Effects of parathion and 2,4-d to eggs incubation and larvae hatching in Chasmagnathus granulata (decapoda, brachyura)
1. Effects of the pesticides parathion and 2,4-d on the crab Chasmagnathus granulata during eggs incubation period were assessed. 2. Abortion of egg masses carried by the females occurred. 3. ec50 values for clutch loss were 34 μg/l for parathion and 7.4 mg/l for 2,4-d. 4. When hatching occurred, pa...
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| Autores principales: | , |
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| Formato: | JOUR |
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_03064492_v104_n1_p71_Rodriguez |
| Aporte de: |
| Sumario: | 1. Effects of the pesticides parathion and 2,4-d on the crab Chasmagnathus granulata during eggs incubation period were assessed. 2. Abortion of egg masses carried by the females occurred. 3. ec50 values for clutch loss were 34 μg/l for parathion and 7.4 mg/l for 2,4-d. 4. When hatching occurred, parathion reduced the number of larvae hatched per female, while 2,4-D did not. 5. Morphological abnormalities in hatched larvae, such as hidropsy and atrophy of eyes, pleon and dorsal spine, could be noted for both pesticides. While 2,4-d produced a higher global incidence of all of them, at 1 μg/l of parathion hidropsy and atrophy of eyes had a relative higher incidence than the other abnormalities. © 1993. |
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