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Growth and Survival Rate of Two Indigenous Fish Species with Three Different Feeds Under Tank Condition

Sabina Sultana
Associate Professor
Department of Zoology, University of Rajshahi, Rajshahi, Bangladesh

Shihab Alam
Department of Zoology, University of Rajshahi, Rajshahi, Bangladesh

Sahadat Hossain
Department of Zoology, University of Rajshahi, Rajshahi, Bangladesh

Abstract/ Executive Summary:

The objective of this present investigation was to inspect the growth and survival rate of Labeo rohita and Cirrhinus mrigala after feeding different mixture feeds in tank condition. The study was conducted during the period February, 2016 to December, 2016 at Field Laboratory, Department of Zoology, University of Rajshahi, Bangladesh. The maximum growth in length and weight was calculated for L. rohita as 46.79% and 185.17% respectively in Tank-1 with Mustard oil cake and Rice bran mixture diet. In survival test, at the end of study period L. rohita and C. mrigala showed 57.16% survival with T1 with Mustard oil cake and Rice bran mixture diet and T3 with Wheat flour and Mustard oil cake mixture diet; 57.16% and 71.45% survival in T2 with Maize bran and Mustard oil cake mixture diet respectively; while without supplementary food L. rohita and C. mrigala showed 14.29% and 0% survival respectively at the end of study period.

Keywords: Growth, Survival, Indigenous, Labeo rohita, Cirrhinus mrigala

Location: Field Laboratory, Department of Zoology, University of Rajshahi, Bangladesh

Start Date: 00-02-2016

End Date: 00-12-2016

Program Area: Animal Health and Management

Commodity: Fish species, Tank, Feed

Objectives:

In this study, three different feeds composed from four plant-derived feeds ingredients- Mustard oil cake, Rice bran, Wheat flour and Maize bran at different proportion, were fed to L. rohita and C. mrigala as supplementary feeds to check out the growth and survival rate after feeding different mixture feeds in tank condition.

Methodology:

2.1 Collection and transformation of fish The specimens, Rui (Labeo rohita) and Mrigal (Cirrhinus mrigala) were collected from Nursery pond of Binodpur and Meherchondi, Rajshahi, Bangladesh. The fish was transported from Nursery ponds in container to the Field Laboratory.

2.2 Experimental set up with diets The feeding trial was performed in tank. Each tank was made by Brick and Cement. The size of each tank was the length of 2 feet 9 inch, width of 1 feet 9 inch, and height of 1 feet 9 inch. Water capacity was 150 liters for all two species together. Tap water was used as the main source of water supply. Arrangements were made to ensure proper supply of dissolved Oxygen. Three different types of feed were used that were procured from Shaheb bazar feed market, Rajshahi, Bangladesh. The conventional mixture of Rice bran 50% + Mustard oil Cake 50% was used as the T1 diet whereas the 2nd diet was Maize bran 70% + Mustard oil Cake 30% used as the T2 and the 3rd diet was Wheat flour 60%+ Mustard oil Cake 40% as the T3. Prior to prepare pellet feed, all the ingredients were finely powdered. The feeding experiment was conducted in two phases. In phase-1: Each feed was tested in separate tank that held together of two species and study continued for 4 months. In phase-2: T4 was tested without feed of 2 fish species held together. After taking the initial length (cm) and weight (g), the fish were immediately transferred to large tank, each species in separate tank. The fish were then acclimatized in running water for about 24 hrs. Then 7 fish for each species were transferred to a tank. Thus making total 14 fish for each tank prior to release of fish the tank were filled with tap water.

2.3 Sampling of fish for growth study The fishes were sampled following a monthly schedule. On the sampling day, the fish were by scoop net and kept in plastic bucket with water and oxygenation arrangement. The fish were brought to the measurement table for taking measurement and weight.

2.4 Observations on fish Observations were also made on the mortality of fish for testing the survival rate. The first was inspected each day and any death observed was recorded. Observations were also on the preference of feed by individual fish species. In practice the acceptance of feed by the fish, preference of feed, approach to feed etc. were observed and recorded. Finally, the average length and weight were also measured with the help of meter scale and electric balance machine.

2.5 Statistical analysis All the calculations in the present study were done with the help of a scientific calculator. A total 56 specimens were studied through out of observation.

Source of Information: International Journal of Fisheries and Aquatic Studies 2018; 6(3): 340-343

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

It was observed in the study that the culture of two indigenous fish species (Labeo rohita, Cirrhinus mrigala) with supplementary feed is easily possible in Bangladesh. Though two types of supplementary feeds were accepted but feed Type-1 (Rice bran + Mustard oil cake) was more favourable to the fishes as Rui and Mrigal showed more or less equal survival performance in this regard. From this investigation, it can be concluded that the handling of carp fishes provided by supplementary feed boosted the growth along with survival rate in tank condition. So, the people of Bangladesh can easily culture the carp fishes in tank condition by providing supplementary feeds. Moreover, culturing fishes in tank condition is very much effective in the present perspective of Bangladesh as there is a scarcity of cultivable land available for culturing fish.

Knowledge Management: Journal