Polyculture of a Critically Endangered Olive Barb,Puntius sarana (Ham.), with Indigenous Major Carps in Earthen Ponds     

M. Aminur Rahman  K. M. Azimuddin  S. Yeasmine 《Journal of the World Aquaculture Society》2011,42(6):778-788

Polyculture of olive barb with indigenous major carps was carried out for 8 mo at different densities in earthen ponds. All the experimental ponds were stocked with fingerlings of major carps viz., catla, Catla catla, and rohu, Labeo rohita, at the rate of 3750/ha each. In addition, olive barb, Puntius sarana, was stocked at the rate of 10,000, 12,500, and 15,000 fingerlings/ha in treatment‐1 (T₁), treatment‐2 (T₂), and treatment‐3 (T₃), respectively. Fish in all the ponds were fed with supplementary feed comprising of rice bran (70%), mustard oil cake (25%), and fish meal (5%) at the rate of 3–6% of the estimated body weight. Physicochemical parameters and plankton populations of pond water were within the acceptable range for fish culture. The mean final weight, weight gain, and specific growth rate of catla were very similar in all the treatments while those for rohu and olive barb were significantly higher in T₁ than in T₂ and T₃. The gross and net productions in T₁ were significantly higher than in T₂ and T₃. The net benefit was also highest in T₁ followed by T₂ and lowest in T₃. Under the conditions of this experiment, growth, production, and benefits were greatest at a stocking density of olive barb at 10,000/ha in polyculture with other major carps.  相似文献   

Effect of combined shrimp and rice farming on water and soil quality in Bangladesh     

Md. Arif Chowdhury  Yahya Khairun  Md. Salequzzaman  Md. Mizanur Rahman 《Aquaculture International》2011,19(6):1193-1206

This study analyzed water and soil quality and environmental impacts of shrimp farming in the southwestern coastal region of Bangladesh. Shrimp farming in the region is very traditional in nature where two culture systems viz. shrimp–rice and shrimp-only are being practiced, which are characterized by lower production, repeated stocking, irregular feeding, and fertilizing. Water quality in both farming systems was found suitable for optimum growth and survival of shrimp (Penaeus spp.). The level of 5-day biological oxygen demand (BOD₅) in both systems even in canal water was within the recommended level provided by the Government of Bangladesh which is less than 5 mg/l. Therefore, effluents of shrimp farms in the study area did not show any nutrient pollution on the surrounding environment. However, saltwater intrusion has caused many problems like loss of agricultural production, reduced availability of fodder for livestock, and fresh water for domestic uses in the coastal region. The findings of this study confirmed that shrimp farming using saline water have long-term effect of soil salinization. As a result, it poses a real threat toward sustainability of coastal shrimp farming as well as coastal development in Bangladesh.  相似文献   

Tetraselmis chuii biomass as a potential feed additive to improve survival and oxidative stress status of Pacific white-leg shrimp Litopenaeus vannamei postlarvae     

Rahman  Norazira Abdu  Khatoon  Helena  Yusuf  Norhayati  Banerjee  Sanjoy  Haris  Noor Azilah  Lananan  Fathurrahman  Tomoyo  Katayama 《International Aquatic Research》2017,9(3):235-247

International Aquatic Research - Shrimp is an important traded fishery commodity. When subjected to stress, shrimp usually suffers from oxidative stress, which leads to cell injury, senescence, and...  相似文献   

Studies on the presentation of artificial diets for rearing the larvae of Penaeus japonicus Bate     

D.A. Jones  A. Kanazawa  S. Abdel Rahman 《Aquaculture (Amsterdam, Netherlands)》1979,17(1):33-43

The preparation of microencapsulated diets for rearing the larvae of Penaeus japonicus is described. Once the correct microcapsule size and feeding concentration had been determined, experiments showed that survival rates of 50% to post-larva were possible. Comparative experiments using artificial diets in the form of free particulates indicate that survival rates may be even higher (66–68%) on these diets providing precautions are taken to avoid bacterial blooms. Further investigations revealed that microencapsulated semi-defined diets may be used to determine the nutritional requirements of Penaeus larvae.  相似文献