@article{fdi:010042658,
  title = {{O}tolith chemical signature and growth of {C}haetodon speculum in coastal areas of {N}ew {C}aledonia},
  author = {{L}abonne, {M}aylis and {M}orize, {E}ric and {K}ulbicki, {M}ichel and {P}onton, {D}ominique and {M}arec, {L}ouis},
  editor = {},
  language = {{ENG}},
  abstract = {{C}oral reefs are one of the most diverse ecosystems on {E}arth. {T}hey are currently exposed to increasing levels of anthropogenic perturbations. {S}everal recent reviews point to the lack of good indicators for these perturbations especially to monitor their effects on fish populations or fish assemblages. {T}he {SW} lagoon of {N}ew {C}aledonia is an ideal location to test indicator species in this context as contrasting sites are present within a small geographical range. {T}his study analysed fish from four sites, one with heavy industrial pollution, another dominated by domestic waste, a third with historic mining activities, and the fourth as a control. {T}he butterfly fish, {C}haetodon speculum, was chosen to determine {C}. speculum's potential as an indicator species due to its link to coral, its sedentary behaviour and its wide geographical distribution. {T}he size distribution, growth rate, age distribution and whole otolith composition were analysed at each site. {A}ge and mean growth rate were analysed from daily increments of the otoliths. {T}he concentrations of eight elements ({L}i, {M}g, {C}o, {N}i, {C}u, {R}b, {S}r, and {B}a) were measured by {ICP}-{MS} in the otoliths of a subset of individuals. {T}he sites under anthropogenic impact were distinct from the control site by fish size frequencies, age distributions, and the chemical content of their otoliths. {T}he chemical elements {M}g, {C}o, {N}i, {C}u, and {R}b showed differences amongst sites. {F}ish belonging to the sites furthest from {N}oumea could be discriminated in nearly 80% of samples or 60% of the cases when otolith weight or fish age respectively were taken into account. {N}i concentrations of the otoliths were also higher in the bays where water concentrations of this element were known to be higher, but these differences were no longer significant once corrected for otolith weight. {T}hese results should be mitigated by the fact that: (1) despite significant differences between sites in age distribution and size frequencies there were no differences in growth rates or body condition; (2) differences in age or size were not correlated to perturbation levels; and (3) discrimination between sites based on chemical levels in the otoliths, even though significant, was not sufficient to identify the origin of the fish at a level useful for screening tests. {T}he hypothesis that environmental differences between sites would be reflected in the otolith chemical composition is therefore not fully supported by our results.},
  keywords = {{O}toliths ; {T}race elements ; {G}rowth ; {I}ndicator ; {S}patial variation ; {M}ining ; {U}rban waste ; {S}outh-west pacific},
  booktitle = {},
  journal = {{E}stuarine {C}oastal and {S}helf {S}cience},
  volume = {78},
  numero = {3},
  pages = {493--504},
  ISSN = {0272-7714},
  year = {2008},
  DOI = {10.1016/j.ecss.2008.01.011},
  URL = {https://www.documentation.ird.fr/hor/fdi:010042658},
}