Development of Cost-Effective Low-Pollution Feeds for
Davis, D.A. and Arnold, C.R.
Marine Fisheries Service, Southeast Region, 9721 Executive
Center Drive, North, St. Petersburg, FL 33702.
PHONE: (813) 570-5324
This work was
designed to advance environmentally sound aquaculture
through the development of low-pollution feeds for the
commercial production of Sciaenops ocellatus
and Penaeus vannamei. The first approach sought
to reduce waste production by enhancing digestion of feed
ingredients. This research evaluated two feed supplements
(a protease and an acidifying agent with pro-biotic properties)
for their effect on apparent protein digestibility (APD)
values for Sciaenops ocellatus and Penaeus
vannamei. Although the responses were different,
protein digestibility values were increase by 6.7 and
12.7% through the addition of an acidifying agent in fish
feeds and the protease in shrimp feeds, respectively.
The second approach was to optimize the lipid component
of a previously developed nutrient dense diet, designed
for Sciaenops ocellatus juveniles, and to further
optimize nutrient retention and minimize the deposition
of intraperitoneal fat. For this research varying levels
of menhaden fish oil (MFO) and medium chain triglycerides(MCT)
were evaluated as energy sources in a basal diet containing
44% protein and 5.7% lipid. The supplementation of an
additional 3% MFO was required for maximum growth and
feed utilization; however, higher levels did not effect
growth or feed utilization but facilitated lipid deposition
in the fish.