Optimization of stocking density of Vietnamese climbing perch in cage at coastal region (original) (raw)
Related papers
Effects of stocking density on the growth and production of thai koi (Anabas testudineus)
2009
Different growth and production parameters of cage cultured Vietnamese climbing perch (Anabas testudineus, Bloach), locally known as koi, were studied. Fishes were reared in bamboo framed net cages under three different stocking densitiesina single experimental culture cycle of 4 months (July to October, 2013). The experimental earthen pond at Sher-e-Bangla Agricultural University (SAU) campus, Dhaka, was installed with a total of nine 1m (1m x 1m x 1m) cages; wherein 100 fish m , 150 fish m and 200 fish m were 3 3 3 3 3 2
Different growth and production parameters of cage cultured Vietnamese climbing perch (Anabas testudineus, Bloach), locally known as koi, were studied. Fishes were reared in bamboo framed net cages under three different stocking densitiesina single experimental culture cycle of 4 months (July to October, 2013). The experimental earthen pond at Sher-e-Bangla Agricultural University (SAU) campus, Dhaka, was installed with a total of nine 1m3 (1m x 1m x 1m) cages; wherein 100 fish m 3, 150 fish m 3and 200 fish m 3 were set as the different stocking densities demarked as treatment T1, T2 and T3 respectively with three replications each. Mean initial length and weight of the fries were 4.21± 0.114, 4.42± 0.023 and 4.51± 0.047 cm for T1, T2 and T3, respectively. Mean initial weight for the same treatments were 1.62 ± 0.089, 1.54 ± 0.045 and 1.60 ± 0.0097 g, respectively. Whereas the mean harvesting length and weight for T1, T2 and T3 recorded were 16.63± 0.119, 16.12± 0.039, 16.67± 0.093 cmand 105.54±1.84, 118.60±2.535, 112.49±2.10 g, respectively. T2 showed the highest length and weight gain after harvesting (P<0.05). The specific growth rate of T2 was found significantly different among treatments and again T2 resulting the highest figure of 3.60±0.003 (%). The same treatment had the highest survival rate of 62.66 ± 4.66 (%) with a mean of 57.44±2.36 (%). However, no significant difference among treatments was observed for survival rate (P>0.05). Finally, the gross yield (kgm 3) was 7.929±0.92 in T2 (P<0.05) which was highest among all the treatments and T2 returned back lowest production of 3.39 ± 0.307 kg m 3 which was significantly lower than the yield found in remaining treatments.The gross revenue earned from selling of fish at a price of 220 Tk kg 1 were 747.98 ± 67.54, 1744.5 ± 203.6 and 1665.1 ± 187.7 Tk m 3 in T , 1 T2 and T3, respectively. Whereasthe values,in terms of net profit, stood at 418.3 ± 141.16, 779.0 ± 170.73 and 62.00 ± 43.40 Tk m 3 for the same treatments, respectively. Therefore, the cage with 150 fishes (T ) showed 2 promising growth, yield and survival rate which could be recommended to adopt. However, more trials are suggested to optimize the stocking density and feeding regime for better production performance and profit.
2017
A culture experiment was conducted to see the growth and production performance of Vietnamese koi (Anabas testudineus) with Magur (Clarias batrachus) at different stocking densities in a farmer's ponds under semi-intensive rearing system for a period of 120 days. The experiment was conducted in three ponds at Rahmatpur of Muktagachha Upazila of Mymensingh district from 5 August to 5 December, 2013. The size of ponds were 24 (T 1), 24 (T 2) and 24 (T 3) decimal with an average depth of 4 feet. Three different stocking densities were tested, namely treatments T 1 (400 fish /decimal, 350 Vietnamese koi and 50 magur); T 2 (450 fish /decimal, 400 Vietnamese koi and 50 Magur) and T 3 (550 fish /decimal, 500 Vietnamese koi and 50 Magur). Ruposhi Bangla feed was used in all treatments two times daily from the beginning of the fry stocking. The initial weight of Vietnamese koi and Magur were 5±0.00 g and 2±0.00 g respectively. The initial length of Vietnamese koi and Magur were 2.54 and 3.50 cm respectively. The average highest final weight gain of Vietnamese koi was (138.71±0.03 g) observed in T 1 and followed by T 2 (135.65±0.12 g) and T 3 (129.29±0.49 g). Similarly, the average highest final weight gain of Magur (76.00±0.58 g) was observed in T 1 and followed by T 2 (68.36±0.43 g) and T 3 (62.61±0.58 g) respectively. The average highest final length gain of Vietnamese koi (17.38±0.05 cm) was observed in T 1 and followed by T 2 (17.00±0.04 cm) and T 3 (16.33±0.03 cm). Similarly, the average highest final length gain of Magur (21.30±0.09 cm) was observed in T 1 and followed by T 2 (17.00±0.05 cm) and T 3 (15.87±0.02 cm) respectively. The survival rate of the stocking Vietnamese koi and Magur were recorded 95.14 and 72.00 % in T 1 ; 93.25 and 64.00% in T 2 ; 90.80 and 68.00 % in T 3 respectively. Fish production in T 1 , T 2 and T 3 were 48.93; 52.79 and 60.83 kg/decimal/120 days, respectively. The total production of T 3 was increased with the increasing of stocking density compare to T 2 and T1. The benefit-cost ratio (BCR) was higher in T 3 where BCR was 1.67 and on the other two treatments BCR was 1.53 in T 2 and 1.52 in T 1 although the highest production was obtained in T 3 but individually growth performance of Vietnamese koi and Magur were higher in T 1. Based on the result of the present experiment, farmers could be suggested to rear Vietnamese koi with Magur at the stocking density of 550 fish/decimal (500 Vietnamese koi and 50 Magur) which was the highest density tried to get more production and financial benefit. Further experiment need to be conducted by taking higher density than the 550 fish/decimal for the optimization of stocking density to get more production and benefit.
2007
An on-farm trial was undertaken in nine earthen ponds (400 to 640m2) to evaluate the growth and production potentials of climbing perch, Thai koi (Anabas testudineus) for the period of four months from March through June 2006. Three stocking densities such as 75,000 (T1), 100,500 (T2) and 125,000/ha (T3) were tested with three replications. Fish were fed with commercial (SABINCO) pelleted feed (35% crude protein). Fish productions obtained in three treatments such as T1, T2 and T3 were 6,480±217, 6,384±154, 6,617±187 kg· 1ha, respectively. The results demonstrated higher mean growth in T1 than in T2 and T3. However, the net benefit was achieved Tk. 7,26,975 from T1, where the stocking density was 75,000/ha.
Growth and production performances of crossbred climbing perch koi, Anabas testudineus in Bangladesh
Int. J. Agril. Res. Innov. & Tech. 2 (1): 19-25, 2012
The study was performed for evaluating the growth and production performances of crossbred climbing perch (Anabas testudineus) during August to October 2009. The crossbred groups of fish were produced by crossing between native climbing perch and Thai climbing perch (A. testudineus). Growth and production performances was compared at grow out condition between crossbred groups in the two reciprocal crosses of treatments viz. T1: Native climbing perch (♀) × Thai climbing perch (♂) and T2: Thai climbing perch (♀)×Native climbing perch (♂. At the same time, they were compared also with their respective control F1 pure line groups i.e. T3: Native climbing perch (♀) × Native climbing perch (♂) and T4: Thai climbing perch (♀) × Thai climbing perch (♂). It was evident from the results that among the treatments in grow out system, the highest mean harvesting weight was 69.25±9.01 g found in T4 (Thai climbing perch), which was significantly different (P<0.05) from all other treatments. Whereas, T3 (native climbing perch) also showed the lowest mean harvesting weight 33.38±8.74 g and showed significant differences (P<0.05) among all the treatments. The mean harvesting weight of both the crossbred groups i.e. T1 and T2 were 50.83±6.65 and 59.94±7.83 g, respectively and these results were statistically insignificant (P>0.05) between them but significant among all other treatments. The highest (93.60%) and lowest (83.06%) survival rates were observed in Thai koi (T4) and native Koi (T3) parental stocks, respectively. Wider variations in terms of productions performances were observed among the treatments, where the gross production of T1, T2, T3 and T4 were 2,753±96.67, 3,401±73.26, 1,733±168.47 and 4,051±185 kg/ha, respectively. The productions obtained from crossbred groups were at intermediate compared to their control pure line groups. Higher FCR mean value was observed in native control line (T3), while, lower FCR mean value was observed in Thai control line (T4).
Anabas testudineus (Climbing perch) growth and production were estimated using locally constructed cages (1 m 3) at various stocking densities (40, 60, 80 and 100 fish m-3) in a forest water body, located in Tripura, NE India. Each rearing density was repeated three times. The size of the fish at release was 3.5 ± 0.3 cm/2.8 ± 0.35 g and they fed with pellet feed @ 2% (28% CP) of fish biomass. After 180 days of farming, we observed that an increase in stocking density decreased fish length, body weight, specific growth rate (SGR) and survival rate, as well as reduced feed conversion efficiency of fish. Maximum fish growth was recorded at a stocking density of 40 fish m-3 (84.5 ± 0.67 g fish-1) and minimum at density of 100 fish m-3 (53.4 ± 3.07 g fish-1). There was no significant difference in weight gain and SGR between 40 and 60 fish m-3 (p ≤ 0.05). The SGR ranged from 1.63 to 1.88%/ day and the FCR ranged from 2.3 to 2.8. Survival was highest at 40 fish m-3 (87.6%) and lowest at 100 fish m-3 (58.6%). Fish biomass production ranged from 2.96 ± 0.05 kg (40 fish m-3) to 4.0 ± 0.29 kg cage-1 (60 fish m-3). Based on this study, it can be concluded that a stocking density of 60 fish m-3 is optimal for cage farming of A. testudineus to ensure better growth and survival of the fish and forest water bodies can be explored for cage culture.
Journal of Environmental Science and Natural Resources, 2015
The present experiment was conducted to study the culture practice of Thai Koi (Anabas testudineus) with different stocking densities and their growth performance. The study was carried out over a period of 76 days from 22 June, 2008 to 05 September, 2008 in Tarakanda upazila of Mymensingh district. For the study, the experiment was undertaken with 3 treatments (T 1, T 2 and T 3) each having two replications (R 1 and R 2). Three different stocking densities designed as treatments viz., 550 in T 1 , 400 in T 2 and 350 fry /dec in T 3. The fry of same size (length 2.45 cm and weight 5g initially) were stocked and they were fed with commercial pelleted feed according to their body weight. At the very beginning 16% feed were provided with frequency 4 times in a day. It was decrease up to 4.5% before 10 days of harvesting. During the experiment period, water quality was assessed fortnightly. The average temperature was found 28.21±0.87 0 , 28.78±0.51 0 and 28.76±0.78 0 C in treatments T 1, T 2 and T 3 respectively. The pH ranges were varied between 7.70 to 9.10 among the three treatments. The mean values of dissolve oxygen were 5.33±0.34, 4.23±0.13, 4.16±0.14 mg/L respectively in the three consecutive treatments. The growth performance was determined by measuring length (cm) and weight (g). Treatment-3 where stocking density was less showed the best growth performance followed by T 1 and T 2. The production was higher 8719.10kg/ha in T 1 was obtained from this treatment.
An experiment was conducted in nine experimental ponds (each size 0.006 ha) to assess growth and production potentials of Climbing perch, Thai koi (Anabas testudineus) for the period of five months from July 23 to December 21, 2011. Three stocking densities were tested with three replications for each, viz., 50,000/ha as Treatment-1, 75,000/ha as Treatment-2 and 1, 00,000/ha as Treatment-3. Fish in all the experimental ponds were supplemented with commercial floating pellet feed (35% crude protein). The physico-chemical parameters and plankton populations of pond water were within the suitable range for fish culture. Final weight and survival of Thai koi in Treatment-1 were significantly higher (P<0.05) than those in Treatment-2 and Treatment-3. Food conversion rate was significantly lowest in Treatment-1followed by Treatment-2 and the highest in Treatment-3. The production obtained from treatments Treatment-1, Treatment-2 and Treatment-3 were 4800.40, 5279.61 and 5582.23 kg/ha, respectively but showed no significant (P>0.05) difference from each other. However, the highest net benefit was derived in Treatment-1(BDT 4,43,458/ha), where the stocking density was 50,000/ha. The study reveals that less number of stocking density gives higher growth, survival, final production and net benefit.
2012
An experiment was carried out in 6 earthen ponds to investigate the effects of stocking density on growth, survival and production of Thai climbing perch (Anabas testudineus). Three stocking densities (treatments) were compared: ponds with 350, 400 and 550 individuals per decimal (0.01 acre). All treatments were randomly assigned and in duplicate. Artificial feed containing 34% crude protein was applied initially 20% of total fish weight per day. Gradually the feeding rate was reduced to 15, 12, 10, 8 and 5% of total fish weight per day. Feeding rates per pond were adjusted fortnightly after weighing minimum 20% of the fish stocked. The duration of the experiment was 90 days. Results showed that all growth parameters were higher in ponds with lower stocking density than the ponds with higher stocking density, while total fish yield was higher in ponds with higher stocking density than in the ponds with lower stocking density. Cost-benefit analysis revealed that all three systems were economically profitable. However, the ponds with a stocking density of 550 individuals per decimal were the most profitable system. More research is still needed to further optimize stocking density of Thai climbing perch in aquaculture ponds. Until then, stocking 550 individuals of Thai climbing perch per decimal will yield a good production to fish farmers in the South and SouthEast Asian regions.