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Article 6

Effects of two ecdysteroid analogs (RH-0345 and RH-2485) on the total growth of Eupolybothrus nudicornis (Myriapoda, Chilopoda)

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O. DAAS1, P. SCAPS2*, N. BOUZERNA1, M. DESCAMPS2
1Laboratoire de Biologie Animale Appliquée, Département de Biologie, Faculté des Sciences, Université Badji Mokhtar, 23000 Annaba, Algeria
2Laboratoire d’Ecologie Numérique et d’Ecotoxicologie, EA 3570, FR 1818, Université des Sciences et Technologies de Lille, 59655 Villeneuve d’Ascq, France
* Corresponding author: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

ABSTRACT. – We studied the effects of two ecdysteroid analogs (RH-0345 and RH-2485) on the growth and on the hemolymph and ovarian protein concentrations of the centipede Eupolybothrus nudicornis used as a model of predators of soil fauna. Sublethal doses of RH-0345 and RH-2485 significantly reduce total body and ovarian weights compared with those of controls. The decrease in ovarian weight is proportional to the decrease in total body weight because the gonadal somatic index remains constant and is the same among controls and intoxicated animals. RH-0345 and RH-2485 also reduce significantly the total protein concentrations in both the hemolymph fluid and ovarian tissue of females. Taken together, the observed decrease in total body and ovarian weight and total protein production is indicative of a decrease in total growth.

You are here: Volume 57 (2007) Issue 1 / 2 Article 6
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