42 
Fishery Bulletin 11 7(1-2) 
A 
Number 
offish 
per study 
per month 
< 5 Fish 
x <10 Fish 
x <20 Fish 
x <30 Fish 
x >30 Fish 
Spawning 
probability 
0.00 
Figure 2 
Spawning seasonality of northern Gulf of Mexico female red snapper (Lutjanus campecha- 
nus), estimated from a monthly Gonadosomatic Index (GSI). (Al Colored lines show esti¬ 
mated monthly GSI, including 50% and 95% credible intervals. These time series predic¬ 
tions were estimated from GSI data across multiple studies from 1991 through 2002 and 
from 2009 through 2017. Each x represents the mean GSI value of a study at a particular 
month and year. The number of individual GSI measurements used to calculate these 
means is indicated by the gradation of darkness of the x’s. Red snapper are considered 
reproductively active when GSI > 1 (dotted line), and the time series line color indicates 
the estimated probability of spawning. The y axis is presented as a back-transformed log 2 
scale. (B) The estimated number of months with reproductively active female red snapper. 
