Sources of nutrition for larva and rotifer
There are two sources of nutrition for larval fish from enriched rotifers:
1. Digestible rotifer tissue – primarily the soft internal tissue of the rotifer, and
2. Gut-loaded feed released from the rotifer gut.
There are four stages (sources) of enrichment for the rotifer:
1. Pre-enrichment from the production feed
2. Primary enrichment to achieve:
- a. Optimal soft tissue nutritional profile:
b. Optimal feed profile of feed in the rotifer gut
3. Cold and warm storage feeding to maintain rotifer gut and soft tissue nutritional profile.
4. Greenwater feeding to maintain rotifer gut and soft tissue nutritional profile.
Optimal enrichment occurs when both rotifer soft tissue and the feed loaded gut match enrichment objectives for a specific species. In an ideal world, the typical profile for both soft tissue and the feed loaded gut would approximate the following table:
Table F.1 “Optimal” enrichment table of enriched rotifers for unspecified marine larva.
Numbers based on the best numbers available to RMI at this time. Intended for general discussion only. Optimum profile changes with species.