For many researchers, the application of statistical tests to obtain a P-value (probability) for our observations or experimental results is a crucial component of our work. P-values often determine the next step in our research, our research funding, and can even change the development of whole fields of science. Yet P-values are rarely reliable indicators of an underlying trend. A growing body of evidence shows that over-reliance on P-values can be uninformative and – at times – misleading, such that some journals now reject any manuscripts that contain P-values. These talks will highlight some common pitfalls in our use of experimental design and statistical testing, and give examples of practical alternatives.
Speakers: Professor Emeritus Geoff Cumming (La Trobe University), Associate Professor Catriona Hurd, Dr Jon Havenhand (University of Gothenburg)
Click here for a Vimeo recording of the seminar.
When: 1pm, Tuesday 13th February
Where: Aurora Lecture Theatre, IMAS Salamanca, Refreshments will be provided
For those interested in delving deeper into these issues, there will be an open 2-hour workshop after the MASS-Panel event in the adjacent Flex-space:
There is now clear evidence across a number of disciplines that published research is often wrong—this is the replication crisis. Reliance on p < .05 is a major cause of the crisis, and has caused massive damage. The rapid rise of Open Science practices in response to the crisis is probably the most important and exciting development for many years in how science is done and data are analysed. It’s already leading to more trustworthy research.
Open Science requires preregistration where possible, open and full reporting, and replication. It also requires improved statistical methods, beyond p < .05, most notably estimation and meta-analysis — i.e. the new statistics, based on confidence intervals. A major obstacle to full adoption of Open Science and estimation is researchers’ deep, deep attachment to p-values and statistical significance. I’ll discuss how this attachment can be addressed, and how Open Science and the new statistics make better sense than traditional approaches. I will discuss and demonstrate an estimation approach to the analysis of data for a range of measures and designs, with an emphasis on using graphical representations likely to assist understanding and statistical communication. I’ll mention our new introductory statistics textbook that takes an estimation and Open Science approach from the very start. I will be happy to try to tailor the choice of topics and examples in accord with the preferences of workshop participants.
Speaker: Professor Emeritus Geoff Cumming
When: 2-4pm, Tuesday 13 February 2018
Where: Flex Space, IMAS Waterfront Building, Salamanca Place, Hobart
12 December 2017
Reef ecosystems harbour a disproportionate proportion of the world’s marine biodiversity and support some of the most important ecosystem services for humans including lucrative fisheries and tourism industries.
This MASS panel-event will cover Reefs of Change from tropical to temperate systems. Firstly it will explore reef ecosystems at large biogeographical scales to determine how temperature underpins species distributions and how re-distributions of species will likely play out under changing climate. Secondly, long-term reef changes observed across Australia will be detailed, including regions undergoing temperate-tropical transitions under both chronic and acute warming. Finally, the dynamics of how reef systems undergo change will be described and concepts of stability, tipping-points and reef resilience will be discussed along with opportunities to thwart unwanted shifts.
14 November 2017
If we are to restrict warming of the planet to 2C or less in the coming decades, we will have to achieve negative emissions by removing large amounts of carbon dioxide from the atmosphere and stowing them away permanently. In the marine realm, there are a range of options that have the potential to sequester additional carbon, from natural (often termed blue carbon) to purposeful manipulation of the carbon cycle (referred to as climate intervention or geoengineering). Today we will compare and contrast the science behind Nature (i.e., blue carbon) and Nurture (i.e., geoengineering), and then frame this debate around the broader environmental regulations required for each approach.
Speakers: Associate Professor Peter Macreadie (Deakin University); Professor Philip Boyd; Aylin Mohammadalipour Tofighi (IMAS)
10 October 2017
The International Code for Ships Operating in Polar Waters, the ‘Polar Code’, entered into force on 1 January 2017 for new ships. Vessels travelling in Arctic and Antarctic waters are now classed into one of three classifications based on their ability to withstand impact with three different types of ice. Ice is the critical factor here, and this presentation will give an overview of what’s in the Code, explain the difficulties of ice-forecasting, and demonstrate the software used as a Bridge Simulator to train ship’s crew in ice navigation.
Speakers: Dr Julia Jabour (IMAS); Dr Jan Lieser (ACE CRC); Scott Laughlin (AMC)
Click here for a Vimeo recording of the seminar.
12 September 2017
There is growing scientific and societal concern about the effects of anthropogenic sound on marine ecosystems. Sources of these sounds are diverse and include ship noise, pile driving, tidal power generation and seismic surveying, which involves the repetitive use of intense acoustic impulse signals to image subsea geology. To date, the effects of seismic exposure on whales has received considerable attention, fish somewhat less, and invertebrates virtually none. This seminar will present recent work examining the effects of seismic surveying on marine invertebrates, through a collaboration with IMAS and Curtin University. We will also explore the extent to which current state, national and international environmental protection regimes adequately respond to marine noise pollution.
8 August 2017
Integrated multitrophic aquaculture (IMTA) is all about turning waste streams from finfish aquaculture into raw materials for further production, providing secondary products and environmental benefits such as nutrient and carbon mitigation and more efficient/ responsible food production at the same time. Seaweeds (primary producers) are an integral component of all IMTA initiatives, but are often thought of as secondary products.