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Preliminary estimation of tropical ornamental fish metabolite production rates
- Source :
- Aquaculture. 110:263-269
- Publication Year :
- 1993
- Publisher :
- Elsevier BV, 1993.
-
Abstract
- The rational design of closed aquaculture systems requires data on metabolite production rates. The metabolite of primary concern is often ammonia. Ammonia formation rates for a number of tropical ornamental fish types and sizes were determined. Cyprinus carpio, Barbus conchonius, Pseudotropheus auratus and Carassius auratus auratus were used as representative egg-layers while Xiphophorus variatus and Xiphophorus helleri represented the live-bearers. Specific metabolite production rates, R′, were determined not only in terms of mass of fish but also the amount of feed. For instance, R′ (Amm-N) for 1.33 g unit size Barbus conchonius was determined to be 155.9 mg Amm-N kg-fish−1% feed−1 day−1. In an attempt to produce a general model for all the ornamental fish investigated, all values of R′ obtained were correlated with fish sizes to produce an equation R′ (Amm-N) = 1.57-[30×log(itUW)] where UW = unit fish size.
Details
- ISSN :
- 00448486
- Volume :
- 110
- Database :
- OpenAIRE
- Journal :
- Aquaculture
- Accession number :
- edsair.doi...........e5064704a1d98f4c0164ebc97501730d