Appendix A. Table of covariates used in the modeling.
TABLE A1. List of variables used in the analysis of early lifestage abundances. Variables that were significantly affected by those listed in the first column are in bold in the third column (modeled variables) and those that were not affected are in regular characters.
Variable 
Definition 
Modeled variables 
Survey gear 

Natural logarithm of maturing capelin stock biomass. 
Cap^{0} 
Acoustic survey 

Natural logarithm of catch numbers of mature capelin. 
Cap^{0} 
Fisheries statistics 

Natural logarithm of capelin age0 abundance. 
Cap^{1} 
Pelagic trawl survey 

Mean length of capelin at age0. 
Cap^{1} 
Pelagic trawl survey 

Natural logarithm of capelin age1 abundance. 
Acoustic survey 


Natural logarithm of cod spawning stock biomass. 
Cod^{0} 
VPA estimate 

Mean age in cod spawning stock. 
Cod^{0} 
VPA estimate 

Natural logarithm of cod age0 abundance. 
Cap^{0}, Had^{0}, Her^{0}, Cod^{1}, Cap^{1}, Had^{1}, Her^{1} 
Pelagic trawl survey 

Mean length of cod at age0. 
Cod^{1} 
Pelagic trawl survey 

Natural logarithm of cod age1 abundance. 
Bottom trawl survey 


Catchability factor 
Cod^{1}, Had^{1} 
Bottom trawl survey 

Natural logarithm of haddock spawning stock biomass. 
Had^{0} 
VPA estimate 

Mean age in haddock spawning stock. 
Had^{0} 
VPA estimate 

Natural logarithm of haddock age0 abundance. 
Had^{1} 
Pelagic trawl survey 

Mean length of haddock at age0. 
Had^{1} 
Pelagic trawl survey 

Natural logarithm of haddock age1 abundance. 
Bottom trawl survey 


Natural logarithm of herring spawning stock biomass. 
Her^{0} 
SeaStar estimate 

Mean age in herring spawning stock. 
Her^{0} 
SeaStar estimate 

Natural logarithm of herring age0 abundance. 
Her^{1} 
Pelagic trawl survey 

Mean length of herring at age0. 
Her^{1} 
Pelagic trawl survey 

Natural logarithm of herring age1 abundance. 
Acoustic survey 


Center of gravity in NS direction of investigated species at age0. 
Cap^{1}, Cod^{1}, Had^{1}, Her^{1} 
Pelagic trawl survey 

Center of gravity in EW direction of investigated species at age0. 
Cap^{1}, Cod^{1}, Had^{1}, Her^{1} 
Pelagic trawl survey 

Natural logarithm of number of cod at age 3–6. 
Cap^{0}, Cod^{0}, Had^{0}, Her^{0}, Cap^{1}, Cod^{1}, Had^{1}, Her^{1} 
VPA estimate 

Natural logarithm of number of herring at age 1–5. 
Cap^{0}, Cap^{1} 
Acoustic survey 

Mean winter (Dec.March) temperature (^{o}C) 0–200m at the Kola section. 
Cap^{0}, Cod^{0}, Had^{0}, Her^{0}, Cap^{1}, Cod^{1}, Had^{1}, Her^{1} 
CTDdata 

Mean summer (JuneAug.) temperature (^{o}C) 0–200m at the Kola section. 
Cap^{0}, Cod^{0}, Had^{0}, Her^{0} 
CTDdata 