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The effect of Daphnia pulex enriched with various dietary rations on the growth and survival rates of Swordtail fish (Xiphophorus helleri) and Guppy (Poecilia reticulata) larvae
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T. Enayat Gholampour   1, M. Pouladi2 , E. Sotoudeh3 , S.A.A. Hedayati2 |
1- Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
2- Department of Aquatic Production and Exploitation, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran.
3- Department of Fisheries, Faculty of Agriculture and Natural Resources, Persian Gulf University, Bushehr, Iran. |
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Abstract: (4419 Views) |
In this study, specific weight and length growth and survival rates of Swordtail fish (Xiphophorus helleri) and Guppy (Poecilia reticulata) larvae using three feeding treatments including Daphnia pulex+O. africanum, D. pulex+O. africanum+Canola oil and D. pulex+Oscillatoria africanum+Fish oil were investigated. The results showed that the mean (±SE) specific growth rate of Guppy fish larvae were 6.11±0.9, 5.84±1.4 and 5.6±1.2 g and for Swordtail fish larvae were 2.3±0.4, 4.14±1.7 and 4.5±0.8 g, respectively. Also, the specific length growth rates of Guppy fish larvae were 1.2±0.35, 1.4±0.25 and 1.1±0.3 cm and for Swordtail fish larvae were 1.8±0.3, 2.4±0.45 and 2.6±0.6 cm, respectively. The survival rate (%) of Swordtail fish larvae were 35.33, 41.11 and 46.62% while for Guppy fish larvae were 46.12, 81.41 and 94.63%, respectively.
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| Keywords: Ornamental fish larvae, Daphnia pulex, Oscillatoria africanum, Fish oil, Canola oil |
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Full-Text [PDF 341 kb]
(959 Downloads)
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Type of Study: Research |
Subject:
تغذيه
Received: 2019/02/12 | Accepted: 2019/08/19 | Published: 2020/04/21
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