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"The ranges of Hg in this study (1.3-9.7 µg/kg dry weight) were similar to those ranges reported by Philips et al. (1982); Prudente et al. (1999); Rojas de Astudillo et al. (2002); Tewari et al. (2001) and Liu and Kueh (2005). However, if compared with the ranges reported by Yap et al. (2003d) (3.9-50.0 µg/g dw), the present Hg levels were lower. "
[Show abstract][Hide abstract] ABSTRACT: The Straits of Johore is a hotspot area of metal pollution in the southern part of Peninsular
Malaysia. In this study, green-lipped mussels Perna viridis were collected from three sites from the
Straits of Johore in April 2011. The mussel tissues were dissected into eight parts including byssus,
crystalline style, foot, gill, gonad, mantle, muscle and remainder. The total shells and all the
dissected eight parts were determined for nine trace metal concentrations (Ag, As, Co, Cr, Cs, Hg,
Mn, Se and Sr) by using an Inductively Coupled Plasma-Mass Spectrometer, because these nine
trace metals are rarely reported in the literature from Malaysia. Based on the present data, Sr and
Mn have a very different accumulation pattern in mussels when compared with other trace metals.
It is also found that the byssus is highly accumulative of Co and Cr, while the shell is also highly
accumulative of for Sr. When compared to the metal levels reported in the literature, the present
data are considered low. Further studies are needed to confirm why Gelang Patah population had
the highest levels of Ag, As, Cs, Mn and Se when compared to Senibong and Pantai Lido, based
on some mussel parts. The present data in the different tissues of P. viridis are important for future
KEY WORDS : Trace metals, Perna viridis, The Straits of Johore.
"In order to clarify the above, it is apparent that a more powerful marker system is required and a single locus DNA microsatellite markers appears to be the best choice because of reproducibility, codominant inheritance, high levels of polymorphism, assay ability by PCR, conformity to Mendelian inheritance and selective neutrality. Therefore, the objective of this paper is to validate whether local populations of P. viridis collected from the coastal waters of peninsular Malaysia are genetically similar enough to be used as a biomonitoring agent for heavy metal contamination in the Straits of Malacca by using the more informative single locus DNA microsatellite markers compared to the findings by using allozymes (Yap et al. 2002). "
[Show abstract][Hide abstract] ABSTRACT: A total of 19 polymorphic microsatellite loci were used to analyse levels of genetic variation for 10 populations of Perna viridis L. collected from all over peninsular Malaysia. The populations involved in this study included Pulau Aman in Penang, Tanjung Rhu in Kedah, Bagan Tiang in Perak, Pulau Ketam in Selangor, Muar, Parit Jawa, Pantai Lido and Kampung Pasir Puteh in Johore, and Kuala Pontian and Nenasi in Pahang state. The number of alleles per locus ranged from two to seven, with an average of 3.1. Heterozygote deficiencies were observed across all the 10 populations. Characterization of the populations revealed that local populations of P. viridis in peninsular Malaysia were genetically similar enough to be used as a biomonitoring agent for heavy metal contamination in the Straits of Malacca. Cluster analysis grouped the P. viridis populations according to their geographical distributions with the exception of Parit Jawa. The analysis also revealed that P. viridis from the northern parts of peninsular Malaysia were found to be the most distant populations among the populations of mussels investigated and P. viridis from the eastern part of peninsular Malaysia were closer to the central and southern populations than to the northern populations.
Journal of Genetics 09/2009; 88(2):153-63. DOI:10.1007/s12041-009-0023-0 · 1.09 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: The concentrations of Cu, Pb, and Zn in the crystalline style (CS) and in the remaining soft tissues (ST) of the green-lipped mussel Perna viridis from 10 geographical sites along the coastal waters off peninsular Malaysia were determined. The CS, compared with the remaining ST, accumulated higher levels of Cu in both contaminated and uncontaminated samples, indicating that the style has a higher affinity for the essential Cu to bind with metallothioneins. The similar pattern of Cu accumulation in the different ST of mussels collected from clean and Cu-contaminated sites indicated that the detoxification capacity of the metallothioneins had not been overloaded. For Pb, higher levels of the metal in the CS than in the remaining ST were found only in mussels collected from a contaminated site at Kg. Pasir Puteh. This indicated a tissue redistribution of Pb due to its binding to metallothioneins for Pb detoxification and the potential of the CS as an indicator organ of Pb bioavailability and contamination. For Zn, the above two phenomena were not found since no obvious patterns were observed (lower levels of Zn in the CS than in the remaining ST) in contaminated and uncontaminated samples due to the mechanism of partial regulation. Generally, all the different STs studied (foot, mantle, gonad, CS, gill, muscle, and byssus) are good biomonitoring tissues for Cu and Pb bioavailabilities and contamination. Among these organs, the CS was found to be the best organ for biomonitoring Cu. The present data also suggest the use of the tissue redistribution of Pb in P. viridis as an indicator of Pb bioavailability and contamination in coastal waters.