Chemical Characterization of Testes Meals Made from Alaska's Seafood Processing Byproducts |
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| Authors: | Sébastien Plante Scott Smiley Alexandra C M Oliveira David A J Stone Ronald W Hardy Peter J Bechtel |
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| Institution: | 1. Fishery Industrial Technology Center, University of Alaska, Fairbanks, School of Fisheries &2. Ocean Sciences , 118 Trident Way, Kodiak, AK, 99615, USA sebastien.plante@irzc.umcs.ca;4. Ocean Sciences , 118 Trident Way, Kodiak, AK, 99615, USA;5. Hagerman Fish Culture Experiment Station, University of Idaho , 3059F National Fish Hatchery Road, Hagerman, ID, 83332, USA;6. USDA-ARS, Subarctic Agricultural Research Unit, University of Alaska , Fairbanks, 245 O'Neill Bldg., Fairbanks, AK, 99775, USA |
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| Abstract: | ABSTRACT Our objective was to produce a unique feed ingredient from underutilized walleye pollock (Theragra chalcogramma) and pink salmon (Oncorhynchus gorbuscha) testes. Protein content in meals from both species (72% and 80%, respectively) were above the values found in high quality herring meals (～70%), but both were poor in some essential amino acids, e.g., methionine. Additionally, both were good sources of the amino acid taurine (1.7 and 2.2% of meal, respectively). Pollock meal was very rich in phospholipids (82% of total lipids) and in DHA (28 mg/g meal) and EPA (18 mg/g meal), indicating potential as an ingredient in larval starter diets. The purine contents in both pollock and salmon testes meals were more than 10 times the concentrations found in other fish byproducts or commercial fishmeals. The high concentrations of purines found in these testes, especially in the salmon meal, make it an ideal candidate for an immune system stimulant when added to dietary formulations. |
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| Keywords: | Walleye pollock pink salmon gonads milt fish meal purines |
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