Sensitivity to sodium fluoroacetate (1080) of native animals from north-western Australia

2002 ◽  
Vol 29 (1) ◽  
pp. 75 ◽  
Author(s):  
Gary R. Martin ◽  
Laurie E. Twigg
Keyword(s):  
Pest Control ◽  
Western Australia ◽  
Lethal Dose ◽  
Birds Of Prey ◽  
Secondary Poisoning ◽  
Control Programs ◽  
Barn Owls ◽  
Approximate Lethal Dose ◽  
North Western ◽  
Development Of Tolerance

The sensitivity to sodium monofluoroacetate (1080) of 9 species of native animals from north-western Australia was assessed using the increasing dose procedure to determine the Approximate Lethal Dose for each species. Granivorous birds from this region (e.g. ducks, corellas) were generally more sensitive to 1080 than their counterparts from southern Australia, and would be theoretically at risk from primary poisoning during 1080 grainbased baiting programs. However, the tolerance to 1080 of birds of prey from these areas is sufficient that these species face little risk of secondary poisoning during pest-control programs aimed at rodents or rabbits. The risk of primary poisoning to raptors from meat baits containing 6 mg 1080 per bait or less also appears to be low. The coexistence of brown falcons and barn owls with fluoroacetate-bearing vegetation over parts of their range has probably contributed to their development of tolerance to fluoroacetate.

Tissue residue levels in rabbits and rats poisoned with 1080 One-shot bait and the location of poisoned rabbit carcasses

2003 ◽  
Vol 30 (6) ◽  
pp. 621 ◽  
Author(s):  
Laurie E. Twigg ◽  
Tim J. Lowe ◽  
Winifred E. Kirkpatrick ◽  
Gary R. Martin
Keyword(s):  
Pest Control ◽  
Potential Risk ◽  
Secondary Poisoning ◽  
Tissue Residue ◽  
Control Programs ◽  
Highly Sensitive ◽  
Residue Levels

The level of fluoroacetate (1080) found in the carcasses of rats and rabbits poisoned with 1080 ranged from 1.9 to 14.4 μg g–1 (mean 5.3 μg g–1, n = 11) in rats and <0.02 to 0.78 μg g–1 (mean 0.353 μg g–1, n = 10) in rabbits. The concentration of fluoroacetate in the blood and liver of both species was generally higher than in the carcasses, and ranged from <0.02 to 33.6 μg g–1. Fifteen of 22 collared rabbits, and 3 freshly killed, uncollared rabbits were recovered during a routine baiting exercise with 1080 One-shot oats. Excluding the 4 collared rabbits taken by predators, only 14% of all carcasses (n = 14) were found in the open, with the remaining 86% of carcasses being well concealed in warrens or under thick scrub. The carcasses of both rabbits and rats showed considerable decay within 6 days of poisoning. Except for eutherian carnivores, which are highly sensitive to 1080, there is little potential risk of secondary poisoning of native wildlife as a result of the correct use of 1080 baits in pest-control programs.

An Assessment of the Potential Target Specificity of 1080 Predator Baiting in Western-Australia

1989 ◽  
Vol 16 (6) ◽  
pp. 625 ◽  
Author(s):  
MC Calver ◽  
DR King ◽  
JS Bradley ◽  
JL Gardner ◽  
G Martin
Keyword(s):  
Western Australia ◽  
Mus Musculus ◽  
Rattus Norvegicus ◽  
National Park ◽  
Lethal Dose ◽  
Potential Hazard ◽  
Laboratory Mice ◽  
Laboratory Rats ◽  
Sminthopsis Crassicaudata ◽  
Approximate Lethal Dose

The potential hazard of 1080 baiting for predators to 14 species of non-target mammals in the pastoral areas of Western Australia and a further six from Western Australia's Fitzgerald River National Park, was assessed by comparing projected doses of 1080 (based on consumption of non-toxic bait by captive animals in the absence of alternative food) with the approximate lethal dose of 1080 for each species. These figures suggested that individuals from 12 species were potentially at risk from crackle baits, while only individuals from Dasyurus hallucatus, Ningaui spp., Sminthopsis crassicaudata, Planigale maculata, one population of Leggadina forresti and one population of Sminthopsis ooldea were potentially endangered by meat baits. Tests using the native mammals Zyzomys argurus and Pseudomys hermannsbergensis and laboratory mice (Mus musculus) and laboratory rats (Rattus norvegicus) showed that individuals of all species reduced their consumption of toxic bait relative to non-toxic bait, although this did not prevent three of five rats and one of three P. hermannsbergensis from being killed.

scholarly journals Large‐scale eDNA metabarcoding survey reveals marine biogeographic break and transitions over tropical north‐western Australia

2021 ◽  
Author(s):  
Katrina West ◽  
Michael J. Travers ◽  
Michael Stat ◽  
Euan S. Harvey ◽  
Zoe T. Richards ◽  
...  
Keyword(s):  
Western Australia ◽  
Large Scale ◽  
North Western

Bysmatrum teres sp. nov., a new sand-dwelling dinoflagellate from north-western Australia

Phycologia ◽  
2006 ◽  
Vol 45 (2) ◽  
pp. 161-167 ◽  
Author(s):  
Shauna Murray ◽  
Mona Hoppenrath ◽  
Jacob Larsen ◽  
David J. Patterson
Keyword(s):  
Western Australia ◽  
North Western

Feral pigs in north-western Australia: population recovery after 1080 baiting and further control

2006 ◽  
Vol 33 (5) ◽  
pp. 417 ◽  
Author(s):  
Laurie E. Twigg ◽  
Tim Lowe ◽  
Michael Everett ◽  
Gary Martin
Keyword(s):  
Western Australia ◽  
Population Recovery ◽  
Feral Pigs ◽  
Muddy Water ◽  
Good Body Condition ◽  
Bait Station ◽  
Before And After ◽  
Bait Stations ◽  
North Western ◽  
Fitzroy River

The recovery rate of a population of feral pigs (Sus scrofa) in the west Kimberley in north-western Australia was determined 12 months after a 1080 (sodium fluoroacetate)-baiting program. An estimated 56 pigs were present in the 15 000-ha study area in August 2005 compared with the prebaiting levels of 250–275 pigs in 2004 (11 pigs were known to be alive on site after the 2004 baiting). This represents a population recovery of 20–23% of the 2004 prebaiting levels. Although most pigs were in good body condition, environmental conditions were quite different between the two years. In 2005, some waterholes were dry or comprised mainly muddy water with little associated shelter for feral pigs. Consequently, and in contrast to 2004, no pigs were seen, and no bait take could be attributed to feral pigs, at the four resurveyed waterholes. Most pig sightings, and activity, were close to the Fitzroy River. Fermented wheat, with blood and bone, was used to determine areas of pig activity, and also used as prefeed before 1080-baiting commenced in 2005. Using the same bait stations as for 2004, plus additional stations established in new areas of pig activity, 1080-treated wheat and malted barley again proved highly effective in reducing pig numbers. The daily sighting index before and after 1080-baiting indicated that pig numbers had been reduced by ~90% within four days. Estimated pre- and postpoisoning density, with and without an edge effect, was 0.12–1.7 pigs km–2 and 0.05–0.67 pigs km–2. Pig tracks decreased to zero on the six track plots within two days of baiting, but the number of macropod tracks remained constant over the four-day baiting period. Thirty-eight poisoned pigs were found after 1080-baiting, and these were generally in clustered groups within 200 m of an active bait station. Poisoned juvenile pigs were again found closer to the active bait stations than were adult or subadult pigs (P < 0.05).

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