Triplicate groups of rainbow trout (Salmo gairdneri) fed six
diets; five based on fish protein concentrate (FPC) ranging in caloric
density from 4.36 to 6.19 kcal/g, and one based on vitamin free
casein with a caloric density of 5.26 kcal/g were evaluated with
respect to diet ingredient utilization. The parameters used to evaluate
efficiency of diet utilization were: feed conversion, energy and protein
conversion, and growth. The desirability of the edible portion of the
fish produced on the different treatments from a flavor and texture
standpoint was determined.
The protein level was maintained at 38% of the dry diet, with
7.8% supplied by gelatin and the remainder by either FPC or casein.
The herring oil levels of the diets ranged from 25% to 45% of the dry
diet, and was the primary source of calories. Alpha-cellulose was
included as a filler and ranged from 12.2% to 31.2% of the dry diet.
The FPC based diets produced statistically superior weight gains
when compared to the casein based diet. The efficiency of feed conversion
was improved as the level of herring oil was increased. The
energy and protein conversions were relatively constant for the FPC
based diets, with the casein based diet being lower (P < 0.05). / Graduation date: 1975
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/26963 |
| Date | 08 June 1975 |
| Creators | Kellems, Richard O. |
| Contributors | Sinnhuber, Russell O. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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