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Poster De Conférence Année : 2017

Phenotypic defects in Gamamrus fossarum (Amphipoda) exposed to fenoxycarb as embryo

Effets phenotypiques d'une exposition au fénoxycarbe chez l'embryon de Gammarus fossarum (Amphipode)

Résumé

The use of embryos in ecotoxicology can be useful not only for understanding the mode of action of a toxic compound but also to detect subtle toxic effects as embryos could be the most vulnerable stages within the life history of an organism. Despite these advantages, ecotoxicological studies dealing with embryos of aquatic arthropods remained rare and many use hatching success as the endpoint of interest. The toxicity of environmental compounds in early life stages is of importance since embryo toxicity has been shown implicated in population decline. Since ontogeny is under the regulation of numerous morphogenetic factors and endocrine signaling pathways, toxic exposure experienced during embryogenesis could cause an increase of phenotypic defects in new-born individuals. This is the hypothesis we tested in the present study. For that purpose, embryos of the amphipod Gammarus fossarum were directly exposed throughout the entire embryo cycle to increasing fenoxycarb concentrations. Fenoxycarb is a growth regulator insecticide, analog of the arthropod juvenile hormone, used for controlling lepidopteran, mosquito, cockroach and bug. In the present study, three types of phenotypic defects were measured in newly hatched individuals from exposed embryos: i) eye pigmentation impairment, ii) appendage shape variations by geometric morphometrics and iii) tissue damages.
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Dates et versions

hal-02606520 , version 1 (16-05-2020)

Identifiants

Citer

H. Arambourou, Arnaud Chaumot, E. Vulliet, G. Daniele, N. Delorme, et al.. Phenotypic defects in Gamamrus fossarum (Amphipoda) exposed to fenoxycarb as embryo. SETAC Europe 27th annual meeting, May 2017, Bruxelles, Belgium. pp.1, 2017. ⟨hal-02606520⟩
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