Nematodes Can Substitute in a Co-Feeding Regime for Pacific White Shrimp Post-Larvae Reared in a Biofloc Nursery System.

This study evaluated nematodes as an alternative to live when provided in a co-feeding regime to Pacific white shrimp () post-larvae (PL) reared in a biofloc nursery system. A 20-day experiment employing PL was performed for an evaluation of four dietary groups: control [C] (fed exclusively with a dry commercial feed); artificial [AA] (dry feed composed of extracted and processed cysts and dry commercial feed); live and dry commercial feed [LA]; and nematodes and dry commercial feed [N] ( sp. dry nematodes).

Impact of arachidonic acid enrichment of live rotifer prey on bacterial communities in rotifer and larval fish cultures.

Rotifers (Brachionus plicatilis), commonly used at first feeding in commercial fish hatcheries, carry a large bacteria load. Because they are relatively poor in essential fatty acids, it is common practice to enrich them with fatty acids, including arachidonic acid (AA). This study aims to determine whether prey enrichment with AA may act as a prebiotic and modify the microbial community composition either in AA-enriched rotifer cultures or in larval-rearing water using winter flounder (Pseudopleuronectes americanus) as a larval fish model.