Cadmium and zinc concentrations in zooplankton in the subarctic region of the North Pacific
| Autor: | Tsuneyasu Hamanaka, Tokimi Tsujita |
|---|---|
| Rok vydání: | 1981 |
| Předmět: |
Pollution
Cadmium Range (biology) media_common.quotation_subject General Engineering Soil Science chemistry.chemical_element Pelagic zone Zinc Biology Oceanography biology.organism_classification Zooplankton Subarctic climate Crustacean chemistry General Earth and Planetary Sciences Earth-Surface Processes General Environmental Science media_common |
| Zdroj: | Journal of the Oceanographical Society of Japan. 37:160-172 |
| ISSN: | 1573-868X 0029-8131 |
| DOI: | 10.1007/bf02309053 |
| Popis: | Cadmium and zinc concentrations were determined in 10 species of pelagic zooplankton collected in the northern North Pacific, the Bering Sea, the Okhotsk Sea and off Hokkaido, during the summers of 1974–1976. The mean cadmium contents in euphausiids, copepods, and amphipods were 1.16µg/g dry wt (range: 0.36–2.17µg/g), 6.63µg/g (1.66–14.55µg/g), and 8.28µg/g (2.83–14.50µg/g), respectively. Cadmium in euphausiids was significantly lower in concentration than in the other two crustacean groups. The difference in cadmium levels among the crustacean groups is discussed on the basis of feeding habits and physiological characteristics of the zooplankton. Zinc levels in the crustaceans were similar, with values around 100µg/g (range: 59–195μg/g). Both cadmium and zinc concentrations in euphausiids taken from coastal waters off Hokkaido were significantly higher than those from the Bering Sea and the northern North Pacific. This trend may reflect coastal pollution rather than characteristics of the species. |
| Databáze: | OpenAIRE |
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