INFLUENCE OF CERTAIN HERBAL ADDITIVES ON THE GROWTH SURVIVAL AND DISEASE RESISTANCE OF GOLDFISH, CARASSTUS AURATAS (LINNAEUS)
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Date
2010-02
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Fisheries College and Research Institute, Thoothukudi, Tamilnadu Dr.J.Jayalalitha fisheries University, Nagappatinam
Abstract
The ornamental fish trade earns foreign exchange, besides serving as a source of employment. Appllication of medicinal herbs in aquaculture is gaining success. Recently use of medicinal plant is considered as an alternative to antibiotics in fish health management The present investigation was designed to study the influence of two herbal additives viz., Phyllanthus niruri and Aloe vera on the growth and disease resistance in goldfish, Carassius auratus. The experiment was conducted with the adult fishes for a period of 60 days. After the 60 days of the experiment, fish of each treatment were challenged by pathogenic Aeromonas hydrophila which was given by intraperitoneal injection and kept under observation for 10 days to record clinical signs and the daily mortality rates. Phyllanthus, at 1.5 percent
concentration yielded highest mean weight gain ( 1.769 g) followed by aloe which recorded a mean weight gain of 1.389 g at 1.0 percent concentration. The highest survival rate (80 Vo)
was observed in aloe fed group at 1.5 per cent concentration followed by Phyllanthus (70Vo) at 1.5 per cent concentration. These results indicate that the addition of herbal additives can promote growth and can prevent disease in goldfish farming.
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