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Articles by Mohd Salleh Kamarudin
Total Records ( 4 ) for Mohd Salleh Kamarudin
  Ehsan Ramezani-Fard , Mohd Salleh Kamarudin and Sharr Azni Harmin
  Production of large amounts of fish eggs with high quality is one of the major goals in aquaculture industry. All reproductive processes in fish are regulated by endocrine system. Numerous studies have been carried out in recent years in order to develop or improve egg production protocols. This study provides a summary of some recent advances regarding fish oocyte differentiation, maturation and ovulation stages. The oocyte growth stages including first and second growth stages, veitellogenesis and final growth stage and maturation are briefly explained. Recent advances on the hormonal systems which control the reproductive process and oocyte development are also highlighted.
  Ehsan Ramezani-Fard and Mohd Salleh Kamarudin
  For many years, fish oil has been used as the major source of lipid in aquafeed production. However, the replacement of this marine origin ingredient with a sustainable resource such as vegetable oils is critically important. On the other hand, most of the vegetable oils are high in omega-6 polyunsaturated fatty acids while a diet rich in these fatty acids can increase liver lipid deposition in some fish. This study was conducted to investigate the effects of partial or total replacement of fish oil with different vegetable oil sources (sunflower and palm) on the histological alterations in the liver and intestine of juvenile Malaysian mahseer, T. tambroides. Five isonitrogenous and isocaloric diets were formulated in order to either completely or partially (50%) substitute fish oil with sunflower oil or palm oil. A diet without substitution was also used as a control. The effects of these diets on the histological alterations of liver and intestine of fish after a nine week feeding period were investigated. The results showed few inflammatory cells and lipid vacuoles in the liver of fish fed all the vegetable oil diets indicating minor hepatic steatosis. Lipid vacuoles were also observed in the intestinal wall of fish fed all the vegetable oil diets.
  Jun Chin Teh , Mohd Salleh Kamarudin , Abdullah Abd-Rahim , Che Roos Saad and Ehsan Ramezani-Fard
  Providing a suitable feeding delivery method is very important in the studies of the feeding behavior of medicinal leeches. In this study, several materials and membranes were tested for their suitability as blood carrier for the feeding of Asian buffalo leech Hirudinaria manillensis. In the first experiment, four different materials (sheep intestine skin, cotton wool, cellulose sausage casing and rubber sacs) were prepared and filled or soaked with pre-warmed cattle blood. The food was offered to leeches stocked in 10 L aquaria at 10 leeches per aquarium. All treatments were triplicated. The results showed that cotton wool and sheep intestine skin had severe blood leakage while cellulose sausage casing failed to allow leech feeding. Leeches successfully imbibed the blood with no visible leakage through the rubber sacs. In the second experiment, different solutions (150 mM sodium chloride, distilled water and 6 mg L-1 heparinized cattle blood) were prepared into rubber sacs. Similar feeding protocols as in the first experiment were followed. Percentages of leech that approached the sacs and the average volume consumed per individual were estimated. A little or no feeding response was observed for the sacs filled with saline and distilled water. This indicated H. manillensis were able to detect the blood contained in the rubber sacs and successfully imbibed the blood. Therefore, the rubber sac was found to be suitable as the blood carrier for the feeding of buffalo leeches.
  Emy Yusliza Zolkefli , Sabarinah Sh Ahmad , Mohd Salleh Kamarudin , Che Roos Saad , Mohd Fakri Zaky Jaafar and Jamarei Othman
  This study was conducted to determine the thermal comfort conditions of a typical small-scaled enclosed freshwater prawn hatchery building. The thermal environment and comfort conditions were determined using in situ measurement for 12 continuous days and simulations. A small-scaled commercial hatchery at Sg Besar, Selangor was chosen for this study. The multi-data loggers were placed in selected area of hatchery building and the parameters measured were temperature (indoor, outdoor and water), light (indoor and water) and Relative Humidity (RH) (indoor and outdoor). The results showed that the indoor air temperature remained above comfort limit temperature (28.6°C) between 0900 and 1900 h beyond the working period (0700-1900 h). The water temperature remained above the optimal culture temperature (30°C) and reached the lethal limit (33°C) during the day. The average indoor relative humidity fell below outdoor relative humidity over the most of daytime and above the outdoor relative humidity at nighttime. The results indicated that daytime thermal environment in the hatchery building was extremely uncomfortable to the workers most of the time and at certain time could also detrimental to larval prawn growth.
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