Food preference of Goldfish (Carassius auratus (Linnaeus, 1758)) and its potential in mosquito control
Sandipan Gupta, Samir Banerjee
Aquaculture Research Unit, Department of Zoology, University of Calcutta, 35, Ballygunge Circular Road, Kolkata –700019, West Bengal, India. E-mail: firstname.lastname@example.org
Abstract: Ornamental fishes are the most popular pets in present day world. Among these ornamental fishes, gold fish (Carrasius auratus) is the most admired ornamental fish through out the world and also in India.
Most of the fish farmers associated with ornamental fish trade in India are engaged in captive culture of gold fishes. Supply of suitable food during culture period is the most vital factor to achieve good growth and survival of gold fish, but proper knowledge regarding the most preferable food of gold fish is lacking. On the other hand, age-specific food preference in some fishes has been reported earlier. So, in the present study gold fish was selected to determine its food preference and experiment was also conducted to discern any age-specific food preference of gold fish. Previous works have considered gold fish as consumer of mosquito larvae but its potential as mosquito biocontrol agent has not been studied so far. So, the potential of gold fish as mosquito biocontrol agent was also studied.
From the experiment, it has been observed that gold fish has significantly higher preference for live food than artificial food, more preferably for chironomid larvae. Gold fish has significantly higher mosquito larvae consumption rate than same aged guppy and Aplocheilus sp. under same hydrological parameter was also observed.
So, from this study it can be concluded that supply of live food more preferably the chironomid larvae could be beneficial to get good growth and survival of gold fish in captive culture. As from this study it has also been observed that gold fish has significantly higher mosquito larvae consumption rate than popular larvivorous fishes, so in near future gold fish can not only be used as ornamental fish but also as an efficient mosquito biocontrol agent.
Key Words: Gold fish – different age groups – food preference – mosquito biocontrol