Submitted to: International Sustainable Marine Fish Culture Conference and Workshop Book of Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 9/10/2007
Publication Date: 10/15/2007
Citation: Ludwig, G.M., Lochmann, S.E. 2007. Production of sunshine bass fingerlings without using rotifers [abstract]. International Sustainable Marine Fish Culture Conference and Workshop: Book of Abstracts. p.9.
Technical Abstract: The accepted protocol for production of fingerling size sunshine bass in tanks included the feeding of rotifers for several days before the larvae were weaned to feed on Artemia nauplii. Maintaining rotifer cultures requires space, time, equipment, supplies, trained culturists and the cultures are often unstable. Elimination of the use of rotifers would greatly enhance the feasibility of reliable tank culture of fingerlings and should reduce its cost. This experiment was comprised of three treatments with three replicates per treatment: larvae fed standard size Artemia nauplii (0.48 mm X 0.19 mm), larvae fed microcyst Artemia nauplii (0.43 mm X 0.18 mm), and larvae fed rotifers (Brachionus plicatilis) (0.26 mm X 0.16mm) and weaned to standard size Artemia nauplii by 11 days post hatch (dph). Sunshine bass larvae, 4 dph, were stocked into 100 L tanks at 75 larvae/L. The initial daily feeding rates were 20 rotifers or nauplii/mL. That was increased to 20/mL, twice/d at 5 dph and then changed to 10/ml, twice/d at 6dph. The experiment lasted until 14 dph. At 14 dph, 4.3 % of the larvae fed only standard Artemia nauplii survived while significantly more, 43.0%, of those fed microcyst Artemia nauplii and 93.6% of those receiving rotifers and standard Artemia nauplii survived. At 14 dph, average standard lengths (7.26 mm) of larvae fed microcysts or rotifers and standard Artemia nauplii (7.13 mm) were both significantly longer than that of larvae receiving standard Artemia nauplii (6.86 mm). During previous experiments, larvae that were not fed had 0% to 0.01% survival by the end of 11 dph. This experiment is the first time that sunshine bass have been cultured to 14 dph while being fed Artemia nauplii but without being fed rotifers.