SINTEF Fiskeri og havbruk AS 1 Yngelfôr til torsk Kan vi erstatte levendefôr med nytt formulert fôr nå? Jose Rainuzzo Seniorforsker SINTEF Fiskeri og Havbruk

SINTEF Fiskeri og havbruk AS 2 I hvilke stadier vil vi erstatte levendefôr med formulert larve-fôr ? Fra dag 0 ? (fullt erstatting av levendefôr?) Delvis erstatting i rotatorie periode? Delvis erstatting i Artemia periode? Fullt erstatting i Artemia periode?

SINTEF Fiskeri og havbruk AS 3 Feeding regime for cod larvae Hatching Day 0 Day 5Day 30Day 15Day 45 Micro- algae Rotifers (Brachionus) Artemia Formulated feed Broodstock Controlled spawning Drawing : K I Reitan

SINTEF Fiskeri og havbruk AS 4 Artificial diets (or formulated diets) These diets offer the following advantages compared to live food: * Availability - constant and unlimited * Composition – controllable and consistant * Size – controllable * Storability – ready to use anytime * Cost – lower than mainting a live feed culture

SINTEF Fiskeri og havbruk AS 5 Disadvantages of artificial feeds - Attractiveness (it may be limited) - Distribution in water column (it may be not ideal) - Nutritional composition (must match larval requirement) - Stability in larval tanks (not as good as live feed) - Digestibility by the larvae (it may vary with larvae species)

SINTEF Fiskeri og havbruk AS 6

7

8 Growth (as dry weight)

SINTEF Fiskeri og havbruk AS 9 Specific growth rate

SINTEF Fiskeri og havbruk AS 10

SINTEF Fiskeri og havbruk AS 11 Survival at day 32

SINTEF Fiskeri og havbruk AS 12 Tørrvekt (mg/larve) Rotatorier Artemia, Copy feed eller Gemma micro 150 Gemma micro 300

SINTEF Fiskeri og havbruk AS 13 Overlevelse ved dag 39 K,A og B: 4 tanker C og G: 3 tanker Det er ikke tatt hensyn til klekkeprosent

SINTEF Fiskeri og havbruk AS 14 Veksthastighet

SINTEF Fiskeri og havbruk AS 15 Veksthastighet i rotatorieperioden (dag 2-17), Artemia/Copyfeed/GM150 –perioden (dag 17-30) og i Gemma micro 300 perioden (dag 30-39)

SINTEF Fiskeri og havbruk AS 16 Can we substitute live feed with artificial formulated feed for cod rearing? Partially yes But: still rotifers are necessary (Artemia maybe substitute partially or totally depending of feeding regime) still an excellent/ very good/ good live feed quality will be superior to any commercial larval feed that exist in the market artificial larval feed will be equal or even superior to a medium/ bad quality live feed.

SINTEF Fiskeri og havbruk AS 17 Perpectives Can we elaborate an artificial formulated larval feed that can substitute partially or totally rotifers for cod rearing ? YES

SINTEF Fiskeri og havbruk AS 18 But How ? We need research for : New ingredients New formulations feed formulation Nutritional studies, Enzymatic studies, Digestive studies Physico-chemical studies ( also in larval vessels) Optimization of feeding regimes