Die subletale effekte van die organochloriede dieldrien en lindaan op groei en voortplanting van Eudrilus eugeniae en Eisenia fetida (Oligochaeta)
| Autor: | Editorial Office |
|---|---|
| Rok vydání: | 1994 |
| Zdroj: | Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie. 13:21-24 |
| ISSN: | 2222-4173 0254-3486 |
| DOI: | 10.4102/satnt.v13i1.577 |
| Popis: | Experimental exposure of the earthworm species Eudrilus eugeniae to organochlorines showed that dieldrin causes damage to sperm ultrastructure when viewed electronmicroscopically. Worms containing concentrations of 7,27 mg/kg dieldrin and higher showed more than 10% sperm damage. Exposure of Eisenia fetida to sublethal concentrations of lindane did not result in sperm damage but demonstrated an increase in growth and reproductive activity. It is argued that quantification of sperm damage and correlation with pesticide concentration could provide a useful tool for evaluating environmental quality. Furthermore, the effects of sublethal concentrations of pesticides that manifest themselves in increased growth and reproductive activity could affect ecological balances. |
| Databáze: | OpenAIRE |
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