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Potential endocrine disruption of ovary synthesis in the Christmas Island red crab Gecarcoidea natalis by the insecticide pyriproxyfen

Linton, Stuart, Barrow, Lauren, Davies, Claire and Harman, Laura 2009, Potential endocrine disruption of ovary synthesis in the Christmas Island red crab Gecarcoidea natalis by the insecticide pyriproxyfen, Comparative biochemistry and physiology. Part A : molecular & integrative physiology, vol. 154, no. 3, pp. 289-297, doi: 10.1016/j.cbpa.2009.02.024.

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Title Potential endocrine disruption of ovary synthesis in the Christmas Island red crab Gecarcoidea natalis by the insecticide pyriproxyfen
Formatted title Potential endocrine disruption of ovary synthesis in the Christmas Island red crab Gecarcoidea natalis by the insecticide pyriproxyfen
Author(s) Linton, StuartORCID iD for Linton, Stuart orcid.org/0000-0002-8292-7816
Barrow, Lauren
Davies, Claire
Harman, Laura
Journal name Comparative biochemistry and physiology. Part A : molecular & integrative physiology
Volume number 154
Issue number 3
Start page 289
End page 297
Total pages 9
Publisher Elsevier Science
Place of publication New York, N.Y.
Publication date 2009-11
ISSN 1095-6433
1531-4332
Keyword(s) Endocrinology
Environmental Toxicology
Land crabs
Methyl farnesoate
Ovary synthesis
Oogenesis
Pyriproxyfen
Summary The effect of the insecticide, pyriproxyfen on early ovary synthesis was examined in the Gecarcinid land crab, Gecarcoidea natalis. Crabs were fed a mixture of either leaf litter and bait containing 0.5% (wt/wt) pyriproxyfen (experimental groups), or a mixture of leaf litter and a control bait containing no pyriproxyfen (control groups), at simulated baiting doses of 2 kg ha− 1 and 4 kg ha− 1, during the period in which G. natalis synthesises its ovaries. A third group of crabs were fed ad libitum either the bait containing 0.5% Pypriproxyfen or the control bait. Pyriproxyfen affected early ovary development in G. natalis. The ovaries from crabs in the experimental groups at all baiting levels had a higher total nitrogen content and dry mass than the ovaries from crabs in the control groups. Pyriproxyfen affected the histology of the ovaries. Ovaries from animals in the experimental groups were more mature, containing more previtellogenic and early vitellogenic oocytes, of a larger diameter, than the ovaries from crabs in the control groups. Significant amounts of pyriproxyfen accumulated within the midgut gland and ovary, the hypothesised target tissues, while minor amounts of pyriproxyfen was accumulated in the muscle, a hypothesised non target tissue. Pyriproxyfen may have stimulated early ovary development and induced synthesis of yolk protein by mimicking methyl farnesoate and thus causing endocrine disruption. Given this, pyriproxyfen should not be used to control invasive insects in environments where gecarcinid and other land crab species are present.
Language eng
DOI 10.1016/j.cbpa.2009.02.024
Field of Research 060808 Invertebrate Biology
070505 Forestry Pests, Health and Diseases
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1 Refereed article in a scholarly journal
HERDC collection year 2009
Copyright notice ©2009, Elsevier Inc.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30018572

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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Created: Tue, 08 Sep 2009, 16:38:39 EST by Stuart Linton

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