J. Bouchard, Effects of well known carcinogenic polyaromatic hydrocarbons absorbed withdiet on three species of locusts, ANN SCI N Z, 20(2), 1999, pp. 53-66
Citations number
47
Categorie Soggetti
Animal Sciences
Journal title
ANNALES DES SCIENCES NATURELLES-ZOOLOGIE ET BIOLOGIE ANIMALE
In a first approach to studying the effects of air pollutants, we describe
some experimental results obtained after ingestion of polyaromatic hydrocar
bons (HAP)* by three species of locusts (Gomphocerus sibiricus, Gomphocerus
rufus and Euchorthippus pulvinatus). We wanted to evaluate their toxicity,
then to locate them in the organism. Two HAP, carcinogenic for mammals, we
re used. They are highly toxic for our locusts. Ingestion of 0.015 or 0.06
mg of 3 methylcholanthrene kills respectively 25% and 50% of them. Moreover
, benzo-a-pyrene seems to have a greater toxicity, and E. pulvinatus is the
most resistant species. Strongly fluorescent in UV light, 3 MC and BaP can
be easily detected in the organism after dissection, and with more detail
using frozen material. The microscope shows absorption activity of midgut;
most of the organs are consequently invaded by intact hydrocarbon or its va
rious derivatives. Muscles and reproductive organs show a bright fluorescen
ce, which reaches its maximum in the nervous system. Tubes of Malpighi seem
to be the principal route of elimination of these products. The remarkable
susceptibility of some organs is encouraging for the progress of our study
. (C) Elsevier, Paris.