PEARG research blog

Ary's alma mater, La Trobe University, have recognised his achievements with an award and a nice profile article here. There's also a video interview

Words: Melissa Carew Freshwater invertebrates are the insects, snails, clams, mites, crustaceans, and worms that inhabit streams, rivers, ponds and wetlands. They play an important role in understanding the health of our freshwater environments. The biodiversity of invertebrates present in freshwaters is routinely used by water managers to assess the ecological condition and feeds into decision making about stream management. Biodiversity of …

Words: Tom Schmidt When researchers want to investigate evolutionary processes like adaptation and dispersal, they frequently make use of population genomic methods. Population genomics uses DNA data from across an organism’s entire genome – that is, across all of that organism’s DNA. This DNA data can be compared with DNA from other organisms, which can help shed light on their shared …

Belinda van Heerwaarden, The University of Melbourne and Ary Hoffmann, The University of Melbourne Evidence of declining fertility in humans and wildlife is growing. While chemicals in our environment have been identified as a major cause, our new research shows there’s another looming threat to animal fertility: climate change. We know animals can die when temperatures rise to extremes they cannot endure. …

“This article was first published on Pursuit. Read the original article.” Dr Andrew Weeks and Professor Ary Hoffmann In the critical battle against extinction, conservationists use a variety of tactics to try to save species. One of the most fundamental tools is maintaining the amount of variation of genetic material (DNA) in a group of animals - this is described as their “genetic …

The loss of fertility in males as a result of climate change, particularly in the tropics, may be a better predictor of vulnerability to extinction by Dr Belinda van Heerwaarden This article was first published on Pursuit. Read the original article As temperatures rise across the globe, species will increasingly face environmental conditions beyond their tolerance limits, posing a major risk to biodiversity, …

This article was first published on Pursuit. Read the original article. Words: Dr James Camac, Nicholas Bell and Professor Ary Hoffmann We currently face significant challenges to accurately predict the impacts of our changing climate on individual species, as well as their ecosystems. A recent report on the demise of an area of snow gums in the Kosciuszko and Namadgi National Parks highlights …

Words and images: Véronique Paris and Christin Manthey Illustraions: Marianne Coquilleau Doing a PhD in science is a challenge in itself. Developing and managing your own project, learning to be a “real” research scientist rather than a student, working on experiments, collecting data, applying for funding ... that’s all part of the deal. However, 2020 added another flavour into the mix – …

Words: Ary Hoffmann Banner image: Natasha Wright, licensed under Creative Commons Attribution 3.0 License. In Asia, one of the most damaging pests of rise is the brown planthopper, Nilaparvata lugens. This pest damages plants directly but more importantly it acts as a vector for damaging plant viruses, including the “rice ragged stunt virus” (RRSV). This virus cannot spread by itself but relies …

Words, illustraions and photos: Marianne CoquilleauMarianne Coquilleau With spring coming our way, gardens come to life and with it their many inhabitants. It’s no surprise then to find small caterpillars, aphids and other insects while washing your vegetables and fruits, especially if you source your vegetables locally or pesticide-free sources. You might then also notice some little lines on your leafy …

Words by Samantha Ward & Marianne Coquilleau Illustrations by Marianne Coquilleau Photographs by Samantha Ward UPDATE - Samantha & Marianne have been interviewed on radio stations 2SER and The Pulse about their journey LINK 2SER || LINK The Pulse Concluding the postgraduate journey Covid-19 has shaken up the world as we know it. Everyone has been affected in some capacity, either in a personal or …

Banner image: Nancy with scientists from the Wolbachia dengue program at the Institute for Medical Research, Ministry of Health, Kuala Lumpur, Malaysia. Words and photos: Nancy M. Endersby-Harshman Our paper published two weeks ago in Insects is the result of a research collaboration between PEARG at the University of Melbourne, the Institute for Medical Research (IMR), Ministry of Health situated in Kuala …

This article was first published on Pursuit. Read the original article. By Professor Ary Hoffmann, Vanessa White and Professor Michael Kearney The Key’s Matchstick Grasshopper, or the Keyacris scurra, was once widespread and abundant in New South Wales, the Australian Capital Territory and north-central Victoria, but over the past century its numbers have seriously declined. So much so that in NSW, it has …

This article was first published on Pursuit. Read the original article Francesca Noakes and Professor Ary Hoffmann Any home gardener knows of the long-running battle against insect pests. The little critters that sneak into your garden beds and strip leaves are irritating among prized kale, but for farmers these tiny pests can have devastating economic impacts. In the Australian grains industry, insect pests are …

This article was first published on Pursuit. Read the original article Dr Tom Schmidt Everyone knows mosquitoes can fly. Not everyone knows they fly in pressurised cabins 10,000 metres above the ocean. In fact, many of the most dangerous mosquito species get flown all over the world in aeroplanes, or travel on boats or other vehicles. These days there are more plane and …

This article was first published on Pursuit. Read the original article here. Authors: Dr Nancy Endersby-Harshman, Dr Qiong Yang, Dr Tom Schmidt and Professor Ary Hoffmann Around the world, pest insects – like mosquitoes – often become resistant to the insecticides meant to control them, causing problems for agriculture and public health. Resistance in multiple populations of a species might be due to independent …

Meet Moshe Jasper, Research Assistant in PEARG. Moshe shares what inspired him to become a scientist and what he wishes he had known when he was an undergraduate student. What is it like to work in PEARG ? The Pest & Environmental Adaptation Research Group undertakes research on adaptation of organisms (particularly invertebrates) to environmental stresses. As a Research Assistant I do …

Ary Hoffmann Charles Darwin in his On the Origin of Species used data from domestic animals to argue for the power of natural selection in changing phenotypes. These included examples from birds and dogs as well as livestock. The latter having been selected across many years to increase productive yields such as milk and meat. A global industry has grown up …

The Australian Grains Pest Innovation Program (AGPIP) is offering 4 fully funded scholarships at the University of Melbourne for potential PhD or MPhil students interested in cutting-edge science, environmental sustainability and agricultural innovation. AGPIP is a collaboration between the PEARG and cesar. The program is aimed at improving the sustainability of invertebrate pest management practices among Australian grain growers through the development …

This article was first published on Pursuit. Read the original article. Authors: Dr James Camac, Nicholas Bell and Professor Ary Hoffmann This summer’s devastating Australian fires and their continuing impact on biodiversity serve as a stark reminder of the challenges in nature conservation as we head into an increasingly volatile future driven by climate change. It is no longer sufficient to protect land …

Pest control is recognised as an important part of crop production. Against a background of increasing concern for chemical impacts on the environment, Integrated Pest Management programs have been developed where chemical application and natural enemy enhancement work together to maintain productivity with reduced environmental impact. Such programs require good science, general theory and strong linkages between science and management. …

“This article was first published on Pursuit. Read the original article.” Dr Perran Stott-Ross and Professor Ary Hoffmann Bushfires. Coral bleaching. Heatwaves. These disastrous events are a harsh reality in Australia. And they’re only going to become more frequent and severe with climate change. Last year, 2019, was Australia’s hottest year ever recorded, and records will continue to be broken. Climate change will …

Words: Perran Ross Wolbachia are endosymbiotic bacteria found within the cells of many insects, from butterflies and bees to cockroaches and dung beetles. Wolbachia are so common because they often provide their insect hosts with an advantage, aiding their spread through populations. Whether an insect carries Wolbachia is an important question, especially if they’re a pest or vector. Wolbachia can affect host …

Words: Samantha Ward Images: Words: Samantha Ward & Marianne Coquilleau Flying the flag for the PEARG lab! [Photo credit: Marianne Coquilleau] I am a scientist. A taxonomist, to be more specific. Taxonomy is the study of naming, defining, and categorising organisms. There’s a job for that?! Actually, we still have no idea how many species are on Earth! There could be between 5.3 million …

Words and images: Véronique Paris It’s 7.30 Saturday morning – what are your plans for the day? While you may be still in bed contemplating a coffee, or still sound asleep, I’m packing the PEARG ute with a stack of small buckets, strips of red felt, some rabbit food, and a 20lt jerrycan of water. I perform the usual safety checks, …

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Words: Tim Thwaites, Science writer Banner image credit Casamento Photography Tracking disease-carrying mosquitoes, helping to conserve mountain pygmy possums, stopping the spread of dengue fever, studying how insects develop resistance to pesticides—solving such disparate biological problems nowadays depends on being able to handle enormous quantities of genomic data. And that’s why they land on the desk of Jessica Chung.As a bioinformatician her …

Words and images: Meng-Jia Lau Behaviour is one of the most complex study areas in biology because it involves a combination of many factors that are often quite variable. In mosquitoes, host-seeking is the behaviour of females seeking a blood meal which provides the extra protein they need in order to lay eggs. The biting process not only makes people feel itchy, …

Words: Nick Bell When our scientific endeavours leave the lab and move into real-world deployment, a number of challenges crop up. Aside from obvious issues around myriad variables that cannot be controlled as they can in the lab, large scale logistical and financial considerations need to be made when rolling out new operations. This scaling issue becomes acutely important where a …

Words - Eddie Tsrline Images - Eddie Tsyrlin and John Gooderham  Towbiters, water scorpions and Nosy Tigers. These are just some the colourful names given to freshwater insects and other invertebrates. And there is a more serious side to these quirky creatures. The Nosy Tigers are a diving beetle larva with a peculiarly elongated head. Their main interest in life is to voraciously …

Our freshly published open access paper in Current Biology is the culmination of several years of work with a large team of very talented and dedicated researchers. Rather than rehash the story here, please see press releases below: Press release from the UniMelb newsroom  (alternatively at Bio21's siteBio21's site or at SciMex) Brief summary article in Cosmos magazine Interview with Ary …

Words and images: Perran Ross Modified mosquitoes raised in laboratories are being released into the wild in disease control programs. These mosquitoes will still bite you, but they’re less capable of transmitting the viruses that cause dengue fever, Zika and more. This antiviral effect is caused by infection with a bacterium called Wolbachia, which occurs naturally in most insect species. This …

This article was first published on Pursuit. Read the original article. Professor Ary Hoffmann Eucalypts, wattles, banksias, grevilleas and other Australian native plants are some of the most fascinating and unique flora on Earth. They also play an important part in revegetation programs around Australia, which aim to restore plant-life to areas where the species used to grow, before activities like agriculture, forestry, …

Words: Véronique Paris Cover image art: © Marianne Coquilleau & Butterfly Adventures Almost every child is familiar with the famous story ‘The Very Hungry Caterpillar’, illustrating the transformation of an unremarkable hungry caterpillar into a beautiful butterfly. What exactly takes place within the pupal cocoon during the transformation remains a mystery. The scientific definition of this dramatic change is known as ‘complete …

This article was first published on Pursuit. Read the original article. Associate Professor Michael Kearney and Professor Ary Hoffmann People usually go to cemeteries to visit or bury their dead but, in the name of research, we visited 25 cemeteries in Victoria, NSW and the ACT to try and find a tiny rare species of grasshopper thought to be extinct in …

Words and images: Perran Ross When animals raised in captivity are released back into the wild, you might picture cute and furry mammals from an endangered species. But in many countries around the world, people are releasing mosquitoes raised in laboratories into the environment. These mosquitoes feed on human blood and are vectors of dengue, Zika and other diseases, so it …

Using bacteria to control mosquitoes Dr Tom Schmidt and Professor Ary Hoffmann “This article was first published on Pursuit. Read the original article.” Living inside the cells of insects is a type of bacteria that is looking increasingly like the key to controlling the spread of dengue fever, the Zika virus and other mosquito-borne diseases. The Wolbachia bacteria, which occurs naturally in about half …

Words: Ary Hoffmann One of the central tenets of conservation biology is that high levels of genetic variation in natural populations is important for their long-term survival. High levels of variation allow populations to adapt to changing environments through evolution. This process is now recognised as being extremely fast when selection pressures are high. In fact many populations of animals and …

We are seeking motivated MSc students to apply for several projects starting next year. Enquiries via pearg-queries@unimelb.edu.au Project 1/4: Exploring bacterial symbionts for agricultural pest control PEARG is researching ways to control important agricultural pests such as aphids and mites that cause millions of dollars in damage to crops each year in Australia. This project will involve testing the potential for endosymbiotic …

NEW paper! Dispersal is a key component of the ecology and evolution of animal populations. It allows animals to colonize new habitats, escape deteriorating conditions, and locate mates. When animals disperse and breed successfully in new habitats that are already occupied by the same species, there will be an exchange of genes. This exchange is essential in maintaining the health of …

Original article published on The Conversation Words: Tom Schmidt, Andrew Weeks, and Ary Hoffmann We might not be able to use common insecticides to kill mosquitoes that arrive from other countries. from www.shutterstock.com Planning a trip to the tropics? You might end up bringing home more than just a tan and a towel. Our latest research looked at mosquitoes that travel as secret stowaways on …

Words and images: Oliver Stuart Link to open access paper Earwigs (Dermaptera) are a challenging group of insects to study. In Australia, earwigs are variously known as pests, predators of pests (so, beneficial insects), or both at once depending on the crop type and other particulars. The invasive Forficula auricularia (the European earwig) is the most common pest, but we also have …

A recent review paper in Biological Conservation by Francisco Sánchez-Bayoa and Kris Wyckhuys has sparked considerable media attention on the plight of insects and the need to conserve them. In amongst the noise, PEARGs own Linda Thomson was interviewed by The New Daily about what you can do in your own back yard to help.    

The National Environment Agency of Singapore released Wolbachia infected male mosquitoes last April in order to suppress the local population. The field study has been a fantastic success with an 80% population reduction achieved in the last nine months. Ary is a member of Singapore's Dengue Expert Advisory Programme, providing expertise and guidance for the program. Read more about it …

With temperature records being smashed around Australia people are paying ever more attention to climate change. As Adelaide has set a new record maximum temperature ABC's Adelaide reporter Malcolm Sutton interviewed Ary for an article, loosely based around our open access review in Austral Ecology

Header photo: Marianne Coquilleau, Samantha Ward, Xuan Cheng, Josh Douglas, Tom Schmidt and Oliver Stuart  Words: Oliver Stuart and Samantha Ward Introduction This past September was the 49th Annual General Meeting and Scientific Conference of the Australian Entomological Society (AES). The Society publishes an Australia-focused journal and maintains, through its membership, a network of professional and student entomologists. Every year the network …

Words: Daronja Trense Images: Daronja Trense & Klaus Fischer One of the projects of my PhD is to investigate the genetic connectivity of the Copper butterfly (Lycaena tityrus) in the Ötzvalley of the European Alps. In summer 2018, we collected 186 butterflies to understand how the geological structure of the valley has influences the genetic constitution of L. tityrus. PEARG provided me the …

Please follow this link to Ary's recent interview on Three Triple R FM

Words and images: Perran Ross Mosquitoes in the wild live it rough. Adult females risk being swatted as they search for a blood meal and their larval progeny must fend off predators and compete for limited resources. When we want to study mosquitoes under controlled conditions we bring them into the laboratory, but these conditions often don’t reflect their natural environment. …