Methoxychlor alters hatching and larval startle response in the salamander Ambystoma macrodactylum

Eggs of salamander, Ambystoma macrodactylum, were exposed to methoxychlor at varying concentrations, and mortality and time-of-hatch were examined. In addition, post-hatch startle response of the larvae was evaluated. The experimental protocol is described. No mortality was observed at methoxychlor...

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Bibliographic Details
Published in:Bulletin of environmental contamination and toxicology 1997-11, Vol.59 (5), p.815-821
Main Authors: Ingermann, R.L. (University of Idaho, Moscow, ID.), Bencic, D.C, Eroschenko, V.P
Format: Article
Language:English
Subjects:
Ambystoma macrodactylum
Ambystoma mexicanum - embryology
Animal, plant and microbial ecology
Animals
Applied ecology
Biological and medical sciences
Caudata
ECLOSION
Ecotoxicology, biological effects of pollution
Effects of pollution and side effects of pesticides on vertebrates
Embryo, Nonmammalian - drug effects
Female
Fundamental and applied biological sciences. Psychology
HATCHING
Insecticides - toxicity
Larva - drug effects
METHOXYCHLOR
Methoxychlor - toxicity
METHOXYCHLORE
METOXICLORO
Reptilia. Amphibia
SALAMANDERS
SALAMANDRA
SALAMANDRE
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Summary:Eggs of salamander, Ambystoma macrodactylum, were exposed to methoxychlor at varying concentrations, and mortality and time-of-hatch were examined. In addition, post-hatch startle response of the larvae was evaluated. The experimental protocol is described. No mortality was observed at methoxychlor concentrations up to 10 mg/l, but concentrations at or above 0.1 mg/l promoted early hatching, which appeared to be due to precocial hatching rather than to accelerated development. Ten days post-hatch, embryos/larvae maintained in 0.3 mg methoxychlor/l or greater showed alterations in their startle response, but the condition was reversible after transfer to a clean environment.
ISSN:0007-4861
1432-0800
DOI:10.1007/s001289900554