The Asian Journal of Animal Science

Sweta Pradhan ¹, S. Nanda ¹, Tulsankar Smita Sadanand ¹, G. C. Kund ², D. Choudhury ², R. K. Rath ¹

Affiliations
1 P.G. Department of Aquaculture, College of Fisheries (O.U.A.T.), Rangailunda, Berhampur (Orissa), IN
2 College of Fisheries, Orissa University of Agriculture and Technology, Rangailunda, Berhampur (Orissa), IN

Abstract

A 120 days feeding trial was conducted in triplicate in the cement cistern to investigate the effect of mixed feeding statagies on growth performances of striped cat fish (Pangasianodon hypothalamus) and catla (Catla catla) under polyculture system. Both the species of uniform size and initial weight were stocked at a ratio of 60:40 (striped cat fish 60% and catla 40%) by adopting a total stocking density of 30,000 numbers of fingerlings per ha. Experimental diets were prepared containing varying levels of proteins from the plant source like soybean, sesame oil cake, mustard oil cake following the standard procedures for formulation of pelleted feed. The feed ingredients like mustard oil cake, sesame oil cake. soybean, de-oiled rice bran, corn flour, vegetable oil, vitamin and mineral premix were procured and utilized for the purpose. Five experimental diet were prepared as T₀ : Control diet with the mixture of mustard oil cake and de-oiled rice bran, Low protein diet (T₁) with 15 per cent crude protein, High protein diet (T₂) with 30 per cent crude protein, T₃ One day low protein and one day high protein on alternate day and (T₄) Two days low protein and two days high protein on consecutive manner. The feed was provided to the experimental animals at a rate of 4 per cent of their body weight daily. Among all the different treatments, striped cat fish and catla attended maximum average weight gain under the influence of one day low protein and one day high protein diet in alternate manner (T₃) followed by T₂ (with high protein diet) and T₁ (with low protein diet).The growth performances under the treatment (T₄) was considered to be least. The analysis of variance revealed a significant difference (α=0.05) between the treatments and a highly significant difference was reported between the days of culture irrespective of fish species. The treatment (T₃) was considered to be the best out of all other treatments in term of average weight gain (g), increment in length, minimum FCR and PER with higher specific growth rate.

Keywords

Striped Cat Fish, Catla, Growth Performance, Polyculture.

Full Text

     

S. Panigrahi ¹, D. Choudhury ¹, J. K. Sahoo ¹, S. S. Das ², R. K. Rath ¹

Affiliations
1 College of Fisheries (O.U.A.T.), Berhampur, Ganjam (Odisha), IN
2 Krishi Vigyan Kendra, Orissa University of Agriculture and Technology, Berhampur, Ganjam (Odisha), IN

Abstract

A feeding trial was conducted to study the effect of Azolla, on growth and survival of L. rohita fingerlings. One hundred twenty (4.08 ± 0.02 g) fingerlings were randomly distributed in four treatment groups, each with three replications. Four isonitrogenous (crude protein: 27.75-28.26%) experimental diets were prepared with different percentage of Azolla incorporation except the control group, viz., control (T₀), T₁ (20% Azolla), T₂ (40% Azolla) and T₃ (50% Azolla). The physio-chemical parameters were found in the normal range through out the experimental period. The results revealed that the test animals fed with diet containing 40 per cent Azolla showed better growth (15.45 ± 0.24 g in wt. and 13.73 ± 0.47 cm in length) than the test animals fed with 20 per cent, 50 per cent and control diet. The body weight gain per cent was recorded highest in diet containing 40 per cent Azolla (281.57 ± 7.21) than control (175.62 ± 2.31). The specific growth rate (SGR) was found highest in T₂ group (0.73 ± 0.01) followed by T₃ group (0.67± 0.01) which was (P < 0.05) higher than T₁ and control group. The FCR also varied significantly (P<0.05) among the treatment group. The better FCR was observed in T₂ group followed by T₃ group. This results suggest that incorporation of Azolla at 40 per cent can enhances growth in L. rohita fingerlings and can effectively be used in conventional diet of rohu without any adverse effect on growth and survival.

Keywords

Azolla sp., Fish, Labeo rohita.

Full Text