@article{fdi:010051432,
  title = {{I}s geometric morphometrics efficient for comparing otolith shape of different fish species ?},
  author = {{P}onton, {D}ominique},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he 2{D} shape of sagittae of {E}ncrasicholina devisi, {E}. heteroloba, {E}. cf. punctifer, and {S}tolephorus indicus, four tropical {E}ngraulididae of {N}ew {C}aledonia, was studied with 1) dimensionless shape descriptors (form factor, roundness, and aspect ratio); 2) elliptic {F}ourier analysis ({EFA}) and {F}ast {F}ourier {T}ransform ({FFT}) of 2{D} outline; and 3) geometric morphometrics ({GM}) based on four standard landmarks and nine semi-landmarks. {T}he largest sagittae of {E}. cf. punctifer were lacier, i.e., had a smaller form factor, than the sagittae of the other species. {T}he sagittae of {E}. devisi and {S}. indicus were more roundish, and presented a lower aspect ratio, than those of {E}. heteroloba and {E}. cf. punctifer. {B}etween-class correspondence analysis ({COA}) indicated that between-species inertia was the lowest when based on the 96 {F}ourier coefficients originating from {EFA}, and the highest when based on the 22 partial warps originating from {GM}. {A}s otoliths of different sizes from different species presented similar shapes, relative between-species inertia increased markedly when length, width, perimeter, and area were added to the set of variables originating from {EFA}, {FFT}, or {GM}. {D}espite otoliths having only a few, sparsely located, homologous landmarks, {GM} appeared slightly more efficient in distinguishing the sagittae of the four species and allowed visualization of the modification of otolith shape as they grow.},
  keywords = {{E}ngraulididae ; sagittae ; size ; form factors ; {F}ourier analysis ; thin plate spline},
  booktitle = {},
  journal = {{J}ournal of {M}orphology},
  volume = {267},
  numero = {6},
  pages = {750--757},
  ISSN = {0362-2525},
  year = {2006},
  DOI = {10.1002/jmor.10439},
  URL = {https://www.documentation.ird.fr/hor/fdi:010051432},
}