At Great Bay Aquaculture in the US larvae of summer flounder Artemia was replaced from their feed.
Press communiqué states that there was a hatchery trial at GreatBay Aquaculture in the US larvae of summer flounder were weaned onto manufactured feed by day 24, without Artemia. The result is that it drastically cuts weaning time for summer flounder. This is close to half the usual time. The trial used Skretting’s latest Gemma Micro formulation.
According to the information Gemma Micro has pre-digested proteins and phospholipids and a blend of marine micro algae that gives the feed its striking green colour. Conventionally, larvae of marine species such as flounder are first fed with live feed, rotifers then Artemia, before being weaned onto manufactured feed. For summer flounder at GreatBay Aquaculture this is at day 40.
Brian Gennaco, Hatchery Manager of GreatBay Aquaculture throws light by saying that the experiments were highly impressed with the speed at which the flounder transitioned onto the new diets. The overall pigmentation, growth, and quality of the flounder exceeded our expectations. The elimination of Artemia in this trial has significantly reduced the work load of the live feed staff.
Nick King of Skretting supervised the trial, said that as larvae began taking the feed, rotifer feeds were progressively eliminated. In two days all larvae were readily taking Gemma Micro so we shortened the weaning time to five days. The larvae were completely weaned by day 24. The usual 40 days in this hatchery is already far earlier than many flatfish hatcheries.
