Resumen

PEREZ-CRUZ, Yanet Guadalupe; RANGEL-RUIZ, Luis José  y  GAMBOA-AGUILAR, Jaquelina. Metals in clams and sediments in the marshes of Centla Biosphere Reserve, Tabasco, México. Hidrobiológica [online]. 2013, vol.23, n.1, pp.01-08. ISSN 0188-8897.

Concentrations of Cadmium, Chromium, Nickel, Lead and Vanadium in sediments (total and bioavailable) and clams (Lampsilis tampicoensis, Potamilus alata, Pyganodon grandis, Polymesoda arctata y Rangia cuneata) were determined by the method of Rantala and Loring (1975; IAEA, 1984) in four lakes and six rivers of the Marshes of Centla Biosphere (RBPC) Tabasco. Metals that exceeded the maximum permissible limits (as Long et al., 1995) in sediments were: Cd total (1.28 ± 0.77 µg g^-1), Ni total (107.51 ± 23.02 µg g^-1), Pb total (44.50 ± 18.97 µg g^-1) and V total (48.98 ± 6.88 µg g^-1); in clams (as Nauen 1983): Cd (0.28 ± 0.13 µg g^-1), Cr (4.27 ± 2.29 µg g^-1), Ni (2.83 ± 2.33 µg g^-1), (2.29 ± 1.10 µg g^-1) and V (1.85 ± 1.15 µg g^-1).

Palabras llave : Metals; Mexico; mollusks; marshes of Centla.

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