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Articles by M.J. Alam
Total Records ( 7 ) for M.J. Alam
  S. Rheman , M.L. Islam , M.M.R. Shah , S. Mondal and M.J. Alam
  A total of 50 mature female specimens were examined for fecundity and gonadosomatic index study. The fecundity of the fish ranged from 19343.33 to 301700 with an average value of 126812.6. The relationship between fecundity and gonad weight was most significant (r= 0.9729) than that of fecundity with other factors. The relationship between fecundity and total length, body weight and gonad weight is linear and the regression equation are i) Log10F= 0.0024+4.0761 Log10TL, ii) Log10F= 3.3177+1.0778 Log10TW and iii) Log10F= 3.7550+1.5161 Log10GW. The fish was found to spawn for several months with two spawning peaks. One in December and other in February as indicated by the peaks of gonadosomatic index.
  S.M. Bokhtiar , M.J. Alam , K. Mahmood and M.H. Rahman
  Field experiments were conducted to study the effects of integrated plant nutrient system (IPNS) on the yield and yield contributing parameters of sugarcane at Ishurdi, Thakurgaon and Sreepur under High Ganges River Flood plain, Old Himalayan Piedmont Plain and Madhupur Tract, respectively. The use of organic and inorganic fertilizer showed significant effect on the yield and yield attributes like tillers, millable stalk and juice quality of sugarcane. The results revealed that yield increase was to the extent of 22.86, 49.2 and 74.0 % at Ishurdi, Thakuragaon and Sreepur, respectively due to the application of 12.5 t ha -1 press mud/cowdung accompanying chemical fertilizers applied on the basis of soil test for HYG over present recommended rates of chemical fertilizer (as per FRGĀ“97) for MYG. Press mud alone increased 16-20 per cent cane yield over the dose of N, P, K, S, Zn and Mg fertilizers based on soil test for HYG at all locations. Incorporation of dhaincha (Sesbania aculeata) as green manure increased cane yield and contributed about 42-46 kg N ha -1 in soil.
  M.J. Alam , S. Dewan , M.R. Rahman , M. Kunda , M. Kunda , M.A. Khaleque and M.A. Kader
  The experiment was carried out simultaneously to compare the growth performance of Amblypharyngodon mola in rice fish culture system with Barbodes gonionotus and cyprinus carpio in farmer`s rice fields near to Bangladesh Agricultural University campus, Mymensingh for a period of 113 days from 12th August to 3rd December, 2002. Three treatments viz., T1 with A. mola and B. gonionotus, T2 with A. mola and C. carpio and T3 as control (without fish) were used in this study. Each treatment was provided with three replications. All the treatments were fertilized with urea (200 kg ha-1), TSP (150 kg ha-1) and MP (75 kg ha-1). With respect to cultural suitability, A. mola showed comparatively high growth rate and survival rate when it was stocked with C. carpio than with B. gonionotus. Among the three species A. mola showed the lowest growth rate and C. carpio showed the highest growth rate by average, net and percentage of increase. The production of fish were also recorded higher (576.27 kg ha-1) in the treatments stocked with A. mola and C. carpio than (298.91 kg ha-1) the treatment stocked with A. mola and B. gonionotus. However, the growth rate and survival rate of A. mola were always higher in treatment T1. Significantly (P<0.01) higher yield of grain and straw were obtained in the treatments with fish than without fish and they were found to increase over the control by 15.88-19.34% for grain and 12.78-15.34% for straw. The initial values (before rice transplantation) of soil pH, organic matter, total nitrogen, phosphorus and potassium contents did not show any significant difference among the treatments in most cases, but the final values (after harvest of rice and fish) of the same were recorded significantly higher in the treatments with fish than that of control (without fish) in most of the cases except pH.
  M.A.K. Azad , M.R. Rahman , Z. Rahman , M.A. Kader , M.M. Haque and M.J. Alam
  An experiment was conducted to evaluate the water quality, growth and production of fishes at different species compositions in polyculture using tilapia (Oreochromis niloticus), pangas (Pangasius hypophthalmus), mrigal (Cirrhinus mrigala) and silver carp (Hypophthalmichthys molitrix). The experiment was conducted for a period of 90 days from September 8, to December 7, 2002 at the Fisheries Faculty Field Laboratory of Bangladesh Agricultural University, Mymensingh. There were three treatments each with three replications. In all the treatments, the stocking density was 100 fish/decimal at different species compositions. All the ponds were subjected to same regime of feeding and fertilization. Fortnightly random sampling was done to adjust the feeding rate. In this experiment, mrigal showed the highest SGR (% per day) value (3.74) in T2. Tilapia showed the second highest (3.65) SGR (% per day) in T1. Specific growth rate (% per day) of pangas was comparatively lower in all treatments. Mean survival rates of various species ranged from 90.63 to 91.10%. Comparatively, tilapia showed the highest survival rate where pangas showed the lowest. T1 showed the highest survival rate but there was no significant variation among the treatments. Weight gain (g) of tilapia, pangas, mrigal and silver carp were 89.18, 30.61, 85.75 and 91.71 g in T1, 63.95, 37.24, 86.86 and 65.63 g in T2 and 70.84, 47.65, 70.42 and 72.87 g in T3, respectively. The highest and the lowest weight gain were found in T1. Silver carp attained maximum weight gain (91.71 g) in T1 where pangas showed the lowest (30.61g) in the same treatment. Among the treatments, the highest production was found in T1 (1974.02 kg/ha/90 days) which was significantly higher than other treatments. The production in T2 and T3 were 1405.59 and 1522.01 kg/ha/90 days but there was no significant variation between T2 and T3. Considering the above, pangas showed the lowest growth performance and production in all treatments compare with other species. From the findings of the present study, it can be said that polyculture of pangas with tilapia is not suitable, but it may be suitable with carps and for this further research is necessary.
  M.A.R. Faruk , M.M.R. Sarker , M.J. Alam and M.B. Kabir
  Prevalence of fish disease has negative economic impact on aquaculture but the extent of this impact is not well documented. In order to quantitative economic impact of fish disease on rural freshwater aquaculture, a questionnaire survey and Participatory Rural Appraisal (PRA) tools were used in five districts of Bangladesh namely Mymensingh, Comilla, Jessore, Natore and Dinajpur. The study was conducted from January to December 2003. A total of 500 fish farmers were interviewed and 25 PRA session were conducted. The present study indicated that there were average economic loss of Tk.20,615/ha/year (US$344) to farmers from fish diseases which was equivalent to approximately 15% of the actual production. These losses varied among different districts and with different size of farms. The average loss as high as Tk.26,817/ha/year (US$447) was observed in Comilla district followed by Dinajpur Tk.23,412 (US$390), Mymensingh Tk.19,685 (US$328), Jessore Tk.18,177 (US$303) and Natore Tk.15,037 (US$251). Fish production also varied among different districts. The average highest (19.2%) loss of actual production was seen in Comilla district while the lowest (7.9%) were observed with farmers from Natore district. In general, small size farms suffered from highest average loss (19.6%) than the bigger size farms (14% for medium and 11.2% for large farm). Prevalence of fish disease varied among different districts with highest prevalence (18.2%) was seen in Jessore followed by Comilla (13.4%), Mymensingh (11.4%), Dinajpur (10.4%) and Natore (5.6%).
  M.A.R. Faruk , M.J. Alam , M.M.R. Sarker and M.B. Kabir
  In order to examine the current status of fish disease and health management practices in rural freshwater aquaculture, a questionnaire survey and Participatory Rural Appraisal (PRA) tools were used in five districts of Bangladesh namely Mymensingh, Comilla, Jessore, Natore and Dinajpur. A total of 500 farmers were interviewed and 25 PRA sessions were conducted. Most of the farmers (87.8%) interviewed had disease problem in their fishponds. Prevalence of fish disease varied with districts and the size of farms. Average prevalence of fish disease was highest in Jessore district (18.2%) followed by Comilla (13.4%), Mymensingh (11.4%) and Dinajpur district (10.4%). Minimum prevalence (5.5%) was recorded from Natore district. Small farms (0.4 ha) suffered from high disease prevalence (13.8%) followed by medium (0.2-0.4 ha) and large (>0.4 ha) farms with 12.4 and 9.3% of diseases, respectively. The most prevalent disease was tail and fin rot (20.5%), followed by epizootic ulcerative syndrome or EUS (18.9%), nutritional diseases (15.3%), red spot (13.0%) and gill rot (12.3%). Other conditions like argulosis, dropsy and white spot were also reported by the farmers but with lower incidence. The diseases occurred mainly in the winter season. Overall, the knowledge of the farmers on basic fish health management was found very poor. Most of the farmers (83.8%) used treatment measures in response to particular disease problem. For disease treatment, 46% farmers used combination of lime and potassium permanganate, 22.4% farmer used only lime and about 10% farmer used lime and salt together. This study identified some fish health management related problems in rural aquaculture, such as lack of assistance, poor technical knowledge and lack of suitable therapeutics and their proper uses.
  B. Mondal , M.R. Rahman , M.J. Alam , A.R. Tarafder , M.A.B. Habib and M.A. Khaleque
  The experiment was conducted to evaluate the performance of organic nutrients of Unripe Tomato Juice (URTJ) added with 0.2 g L-1 urea and Bold Basal Medium (BBM) as standard, for growing of C. ellipsoidea in laboratory condition for three months. C. ellipsoidea was cultured four different concentrations such as 0.7, 1.4, 2.8 and 4.15 g L-1 URTJ with added 0.2 g L-1 urea and Bold Basal Medium for a period of 16 days. The initial cell density of C. elliposidea was 2.90x mL-1, which attained a maximum cell density of 108.03x mL-1 in BBM followed by 75.24x, 69.67x, 54.80xand 27.35x mL-1 in 2.8, 1.4, 0.7 and 4.15 g L-1 of URTJ media with added 0.2 g L-1 urea, respectively on the 12th day of culture. Similar trend was observed in case of optical density of C. ellipsoidea. The proximate composition of C. ellipsoidea cultured in URTJ media was analyzed and found that the ranges of crude protein, crude lipid, ash and moisture ranged from 22.39-39.91%, 3.66-5.19%, 10.10-11.11% and 8.15-9.45%, respectively. Results showed that growth of C. ellipsoidea was significantly (p<0.05) higher in the concentrations of 2.8 g L-1 of URTJ with added 0.2 g L-1 urea than other concentrations (0.7, 1.4 and 4.15 g L-1) of URTJ with added urea at the temperature of 29.04°C, dissolved oxygen of 5.71 mg L-1, pH of 8.08 and light intensity of 1583 luxm-2s-1
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