Study of concentration of heavy metals (Lead ,Copper, Zink & Chromium ) in Soft tissues of marine Gastropod Thais mutabilis in intertidal zone of Bandar Abbass

To determine the heavy metals Zinc, Lead, Chromium and Copper in soft tissues of Thais mutabilis (gastropod) in three transect of tidal coast of Bandar Abbas, sampling was done in winter of 1389 (2011). Each Transect had three stations; Upper, mid and lower tidal zone. Sampling was done randomly with 0.5 square meter quadrate. Each area was sampled 9 times. The samples were analyzed for determination of heavy metals (Zn, Pb, Cr, Cu). The results showed that in the gastropod, zinc (577/18 ±438.9 ppm) was at the highest concentration between the heavy metals and Lead (0/17±0/6 ppm) was at the lowest. Generally, the highest concentration of Zinc (9/438±18/577), Lead (8/0±67/0) and Chromium (8/0±23/1) in soft tissues of gastropod was in Golshahr jonobi station, and the highest concentration of copper (6/134±77/88) was in the Posht shahr station. Statistical analysis showed that there was a significant difference (P≤0/05) in the concentration of chromium metal in soft tissue of gastropod in Golshahr jonobi transect with Soro. However, there is no significant difference between the concentrations of lead, copper and zinc in samples of soft tissue of gastropod in each transect (P≥0/05). The concentration of lead and chromium in this aquatic environment is lower than admissible range (WHO, 1985). It shows that the input of pollution containing these metals to this environment is low. The concentration of heavy metals such as zinc and copper is higher than admissible range (WHO, 1985) in every 3 transect. The result of bioaccumulation of heavy metals (Zink, Lead, Copper, and Chromium) in soft tissues of Thais mutabilis (Gastropoda) exhibited the following order: Zn> Cu> Cr >Pb.