Coloration is one essential sales factor deciding the market value of ornamental fish. In ornamental fish trading of faded fish fails to create interest of the buyers. In the present study, we noted that turmeric mixed fish feeds can promote carotenoid pigment deposition on the fantail of guppy Poecilia reticulata. Carotenoid content of the caudal fin and muscle of the fish and specific growth rate (SGR) were also analyzed. Results showed that there is a significant difference in the increment (P<0.01) of the carotene content of fin and muscle. Our results in the fresh fish further showed that the turmeric powder at a concentration of 45mg/50gm of fish feed shows highest pigment concentration in caudal fin and muscle of the fish and better SGR.
The commercial value of ornamental fish is primarily dependent on their external body colouration. Fade coloured fish fails to attract the interest of the buyers. In the present study an experiment were conducted to evaluate the efficacy of four types of feed (Living tubifex, Dried tubifex, Dried Daphnia and Prepared granulated feed) in the rearing of fantail guppy. Carotenoid content of the feed used, caudal fin and muscle of the fish and specific growth rate (SGR) of the fish were also analyzed. Results showed that the fantail guppy utilized the live organisms more efficiently than the artificial diet. Results are also encouraging because the fantail guppy became more brightly colourful which fed the carotenoid rich feed in comparison to the types of feed. Living tubifex was proved to be the best feed for guppy for increasing the growth and colouration.
Climatology of ground based and elevated inversions, multiple inversions, their thickness, lapse rate and mean wind speed through their heights for Visakhapatnam based on 00 and 12 GMT ascents during December-March for the year 1974-78 suggests that pollution potential at Visakhapatnam is high during December-February. Mean monthly morning and afternoon mixing depths and ventilation coefficients are found to be low from December to February hence pollutant concentration is likely to increase if released into the atmosphere. The percentage frequency of days when the morning mixing depth and transport wind speed and the afternoon ventilation co-efficient and transport wind speed which satisfy the stipulated criteria for high pollution potential point out that control measures to alleviate the pollution problems are to be taken between December and February.
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