Effect of the inclusion of Azolla filiculoides meal on the growth and survival of red tilapia small fish (Oreochromis mossambicus x O. niloticus)
Article Sidebar
Main Article Content
Abstract
An experiment in Acuipaso Station, Granma province, Cuba was carried out to evaluate the effect on growth and survival indicators of inclusion levels (0, 10, 20 and 30 %) of water fern meal (Azolla filiculoides) in diets for red tilapia hybrid small fish (Oreochromis mossambicus x O. niloticus). A completely randomized design with four treatments and three repetitions was used; 120 small fish of 26 days of age were used, which were distributed in four groups of 30, ten small fish per tank (each tank represented a repetition). The chemical composition of meal was determined, and the variables: survival, weight and its increase, average gain and feed conversion factor were studied. The simple classification
variance analysis was performed on the data obtained and it the Duncan test was used to compare the means. The chemical composition reported percentages of CP (20.74), CF (19.34) and adequate amino acid balance (1.40, 2.30, 2.65 and 3.14 % of methionine, arginine, lysine and valine, respectively); the oxygen, temperature and pH of the water (5.34 mg/L, 24.33°C and 8.02) were maintained at the optimum average value for this species. For the indicators of growth and survival there were significant
differences (p <0.05) between all the treatments, except for the control and 10 % with results of 6.556g, 7.793 g/day, 1.85 g/g, 0.55 and 7.266 cm , for the final live weight, ADG, conversion, food efficiency and final length, respectively. It was concluded that Azolla filiculoides have an adequate chemical and amino acid composition so that it could be used in the feeding of red tilapia small fish, with 10 % of inclusion in the diet, results in accordance with the control diet were obtained in the productive indicators, without affecting the water quality.
Key words: Azolla meal, red tilapia, average daily gain, conversion and food efficiency
Article Details
Those authors that have publications with this journal accept the following terms:
1. They will retain their copyright and guarantee the journal the right of first publication of their work, which will be simultaneously subject to the License Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) that allows third parties to share the work whenever its author is indicated and its first publication this journal. Under this license the author will be free of:
- Share — copy and redistribute the material in any medium or format
- Adapt — remix, transform, and build upon the material
- The licensor cannot revoke these freedoms as long as you follow the license terms.
Under the following terms:
- Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- NonCommercial — You may not use the material for commercial purposes.
- No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
2. The authors may adopt other non-exclusive license agreements to distribute the published version of the work (e.g., deposit it in an institutional telematics file or publish it in a monographic volume) whenever the initial publication is indicated in this journal.
3. The authors are allowed and recommended disseminating their work through the Internet (e.g. in institutional telematics archives or on their website) before and during the submission process, which can produce interesting exchanges and increase the citations of the published work. (See the Effect of open access).