Understanding why farmers change their farming practices : the role of orienting principles in technology transfer

This report presents results from a qualitative study of sheep, beef and dairy farmers in the Temuka, Geraldine area of the South Island, New Zealand. Farmers' accounts of their farming practices, and how they decide to adopt, or not adopt, innovations are analysed to highlight the key orienting principles that guide their decision making. Farmers in each type of production have different orientations to innovation, in large part reflecting the nature of the industry in which they are located. Sheep and beef farmers emphasise profitability and the need to control risk and to farm safely. Dairy farmers emphasise increasing production, increasing efficiency and control by monitoring production. The results are important for alerting researchers and educationalists to the farmers' point of view in the development of effective extension.Funding for this research was received from the Foundation for Research, Science and Technology. The Lotteries Board supported the research by providing technical equipment. The former New Zealand Institute for Social Research and Development initiated this project and it was continued by the AERU in November, 1994

An updated review of the toxicology and ecotoxicology of sodium fluoroacetate (1080) in relation to its use as a pest control tool in New Zealand

Sodium fluoroacetate (1080) is a vertebrate pesticide, originally developed in the 1940s and principally used for the control of unwanted introduced animals in New Zealand and Australia. Fluoroacetate is also a toxic component of poisonous plants found in Australia, Africa, South America, and India. In relation to its use as a pesticide, recent research has focused on further elucidation of its potential sub-lethal effects, on animal welfare issues, on understanding and reducing its risk to non-target species, on its ecotoxicology, and fate in the environment following use in baits. 1080 acts by interfering with cellular energy production through inhibition of the tricarboxylic acid cycle and lethal doses can kill animal pests within 6–48 h of eating baits. Exposure to sub-lethal doses has been shown to have harmful effects on the heart and testes in animal studies, and strict safety precautions are enforced to protect contractors and workers in the pest control industry. Considerable care must be taken when using 1080 for the control of animal pests. Primary poisoning of non-target birds and secondary poisoning of dogs must be minimised to ensure that benefits in terms of conservation outcomes and pest and disease control significantly outweigh the risks associated with its use. Despite over 60 years of research and practical experience, the use of 1080 is still embroiled in controversy, while research efforts continue to improve its target specificity when it is used as a conservation tool or for Tb vector control

Report on ARGOS' second qualitative interview

The primary objective of the ARGOS project is the transdisciplinary examination of the condition of sustainable agriculture in New Zealand (including environmental, economic and social aspects). In pursuit of this objective to date, considerable effort has been dedicated to assessing the comparative sustainability or resilience of designated management panels in three branches of the New Zealand agricultural sector (dairy, kiwifruit and sheep/beef). For this purpose, farms of comparable size and similar location were assigned panel membership as determined by an individual farmer’s compliance (or lack thereof) with existing market audit schemes which – to varying degrees – regulate farm management practice. By sector, the panels are comprised of conventional and organic methods of dairy farming, integrated pest management (Hayward, green, and Hort 16a, gold) and organic (Hayward) methods of kiwifruit production, and conventional, integrated and organic methods of sheep and beef farming. Due to the distinct nature of practices associated with each panel, differences in the assessed ecological, economic and social features of the participating farms and farm households offer the potential to distinguish the relative sustainability of systems based on these practices

Disordered eating among mid-age women: is quality of life impacted over time?

Objective This longitudinal study of midlife women has three aims: examine quality of life (QoL) among women with and without indicators of disordered eating (DE); compare the obtained QoL effect to a younger cohort in the same longitudinal study and investigate potential moderating effects of depression and social support on the relationship between DE and QoL. Method We used self-report data from six waves of the Australian Longitudinal Study on Women s Health over 14 years. A total of 12,338 women participating in the mid-age cohort (ageing from 45-50 to 59-64) provided self-report indications of DE at Surveys 1 and 2, and QoL (SF-36 component scales - mental [MCS] and physical [PCS]) at Surveys 2-6. Results DE was reported by 10.25% of the women who also reported significantly poorer mental and physical QoL than those without DE; this effect was sustained over 12 years. Effect size differences for the midlife and younger women, between those with and without DE, showed a larger impact on physical QoL over time for the mid-age women. Midlife women with high levels of depressive symptoms (with and without DE) had the lowest initial mental QoL scores. Midlife women with high depression and DE had the greatest increase in mental QoL over time, but their mean score was still considerably lower than all other groups. Conclusions This study underscores the significant effect of midlife DE on QoL, particularly when comorbid with depression, suggesting specific support options are needed for mid-age women.A Kate Fairweather-Schmidt, Christina Lee, Tracey D Wad

Australia's coastal fisheries and farmed seafood: An ecological basis for determining sustainability

In response to consumer concerns about the sustainability of Australian-sourced seafood we derive a set of criteria within an explicit decision-process that can be used to determine whether locally farmed and wild-caught Australian seafood products meet standards of ecological sustainability and Ecologically Sustainable Development. These criteria substantially address the ecological deficiencies we identified in other systems commonly used for assessing seafood sustainability. The criteria address the issues that are relevant to local seafood production, and are populated with indicators (metrics) and benchmarks relevant to the Australian context. The indicators establish performance thresholds drawn from public domain data about the products, including observed empirical data and proxies, and include default decisions to be applied in the absence of adequate information. This decision structure is set within a peer-reviewed expert jury decision-making process. The criteria, decision process and decision outcomes from assessment of a number of pilot products were tested in a real seafood market (Melbourne), where we found a high level of producer, reseller and consumer acceptance of the judgements and ratings. The use of ecologically-derived standards results in several outcomes that differ from those of other seafood assessment systems, especially those assessments more focused on production standards, such as government, industry and NGO-supported programs, popularly used in Australia and worldwide. We conclude that despite high levels of uncertainty surrounding many of the population parameters, ecological patterns and processes, empirical cost-effective proxies can be used to reasonably estimate a form of sustainability that matches consumer interests/expectations for production of fresh local seafood. Despite the plethora of industry and government programs, there remains a significant but presently unmet consumer demand for ecologically-based, technically robust, independently derived, and readily available information about the local sustainability attributes of Australian wild-caught and farmed fresh seafood

Simulation of deterministic energy-balance particle agglomeration in turbulent liquid-solid flows

An efficient technique to simulate turbulent particle-laden flow at high mass loadings within the four-way coupled simulation regime is presented. The technique implements large-eddy simulation, discrete particle simulation, a deterministic treatment of inter-particle collisions, and an energy-balanced particle agglomeration model. The algorithm to detect inter-particle collisions is such that the computational costs scale linearly with the number of particles present in the computational domain. On detection of a collision, particle agglomeration is tested based on the pre-collision kinetic energy, restitution coefficient, and van der Waals’ interactions. The performance of the technique developed is tested by performing parametric studies on the influence of the restitution coefficient (en = 0.2, 0.4, 0.6, and 0.8), particle size (dp = 60, 120, 200, and 316 μm), Reynolds number (Reτ = 150, 300, and 590), and particle concentration (αp = 5.0 × 10−4, 1.0 × 10−3, and 5.0 × 10−3) on particle-particle interaction events (collision and agglomeration). The results demonstrate that the collision frequency shows a linear dependency on the restitution coefficient, while the agglomeration rate shows an inverse dependence. Collisions among smaller particles are more frequent and efficient in forming agglomerates than those of coarser particles. The particle-particle interaction events show a strong dependency on the shear Reynolds number Reτ, while increasing the particle concentration effectively enhances particle collision and agglomeration whilst having only a minor influence on the agglomeration rate. Overall, the sensitivity of the particle-particle interaction events to the selected simulation parameters is found to influence the population and distribution of the primary particles and agglomerates formed

Diphacinone and coumatetralyl persistence in deer and implications for wildlife management

Eason, C.T., Murphy, E., Ross, J.G., Hix, S., Arthur, D., MacMorran, D., Broome, K., Fairweather, A