Iain A Malcolm
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iainamalcolm.bsky.social
Iain A Malcolm
@iainamalcolm.bsky.social
Hydrologist, fisheries scientist, mountain biker, hiker. Science lead at SG Marine Directorate. Hon. Prof. at University of Aberdeen. Instream hydroecology, salmonids, fish assessment, river temperature, water quality. Personal Account. All views my own.
Dark forces are preventing us fighting the climate crisis – by taking knowledge hostage | George Monbiot www.theguardian.com/commentisfre...
Dark forces are preventing us fighting the climate crisis – by taking knowledge hostage | George Monbiot
The fundamental problem is this: that most of the means of communication are owned or influenced by the very rich, says Guardian columnist George Monbiot
www.theguardian.com
November 14, 2025 at 9:09 AM
Transfer of genetic material from domesticated to wild salmon populations through fish farm escapes & interbreeding, is a significant risk to wild salmon populations. Identifying this pressure in wild populations requires the use of informative markers. New paper link.springer.com/article/10.1...
Material Video archive — Reykjavík, Iceland
Archive of videos from the Material Conference — Reykjavík, Iceland — by Joschi Kuphal & Brian Suda
material.is
November 14, 2025 at 7:45 AM
We do not have deliberate and politically driven reductions in long-term govt. science programmes in the UK. Nevertheless, budgetary constraints and a requirement to focus on immediate policy and regulatory data requirements are affecting the freswater data landscape nonetheless.
From NASA to the National Institutes of Health, federal agencies conduct research that universities cannot. Agency scientists speak with Nature about the irreplaceable facilities, institutional knowledge, and training opportunities that the country is losing. 🧪
Insiders warn how dismantling federal agencies could put science at risk
From NASA to the National Institutes of Health, federal agencies conduct research that universities cannot. Agency scientists speak out about the irreplaceable facilities, institutional knowledge and training opportunities that the country is losing.
go.nature.com
November 9, 2025 at 4:16 AM
Reposted by Iain A Malcolm
From NASA to the National Institutes of Health, federal agencies conduct research that universities cannot. Agency scientists speak with Nature about the irreplaceable facilities, institutional knowledge, and training opportunities that the country is losing. 🧪
Insiders warn how dismantling federal agencies could put science at risk
From NASA to the National Institutes of Health, federal agencies conduct research that universities cannot. Agency scientists speak out about the irreplaceable facilities, institutional knowledge and training opportunities that the country is losing.
go.nature.com
November 8, 2025 at 11:32 PM
Reposted by Iain A Malcolm
I’m delighted to share that our latest research has just been published in HESS.

We developed an unsupervised workflow to estimate river surface velocities from videos. Testing on 11,000+ videos against 274 gauging measurements showed excellent agreement.

hess.copernicus.org/articles/29/...
Unsupervised image velocimetry for automated computation of river flow velocities
Abstract. Accurate, long-term measurements of river flow are imperative for understanding and predicting a broad range of fluvial processes. Modern technological advances are enabling the development ...
hess.copernicus.org
August 14, 2025 at 8:38 AM
New paper on effects of captive rearing of Atlantic salmon on body morphology in context of stocking "Humanity often tries to engineer its way out of environmental crises. But nature isn’t easily replaced. Sometimes, the best solution is to give it the space to recover on its own" bit.ly/4oykzmy
Wild salmon are the Zendayas of the fish world – what that tells us about conservation
Wild salmon look incredibly symmetrical but captivity makes them more lopsided, stressed and less able to survive in the wild.
theconversation.com
August 14, 2025 at 9:41 AM
A fantastic job opportunity for someone to work at the interface between Atlantic salmon habitat modelling and management. Cutting edge research as part of an excellent project team.
Postdoc offer : Remote sensing modeler of Atlantic salmon river habitat suitability
We are looking for a resourcefull person with cross-over expertises in remote sensing (Lidar and satellite imagery), programming, wildlife habitat modelling... and ideally hydraulic modelling and AI. ;-)
July 28, 2025 at 3:38 PM
New recommendations for water regulation in England and Wales. In Scotland of course the water industry is publicly owned through Scottish Water.
New ‘integrated regulator’ should replace Ofwat and drive ‘fundamental reform’ of the water sector, review finds – business live
New ‘integrated regulator’ should replace Ofwat and drive ‘fundamental reform’ of the water sector, review finds – business live
The Independent Water Commission’s final report sets out recommendations for reform to improve the water sector regulatory system in England and Wales One of the Independent Water Commission’s most important recommendations is the creation of a new integrated water regulator for the sector in England, and a single water regulator in Wales. These new body would replace Ofwat, the criticised regulator which the Guardian reported on Friday was to be abolished. A single regulator would be able to oversee all operations of a water company from all angles and come to a ‘whole firm view’ of performance issues and compliance failures – some of which may interrelate and may not have been adequately understood in the current model, where cooperation between regulators is limited. This could deliver greater accountability in the regulatory framework with one organisation and one board responsible and accountable for the outcomes of the sector. Although a merger inevitably presents uncertainty in the short-term, in the long-term it should create greater stability overall for the regulatory system – establishing the clear and objective conditions necessary to attract investment. This sector requires fundamental reform on all sides – how we manage the demands on water, how the system is regulated, how companies are governed and how we manage the critical infrastructure on which we all rely. It may sound academic, but it is profoundly important. A clear set of national priorities for water – covering the water industry, agriculture, land-use, energy, transport, housing development – is essential. Without it, we will continue to be dogged by inconsistency, short termism, unintended consequences and risk willing the ends without ever fully understanding the means required. a long-term, cross-sector strategy for water. the modernisation of the legal framework for water regulatory changes, including a new integrated regulator for water greater transparency in areas such as operator self-monitoring and scrutiny of water company reporting the introduction of a single social tariff, to improve affordability and customer service Changes to the economic regulation of water companies, including “a company-specific supervisory function” that would feed into the current price review structure New national resilience standards for infrastructure, to help guarantee the maintainance of underground pipes and other water and wastewater assets Continue reading...
www.theguardian.com
July 21, 2025 at 6:35 AM
1. Accurate (unbiased and precise) quality controlled data are essential for understanding and monitoring trends in river temperature. However, researchers often collate and analyse data without consideration of these issues. A new 📜 & summary🧵 onlinelibrary.wiley.com/doi/10.1002/...
The Influence of Equipment Bias on Reported Temperature Trends: Implications for River Temperature Monitoring Networks
River temperature is an important control on ecosystem health. Concerns around climate change impacts and availability of lower cost sensors have led to an increase in temperature monitoring of aquat....
onlinelibrary.wiley.com
July 19, 2025 at 4:34 PM
Reposted by Iain A Malcolm
Do poor growth conditions at sea result in salmon returning to rivers to spawn at a younger or older age? New study shows that that rapid growth can lead to later maturation but maturation age can be influenced by shifts in growth during the marine migration link.springer.com/article/10.1... 🐟
June 22, 2025 at 7:53 PM
1. Are you interested in assessing the status of Atlantic #salmon and brown #trout populations using electrofishing data? If so then this 🧵 is likely to be of interest to you. The latest report from the National Electrofishing Programme for Scotland #NEPS was published this week bit.ly/4jNrXH6 🧪🌎
June 13, 2025 at 12:06 PM
Up above Loch Tummel. Time to go hunt for that pot of gold.
April 27, 2025 at 9:02 PM
Islay, distillery tour by bike. Time well spent in good company
April 15, 2025 at 10:29 PM
River temperature forecasts are likely to be required to inform fisheries management decisions under a rapidly changing climate. Interesting new paper: hess.copernicus.org/articles/29/...
Extended-range forecasting of stream water temperature with deep-learning models
Abstract. Stream water temperatures influence water quality, with effects on aquatic biodiversity, drinking-water provision, electricity production, agriculture, and recreation. Therefore, stakeholder...
hess.copernicus.org
March 28, 2025 at 9:21 AM
Craster to Seahouses #Northumberland
March 12, 2025 at 4:59 PM
Protection & creation of riparian woodland is one of the few management options available to mitigate river temperature increases under climate change. "riparian buffers wider than 15 m protected against water temperature increases..." agupubs.onlinelibrary.wiley.com/doi/10.1029/...
agupubs.onlinelibrary.wiley.com
March 12, 2025 at 9:05 AM
Another day on the Northumberland coast😁
March 9, 2025 at 11:55 PM
Reposted by Iain A Malcolm
Why the hell doesn't Starmer do this about Farage...
This is leadership.

Prime Minister Justin Trudeau in his final days in office asks Canadians to ask WHY.

Why does the leader of Canada’s conservatives REFUSE to get security clearance?

Why does he REFUSE to put Canadians first? It isn’t a slogan when it’s not backed up. It’s a lie.

#cdnpoli
Why Won’t Pierre Poilievre Get His Security Clearance?
YouTube video by Justin Trudeau
youtu.be
March 9, 2025 at 10:44 AM
Unwinding on the Northumberland coast. Beach walks, dogs, beer, food. Is there a better tonic?
March 7, 2025 at 6:26 PM
egusphere.copernicus.org
March 4, 2025 at 11:28 AM
"...we provide an updated global assessment of farmed salmon escape policies. Our findings reveal a rapid rise in the spread & implementation of escape regulations globally & the development of new technologies that aim to address this problem. www.sciencedirect.com/science/arti...
www.sciencedirect.com
March 2, 2025 at 11:23 AM
Reposted by Iain A Malcolm
An improvement in freshwater biodiversity in England's rivers in the 1990s and early 2000s was linked to reduced zinc and copper pollution as coal use and heavy industry declined, say researchers.

Read more about a new UKCEH-led study: www.ceh.ac.uk/press/biodiv...

#rivers #WaterQuality 🧪 1/
Biodiversity in England’s rivers improved as metal pollution reduced
An improvement in freshwater biodiversity in England’s rivers was linked to reductions in pollution of zinc and copper, largely due to the decline of coal burning and heavy industry, according to a st...
www.ceh.ac.uk
February 18, 2025 at 1:09 PM
It can be challenging to design and implement freshwater fish assessment methods at international scales due to differences in sampling methodologies and habitat characterisation. Here we consider opportunities to harmonise data to inform sea trout assessments doi.org/10.1002/aqc....
Spatial Variability in Juvenile Sea Trout Data Collection and Assessment Methods Across Europe: Limitations and Opportunities for Standardising Analyses
Brown trout (Salmo trutta L.) is a widely distributed fish species native to Europe, with high phenotypic plasticity, including resident and anadromous (sea trout) forms. Many populations are in decl...
doi.org
February 18, 2025 at 6:29 PM
Juvenile chinook dispersal patterns identified through genetics "temperature was a dominant driver of dispersal, with individuals originating from warmer sections of the mainstem typically moving to cooler mainstem sections or tributaries" movementecologyjournal.biomedcentral.com/articles/10....
Watershed-scale dispersal patterns of juvenile Chinook Salmon (Oncorhynchus tshawytscha) revealed through genetic parentage analysis - Movement Ecology
Background For many aquatic taxa, juvenile dispersal from spawning locations to rearing habitats is a critical process influencing individual fitness and population dynamics. However, our understandin...
movementecologyjournal.biomedcentral.com
February 15, 2025 at 1:03 PM
Reposted by Iain A Malcolm
The Lancet, considered by some to be the world's leading medical journal (no, it is not a radical-Marxist-left-wing-rag), is living up to its well-deserved reputation and is not mincing words about the Musk administration's actions and their consequences: www.thelancet.com/journals/lan...
American chaos: standing up for health and medicine
Withdrawal from WHO and the Paris Agreements. USAID shuttered and aid halted, ceasing health programmes globally. A freeze on US$3 trillion worth of federal grants and loans, jeopardising the function...
www.thelancet.com
February 9, 2025 at 8:46 AM