Muin, Hasniyati and Alias, Zazali and Nor, Adibi Md. and Taufek, Norhidayah Mohd (2024) Co-cultured of red hybrid tilapia and Gracilaria changii (Gracilariaceae: Rhodophyta): Effects on water quality, growth performance and algal density. Phycologia, 63 (3). pp. 303-311. ISSN 0031-8884, DOI https://doi.org/10.1080/00318884.2024.2336876.
Full text not available from this repository.Abstract
We evaluated the potential for co-cultured of red hybrid tilapia with Gracilaria changii in two different densities in zero water exchange conditions. Five treatments were performed, consisting of three monoculture systems as controls: algae at two different densities (M1 and M2 with 1 g L-1 density and 3 g L-1 density, respectively) and fish without algae (Mfish). For comparison purposes, the other two treatments were co-cultured fish with algae at densities of 1 g L-1 (P1) and 3 g L-1 (P2). The effects of different culture systems and densities on the water quality, growth performance, nutrient content and C/N ratio of the algae were determined. During the experimental period, the dissolved oxygen (DO) and pH values in the algal tanks (monoculture and co-culture) were significantly higher than those in the Mfish tank. The ammonia and nitrate concentrations in P1 and P2 were significantly lower compared to initial measurements. The water parameters indicated that the algae improved the water quality of the culture system. Compared to the fish monoculture (Mfish), the fish grew better with algae (P1 and P2) maybe due to the more favourable water conditions in the tanks. On day 20, the algae growth rates in the co-culture tanks (P1 and P2) were significantly higher than those in the monoculture tanks. Additionally, P1 and P2 improved the nutrient composition and C/N ratio of the algae. This study found that although the co-culture system resulted in better water quality and nutrient content in the alga, the algal density had no significant effect on fish or algal growth.
| Item Type: | Article |
|---|---|
| Funders: | Ministry of Higher Education Malaysia through the Fundamental Research Grant Scheme (FRGS/1/ 2019/WAB01/UM/02/3) |
| Uncontrolled Keywords: | Algal biomass; Freshwater fish; Nutrient content; Polyculture; Red algae |
| Subjects: | Q Science > QH Natural history Q Science > QH Natural history > QH301 Biology |
| Divisions: | Faculty of Science > Institute of Biological Sciences Institute of Advanced Studies |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 08 Oct 2024 07:13 |
| Last Modified: | 08 Oct 2024 07:13 |
| URI: | http://eprints.um.edu.my/id/eprint/45317 |
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