@inproceedings{fdi:010063742,
  title = {{T}entative sequential population analysis of {I}ndian {O}cean skipjack catch at size},
  author = {{F}onteneau, {A}lain},
  editor = {},
  language = {{ENG}},
  abstract = {{T}his paper is attempting to do a simplified sequential population analysis of skipjack {CAA} based on 2 average {CAS} estimated during the 2004-2013 period (original and corrected ones), and assuming various levels of natural mortality at age. {I}t was first noticed that when the estimated {CAA} is showing a very low apparent total mortality between the various ages estimated by slicing (using the {E}veson & al 2014 growth curve), the life expectancy of tagged skipjack recovered is very short, showing an apparent total yearly mortality estimated at about 2.0. {A}s a result of this basic inconsistency between {CAA} and natural mortality, all {ASP} have been providing totally unrealistic results, estimating very low fishing mortality exerted at all ages. {A}n ad hoc analysis of the recovery data has been done, and it is showing that skipjack growth rates appear to be highly variable between individuals. {I}f this result is confirmed by further statistical analysis, it would mean that there is a very poor relationship between skipjack sizes and ages, medium & large sizes skipjack being probably dominated by young fast growing skipjack, while the old skipjack surviving in the population are probably rare. {T}his question is quite fundamental and its potential consequences in the functioning and results of the {SS}3 model should be carefully examined.},
  keywords = {{OCEAN} {INDIEN}},
  numero = {{IOTC}-2014-{WPTT}16-50},
  pages = {11},
  booktitle = {16{\`e}me groupe de travail sur les thons tropicaux},
  year = {2014},
  URL = {https://www.documentation.ird.fr/hor/fdi:010063742},
}