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Journal of Fisheries and Aquatic Science
  Year: 2009 | Volume: 4 | Issue: 2 | Page No.: 103-110
DOI: 10.3923/jfas.2009.103.110
 
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Evaluation of Antifungal Activity of New Combined Essential Oils in Comparison with Malachite Green on Hatching Rate in Rainbow Trout (Oncorhynchus mykiss) Eggs

S.M. Mousavi, S.S. Mirzargar, H. Ebrahim Zadeh Mousavi, R. Omid Baigi, A. Khosravi, A. Bahonar and M.R. Ahmadi

Abstract:
The aim of this study was introducing a new herbal constitution for malachite green in hatcheries. In this study, antifungal activities of a new Combination of Essential Oils (CEO) from the herbs; Thymus vulgaris, Salvia officinalis, Eucalyptus globulus and Mentha piperita in Oncorhynchus mykiss eggs and its effects on hatching rate in comparison with malachite green (a specific treatment for the control of saprolegniasis) were studied. After fertilization, eggs were transferred to incubators and then treated with five concentration of the combined essential oils with concentrations: 10, 50, 100, 150 and 200 ppm, respectively and malachite green (1 ppm) using constant flow treatment method for incubation period. One incubator was as control without any treatment The water quality factors were controlled over the study period. In the end of hatching rate, the mold infection and hatching rate were calculated. The hatching percentage in five treatment groups of CEO were 69.99% at 10 ppm, 63.61% at 50 ppm, 62.1% at 100 ppm, 60.53% at 150 ppm, 54.63% at 200 ppm, 60%. 83 at 1 ppm of malachite green group and 53.48% in control group, respectively. The results revealed significant antifungal effects of the combined essential oils in comparison with malachite green on fish eggs so that it could decrease mold infection and increase hatching rate on concentration 10 ppm (p < 0.05). This indicated that this combination of essential oils may be a promising antifungal agent in aquaculture.
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How to cite this article:

S.M. Mousavi, S.S. Mirzargar, H. Ebrahim Zadeh Mousavi, R. Omid Baigi, A. Khosravi, A. Bahonar and M.R. Ahmadi, 2009. Evaluation of Antifungal Activity of New Combined Essential Oils in Comparison with Malachite Green on Hatching Rate in Rainbow Trout (Oncorhynchus mykiss) Eggs. Journal of Fisheries and Aquatic Science, 4: 103-110.

DOI: 10.3923/jfas.2009.103.110

URL: https://scialert.net/abstract/?doi=jfas.2009.103.110

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