Comparative Study of the Buoyancy and Stability of Two Pelleted and Extruded Rainbow Trout Feeds for to Improve Water Quality

Citation: Aba Mustapha, "Comparative Study of the Buoyancy and Stability of Two Pelleted and Extruded Rainbow Trout Feeds for to Improve Water Quality", Universal Library of Advances in Agriculture, Volume 02, Issue 01.

Copyright: This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This research evaluates the effect of processing and feed formulation on fish feed properties with the aim of providing information on physical properties of the feed and their impact in water environment. The physical quality of feed fish is important in aquaculture given its susceptibility to pellet degradation and leaching nutrients, the pollution of environment which causes fish stress and the development of pathogenic diseases. The objective of this study was to evaluate the Buoyancy and stability of on the physical properties of of extruded and pelleted rainbow trout feed with different formulations. Feed pellet floatability and stability were recorded every five minutes. Results showed that Highest feed pellet buoyancy was recorded in extruded diet and least in pelleted diet that the difference is significant. Feed processing (pelleting or extrusion) significantly affected feed buoyancy (P<0.05), the highest water buoyancy was noted with respectively 72,57 ± 3,31 for the extruded diet and 48,04 ± 1,42 for pelleted diet after 30 minutes in water. There was also a difference in the water stability of the extruded diet and pelleted diet, had the highest water stability (77,56 ± 1,19 and 17,43 ± 1,78b respectively) after 60 minutes of exposure to water. The effect of extrusion had an effect on the buoyancy and stability of the feed, and the fat content had a major impact on the buoyancy of the fat-rich extruded feed. With salmonid aquaculture developing, so have concerns regarding the environmental impacts caused by the rainbow trout’s feed, in particular, the buoyancy and stability of fish feed and the possibility of environmental damage. The improving of these physical qualities at production levels, contributes more to food efficiency, and feed quality of aquafeeds could reduce waste and consequent environmental impacts, for better water quality for rainbow trout.

Keywords: Aquafeed, Buoyancy, Stability, Extrusion, Pelleting, Quality, Water.

https://doi.org/10.70315/uloap.ulaag.2026.0201002