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Comparison of nutrient losses into the water from rainbow trout culture based on fresh Baltic herring, moist and dry diets


Comparison of nutrient losses into the water from rainbow trout culture based on fresh Baltic herring, moist and dry diets



Aquaculture International 6(6): 441-450



ISSN/ISBN: 0967-6120

DOI: 10.1023/a:1009283401505

The nutrient losses into the water from rainbow trout (Oncorhynchus mykiss) cage culture using locally caught low-fat Baltic herring, herring-based moist diets and fishmeal-based dry diets were estimated. Feeding with herring led to nitrogen and phosphorus losses into the water twice as high as those that resulted from feeding with dry pellets (78-162 versus 37-39 g N and 15-39 versus 7-18 g P per kg growth). This was supported by direct measurements of ammonia and phosphate excretion.

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