Larval development of hermit crab Clibanarius longitarsus: Synergistic effect of heavy metals
| Autor: | Ajmal Khan, Somasundaran Lyla |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Larva
Hatching Ecology chemistry.chemical_element Aquatic animal Cell Biology Plant Science Zinc Biology Hermit crab biology.organism_classification Biochemistry Copper Animal science chemistry Genetics Animal Science and Zoology Molecular Biology Moulting Ecology Evolution Behavior and Systematics Shellfish |
| Zdroj: | Biologia. 65:714-719 |
| ISSN: | 1336-9563 0006-3088 |
| DOI: | 10.2478/s11756-010-0075-x |
| Popis: | The levels of heavy metals copper and zinc were found to be high in the Vellar estuary. Therefore their effects on the larval development of the abundant hermit crab Clibanarius longitarsus were studied individually and in combination from hatching till moulting to glaucothoe stage in the laboratory using freshly hatched Artemia nauplii as food. The 96 h LC50 values found with 100 larvae each kept in 10 different concentrations of copper and zinc (350, 300, 250, 200, 150, 100, 50, 25, 10 and 5 ppb) were 50 ppb for copper and 90 ppb for zinc. Based on these 96 h LC50 values, three sublethal concentrations were chosen for the metals copper and zinc at 50%, 25% and 10% levels of the LC50 values. With increase in concentration of the test medium, the survival rate decreased and the time required for the completion of each zoeal stage increased. Copper was found to be more toxic than zinc as the survival rate in copper concentrations was lower than those in zinc concentrations. The survival rate in the mixed concentrations of metals was lower than in individual concentrations. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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