| Summary: | 碩士 === 國立東華大學 === 海洋生物多樣性及演化研究所 === 96 === The aim of this study was made to compare heavy metal accumulation in fishes within Chiku Lagoon and Tapong Bay during the winter 2006. Because there are two main pathways for bioaccumulation of heavy metals into fish body (direct absorbtion from environmental water or from food chain), we intended to figure out correlation of species, body size, feeding habit, and accumulating organs of fishes. The results indicate that three groups of fish have been found with relative higher heavy metals concentration. The first group is benthic species, such as Liza macrolepis, Sillago sihama and Exyrias puntang. The second group is the small-size species, such as Leiognathus fasciatus, Ambassis urotaenia and Ambassis vachellii.The third group is the big-size and carnivorous species, such as Acanthopagrus berda, Eleutheronema tetradactylum and Lutjanus argentimaculatus. The accumulation of heavy metal of different fish species is related to several factors, including feeding and living habit, physical dilution, and the characteristics of non-essential element which will be easier transferred through the food chain. Bases on the relationships between metal concentration and the four tissues, the results indicated that the bioaccumulation of heavy metals in fishes from this two regions are much more affected by environmental condition than by the intake from of food chain.
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