1. SCRS SKIPJACK Report 2007

2. Baitboat
Purse seiner
Spatial distribution of the SKJ catches during the period ( ) for the main fisheries and fishing gears in the Atlantic ocean.

3. t t t t

4. Eastern Atlantic SKJ EU purse seiners FADs Free school
Azorean baitboats
Dakar based baitboats

5. Eastern Atlantic SKJ Regular decrease in mean weight
(dominated by PS catches) until 1995
and logically regular increase in total mortality (based on Length data) until but followed by a dramatic decline : moratorium effect ? decrease in fishing effort ?
Z = K*( L∞ -L moy) / (L moy - L c)
under …. equilibrium conditions

6. Western Atlantic SKJ
Recent unexplained decline of Venezuelan PS CPUE, while Brasilian BB CPUEs remain “stable”
Different patterns observed for mean weight
Venezuelan PS index decreases continuously,
while Brazilian BB index drop only in 2004
But … US LL index
increases slowly

7. Fishery indicators
1969
1971
1973
1975
1977
1979
1981
1983
1985
1987
1989
1991
1993
1995
1997
1999
2001
2003
2005
Eastern Catch + = -
Z lenght
Mean Weight
Skewness Ind.
R. Rate Catch In.
Moratorium
Car. Capac. EU PS
1*1 SKJ Catch
Western Catch

8. See you next year for my stock assessment ?
YES, some guys at Corazon de Maria have proposed to evaluate how many skj we are !, how many time we move from the meeting room to the cafeteria, whether the famous FADs in Madrid (i.e., Museo del Jamon, El abuelo, etc) are still attractive for ICCAT scientists …., well you know all types of information very useful for playing with MULTIFAN CL !.
CAUTION! Attending a SKJ assessment meeting is not dangerous and not cause irreversible eye damage
It has been evidenced (by a Bayesian Approach) that the SKJ Rapporteur had to wear glasses BEFORE he started to work with this species.