Implementation Of Dynamic Reference Points And Harvest Strategies To Account For Environmentally-driven Changes In Productivity In Australian Fisheries
Funder
Fisheries Research and Development Corporation
Funding Amount
$552,027.00
Summary
Recently, the risks resulting from not accounting for variability in productivity have become translated into potential risks associated with environmentally driven trends in recruitment, particularly the risk created by ongoing declines in recruitment (and/or growth) driven by climate-change induced trends in water temperature, weather and current patterns.
A number of southeast Australia fish stocks have failed to 'recover' following substantial reductions in catch and effort, and a n ....Recently, the risks resulting from not accounting for variability in productivity have become translated into potential risks associated with environmentally driven trends in recruitment, particularly the risk created by ongoing declines in recruitment (and/or growth) driven by climate-change induced trends in water temperature, weather and current patterns.
A number of southeast Australia fish stocks have failed to 'recover' following substantial reductions in catch and effort, and a number of research projects have concluded that some of these have undergone an environmentally-driven reduction in productivity. A productivity shift has already been demonstrated for Eastern Jackass Morwong, with the stock-recruit relationship and reference points being adjusted to reflect this change. Ecosystem and climate-change modelling have predicted increasing likelihood of similar changes in productivity for a number of Australian fish stocks.
Current harvest strategies assume either equilibrium or some average B0, and associated target (B48) and limit (B20) reference points. Use of equilibrium B0-based reference points and harvest strategies do not correctly reflect the natural dynamics of stocks where productivity changes. This can lead to sub-optimal management, either over-utilising a reduced productivity stock or under-utilising an increased productivity stock. In contrast, reference points based on some proportion of naturally variable unfished biomass (Bunfished or dynamic B0) will fluctuate to follow environmentally-driven productivity changes. Dynamic reference points have been evaluated and adopted for a number of international fisheries.
The need to adapt stock assessment methods and harvest strategies to explicitly and justifiably account for shifts in productivity has been recognised by the AFMA Resource Assessment Group for the Southern and Eastern Scalefish and Shark Fishery (SESSF), not least as a result of clearly evident declines in biomass (Jackass Morwong, Redfish) or recruitment (Silver Warehou) that cannot be attributed to fishing under current productivity assumptions.
Objectives: 1. To review relevant international research and management approaches to account for environmentally-driven productivity change in stock assessments, reference points and harvest strategies for selected Australian fish stocks. 2. To identify and describe circumstances and fish stocks for which dynamic reference points should or should not be used in stock assessments and harvest strategies, and develop appropriate methodology for conducting assessments using dynamic reference points. 3. To identify selected candidate fish stocks showing likely environmentally-driven productivity change, conduct comparative assessments for these stocks using equilibrium and dynamic reference points, and prepare a candidate harvest strategy that includes dynamic reference points for testing in the FRDC Multi-Species Harvest Strategy project. 4. To make recommendations on future implementation of dynamic reference points and harvest strategies for Australian fish stocks. 5. To develop and improve methods for detecting and quantifying changes in productivity (growth and recruitment) in stock assessments, to relate these to environmental mechanisms causing productivity changes, and to evaluate data needs, including environmental indices, required to usefully detect and evaluate productivity change under various circumstances. 6. To consider and evaluate options for effective harvest control rules, incorporating dynamic reference points, that might appropriately respond to changes in fish stock productivity, including environmentally driven trends in productivity. 7. To identify environmental circumstances and fish stock characteristics under which it would be appropriate and advisable to move to using assessments and management approaches incorporating dynamic productivity and reference points, vs. stocks for which dynamic approaches offer no benefit compared to existing equilibrium approaches. 8. To make recommendations on future stock assessment approaches, data requirements, harvest control rules and management approaches incorporating environmental indicators, dynamic productivity and dynamic reference points for Australian fish stocks. Read moreRead less
Systematic Expansion Of The Clinical Evidence Base In Opioid Prescribing For Refractory Dyspnoea At The End Of Life
Funder
National Health and Medical Research Council
Funding Amount
$414,535.00
Summary
Morphine can relieve breathlessness in the palliative setting. But many important questions remain. What is the best dose, should the dose change over time, do different medications provide the same relief, and how common is dyspnoea in the general population? This three part project will extend our knowledge to answer these questions. Population data will provide critical background to plan best care for future palliative patients distressed by breathlessness.
Using N-of-1 Trials To Determine Effectiveness Of Paracetamol In Advanced Cancer Patients On Opioids
Funder
National Health and Medical Research Council
Funding Amount
$49,996.00
Summary
In advanced cancer, the prevalence of pain is very high (70-90%). Chronic pain is the most feared symptom and is not controlled in a large proportion of cancer patients. The impact on function (physical, mental, social and spiritual) and quality of life (QOL) is very significant. The role of paracetamol in the management of pain in patients with advanced cancer on opioids needs to be defined. Managing pain with treatment supported by the best possible evidence for individual patients and produci ....In advanced cancer, the prevalence of pain is very high (70-90%). Chronic pain is the most feared symptom and is not controlled in a large proportion of cancer patients. The impact on function (physical, mental, social and spiritual) and quality of life (QOL) is very significant. The role of paracetamol in the management of pain in patients with advanced cancer on opioids needs to be defined. Managing pain with treatment supported by the best possible evidence for individual patients and producing any improvement in pain will improve patients’ functional status, and will greatly improve QOL for patients and carers. N-of-1 trials are randomized, double-blind cross-over comparisons of active drug with placebo or another drug. The patient is their own control. N-of-1 trials provide objective means of testing effectiveness of medicines in individuals, providing evidence stronger than randomised controlled trial evidence for the efficacy of that drug in that individual. We will pilot N-of-1 trials of paracetamol for pain in 10 patients. If feasible, this will be a new method of obtaining strong evidence in a difficult to research population: palliative care patients.Read moreRead less
Kidney transplantation is a life-saving treatment for most people with end-stage kidney disease. For some people, however, it causes more harm than good. We will clarify which individuals will benefit from transplantation by personalising information on predicting potential outcomes after transplantation. We will use this to develop a decision tool to help doctors and patients make these challenging and irreversible decisions. This will maximise the benefits from this precious resource.
Cardiovascular Disease; Priorities And Outcomes For People With Chronic And End Stage Kidney Disease
Funder
National Health and Medical Research Council
Funding Amount
$81,976.00
Summary
This thesis will investigate the patterns, causes and effects of heart disease in chronic kidney disease patients; how heart disease impacts on hospital admission patterns and mortality over time. We will explore the relationship between cognition, cardiovascular and kidney disease; the impact on patient outcomes and quality of life. Finally, we will explore how current research funding reflects disease burden, research output and the stated priorities of patients with chronic kidney disease.
Discussing Prognosis & End-of-life Issues In Palliative Care: Current Practice & Dvlpmnt Of Evidence Based Trng Program
Funder
National Health and Medical Research Council
Funding Amount
$149,955.00
Summary
Discussing prognosis and end-of-life issues is of key importance to palliative care patients and their families. We will a) prepare evidence based communication guidelines on these topics, b) analyse audio-taped consultations to see how these issues are currently discussed and c) develop and pilot a communication training module for palliative care clinicians. This could improve clinical practice, enhance patients' and families' psychological well-being and help patients to make appropriate deci ....Discussing prognosis and end-of-life issues is of key importance to palliative care patients and their families. We will a) prepare evidence based communication guidelines on these topics, b) analyse audio-taped consultations to see how these issues are currently discussed and c) develop and pilot a communication training module for palliative care clinicians. This could improve clinical practice, enhance patients' and families' psychological well-being and help patients to make appropriate decisions and prepare for their death.Read moreRead less