A shrimp moults every 19–22 days and grows only during the soft-shell window. Diet has to deliver phospholipids at roughly the same PL:total-lipid ratio as the body itself — about 2:1 in Penaeus. Standard liquid lecithin runs 1.67:1 alone; blending GIIOFEED-P-S25 in at 1:7 lifts the diet to 2:1, matching body composition. The math below.
Penaeus vannamei post-larvae cannot synthesise phospholipids at the rate that rapid early-stage growth demands. The diet phospholipid:total-lipid ratio needs to approach the shrimp body composition itself (roughly 2:1 PL:glyceride in Penaeus). Liquid lecithin alone runs about 1.67:1 — close but short. Our recommended formulation blends GIIOFEED-P-S25 (de-oiled, PC >25%) with GIIOFEED-L at 1:7 by weight, which lifts the diet PL:glyceride ratio to ~2:1, matching shrimp body composition.
As the animal matures and the metabolic demand for dietary phospholipid drops, the diet matrix can switch to GIIOFEED-L (liquid lecithin) — which doubles as pellet-mill lubricant + emulsifier at the feed plant. Inclusion is usually stepped down through grow-out.
For seabass, sea bream, barramundi transitioning from live feed to formulated micro-diets, GIIOFEED-L supports the gut and lipid metabolism during the critical weaning window. Inclusion ranges issued with the TDS at sample dispatch.
Shrimp grow in pulses, not continuously. Each growth pulse happens during a moult, and a moult cycle runs 19–22 days. From hatch to a 20-gram market animal takes 140–160 days in a 28°C pond — roughly seven moults. Two things have to happen at every moult: the animal has to survive the energy-intensive shedding of its exoskeleton, and the animal has to recompose body tissue in the soft-shell window before it hardens up again. Both are bound by the same nutritional input: dietary phospholipid.
The reason is biology. Phospholipids form lipoprotein structures that transport body lipids during the high-energy moult phase; they are also the building block of new cell membranes laid down as the animal expands. Shrimp's own phospholipid synthesis capacity is not enough to supply this peak demand. Diet has to supply the deficit, and the cleanest way to see that is to look at body composition.
From thin-layer chromatography on Penaeus merguiensis, shrimp body lipid runs approximately 23.3% triglycerides + DG + MG + FFA, against 47.2% phospholipids — a PL:glyceride ratio of about 2.05 : 1. Body PL is more than double the neutral lipid pool. Liquid lecithin used alone supplies a PL:glyceride ratio of about 1.67 : 1 (62.5% PL vs 37.5% inherent acid oil). Close, but below body composition. Standard liquid lecithin alone undersupplies the active.
| Diet ingredient | Glycerides (g/100g) | Phospholipids (g/100g) | PL:Glyceride ratio |
|---|---|---|---|
| Shrimp body (Penaeus) | 23.3 | 47.2 | 2.05 : 1 |
| GIIOFEED-L (liquid lecithin) alone | 37.5 | 62.5 | 1.67 : 1 |
| GIIOFEED-P-S25 (de-oiled, PC >25%) alone | 3.0 | 97.0 | 32.3 : 1 |
| Composite: 1 part S25 + 7 parts liquid | 33.2 | 66.8 | 2.01 : 1 |
Body composition by TLC, shrimp breed Penaeus merguiensis. Product compositions are typical-batch values per our internal analytical sheets — published spec floors are 60% PL for GIIOFEED-L and 95% PL for GIIOFEED-P-S25; actual COA values run above the floor. The 1:7 composite at typical-batch values lands within rounding of body composition (2.01 vs 2.05); at spec floor it lands at ~1.81, still within practical range.
Add 1 kg of GIIOFEED-P-S25 on top of every 7 kg of GIIOFEED-L in your shrimp feed formulation.
A GIIAVA internal feeding trial (n = 15 per arm, 30 days, juvenile shrimp ~1g initial body weight) compared a control diet against a diet where the equivalent proportion of lipid was replaced with PC-25 de-oiled soy lecithin. Headline result: trial-arm shrimp reached an average final body weight of 2.51 g (143% gain) vs the control arm at 1.72 g (66% gain) over the same 30-day window. Diet lipid retention was elevated, with the phospholipid fraction in particular retained substantially better than the neutral lipid fraction. The result is internal pilot data, not a peer-reviewed publication — we share the full protocol and raw numbers with serious aquaculture customers on request, and we recommend running a structured trial on your own line and your own animals.
GIIOFEED-L and GIIOFEED-P-S25 are produced at our group's de-oiling plants in Jurong Island (Singapore) and Wai (Maharashtra, India) — together among the largest single-site lecithin de-oiling capacities in operation. Both sites carry FSSC 22000, Halal, and Kosher certification, and either can ship to most aquaculture customers in Asia, the Middle East, Europe, and the Americas with redundant supply continuity.
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