TY - JOUR
T1 - The importance of n-3 highly unsaturated fatty acids for growth in larval Sparus aurata and their effect on survival, lipid composition and size distribution
AU - Koven, W. M.
AU - Tandler, A.
AU - Kissil, G. Wm
AU - Sklan, D.
PY - 1992/6/1
Y1 - 1992/6/1
N2 - The effect of feeding Artemia nauplii containing different levels of n-3 HUFA on growth, survival and size distribution was tested in 22-36-day Sparus aurata larvae. Five treatments were prepared by feeding 24-h-old nauplii various percent ratios (0:100, 10:90, 25:75, 50:50, 75:25) of a commercial emulsion (high in n-3 HUFA) and a soybean oil-egg yolk emulsion (3:1 preparation, deficient in n-3 HUFA). Each treatment had five replicates and provided the following n-3 HUFA levels in Artemia: 2.6, 7.4, 12.3, 18.8, 29.8 mg/g DBW nauplii. Dietary n-3 HUFA showed a linear correlation (P < 0.01) with larval relative growih rate (RGR), length and final tank biomass. Fish fed the highest level of n-3 HUFA demonstrated an RGR (86.4%) and final tank biomass (30.9 g wet wt) that was more than double the values exhibited by fish fed the lowest n-3 HUFA diet (39.9%, 14.0 g wet wt, respectively). Survival, in contrast, was not linearly correlated with dietary n-3 HUFA although there was a significant survival (P < 0.05) effect between the n-3 HUFA poorest diet and the majority of remaining treatments. The lesser n-3 HUFA diets (2.6, 7.4 and 12.3 mg/g DBW) nauplii produced larval populations consisting mainly of small fish (6.9 mg ± 1.9) while n-3 HUFA rich diets (18.8 and 29.8 mg n-3 HUFA/g DBW nauplii) increased the fraction of larger larvae (23.0 ± 6 mg). The level of n-3 HUFA (mg/g DBW) in larval phospholipid was highly influenced by the content of these fatty acids in the diet. However, the phospholipid n-3 HUFA levels (mg/g DBW) in larvae fed the same diet were similar regardless of fish size. Finally, by examining different size larvae in groups under the various n-3 HUFA treatments, this study found that the inverse relationship between larval lipid and moisture was a function of growth rate and not dietary n-3 HUFA.
AB - The effect of feeding Artemia nauplii containing different levels of n-3 HUFA on growth, survival and size distribution was tested in 22-36-day Sparus aurata larvae. Five treatments were prepared by feeding 24-h-old nauplii various percent ratios (0:100, 10:90, 25:75, 50:50, 75:25) of a commercial emulsion (high in n-3 HUFA) and a soybean oil-egg yolk emulsion (3:1 preparation, deficient in n-3 HUFA). Each treatment had five replicates and provided the following n-3 HUFA levels in Artemia: 2.6, 7.4, 12.3, 18.8, 29.8 mg/g DBW nauplii. Dietary n-3 HUFA showed a linear correlation (P < 0.01) with larval relative growih rate (RGR), length and final tank biomass. Fish fed the highest level of n-3 HUFA demonstrated an RGR (86.4%) and final tank biomass (30.9 g wet wt) that was more than double the values exhibited by fish fed the lowest n-3 HUFA diet (39.9%, 14.0 g wet wt, respectively). Survival, in contrast, was not linearly correlated with dietary n-3 HUFA although there was a significant survival (P < 0.05) effect between the n-3 HUFA poorest diet and the majority of remaining treatments. The lesser n-3 HUFA diets (2.6, 7.4 and 12.3 mg/g DBW) nauplii produced larval populations consisting mainly of small fish (6.9 mg ± 1.9) while n-3 HUFA rich diets (18.8 and 29.8 mg n-3 HUFA/g DBW nauplii) increased the fraction of larger larvae (23.0 ± 6 mg). The level of n-3 HUFA (mg/g DBW) in larval phospholipid was highly influenced by the content of these fatty acids in the diet. However, the phospholipid n-3 HUFA levels (mg/g DBW) in larvae fed the same diet were similar regardless of fish size. Finally, by examining different size larvae in groups under the various n-3 HUFA treatments, this study found that the inverse relationship between larval lipid and moisture was a function of growth rate and not dietary n-3 HUFA.
UR - http://www.scopus.com/inward/record.url?scp=0027042532&partnerID=8YFLogxK
U2 - 10.1016/0044-8486(92)90140-G
DO - 10.1016/0044-8486(92)90140-G
M3 - Article
AN - SCOPUS:0027042532
SN - 0044-8486
VL - 104
SP - 91
EP - 104
JO - Aquaculture
JF - Aquaculture
IS - 1-2
ER -