@inproceedings{fdi:010067260,
  title = {{M}orphometrics of albacore tuna ({T}hunnus alalunga) in the {W}estern {I}ndian {O}cean},
  author = {{D}hurmeea, {Z}. and {C}hassot, {E}mmanuel and {A}ugustin, {E}. and {A}ssan, {C}. and {N}ikolic, {N}. and {B}ourjea, {J}. and {W}est, {W}. and {A}ppaddo, {C}. and {B}odin, {N}athalie},
  editor = {},
  language = {{ENG}},
  abstract = {{T}his paper provides information on the length-length (fork-length, {FL} with pectoral length, {PL} and first dorsal length, {LD}1) and length-weight relationships of albacore tuna ({T}hunnus alalunga) in five regions of the {W}estern {I}ndian {O}cean. {D}ata were obtained for a total of 923 female and 867 male albacore, caught by different fishing gears, and sampled from 2013 to 2015. {T}he regression coefficients of the different relationships are presented. {P}ossible causes of variations in length-weight, including tissue weights (gonad, liver and the rest of the viscera), sex and region are assessed using analysis of covariance ({ANCOVA}) and linear regressions on log-transformed equations of length and weight. {T}here were significant differences in the relationships {FL}-{PL} ({F}(5,1054) = 5553, {P}<0.001) and {FL}-{LD}1 ({F}(5,921) = 307.2, {P}<0.001) between regions but no significant differences were found between sex. {S}ignificant interactions were also found between log({FL}) and region ({F}(4,1637) = 25.3, {P}<0.001), and log({FL}) and sex ({F}(1,1512) = 7.62, {P}<0.01). {F}or the relationship of somatic gutted weight with length, significant interactions were observed between {FL} and region ({F}(4,1509) = 71.43, {P}<0.001) but not with sex ({F}(1,1515) = 0.062, {P}>0.05). {T}he study shows that fixed values of a and b for the entire region may be misleading. {T}o minimise fluctuations in length-weight relationships, it is suggested to use somatic-gutted weight instead of whole fish weight and to use separate relationships for the northern part of the {W}estern {I}ndian {O}cean (where albacore may be in a fattening stage at their feeding ground) and the southern part, particularly between 10 and 30°{S} where spawning occurs.},
  keywords = {{OCEAN} {INDIEN}},
  numero = {{IOTC}-2016-{WPT}m{T}06-28},
  pages = {18},
  booktitle = {},
  year = {2016},
  URL = {https://www.documentation.ird.fr/hor/fdi:010067260},
}