Derivation of economic values for production traits in aquaculture species

Table 6 Effect of genetic change on production results relative to the situation without genetic change

Trait	Genetic change (trait unit)	Δ Juveniles stocked (year⁻¹)	Δ Feed consumption (kg/year)	Δ Fish production (kg/year)	Δ Gross margin (€)
\(TGC\) ^a	+0.95	89,400	−68,409	36,309	213,131
\(TFC\) ^b	−0.55	0	−120,300	0	140,891
\(M\) ^c	−0.016	−137,294	−34,446	0	69,531
\(\sigma_{HW}\) ^d	−4.2	0	0	0	2636
\(\sigma_{HW}\)	−8.5	0	0	0	4952

^aThermal growth coefficient [\({\text{g}}^{2/3}\)/(day degrees · 1000)]
^bThermal feed intake coefficient [\({\text{g}}^{0.544}\) /(day degrees · 1000)]
^cMortality rate (%/day)
^dStandard deviation of harvest weight (g)

ISSN: 1297-9686