Ahmed G U, Sultana N, Shamsuddin M, Hossain M Belal
Department of Aquaculture, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh.
Department of Fisheries and Marine Science, Noakhali Science and Technology University, Sonapur-3802, Bangladesh.
Pak J Biol Sci. 2013 Dec 1;16(23):1781-5. doi: 10.3923/pjbs.2013.1781.1785.
Field experiment was conducted to evaluate the growth performance of monosex tilapia using homemade feed with Peninsula Group fish meal and commercially available feed with local fish meal in earthen mini ponds from June-September 2010. Three ponds (T1) were supplied with prepared feed and the other three ponds (T2) with commercially available fish feed. Fish were fed at the rate of 10% of their body weight for the first thirty days then gradually reduced to 6% for the next ten days, 2% for the next ten days and 3% for remaining days. The temperature were ranged from 31.5-33.0 degrees C, DO from 5.5-15 mg L(-1) in T1 and 6.5-14 mg L(-1) in T2, pH from 7.1-8.0 in T1 and 7.1-7.7 in T2, alkalinity from 105-160 mg L(-1) inT1 and 100-145 mg L(-1) in T2, nitrate was 0.06 mg L(-1) in both treatments and ammonia from 0.02 and 0.04 mg L(-1) in T1 and T2, respectively. The results of the present study showed that the best weight gain was observed as 123.48 g in T1 than T2 (111.82 g). The Specific Growth Rate (SGR) was recorded 3.09 and 2.97 and the Food Conversion Ratio (FCR) was 1.51 and 1.40 in T1 and T2, respectively. There was significant (p < 0.05) variation among the survival rate (%) of fishes which were 75.55 and 90.37% in T1 and T2, respectively. The fish productions were 19076 and 16312.11 kg ha(-1) in T1 and T2. The highest net profit (Taka/ha/70 days) of Tk. 15, 83,213 was obtained with T1 So, the prepared feed showed better performance with monosex tilapia in compared with commercial fish feed with local fish meal.
2010年6月至9月,在小型土池中进行了田间试验,以评估使用含半岛集团鱼粉的自制饲料和含当地鱼粉的市售饲料养殖单性罗非鱼的生长性能。三个池塘(T1)投喂自制饲料,另外三个池塘(T2)投喂市售鱼饲料。最初30天,鱼的投喂量为体重的10%,随后10天逐渐降至6%,再接下来10天降至2%,剩余天数为3%。T1的水温为31.5 - 33.0摄氏度,溶解氧为5.5 - 15毫克/升,T2的水温为31.5 - 33.0摄氏度,溶解氧为6.5 - 14毫克/升;T1的pH值为7.1 - 8.0,T2的pH值为7.1 - 7.7;T1的碱度为105 - 160毫克/升,T2的碱度为100 - 145毫克/升;两种处理的硝酸盐含量均为0.06毫克/升,T1的氨含量为0.02毫克/升,T2的氨含量为0.04毫克/升。本研究结果表明,T1的最佳增重为123.48克,高于T2(111.82克)。T1的特定生长率(SGR)为3.09,T2为2.97;T1的饲料转化率(FCR)为1.51,T2为1.40。鱼的存活率(%)在T1和T2中分别为75.55%和90.37%,存在显著差异(p < 0.05)。T1和T2的鱼产量分别为19076千克/公顷和16312.11千克/公顷。T1获得了最高净利润(塔卡/公顷/70天),为1583213塔卡。因此,与含当地鱼粉的商业鱼饲料相比,自制饲料养殖单性罗非鱼的性能更好。