Journal of Environment and Sociobiology

Banani Mandal ¹, Arunava Mukherjee ², Samir Banerjee ³

Affiliations
1 Department of Zoology, Jogesh Chandra Chaudhuri College, 30 Prince Anwar Shah Road, Kolkata - 700033, IN
2 Department of Zoology, Ramkrishna Mission Vivekananda Centenary College, Rahara - 743186, IN
3 Aquaculture Research Unit, Department of Zoology, University of Calcutta, IN

Abstract

Ornamental fish farming is a new avenue in aquaculture in recent times as there is a growing demand of marine aquarium trade in the international market. Sundarbans is designated as the world's most potential nursery ground for fish juveniles. Carotenoids are the kind of pigment responsible for bright colouration of animals with potent antioxidant property. Like other animals, fishes are unable to synthesize carotenoids within their own body. Thus they depend on the dietary sources. Leaves of mangrove plants being rich in nutrients are great dietary supports for the estuarine fishes. Similarity in the distribution of different types of carotenoid pigments were found among the estuarine ornamental fishes and mangrove plants which focuses light on the association, dependency of estuarine fishes and mangrove plants. In the present study 67 ornamental finfish species were recorded from the mangrove zone of Indian Sundarbans.

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Banani Mandal ¹, Arunava Mukherjee ¹, Samir Banerjee ¹

Affiliations
1 Aquaculture Research Unit, Department of Zoology, University of Calcutta 35, Ballygaunge Circular Road, Kolkata-700019, IN

Abstract

A major input in terms of cost in aquaculture is feed and consequently, the aim of the most aquaculturist is to converting the feed into live fish with maximum efficiency and minimum cost. Though in many cases the feed supplied contains the optimal levels of ingredients, still the crucial factor is that it has to be consumed by the target species. If the feed is not readily consumed it would lead to wastage and poor feed conversion ratio (FCR) as well as pollution of the water body. To increase the acceptability or palatability of feeds and to reduce such pollutional problems, use of diet additives in fishery sector is relevant. Diet additives perform several functions. They act as nutritional supplements, colouring agents, flavouring agents, preservatives, moisture content controller, pH controller, physiocolgical activity controller, etc. Carotenoids are very commonly used as fish feed additives in different parts of the world. Carotenoids are a class of hydrocarbons and their oxygenated derivatives are characterized by a system of conjugated double bonds. Currently more than seven hundred carotenoids including their geometrical isomers are known. On the other hand, astaxanthin is a naturally occuring carotenoid pigment that has a unique antioxidant property. It is available from several biological species.

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Banani Mandal ¹, Arunava Mukherjee ², Samir Banerjee ³

Affiliations
1 Dept. of Zoology, Jogesh Chandra Chaudhuri College, 30 Prince Anwar Shah Road, Kolkata- 700033, IN
2 Kamarhati Sagore Dutt Free High School (H.S), Kolkata-700058, IN
3 Aquaculture Research Unit, Department of Zoology, University of Calcutta, IN

Abstract

Freshwater fish distribution and diversity status of Murshidabad district, West Bengal was studied from January, 2010 to December, 2010. We documented 66 fish species under 49 genera, 29 families and 8 orders during the study period from different perennial ponds, beels and rivers which are geographically located within or flow through the Murshidabad district. This district being a transitional zone between the North Bengal and south Bengal region, the study would help in the preparation of district-wise and zone-wise database of icthyofauna at the state level and in the implementation of conservation practices through the Government and various Non- Government Organizations.

Keywords

Diversity, Perennial, Transitional, Database, Icthyofauna, Conservation.

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