150 research outputs found
Byssus of the green-lipped mussel Perna viridis (Linnaeus) as a biomonitoring material for Zn
No full textRecently, Yap
et al.
(2003) suggested that the byssus of the green-lipped mussel
Perna viridis
can
be a biomonitoring material for Zn although further validation is required. In this work, we did a simple correlation
study between Zn concentrations in the byssus (and soft tissue) and in different geochemical fractions of
the sediment. A significant (P<0.01) Pearson’s correlation coefficient (R=0.84) between the Zn concentrations
in the byssus and soft tissue indicated that the Zn level in the byssus is highly correlated to its level in the
soft tissue and that the byssus could act as an excretion route for Zn. Higher R-values were found between the
byssus–easily or freely, leachable and exchangeable, byssus–acid-reducible, byssus–oxidizable-organic and
byssus–nonresistant fractions of the sediment, and the byssus–Zn concentration in the total sediment when
compared to those found between the soft tissue and the same geochemical fractions. This indicated that the byssus
was more reflective of Zn contamination in the field environment than the soft tissue. Therefore, the data further
support the use of the byssus as a biomonitoring material for Zn as was originally suggested by Yap
et al
Ni, Pb and Zn concentrations in the green-lipped mussel, Perna viridis collected from the northern coastal waters of Peninsular Malaysia
No full textContinuous monitoring of heavy metal bioavailabilities and contamination in the marine environment by the Mussel Watch Program has been proposed in order to maintain the coastal environment at a sustainable level. This study focused on the heavy metal concentrations in different parts of P. viridis collected from Kuala Perlis (Perlis), Kg. Pulau Sayak (Kedah), Pantai Sri Tujoh and Pantai Bisikan Bayu (both in Kelantan). The results indicated that the accumulation of Ni, Pb and Zn by the byssus were significantly different from the rest of the tissues. In particular, the accumulation of Cu by the crystalline style was significantly higher (P <0.05) from the other tissues. The above two findings were similar to those reported by Yap et al. (2005) and Yap et al. (2006a). However, the concentrations of Ni, Pb and Zn found in different parts of P. viridis were generally lower than those reported by Yap et al. (2006a) for the polluted eastern part of the semi-enclosed ecosystem in the Straits of Johore. The present findings are important in providing metal baseline information prior to the start of the newly launch Economic Development Corridor (NEDC) project
The impact of anthropogenic activities on heavy metal (Cd, Cu, Ph and Zn) pollution: Comparison of the metal levels in the green-lipped mussel perna viridis (Linnaeus) and in the sediment from a high activity site at Kg. Pasir Puteh and a relatively low activity site at Pasir Panjang
No full textIt has been a common practice to select different environmental backgrounds in biomonitoring
studies of heavy metal contamination (Yap et al. 2002a; 2002b; 2003a; 2003b). It is expected to obtain
different pollutant concentrations in a selected biomonitoring agent. An interesting question that
may arise here is 'Are all heavy metal levels high in a known high human activity sampling site ?' This
question comes to mind since most researchers would assume a positive answer while ecotoxicologists
would like to know which metal(s) is(are) high (maybe not all heavy metals) at that sampling site.
The environmental background is closely related to the description of the sampling site which can
range from an uncontaminated or pristine site to a highly contaminated site that is known to receive
a lot of anthropogenic inputs
Changes of Allozymes (GOT, EST and ME) of Perna viridis Subjected to Zinc Stress: A Laboratory Study
No full textIt had been documented through electrophoretic studies that allozyme polymorphisms of bivalve populations are affected by heavy metal stress. In the present laboratory study, by using P. viridis as a test organism, the results indicated that changes in the enzymes GOT, EST and ME were due to Zn stress which are complemented by reductions of filtration rate and condition index. However, it is not yet known for sure whether the enzymes GOT, EST and ME are inducing behavioural and other changes in P. viridis. This is because of the possible subtle interactions could occur between different environmental stresses
Heavy metal pollution in the Juru river basin receiving industrial effluents : the need for biochemical and molecular studies in the edible cockles Anadara granosa.
No full textA study on the potential of the periostracum of perna viridis as a biomonitoring material for Pb in tropical coastal waters based on correlation analysis
No full textThe periostracum is the outermost layer overlying the inner prismatic and nacreous layers of the shells of bivalves. In the present study, the distributions of Cd and Pb in the soft tissues (ST) and periostracum of the green-lipped mussel Perna viridis sampled from 15 sampling sites in the coastal waters of Peninsular Malaysia were determined. The concentrations of Cd (0.21-10.87 mg/g dry weight) and Pb (1.16-40.20 mg/g dry weight) in the periostracum were generally higher than those in the ST (Cd: 0.10-5.55 mg/g dry weight; Pb: 2.53-18.62 mg/g dry weight). Based on correlation analysis from nine geographical populations, the higher correlation coefficients (R values) between the periostracum-geochemical fractions of the sediments than between the ST-geochemical fractions of the sediments indicated that the periostracum could be a potential biomonitoring material for Pb. Hence, the present results supported the use of the periostracum of P. viridis as a potential biomonitoring material for Pb but not for Cd. However, more studies are warranted to verify its usefulness for the biomonitoring of heavy metal pollution in tropical coastal water
Multivariate analysis of heavy metal concentrations in the different tissues of four intertidal clams from Peninsular Malaysia
No full textFour species of clams (Macoma sp., Siliqua sp., Pharus sp. and Mactra sp.) were collected from the intertidal area of Peninsular Malaysia, Their different soft tissues (siphon, muscle, foot, mantle, gill and remaining soft tissues), and shells were analyzed for the concentrations of Cd, Cu, Fe, Ni, Pb and Zn. The relationships of heavy metals in the different tissues of clams were detennined using multivariate analyses including correlation analysis, cluster analysis and multiple linear stepwise regression analysis (MLSRA). Metal distribution in the clams were explained using correlation analysis, which indicated that the shell was not signihcantly (P> 0.05) correlated with other tissues and the shell is also clustered differently from the rest of soft tissues as indicated by the cluster analysis. Among the soft tissues, it was found that the gills and mantle of all clams were identified as the most influential tissues in the accumulation of heavy metals in the total soft tissues for the clams by MLSRA, The present study found that the distributions of heavy metals in the different tissues of clams were related to their differences in biological and ecological aspects. Since the multivariate analyses used in this study can reduce the cost and time involved in identifying an effective tissue to monitor the heavy metal(s) bioavailability and contamination (Yap et al. 2010), this preliminary finding provided an altemative for future environmental management in the intertidal area of Peninsular Malaysia
Biomonitoring of heavy metals in the west coastal waters of Peninsular Malaysia using the green-lipped mussel perna viridis: Present status and what next?
No full textThis paper aims to review the papers published using Perna viridis as a biomonitoring agent of heavy metals in this region and particularly from Malaysia and to discuss the existing knowledge. Further research which will enhance our understanding and increase our knowledge on heavy metal ecotoxicology in Malaysia by using P. viridis is also suggested. This can be part of Mussel Watch monitoring program in this region. The work in establishing P. viridis for the biomonitoring of heavy metals, which is fundamentally based on the recommended criteria for a good biomonitoring agent, can be applied in other mollusks species
Similarities and differences of metal distributions in the tissues of molluscs by using multivariate analyses
No full textMultivariate analysis including correlation, multiple stepwise linear regression, and cluster analyses were applied to investigate the heavy metal concentrations (Cd, Cu, Fe, Ni, Pb, and Zn) in the different parts of bivalves and gastropods. It was also aimed to distinguish statistically the differences between the marine bivalves and the gastropods with regards to the accumulation of heavy metals in the different tissues. The different parts of four species of bivalves and four species of gastropods were obtained and analyzed for heavy metals. The multivariate analyses were then applied on the data. From the multivariate analyses conducted, there were correlations found between the soft tissues of bivalves and gastropods, but none was found between the shells and the soft tissues of most of the molluscs (except for Cerithidea obtusa and Puglina cochlidium). The significant correlations (P < 0.05) found between the soft tissues were further complemented by the multiple stepwise linear regressions where heavy metals in the total soft tissues were influenced by the accumulation in the different types of soft tissues. The present study found that the distributions of heavy metals in the different parts of molluscs were related to their feeding habits and living habitats. The statistical approaches proposed in this study are recommended for use in biomonitoring studies, since multivariate analyses can reduce the cost and time involved in identifying an effective tissue to monitor the heavy metal(s) bioavailability and contamination in tropical coastal waters
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