The paper presents an overview of a nationwide research and implementation programme in New Zeala... more The paper presents an overview of a nationwide research and implementation programme in New Zealand entitled 'Low impact urban design and development: making it mainstream' and reports on two aspects of the research underway. The purpose of the programme is to facilitate the uptake and implementation of low impact urban design and development (LIUDD) practices. The paper briefly outlines the
Summary: The field use of brodifacoum baits (Talon® and Pestoff®) to control brushtail possums (T... more Summary: The field use of brodifacoum baits (Talon® and Pestoff®) to control brushtail possums (Trichosurus vulpecula) has increased in recent years. This has raised concerns of secondary and tertiary poisoning, resulting from the transfer of this toxicant through the food chain. In New Zealand, feral pigs (Sus scrofa) are known to scavenge possum carcasses and may also gain access to
... METHODS Non-target acute toxicity Non-target species were exposed as follows: groups of sixma... more ... METHODS Non-target acute toxicity Non-target species were exposed as follows: groups of sixmallard ducks (Anas platyrhyndos), four domestic chickens (Gallus gallus), and four canaries (Serinus canarius) were dosed orally with cholecalciferol concentrate at 2000 mg/kg in ...
Innovative Algorithms and Techniques in Automation, Industrial Electronics and Telecommunications, 2007
An analog computer was designed and tested to solve any second order constant-coefficients and li... more An analog computer was designed and tested to solve any second order constant-coefficients and linear differential equation. The analog computer was built using operational amplifiers, resistors and capacitors. Using the Multisim simulator, various input types were tested across the input terminals of the analog computer and the results were recorded.
Rodents remain one of the most widespread and damaging invasive alien species on islands globally... more Rodents remain one of the most widespread and damaging invasive alien species on islands globally. The current toolbox for insular rodent eradications is reliant on the application of sufficient anticoagulant toxicant into every potential rodent territory across an island. Despite significant advances in the use of these toxicants over recent decades, numerous situations remain where eradication is challenging or not yet feasible. These include islands with significant human populations, unreceptive stakeholder communities, co-occurrence of livestock and domestic animals, or vulnerability of native species. Developments in diverse branches of science, particularly the medical, pharmaceutical, invertebrate pest control, social science, technology and defense fields offer potential insights into the next generation of tools to eradicate rodents from islands. Horizon scanning is a structured process whereby current problems are assessed against potential future solutions. We undertook such an exercise to identify the most promising technologies, techniques and approaches that might be applied to rodent eradications from islands. We highlight a Rattus-specific toxicant, RNA interference as species-specific toxicants, rodenticide research, crab deterrent in baits, prophylactic treatment for protection of non-target species, transgenic rodents, virus vectored immunocontraception, drones, self-resetting traps and toxicant applicators, detection probability models and improved stakeholder community engagement methods. We present a brief description of each method, and discuss its application to rodent eradication on islands, knowledge gaps, challenges, whether it is incremental or transformative in nature and provide a potential timeline for availability. We outline how a combination of new tools may render previously intractable rodent eradication problems feasible.
The paper presents an overview of a nationwide research and implementation programme in New Zeala... more The paper presents an overview of a nationwide research and implementation programme in New Zealand entitled 'Low impact urban design and development: making it mainstream' and reports on two aspects of the research underway. The purpose of the programme is to facilitate the uptake and implementation of low impact urban design and development (LIUDD) practices. The paper briefly outlines the
Summary: The field use of brodifacoum baits (Talon® and Pestoff®) to control brushtail possums (T... more Summary: The field use of brodifacoum baits (Talon® and Pestoff®) to control brushtail possums (Trichosurus vulpecula) has increased in recent years. This has raised concerns of secondary and tertiary poisoning, resulting from the transfer of this toxicant through the food chain. In New Zealand, feral pigs (Sus scrofa) are known to scavenge possum carcasses and may also gain access to
... METHODS Non-target acute toxicity Non-target species were exposed as follows: groups of sixma... more ... METHODS Non-target acute toxicity Non-target species were exposed as follows: groups of sixmallard ducks (Anas platyrhyndos), four domestic chickens (Gallus gallus), and four canaries (Serinus canarius) were dosed orally with cholecalciferol concentrate at 2000 mg/kg in ...
Innovative Algorithms and Techniques in Automation, Industrial Electronics and Telecommunications, 2007
An analog computer was designed and tested to solve any second order constant-coefficients and li... more An analog computer was designed and tested to solve any second order constant-coefficients and linear differential equation. The analog computer was built using operational amplifiers, resistors and capacitors. Using the Multisim simulator, various input types were tested across the input terminals of the analog computer and the results were recorded.
Rodents remain one of the most widespread and damaging invasive alien species on islands globally... more Rodents remain one of the most widespread and damaging invasive alien species on islands globally. The current toolbox for insular rodent eradications is reliant on the application of sufficient anticoagulant toxicant into every potential rodent territory across an island. Despite significant advances in the use of these toxicants over recent decades, numerous situations remain where eradication is challenging or not yet feasible. These include islands with significant human populations, unreceptive stakeholder communities, co-occurrence of livestock and domestic animals, or vulnerability of native species. Developments in diverse branches of science, particularly the medical, pharmaceutical, invertebrate pest control, social science, technology and defense fields offer potential insights into the next generation of tools to eradicate rodents from islands. Horizon scanning is a structured process whereby current problems are assessed against potential future solutions. We undertook such an exercise to identify the most promising technologies, techniques and approaches that might be applied to rodent eradications from islands. We highlight a Rattus-specific toxicant, RNA interference as species-specific toxicants, rodenticide research, crab deterrent in baits, prophylactic treatment for protection of non-target species, transgenic rodents, virus vectored immunocontraception, drones, self-resetting traps and toxicant applicators, detection probability models and improved stakeholder community engagement methods. We present a brief description of each method, and discuss its application to rodent eradication on islands, knowledge gaps, challenges, whether it is incremental or transformative in nature and provide a potential timeline for availability. We outline how a combination of new tools may render previously intractable rodent eradication problems feasible.
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Papers by Charles Eason