Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2007.1257.1263Oreochromis niloticus Fish]]> MattaCecil A. M. KheirallahAbdel-Moneim AbdelmeguidNabila E. M. Abdel-MoneimAshraf 82007108In the present report, we have determined the gonadal free amino acid compositions in Oreochromis niloticus collected from three sites in Lake Mariut: SE basin (less polluted), main basin (moderately polluted) and SW basin (highly polluted), in an attempt to develop sensitive biomarker to evaluate pollution effects from multiple sources. Variations of free amino acids (FAAs) were apparent in the polluted sites; total FAAs in testes and ovaries exhibited significant increases as compared to the less polluted site. This increase was attributed to increases in all individual amino acids including essential and non-essential ones. ANOVA indicated significant changes in all testicular FAAs, excluding phenylalanine. Levels of non-essential amino acids showed obvious alterations in ovaries. However, the increase in most essential amino acids, although insignificant, yet it was quite observable. In addition, the ratio of essential to non-essential amino acids was insignificantly decreased in gonads. This may be indicative of changes in protein metabolism.]]>Abdelmeguid, N., A.M. Kheirallah, Abou-Shabana, K. Adham and A. Abdel-Moneim,2002Tilapia zilii G. as a consequence of water pollution.]]>2224229Adham, K., A. Kheirallah, Abou-Shabana, N. Abdelmeguid and A. Abdel-Moneim,1997Tilapia zillii Gerv.]]>3225852598Adham, K.G., S.S. Hamed, H.M. Ibrahim and R.A. Saleh,2002Oreochromis niloticus (Linnaeus, 1757), from polluted waters.]]>29278288Ahmad, F., S.S. Ali and and A. Shakoori,1995Ctenopharyngodon idella.]]>43151159Bhagyalakshmi, A., P.S. Reddy and R. Ramamurthi,1983Oziotelphusa senex senex Fabricius, During Acute and Chronic Sumithion Intoxication.]]>178993Carballo, M., J.A. Jimenez, Ana de la Torre, J. Roset and M.J. Muņoz,2005Cyprinus carpio) and barbel (Barbus bocagei) along the Tajo River.]]>20119125Carr, R.S., R.E. Hillmann and J.M. Neff,1991226167De Smet, H. and R. Blust,2001Cyprinus carpio during cadmium exposure.]]>48255262Duffy, L.K., E. Scofield, T. Rodgers, M. Patton and R.T. Bowyer,1999124181186El-Dib, M.A., I.A. El-Elaimy, A. Kotb and S.H. Elowa,1996in vivo metabolism of malathion in male Tilapia nilotica.]]>57667674El-Gendy, K.S., N.M. Aly and A.H. El-Sebae,1998Tilapia nilotica).]]>33135 149El-Rayis, O.A. and M.A.H. Saad,199011726El-Rayis, O.A. and M.A. El-Sabrouti,1998231628El-Sharkawi, F.M.,19911991pp: 161177Ghazaly, K.S.,1991Tilapia zillii.]]>100417421Gilles, R.,197078313326Hassanein, H.M., M.A. Banhawy, F.M. Soliman, S.A. Abdel-Rehim, W.E. Muller and H.C. Schroder,1999Oreochromis niloticus.]]>377884Heikkila, J.J., G.A. Schultz, K. Iatrou and L. Gedamu,19822571200012005Hilmy, A.M., N.A. el Domiaty, A.Y. Daabees and A. Alsarha,1987Clarias lazera of copper and zinc applied jointly.]]>87309314Larsson, A., C. Haux and M.L. Sjobeck,19859250281Leatherland, J.F., J.S. Ballatyne and G. van der Draak,19981998WallingfordWallingfordSaad, M.A.H.,20032003pp: 8185Mikhopadhyay, P.K. and P.V. Dehadrai,1980Clarias batrachus (Linn) exposed to malathion.]]>22149158Misra, S., M. Zafarullah, J. Price-Haughey and L. Gedamu,19891007325333Philip, G.H. and B.M. Rajasree,1996Cyprinus carpio.]]>34174179Powell, E.N., M. Kasschau, E. Chen, M. Koenig and J. Pecon,1982Crassostrea virginica.]]>71591598Reddy, P.M. and M. Bashamohideen,1995Cyprinus carpio, during sublethal concentration of cypermethrin.]]>36183190Sahana, S.S., S. Jana, M.A. Choudhuri and D.K. Choudhuri,1986Clarias batrachus.]]>358185Saleh, H., H. Hamza and B.S. El-Baghdadi,1983Tilapia zillii Gerv.]]>135976Sivarama-Krishna, B. and K. Radhakris-Hnaiah,1998Cyprinus carpio (Linnaeus).]]>19111117Sreedevi, P., B. Sivaramakrishna, A. Suresh and K. Radhakrishnaiah,1992Cyprinus carpio L.]]>775963Stryer, L.,1981pp: 949pp: 949Tang-Chun, W.U., Ye Yuan, B.I. Yong-Yi, H.E. Man-Zhen and Guo-Gao Zhang,199840203206Theodorakis, N.G. and R.I. Morimoto,1987743574368Triebskorn, R., S. Adam, H. Casper, W. Honnen and M. Pawert et al.,200211451465Vijayan, M.M., C. Pereira, G. Kruzynski and G.K. Iwama,199840101108Williams, J.H., A.M. Farag, M.A. Stransbury, P.A. Young, H.L. Bergman and N.S. Petersen,19961513241328Wood, A.W. and G. Van Der Kraak,200365219227