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Articles by Hadi Hamli
Total Records ( 2 ) for Hadi Hamli
  Mohd Hanafi Idris , Hadi Hamli , Abu Hena Mustafa Kamal and Amy Halimah Rajaee
  Background and Objective: Meretrix lyrata is hard clam that is found abundantly at Kuching division in Sarawak and used as delicacy by the local people. This study aimed to determine amount of macro and micro-minerals in the soft tissue of M. lyrata. Materials and Methods: Macro and micro-minerals extracted from tissues of Meretrix lyrata, sediment and seawater were determined using air-acetylene flame Atomic Absorption Spectrophotometer (AAS). The minerals; Na, K, Mg, Ca, Zn, Cu, Mn and Fe were extracted from environment, adductor muscle, foot, gill, mantle and siphon from the clam. Concentration of macro and micro minerals were analysed using one way ANOVA and multivariate analysis. Results: The Na (319.552±9.47 μg g–1) and Fe (19.48±4.726 μg g–1) concentration were high in M. lyrata tissues compared to other elements. This result suggested that M. lyrata tend to accumulate more Na and Fe from the environment and this supported by high concentration of Na and Fe in the seawater. Furthermore, multivariate analysis indicated that tested tissues were grouped according to the mineral elements and not based on tissue variety. Therefore, macro and micro-minerals that accumulated in the M. lyrata tissues were non tissue dependent. Conclusion: The affinity of hard clam tissue to accumulate other elements was high and it depends on availability of the elements in the seawater. Hence, pristine environment was important to harvest hard clam as the food source to prevent consumption of unwanted elements such as heavy metals.
  Mohd Hanafi Idris , Azimah Abdul Rahim , Hadi Hamli , M.H. Nesarul and Abu Hena Mustafa Kamal
  Background and Objective: Mangrove clams are considered as food, collected from the nature. These species deserve special attention for its potentiality. This study was aimed to determine the generative activities of the mangrove clam Polymesoda expansa (Mousson, 1849) and relationship with water quality parameters. Materials and Methods: The reproductive biology of mangrove clam Polymesoda expansa (Mousson 1849) was investigated from October, 2010 to November, 2011 in Kelulit, Miri, Malaysia. Different gonad development stages were classified through histological method which was later on correlated with environmental variables through Pearson Correlation analysis. Results: It was observed that P. expansa is a dioecious clam. Five different gonad development stages in both males and females were identified. The Gonad Index (GI) indicated that gametogenesis began in November and by January onwards mature clams were found. Spawning season was identified all the year around mainly during September-December. The highest Gonad Index (GI) value was recorded in September, 2011 for females with 2.0 and it was 1.7 for males in March and November 2011. However, there was no significant difference (p>0.05) in Gonad Index (GI) between the males and females when it was confirmed by Kruskal-Wallis non parametric test. The monthly recorded physico-chemical parameters of estuarine water at sampling site were 2.79±3.15 psu, 5.46±1.34, 29.4±1.3°C, 2.73±1.09 mg L–1 and 283.5±150.5 mm for salinity, pH, temperature, Dissolved Oxygen (DO) and rainfall, respectively. Conclusion: The information gathered from this study indicated that P. expansa is dioecious animal and has continuous gametogenic development through a year. Therefore, P. expansa is able to spawn all the year around regardless on water parameters changes in the habitat.
 
 
 
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