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Concentration of organochlorine in egg yolk and reproductive success of Egretta garzetta (Linnaeus, 1758) at Wat Tan-en non-hunting area, Phra Nakhorn Si Ayuthaya Province, Thailand.
- Source :
-
Ecotoxicology and environmental safety [Ecotoxicol Environ Saf] 2007 Sep; Vol. 68 (1), pp. 79-83. Date of Electronic Publication: 2006 Nov 01. - Publication Year :
- 2007
-
Abstract
- Contaminant analyses in animal eggs have illustrated the benefit of wildlife as indicators of xenobiotic contamination in natural habitats. In 2002, concentrations of 16 organochlorine insecticides were measured in egg yolk and the reproductive success of the little egret, Egretta garzetta, was studied in a population at Wat Tan-en non-hunting area Bang Pahan District, Phra Nakhorn Si Ayuthaya Province, Thailand. Only 4,4'-dichloro diphenylethane (4,4'-DDE) was detected in the yolk of all samples (n=12) at the concentrations ranging from 33.4 to 116.0 ng/gwetwt. Mean eggshell thickness (n=24) was 0.261+/-0.005 mm. Relationships between the concentrations of 4,4'-DDE and eggshell thickness as well as the reproductive success at all stages were not found (P>0.05). Rather, major factors potentially influencing the decline of reproductive success observed during the field study may include strong wind, predators, intraspecific and interspecific competitions.
- Subjects :
- Animals
Clutch Size drug effects
Dichlorodiphenyl Dichloroethylene analysis
Dichlorodiphenyl Dichloroethylene toxicity
Egg Shell drug effects
Egg Shell pathology
Environmental Monitoring
Female
Hydrocarbons, Chlorinated toxicity
Insecticides toxicity
Reproduction drug effects
Thailand
Water Pollutants, Chemical toxicity
Birds physiology
Egg Yolk chemistry
Hydrocarbons, Chlorinated analysis
Insecticides analysis
Reproduction physiology
Water Pollutants, Chemical analysis
Subjects
Details
- Language :
- English
- ISSN :
- 0147-6513
- Volume :
- 68
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Ecotoxicology and environmental safety
- Publication Type :
- Academic Journal
- Accession number :
- 17081607
- Full Text :
- https://doi.org/10.1016/j.ecoenv.2006.08.004