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

Document Type : Research Paper

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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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Iranian Scientific Fisheries Journal
Volume 29, Issue 1
March and April 2020
Pages 165-168

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