Growth rate and conversion efficiency of the air-breathing catfish, Heteropneustes fossilis, in relation to ration size

Reddy, S. Ravichandra; Shakuntala, Katre

doi:10.1016/0044-8486(79)90098-x

Cited by 28 publications

(14 citation statements)

References 12 publications

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“…FCR values of T 1 were significantly lower than those in T 2 and T 3 . The FCR of this study are very similar to the values reported in the threatened silurid catfish, Ompok pabda (Rahman et al 2008), but much lower than those observed in the air breathing catfish, Heteropneustes fossilis (Reddy & Katro 1979). However, the lower FCR value in this study indicates better food utilization efficiency, despite the values increased with increasing stocking densities.…”

Section: Discussionsupporting

confidence: 81%

Stocking density effects on growth and production of the threatened silurid catfish,Mystus cavasius(Hamilton) fingerlings in nursery ponds

Rahman

Zaher

et al. 2012

Aquac Res

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The fingerling‐rearing experiment of the threatened catfish, Mystus cavasius was carried out at different stocking densities in earthen nursery ponds. Twelve‐day‐old fry were stocked at 200 000 ha−1 in treatment‐1 (T1), 250 000 ha−1 in treatment‐2 (T2) and 300 000 ha−1 in treatment‐3 (T3) respectively. The mean length and weight of fry at stocking was 1.24 ± 0.25 cm and 0.11 ± 0.04 g respectively. Fry in all the experimental ponds were supplemented with SABINCO nursery feed for the first 14 days and starter‐I feed for days 15–56. The physico‐chemical parameters and plankton population of pond water were within the suitable level for fish culture. Growth in terms of final weight, final length, weight gain, length gain and specific growth rate and survival of fingerlings were significantly higher in T1 than those in T2 and T3. Feed conversion rate was significantly lower in T1 followed by T2 and T3 in that order. Significantly higher number of fingerlings was produced in T3 than that in T2 and T1. Even then, consistently higher net benefits were obtained from T1 than those from T3 and T2. Among the treatments evaluated, 200 000 fry ha−1 was the best stocking density considering the highest growth, production and net benefits of fingerlings of M. cavasius in nursery ponds.

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Section: Discussionsupporting

confidence: 81%

Stocking density effects on growth and production of the threatened silurid catfish,Mystus cavasius(Hamilton) fingerlings in nursery ponds

Rahman

Zaher

et al. 2012

Aquac Res

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“…Because feeding rate affects nutrient requirements in fish, such knowledge is regarded as a prerequisite for estimation of the amounts of nutrients they should receive (Tacon and Cowey 1985;Talbot 1985). The quantity and quality of feed consumed have a pronounced effect on growth rate, efficiency of feed utilization, and chemical composition (Reddy and Katre 1979;Reinitz 1983a, b;Machiels and Henken 1985;Lovell 1989;Pickering 1993). Several other factors including fish size and water temperature also I.…”

Section: Introductionmentioning

confidence: 99%

Effect of ration size on growth, body composition, and energy and protein maintenance requirement of fingerling Indian major carp, Labeo rohita (Hamilton)

Ahmed

2007

Fish Physiol Biochem

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An eight-week feeding trial has been conducted to determine the optimum ration for Indian major carp, Labeo rohita, fingerling (4.10 ± 0.30 cm, 0.55 ± 0.16 g) by feeding a purified diet (40% CP; 3.61 kcal g -1 GE) at six levels, 2, 4, 6, 8, 10, and 12% of body weight per day, at 0800 and 1600 h, in triplicate, to 20 fish per trough fitted with a water flow-through system. Highest weight gain, best feed conversion ratio (FCR), best specific growth rate (SGR%), and highest protein efficiency ratio (PER) were evident for rations of 6-8% body weight. Second-degree polynomial regression analysis for FCR, PER, protein, and energy retention data indicated the break-points occurred at 6.55, 6.75, 6.80, and 6.95% bw per day, respectively. Significant (P < 0.05) differences between body composition were observed for fish fed different rations. Maximum body protein content was recorded for 6% and 8% rations. A linear increase in body fat content was evident with increasing ration.Body moisture and ash content remained nonsignificantly (P > 0.05) low for higher rations, however. On the basis of these results it is recommended that feeding in the range 6.5-7.0% bw per day corresponding to 2.6-2.8 g protein and 23.49-25.31 kcal energy per 100 g of the diet per day is optimum for growth and efficient feed utilization of Labeo rohita. Results for 2-4% rations (0.8-1.6 g protein and 7.23-14.46 kcal energy) suggest these amounts approximate to the maintenance requirement of this fish.

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“…Gross energy (GE) level of the experimental diet was also based on the requirement determined by conducting a preliminary feed trial in our laboratory. Although information on ration size of H. fossilis fed the oligochaete worm Tubifex tubifex as food is available (Reddy and Katre 1979), no information is available on the optimal ration level for prepared feeds. Therefore, the aim of our experiments was to achieve better growth, conversion efficiencies and body composition of fingerling H. fossilis by optimizing the ration level.…”

Section: Introductionmentioning

confidence: 99%

Optimum ration level for better growth, conversion efficiencies and body composition of fingerling Heteropneustes fossilis (Bloch)

Khan

Abidi

2008

Aquacult Int

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The effects of ration levels on growth, conversion efficiencies and body composition of fingerling Heteropneustes fossilis (6.8 ± 0.04 cm, 5.0 ± 0.02 g) were studied by feeding isonitrogenous (40% crude protein) and isocaloric (19.06 MJ kg -1 gross energy) diets representing 1, 3, 5, 7 and 9% of the body weight (BW) day -1 to triplicate groups of fish . Growth performance of the fish fed at the various ration levels was evaluated on the basis of live weight gain percentage (LWG%), feed conversion ratio (FCR), specific growth rate percentage (SGR%), protein retention efficiency (PRE%) and energy retention efficiency (ERE%) data. Maximum LWG% and SGR were obtained at a feeding rate of 7% BW day -1 , whereas best FCR (1.6), PRE% and ERE% were recorded at a feeding rate of 5% BW day -1 . Maximum body protein was also obtained for the group receiving the diet representing 5% of their body weight. However, a linear increase in fat content was noted with the increase in ration levels up to 7% BW day -1 . The SGR, FCR, PRE and ERE data were also analyzed using second-degree polynomial regression analysis to obtain more precise information on ration level, with the results showing that the optimal ration for these parameters was 6.8, 6.1, 5.9 and 6.2% BW day -1 , respectively. Based on the above second-degree polynomial regression analysis, the optimum ration level for better growth, conversion efficiencies and body composition of fingerling H. fossilis was found to be in the range of 5.9-6.8% of the BW day -1 , corresponding to 2.36-2.72 g protein and 88.20-101.66 MJ digestible energy kg -1 diet day -1 .

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Growth rate and conversion efficiency of the air-breathing catfish, Heteropneustes fossilis, in relation to ration size

Cited by 28 publications

References 12 publications

Stocking density effects on growth and production of the threatened silurid catfish,Mystus cavasius(Hamilton) fingerlings in nursery ponds

Stocking density effects on growth and production of the threatened silurid catfish,Mystus cavasius(Hamilton) fingerlings in nursery ponds

Effect of ration size on growth, body composition, and energy and protein maintenance requirement of fingerling Indian major carp, Labeo rohita (Hamilton)

Optimum ration level for better growth, conversion efficiencies and body composition of fingerling Heteropneustes fossilis (Bloch)

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