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|Title: ||Bait consumption and residual concentrations of diphacinone in the Wellington tree weta (Hemideina crassidens) (Orthoptera: Anostostomatidae)|
|Author: ||Fisher, Penny|
Spurr, Eric B.
Ogilvie, Shaun C.
Eason, Charles T.
|Date: ||2007 |
|Publisher: ||New Zealand Ecological Society.|
|Citation: ||Fisher, P., Spurr, E. B., Ogilvie, S. C., & Eason, C. T. (2007). Bait consumption and residual concentrations of diphacinone in the Wellington tree weta (Hemideina crassidens) (Orthoptera : Anostostomatidae). New Zealand Journal of Ecology, 31(1), 104-110.|
|Item Type: ||Journal Article|
|Abstract: ||To investigate the potential for mortality or sublethal effects in the tree weta (Hemideina crassidens)
as the result of exposure to baits used for rodent control, and the potential secondary hazard to non-target species,
captive weta were offered Ditrac® wax block bait containing the anticoagulant diphacinone. Bait consumption
was recorded daily for the first week and then weekly. Weta were sampled in groups of four following 1, 4, 8,
16, 31, and 64 days of exposure to bait and analysed to determine the concentration of diphacinone residues in
their bodies. Any changes in feeding behaviour, survival, and bodyweight were recorded. Weta found Ditrac wax
block baits palatable even in the presence of natural plant food, showing steady consumption of bait over time.
No mortality or weight loss was attributable to the intake of Ditrac bait. All weta that ate bait had detectable
diphacinone in their bodies, but did not accumulate diphacinone, i.e. whole-body concentrations did not increase
with the amount of diphacinone bait eaten over time. Field use of diphacinone bait is likely to present a low risk
of mortality to weta, but the risk posed by secondary diphacinone exposure to non-target species that eat weta requires further investigation.|
|Persistent URL (URI): ||http://hdl.handle.net/10182/5014|
|Related: ||Originally published online by the New Zealand Ecological Society at: http://www.nzes.org.nz/nzje/|
|Related URI: ||http://www.nzes.org.nz/nzje/contents.php?volume_issue=j31_1|
|Rights: ||Copyright © New Zealand Ecological Society|
|Appears in Collections:||Department of Ecology|
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