Search the SPREP Catalogue

Advanced Search
Refine Search Results

Tags / Keywords

Series

Available Online

Tags / Keywords

Series

Available Online

150 result(s) found.

Sort by

You searched for

  • Tags / Keywords eradication
    X
clear
Proposed national system for early detection, reporting, assessment and eradication of new invasive plants in the United States: a concept paper / Randy G. Westbrooks
BRB

Westbrooks, R.G.

1998
Response of lizard assemblages in the Mercury Islands, New Zealand, to removal of an introduced rodent: the kiroe (Rattus exulans)
BRB

Towns, D.R.

1991
The Langara Island Seabird Habitat Recovery Project: eradiction of Norway Rats, 1993-1997
BRB

Kaiser, G.W...[et al.]

1997
Using Brodifacoum to eradicate kiore (Rattus exulans) from Burgess Island and the Knights group of the Mokohinau Islands / by Ian McFadden and Terry Greene. - Wellington, N.Z. : Dept. of Conservation, 1994.
BRB

McFadden, Ian

1994
Eradication of kiore double island, mercury group in Northern New Zealand / by Ian McFadden
BRB

McFadden, Ian

1992
Kiore were eradicated on Double Island using two different methods. The larger islet was treated with one manual application of STORM 4 g wax block rat baits containing 0.005% by weight Flocoumafen, in October 1989. The smaller islet received one application of toxic kibbled maize (0.005% bromodialone by weight) after 4 nights prefeeding in November 1989. Kibbled maize was dispensed in silos. No sign of kiore has since been found during four visits to both islands. The cost per hectare for both methods were quite comparable. The nett cost for eradication on the larger islet (19 ha) was $310/ha, the smaller islet cost $432/ha. Both methods are considerably cheaper than the technique used to eradicate Norway rats (R. norvegicus) from Hawea Island. For future rodent eradication campaigns it is suggested that aerial applications of poisons may be made on all islands greater than 50 ha, and that size should be no barrier to rodent eradication. However, substantial non-target have been recorded when 1080 baits were broadcast aerially to control possum. Non-target kills of a similar magnitude may be experienced on larger and more sensitive islands.
Environmental effects of rodent Talon baiting Part I : Monitoring for toxic residues : Part II Impacts on invertebrate populations
BRB
Available Online

Morgan, D. R.

,

Spurr, E. B.

,

Wright, G. R.

1998
Although Talon® baits containing brodifacoum have been used successfully in eradicating rats from some of New Zealand’s offshore islands, little is known about any environmental effects of this toxin. We sampled invertebrates, blackbirds, soil, and water at intervals of 2 days to 9 months to determine whether brodifacoum residues were present after aerial distribution of Talon® 20P cereal pellets on Red Mercury Island and after bait-station use of Talon® 50WB wax-coated cereal blocks on Coppermine Island. No brodifacoum residues were found in soil, water, or most (99%) invertebrate samples. Low to moderate residues were found in one sample of slugs collected 2 days after aerial sowing. Tissues from all birds (n=4) and rats (n=3) found dead and livers from all six birds collected alive 8 months after aerial baiting also contained low to moderate residues. These preliminary results suggest that few invertebrates are likely to be contaminated as a result of Talon® baiting. Tentatively, we suggest that although some invertebrates may eat Talon® baits, it appears that the brodifacoum is either metabolised and/or excreted within a few days. The dead blackbirds found, therefore, were more likely to have been killed by primary than by secondary poisoning. Further monitoring for brodifacoum residues after Talon® operations should be undertaken to confirm that contamination of invertebrates, soil, and water is unlikely. Some bird species may be at risk from Talon® baiting. Likely effects on population levels of such species should be considered to help assess the risk and benefits of Talon® use in rodent eradication.
Monitoring possum numbers following 1080 poison control at Mapara reserse
BRB

Stephens, Theo

1992
1080 poisoned baits (Wanganui No. 7) were aerially spread throughout the three blocks of Mapara reserve in September 1990 and again in October 1991 to control possums. Changes in possum abundance were monitored by trapping, using a modified version of Seber's "removal method". A trapping method was chosen in preference to spotlight counts, bait take and pellet counts because a suitable control area, critical to these methods, was not available; traps were already in place on permanent sets; and trapping contributes to the control objective. The removal index was considered more suitable for monitoring than the simpler catch per unit effort index (number of possums caught per 3 trap-nights) because the latter is affected by variation in possum catchability, as well as possum abundance. The removal method depends on obtaining declining catches on successive nights. There is a significant risk that the method will not give a meaningful result if trapping intensity is inadequate or if nightly variation in catchability is excessive. The catch per unit effort index is still available if an abundance index based on the removal method is unobtainable. The 1990 poison operation reduced possum numbers to 21% of pre-poison abundance (95% Confidence Limits (CL) were 13.8% and 28.2%). During the following year, possum numbers built up to 39.5% (95% CL 28.7% and 50.3%) of pre-poison abundance and 1991 poison operation caused a non-significant reduction to 32.2% (95% CL 21.8% and 42.6%). Thus the September 1991 operation probably did not reduce possum densities to the level attained in October 1990. The reason for the poor kill following the 1991 poison drop is unknown, although several possibilities are identified.
UK Rodent Eradication Best Practice Toolkit
BRB
Available Online
2018
The spread of invasive non-native species presents one of the greatest threats to biodiversity globally: invasive species are the primary driver of biodiversity loss on islands and the second largest everywhere else (CBD ; Millennium Ecosystem Assessment, 2005). Many of the UK’s island ecosystems have been damaged by the arrival and establishment of invasive non-native species. Introduced predators have caused particularly catastrophic damage to many species of waders and seabirds, undoubtedly causing numerous extirpations as well as contributing to ongoing declines(Stanbury et al. 2017). Removing invasive vertebrates from islands is an important conservation tool to protect and restore island ecosystems and to prevent further declines and losses of native species. The UK Rodent Eradication Best Practice Toolkit is intended as an advisory resource, providing a systematic approach for planning and implementing rodent eradications and biosecurity in the UK. It provides technical advice on specific methods to be used in the UK, as well as an eradication project management framework which is applicable to projects everywhere. This Best Practice Toolkit has been compiled, and contributed to, by several UK governmental and non-governmental organisations involved in island restoration, these being: Royal Society for the Protection of Birds (RSPB), Animal and Plant Health Agency (APHA), Department for Environment, Food and Rural Affairs (Defra), GB Non-Native Species Secretariat (GB NNSS), Joint Nature Conservation Committee (JNCC), National Trust, National Trust for Scotland, Natural England, Natural Resources Wales (NRW), Scottish Natural Heritage (SNH), Scottish Wildlife Trust (SWT) and the Isles of Scilly Wildlife Trust. The Toolkit has also received input from Wildlife Management International Ltd (WMIL), and draws heavily from the documentation produced by WMIL for various rat eradication projects undertaken in the UK. The use of the UK Rodent Eradication Best Practice Toolkit aims to give UK organisations and practitioners the ability to embark on invasive rodent management projects with greater confidence of achieving the desired island restoration goals. For more information or to provide feedback on this resource, please contact Sophie Thomas [email protected] .
Killing rats could save coral reefs
BRB
Available Online

Gill, Victoria

Short website news article about rat eradication on Chagos Islands in the Indian Ocean and how bird populations increase without rat predation increasing nutrients from bird guano into the coral reefs; cites letter article in Springer Nature - Seabirds enhance coral reef productivity and functioning inthe absence of invasive rats, Nichaolas A.J. Graham, Shaun K. Wilson, Peter Carr, Andrew S. Hoey, Simon Jennings, M. Aaron MacNeil https://doi.org/10.1038/s41586-018-0202-3
Beyond Kapiti - A decade of invasive rodent eradications from New Zealand islands
BRB
Available Online

Broome, Keith

2011
New Zealand, an archipelago of more than 2000 islands, has a terrestrial fauna especially depauperate in native land mammals. Kiore (Rattus exulans) was the first of four rodent species introduced by people. A project to eradicate invasive rats from Kapiti Island in 1996, represented a turning point in the technology, complexity and scale at which managers of natural heritage on New Zealand islands could operate. This paper includes case studies of some significant projects targeting rodents, sometimes with other introduced mammals, undertaken in the 12 years following Kapiti. Details of the methods, costs, results and outcomes are provided for Kapiti, Whenua Hou, Tuhua, Campbell, Raoul, Hauturu, Taukihepa, and Pomona islands, collectively representing a total of over 23,000 ha of habitat cleared of introduced mammals. Research and trials undertaken in the Kapiti project provided the basis for future environmental risk assessments, allowing other projects to focus on knowledge gaps. New trends in invasive species eradication in New Zealand include more challenging multi-species eradication projects, some of which are undertaken by self- funded community groups. To summarise the lessons of the New Zealand experience: a programmatic approach is recommended which will fit each eradication within a context or framework of goals for those islands; address biosecurity issues at the outset; build capability to attempt the most challenging and rewarding projects; facilitate investment in monitoring and manage expectations of stakeholders to ensure their ongoing support. Success breeds success but is never guaranteed.

www.sprep.org © 2021 - 2024. All rights reserved

Login