@inproceedings{fdi:010067379,
  title = {{S}ex-ratio, size at maturity, spawning period and fecundity of bigeye tuna ({T}hunnus obesus) in the western {I}ndian {O}cean},
  author = {{Z}udaire, {I}. and {C}hassot, {E}mmanuel and {M}urua, {H}. and {D}hurmeea, {Z}. and {C}edras, {M}. and {B}odin, {N}athalie},
  editor = {},
  language = {{ENG}},
  abstract = {{O}pportunistic sampling of bigeye tuna ({T}hunnus obesus; {BET}) was conducted in the western {I}ndian {O}cean from 2010 to 2015 to study important reproductive traits (i.e., sex-ratio, size at maturity,spawning season and fecundity) with the aim to provide reliable information to improve the stock assessment. {O}verall 507 {BET} were sampled (including 204 females, 216 males and 87 indeterminate fishes) from which 158 ovaries were analyzed histologically. {S}ignificant bias towards females was found in the sex ratio of small individuals while males appeared dominant at large sizes. {H}igh reproductive activity was observed from {J}anuary to {M}arch. {T}he size at which 50% of females reach maturity ({L}50) was estimated at 102±4.5 cm fork length ({LF}), setting maturity threshold at primary vitellogenic oocyte stage. {M}ean batch fecundity ({FB}) was estimated at 0.75±0.52 million oocytes and mean relative batch fecundity ({FB}rel) at 11.54±7.11 oocytes per gram of fish weight. {N}o significant relationship between fecundity ({FB} and {FB}rel) and size ({LF}) was found.},
  keywords = {{OCEAN} {INDIEN}},
  numero = {{IOTC}-2016-{WPTT}18-37},
  pages = {21  multigr.},
  booktitle = {},
  year = {2016},
  URL = {https://www.documentation.ird.fr/hor/fdi:010067379},
}