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首页> 外文期刊>Bangladesh journal of fisheries research >Monoculture of three native air breathing fishes in homestead ditches and plastic barrels
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Monoculture of three native air breathing fishes in homestead ditches and plastic barrels

机译：在宅基地沟渠和塑料桶中对三种自然呼吸鱼类的单种养殖

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Six on-farm trials were conducted from 1 August to 23 November 2004 in two different environments such as homestead ditches (10 to 17 m~2) and plastic barrels (240 liters) to develop techniques for nonoculture of climbing perch, Anabas testudineus, stinging catfish, Heteropneustes fossilis and walking catfish, Clarias batrachus for poor and landless people who have no access to pond. Stocking density for ditch was 10fry/m~2 while that for barrel was 20 fry/m~3. The fishes were fed with 3-test diets viz. low-cost formulated feed (rice bran 20%, wheat meal 10%, mustered oil cake 35%, poultry offal 35%), live foods (chopped snails and clams), and a commercial feed (Saudi-Bangla feed, starter 3: first month and grower-1: subsequent two months) and designated as T_1, T_2 and T_3, respectively. Feeding rate was the same in all the treatments viz. 10% of body weight(first two months), 8% (third month) and 6% (fourth month). T_1 and T_2 had three replications while T_3 had two replications. Water temperature was recorded weekly while fish growth was monitored monthly. After 4 months' rearing, H. fossilis and C. batrachus in ditches and barrels attained higher average weight in T_2 followed by T_3 and T_1 while A. testudineus in barrels also attained higher average weight in T_2 The variation in net weight gain by A. testudineus in ditch fed test diets T_2 and T_3 was not significantly different (P>0.05) though the net gain in both T_2 and T_3 was significantly (P<0.05) higher than that of T_1. The yieldof climbing perch as obtained from T, T_2 and T_3 was 988,1136 and 1185 kg/ha, respectively while that stinging catfish was 395, 242 and 444 kg/ha and walking catfish was 1605, 2,099 and 1,654 kg/ha respectively. All the three species showed significantly lower growth rate in barrels than in ditches.
机译：2004年8月1日至11月23日，在宅基地沟渠（10至17 m〜2）和塑料桶（240升）等两种不同环境中进行了六项农场试验，以开发攀爬鲈鱼，Anaabas testudineus，刺痛的非栽培技术。 for鱼，杂种化石和步行walking鱼，适合无法进入池塘的贫困和无地人士。沟的放养密度为10fry / m〜2，桶的放养密度为20fry / m〜3。给鱼喂3试验饮食，即。低成本配方饲料（米糠20％，小麦粉10％，油饼35％，家禽内脏35％），活食（蜗牛和蛤c切碎）和商业饲料（沙特-邦格拉饲料，起动机3：第一个月和生长者1：随后的两个月），分别指定为T_1，T_2和T_3。在所有处理中喂食率均相同。体重的10％（头两个月），8％（第三个月）和6％（第四个月）。 T_1和T_2具有三个重复，而T_3具有两个重复。每周记录水温，每月监测鱼的生长。饲养4个月后，沟渠和桶中的化石杆菌和棒状芽孢杆菌在T_2中的平均重量较高，随后是T_3和T_1，而桶中的睾丸草在T_2中的平均重量也较高，A的净重增加变化。沟饲试验日粮T_2和T_3的睾丸无显着差异（P> 0.05），尽管T_2和T_3的净增幅均显着高于P_1（P <0.05）。从T，T_2和T_3获得的攀爬鲈鱼产量分别为988,1136和1185 kg / ha，而while鱼为395、242和444 kg / ha，步行and鱼分别为1605、2,099和1654 kg / ha。这三个物种在桶中的生长速度均明显低于沟渠。

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