Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2015.204.214MohammadSamya Hussein52015185The quality requisites of shellfishes are primarily dependent on the water quality, assuring a healthy product and a safe consumption. Water (moisture) content of five species from two different environments was conducted for a period of one year (July, 2010-June, 2011) for this purpose. Among the most exploitable and economically important Egyptian species, three brackish (the bivalves Cerastoderma glaucum, Fulvia fragilis and the gastropod Thais carinifera) and two salt water (the bivalves Donax semistriatus and Donax trunculus) shellfishes were chosen. Estimation on monthly basis revealed the incompatibility of moisture content with spawning period. Present results proved that water content varied according to the environmental factors rather than spawning seasons. Marine species had lower demand of water than brackish species. The differences in the average of the body water content between genera [Donax sp. (0.13), C. glaucum (0.75), F. fragilis (2.35) and T. carinifera (3.68)] was greater than that within the same genus [D. semistriatus (0.10) and D. trunculus (0.16)]. The gastropod T. carinifera had higher water content than the bivalves. Hierarchical clusters analysis was a good tool to differentiate moisture content between genera, as well as between species from different environments. The present study put in the perception of the probability of use water content in discrimination and classification between species.]]>Ali, E.M., S.H. Mohammad, S.Z. Mohamed and M.A. Aamer,2009Donax trunculus (Mollusca: Bivalvia ) in port said, Mediterranean Coast, Egypt.]]>36243259Alkaradawe, R.M.I.,20142014Alkaradawe, R.M.I., S.H. Mohammad, S.Z. Mohamed and Z.S. Morsy,2014Donax semistriatus and Donax trunculus (Mollusca: Bivalvia) in Idku, Egypt.]]>182548Gharsallah, I.H., P. Vasconcelos, N. Zamouri-Langar and H. Missaoui,2010Hexaplex trunculus (Gastropoda: Muricidae) from Bizerte lagoon, Northern Tunisia.]]>10155166Gofas, S., J. Le Renard and P. Bouchet,20012001pp: 180-213pp: 180-213Goud, J. and C. Mifsud,2009Fulvia fragilis (Forsskal in Niebuhr, 1775) (Bivalvia: Cardiidae), an alien species new to the Maltese malacofauna.]]>4389391Houart, R.,2001Pages: 227Pages: 227Ine, P.,1986Pages: 224Pages: 224Jayabal, R. and M. Kalyani,1987Meretrix meretrix (L.).]]>206569Leiva, G.E. and J.C. Castilla,200111283300Machreki-Ajmi, M., T. Rebai and A. Hamza-Chaffai,2013Cerastoderma glaucum from the Gulf of Gabes area (Southeastern Tunisia).]]>32733738Manhas, P., S. Langer and G. Singh,2013Paratelphusa masoniana (Henderson) (female), an edible freshwater crab from Jammu region of j&k (India).]]>1245251Mohammad, S.H.,2002Cerastoderma glaucum and Papyridea papyracea, in Lake Timsah, Suez canal.]]>2002Mohammad, S.H., M.E. Mohallal, S.Z. Mohammed and M.N. Attia,2006Cerastoderma glaucum and Papyridea papyracea in Lake Timsah, Suez Canal.]]>12532Ogogo, A.U.,2004Pages: 200Pages: 200Ozturk, B. and J.M. Poutiers,2005Fulvia fragilis (Bivalvia: Cardiidae): A lessepsian mollusc species from Izmir bay (Aegean sea).]]>85351356Radwan, N.A., S.H. Mohammad, S.Z. Mohammed and A.E. Yaseen,2009135367Rifi, M., G. Le Pennec, M.B. Salem and J. Ben Soissi,2011Fulvia fragilis in the Bay of Tunis (Tunisia).]]>9114651475Riley, R.T.,1976Crassostrea gigas, during starvation.]]>658490Ruiz, J.L. and M.M. Souza,2008151399406Streftaris, N., A. Zenetos and E. Papathanassiou,200543419453Taylor, A.C. and J.J. Venn,1979Chlamys opercularis, from the Clyde sea area.]]>59605621Udoh, J.P. and N.O. Abiaobo,2014Thais coronata, off cross river estuary, Nigeria.]]>232431Yonge, C.M.,198233735777Zenetos, A., S. Gofas, G. Russo and J. Templado,2003Vol. 3,