Nitrogen excretion patterns and postprandial ammonia profiles in Black Sea turbot under Controlled conditions

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dc.contributor.authorYigit, Murat
dc.contributor.authorErdem, Muammer
dc.contributor.authorAral, Orhan
dc.contributor.authorKaraali, Burcu
dc.date.accessioned2012-01-19T20:15:47Z
dc.date.available2012-01-19T20:15:47Z
dc.date.issued2005
dc.description.abstractMeasurements of the rate of nitrogenous excretion were carried out in two batches of young Black Sea turbot (small 42 g, large 72 g) at 12±1°C under natural light conditions (10 h light:14 h dark and 13 h light:11 h dark, respectively). The ammonia nitrogen excretion rates of fish starved for 48 hours were 0.20±0.05 mg-N for the small fish and 0.18±0.09 mg-N/100g fish/h for the large. Fish were then fed a pellet diet containing 8.3% nitrogen at average rations of 0.67% and 0.59% of the body weight, respectively, for four days. On the fourth day, ammonia nitrogen excretion rates were evaluated. In both batches, the rates were 2-3 times higher immediately after feeding than in the starved fish, reaching a peak 3-6 hours after feeding and declining after- wards. For the small and large fish, respectively, 21% and 20% of the consumed nitrogen was excreted as ammonia nitrogen, 6% and 7% as urea nitrogen, and 8% and 4% as feces nitrogen within 24 hours after feeding.
dc.format.extent10 pages
dc.identifier.citationYigit, M., Erdem, M., Aral, O., & Karaali, B. (2005). Nitrogen excretion patterns and postprandial ammonia profiles in Black Sea turbot under Controlled conditions. The Israeli Journal of Aquaculture - Bamidgeh, 57(4), 231-240.
dc.identifier.issn0792-156X
dc.identifier.urihttp://hdl.handle.net/10524/19150
dc.publisherIsraeli Journal of Aquaculture - BAMIGDEH
dc.relation.ispartofseriesThe Israeli Journal of Aquaculture - Bamidgeh
dc.subjectammonia, Black Sea turbot, intensive fish culture, nitrogen excretion, Scophthalmus maeoticus
dc.subject.lcshFish culture--Israel--Periodicals.
dc.subject.lcshFish culture--Periodicals.
dc.subject.lcshAquaculture--Israel--Periodicals.
dc.subject.lcshAquaculture--Periodicals.
dc.titleNitrogen excretion patterns and postprandial ammonia profiles in Black Sea turbot under Controlled conditions

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IJA Volume 57, Issue 4, 2005