. {F}ive sub-populations of {EFI} and six of {SME} were studied along a salinity gradient. {T}he differences between right and left otoliths were estimated with image processing by measuring five dimensions (area, perimeter, diameter, rostrum and posterior radii). {A}nalyses of genetic differentiation at three {EPIC} and one anonymous nuclear gene loci for {EFI} and six polymorphic enzymatic loci for {SME} were carried out to measure the level of heterozygosity. {A}bsolute {FA} in all otolith traits examined was unaffected by gender but increased significantly with fish size. {S}ize-corrected absolute {FA} did not show any significant difference among sites differing largely in salinity, although a higher asymmetry in otolith area was recorded in the saltiest site. {T}hese findings suggest that otolith asymmetry is a poor indicator of osmotic stress. {T}he individual heterozygosity level did not seem to have an effect on otolith {FA} for either species, even though a slight correlation appeared with otolith area or perimeter. {O}tolith {FA} cannot be considered to be a useful indicator for estimating changes linked with environmental or genetic stress in these estuaries.},
  keywords = {bio indicator ; environmental stress ; {E}thmalosa fimbriata ; {S}arotherodon melanotheron ; {SENEGAL} ; {GAMBIE} ; {SINE} {SALOUM}},
  booktitle = {},
  journal = {{M}arine and {F}reshwater {R}esearch},
  volume = {56},
  numero = {5},
  pages = {505--516},
  ISSN = {1323-1650},
  year = {2005},
  DOI = {10.1071/{MF}04138},
  URL = {https://www.documentation.ird.fr/hor/fdi:010065783},
}