Experiences with Some Toxic and Relatively Accessible Heavy Metals on the Survival and Biomass Production of Amphora costataW. Smith

doi:2006.21.4.471

Algae > Volume 21(4); 2006 > Article

Algae 2006;21(4): 471-477. doi: https://doi.org/10.4490/algae.2006.21.4.471

Subir Kumar Mandal¹^,3^*, Hemantkumar Vithaldas Joshi², Devabratta Chandrashanker Bhatt², Bhavanath Jha³ and Takashi Ishimaru¹

¹Faculty of Marine Science, Tokyo University of Marine Science and Technology, 5-7 Konan 4, Minato-ku, Tokyo 108-8477, Japan
²Department of Marine Science, Bhavnagar University, Bhavnagar-364002, Gujarat, India
³Marine Algae and Marine Environment Division, CSMCRI, Bhavnagar-364002, Gujarat, India

ABSTRACT

Amphora costata W. Smith 1853 is a down thrown diatom species and also known as metal corrosive ship-fouling organism. A. costata was isolated from Alang ship breaking yard, Alang and evaluated the toxicity tolerance and growth responses of the cultures exposed to different doses of toxic and relatively accessible heavy metals, such as Fe, Mn, Cd, Co, Cu, Zn, Ni, and Pb in the constantly monitored laboratory culture conditions. The strongest toxic effect was observed on A. costata exposed to Cd even at relatively low concentrations as compared to other metals . The following trend of decreasing order of toxicity i.e. Cd>Zn>Ni>Co>Pb>Cu>Fe was observed, when they were exposed to equal concentration and expose time.

Key words: Amphora costata, benthic diatoms, heavy metal, micro algae, toxicity