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Articles by Ambok Bolong Abol-Munafi
Total Records ( 4 ) for Ambok Bolong Abol-Munafi
  Mhd Ikhwanuddin , Mohd-Fadhil Adnan , Syahnon Mohamad and Ambok Bolong Abol-Munafi
  Background and Objective: The development of domesticated crab is an important aspect for further sustain ability of seed production and broodstock enhancement. An induction of gonad maturation is important to increase the broodstock used for hatchery seed production. This study was designed to determine the effect of eyestalk ablation on the ovarian maturation stages in P. pelagicus in term of the gonadosomatic index (GSI), mean of oocyte diameter and then were compared using one-way analysis of variance. Materials and Methods: Three group of treatments were set up included control (without any eyestalk ablation), unilateral and bilateral eyestalk ablation. Crabs were then cultured for 30 days in the culture rearing tank systems immediately after ablation and GSI with mean of oocyte diameter were calculated. Results: Mean value of GSI was 2.21, 3.39 and 3.31% in control, unilateral eyestalk ablated and bilateral eyestalk ablated, respectively. In addition, the oocyte development was 175.77, 187.44 and 214.08 μm, respectively. Statistical analysis did not show any difference obtained in GSI of control, unilateral and bilateral ablated (p>0.05) but statistically different (p<0.05) found in oocyte diameter. Conclusion: It was concluded that eyestalk ablation affected the oocyte diameter of ovarian maturation stages of P. pelagicus.
  Mhd Ikhwanuddin and Ambok Bolong Abol-Munafi
  The human demand for fish protein is increasing daily with continuous growth of the global population and economy. Due to the low harvests of wild-caught fish in conjunction with high human fish consumption, aquaculture presents the most effective solution for enhancing the production of fish protein. However, most fish and shellfish hatcheries fully depend on wild-caught broodstock for seed production. The most effective way to resolve this issue is by enhancing the development of domesticated broodstock. Domesticated broodstock would ensure a consistent production of seed for further breeding and stock enhancement programs. Herein, the present perspective describes an important aspect of the current development of domesticated broodstock for future stock enhancement of fish and shellfish in hatchery seed production. The following characteristics were chosen for domestication of species: High market value (either as food or as ornamental), commercially important for fisheries/aquaculture, threatened or endangered, easy to culture, desirable production traits, disease resistant, viral pathogen-free, ability to utilize various food types and have environmental tolerance. The selection of broodstock source is vital for domestication program, as this is the first step for culturing the selected fish and shellfish species. Genetically improved broodstock are usually used in domestication programs along with optimum feeding strategies and space for improved hatchery production. There are many advantages of domestication, particularly for sustainable food protein as well as for future stock-enhancement programs for newly cultured aquatic species. In conclusion, the success in domestication primarily depends on the knowledge of basic fish and shellfish biology.
  Normala Jalil , Mohd Azizul Alim , Ambok Bolong Abol-Munafi , Nur Asma Ariffin , Khor Waiho and Shahreza Md Sheriff
  Objective: A study was done to characterize the erythrocyte of triploid African catfish. Methodology: Triploid African catfish Clarias gariepinus fingerlings were produced via cold shock method and their erythrocyte profiles were compared with normal diploid controls. Results: Approximately 99% of triploid erythrocytes were ellipsoidal whereas 97.5% of the diploid erythrocytes were round in shape. All of the erythrocyte parameters showed significant higher values in triploids and exhibited size range exclusive to triploids except erythrocyte cellular volume. The nuclear volume and nuclear area were among the two erythrocyte parameters that showed the largest increment in triploids (76.6 and 55.3%, respectively) with their respective exclusive triploid range at 74.3-150.2 and 22.8-35.2 :m. Both erythrocyte and nuclear major axis increased at a much higher percentage with respect to erythrocyte and nuclear minor axis in triploid specimens, resulting in the ellipsoidal shape of triploid’s erythrocytes. The erythrocyte major axis also has the highest percentage (76.0%) of erythrocytes that fall in the exclusive triploid range (11.9-14.9 μm) compared to the other erythrocyte parameters. Conclusion: Therefore, it is suggested that determination of triploid African catfish can be performed solely based on the measurement of erythrocyte major axis.
  Sohel Mian , Sumi Dash Papree , Tanwi Dey , Mohammad Amzad Hossain , Mohammed Mahbub Iqbal , Ambok Bolong Abol-Munafi and M. Sadiqul Islam
  Background and Objective: Proper knowledge on reproductive biology is important for the successful management of fisheries, aquaculture and conservation of a target species in the wild. The present study was investigated to uncover the reproductive biological information including the spawning season of Xenentodon cancila . Materials and Methods: About 325 Xenentodon cancila samples were collected from the waters of North-East Bangladesh for a period of 1 year. Data on length, weight, sex ratio, condition factor, fecundity and Gonado Somatic Index (GSI) were recorded to uncover the breeding biology of this fish in wild condition. Results: The length ranged between 20.20-23.91 cm (Mean±SD = 20.57±2.59) and their weight ranged between 19.70-43.85 g (Mean±SD = 30.22±8.12). Females were dominant in larger length groups being most apparent during the resting phase of reproductive cycle and in the peak of the spawning period, occurring in the month of June. The sexual ratio of all specimens was m/f = 1:1.11. The mean batch fecundity was 1789.69±347.06 of matured oocytes per ovary. Gonado somatic index data showed continuously increasing trend during the months of January-April until it reaches to the peak in June and followed by gradually decreasing in the months of September-November. Conclusion: On the basis of the collected data, it can be concluded that spawning season for this fish in wild ranged from April-August while peak in June in weather condition of North-East Bangladesh.
 
 
 
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