Effect of fermented aquatic macrophytes supplementation on growth performance, feed efficiency and digestibility of Nile Tilapia (Oreochromis niloticus) juveniles fed low fishmeal diets.

Cruz Velasquez, Y., Kijora, C., Wuertz, S. and Schulz, Carsten (2015) Effect of fermented aquatic macrophytes supplementation on growth performance, feed efficiency and digestibility of Nile Tilapia (Oreochromis niloticus) juveniles fed low fishmeal diets. Livestock Research for Rural Development, 27 (9).

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Abstract

An 8-week feeding experiment was conducted to evaluate the growth performance, feed efficiency, digestibility, carcass composition and, liver and intestine histology of juvenile Nile Tilapia (3.18 ± 0.02 g) fed on a control diet and four experimental diets (35% CP). The experiment aimed to assess the utilization of local macrophytes; namely fermented duckweeds at 15% (DW15) and 25% (DW25) as well as fermented water fern at 15% (WF15) and 25% (WF25).
The growth performance comprising of weight gain (WG), specific growth ratio (SGR) and protein efficiency ratio (PER) was assessed in triplicates and no significant differences between diets were observed. Feed conversion ratio (FCR) and ash content of the carcass were similar in all the treatments except for WF25 where significantly higher FCR and ash content were recorded compared to the control diet. However, lipid and protein content of the carcass was comparable between diets. Results showed that the inclusion of fermented duckweeds up to 25% and fermented water fern up to 15% in diets for Nile Tilapia was feasible without any negative effect compared to the control group.

Document Type: Article
Keywords: duckweed, histology, plant ingredients, water fern
Research affiliation: Kiel University > Kiel Marine Science
OceanRep > The Future Ocean - Cluster of Excellence
Kiel University
Refereed: Yes
Open Access Journal?: Yes
ISSN: 0121-3784
Projects: Future Ocean
Date Deposited: 02 Feb 2018 12:51
Last Modified: 21 Jun 2019 12:43
URI: http://oceanrep.geomar.de/id/eprint/41818

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