Figure 1.
Figure of the study area (black box) in the Western Mediterranean Sea.
The 200 and 1000
Figure 2.
Composite maps of anchovy female biomass estimated from PELMED acoustic surveys.
The color-scale shows the relative biomass in metric tonnes.
Figure 3.
Composite maps of anchovy eggs in early stages (age close to 0 hours) collected using a CalVET net during DEPM surveys in 2007 (on the left) and 2008 (on the right).
The color-scale shows the relative abundance in eggs/m.
Figure 4.
Conceptual diagram of the SEIBM.
Input data, type of experiments, modeled variables and Individual based model for anchovy in NW Mediterranean coupled to an hydrodynamic model.
Figure 5.
Simulated horizontal distributions of anchovy larvae at 14 mm from the SEIBM in RandomDist and RealDist experiments.
The two plots on the top are the output of RandomDist and RealDist experiments establishing the spawning date at of June 2007; on the bottom, establishing the spawning date at
of June 2008. The type of experiment is indicated in the upper left corner of each map. The color-scale represents larval density. The pre-recruitment zones are numbered: 1- GoL East, 2- GoL West, 3- Palamós, 4- Barcelona, 5- Ebro delta, 6- GV and 7- Balearic Islands.
Table 1.
Adult reproductive parameters of anchovy obtained with the application of the DEPM in different regions (Somarakis et al., 2004, and MPOCAT 2007 and 2008 data).
Table 2.
Length weight relationship for female anchovy from biological sampling during the acoustic surveys PELMED 2004–2010.
Table 3.
The spawners location effects on the horizontal transport.
Figure 6.
Larvae transported to each nursery area in the RandomDist (gray bars) and RealDist (blue bars) experiments for each year.
The y axis represents the percentage of pre-recruited larvae. The categories in x axis are the pre-recruitment areas. Percentages above 3.0% are indicated in the bars.
Figure 7.
Summer composites of surface Chlorophyll-a (, Modis Aqua, NASA,
) in the Gulf of Lions for the 2002–2010 period.
Figure 8.
Linear model to relative batch fecundity.
Table 4.
Summary of the linear model between relative batch fecundity (dependent variable, number of eggs per batch) and female weight (in g) from available DEPM data collected from 21 surveys between 1987 and 2008.
Figure 9.
Female and total biomass in GoL from 2003 to 2010.
The blue line corresponds to the total biomass estimated from acoustic surveys by IFREMER. The red and green lines correspond to the total and female biomass predictions from GAMs, respectively. The inverted triangles are the total biomass estimated from DEPM surveys by CSIC-ICM.
Table 5.
Statistics of the parsimonious GAMs applied to the acoustic survey data for the dependent variable “Female biomass” and analysis of deviance for GAMs covariates and their interactions of the final model fitted.
Figure 10.
Output maps from Generalized Additive Models (GAMs) predicting the daily egg production in the whole grid per year from the PELMED and available fecundity data.
The predictions were returned on the scale of the response with approximate standard errors. The color-scales represent number of eggs per .
Figure 11.
Interannual (2003–2009) mean of density of eggs at spawning time in the Gulf of Lions from GAMs.
The color-scales represent number of eggs. The spawning zones are numbered: 1- GoL East and 2- GoL West and the 250 m isobath is represented.
Table 6.
Statistics of the parsimonious GAMs applied to the acoustic survey data for the dependent variable “Egg production” and analysis of deviance for GAMs covariates and their interactions of the final model fitted.