What can 55 years of studying bottlenose dolphins teach us? 🐬 This long-term program in Sarasota Bay, Florida, has helped researchers develop new technologies while improving the welfare of the animals. With our @frantsjensen.bsky.social and led by Peter Tyack. #MarineEcology #Science 🌐🌏🧪🌱🔊

The Strait of Gibraltar is one of the busiest shipping lanes in the world and is also home to an endangered population of long-finned pilot whales. Recently, @milouh.bsky.social & co showed that these whales now need to shout to make themselves heard over the noisy ships doi.org/10.1242/jeb....

New paper on disturbances to pilot whale communication @frantsjensen.bsky.social 🐋🌱🧪🌐🌏 #OceanNoise #Bioacoustics #Science #MarineEcology

Our contributions at this year's European Cetacean Society conference 🐬🌊 Included posters, workshops, and Marina Arregui took the main stage to present her research on mercury stable isotopes in Arctic/subarctic toothed whale species, to better track contamination 🐋 @au.dk #ECS2026 #Science

Polarfronten has published a popular article on bowhead whale research in Greenland by Dr Fredrik Christiansen. Linked in the thread. Drones are used to assess diets and body condition for assessing the effects of climate change on food availability. Drone footage: youtu.be/tUXBpOmcEDM?... 🌱🐋🇬🇱🌐🌏🧪

Recent fieldwork in East Greenland 🇬🇱🐻‍❄️🦭 Valuable wildlife and human samples were collected to explore the links between traditional diets, high contaminant exposure, immune system function, and other physiological effects🌐🌏🌱🧪 #Arcticresearch #Science #Contaminants Details in thread and caption 📹

Contaminant levels in harbour porpoises from Danish waters have declined over the past 30 years 🐬👏 ✔️Long‑term improvements reflect the impact of national and international bans. ✖️ Continued pressures on the critically endangered Baltic population. link below: 🧪🌐🌏🌱 #marineecology #Science @au.dk

🐬🐬🚢 The paper behind our recent research on ship noise and harbour porpoises in Danish waters is now available on the Wiley Online Library. Read it here: onlinelibrary.wiley.com/doi/10.1111/... #MarineEcology #Wildlife #MarineMammalScience #Research #HarbourPorpoise 🌱🧪🌏🌐

Our recent study in Ecological Modelling shows that southern right whale mother-calf pairs leave calving grounds once calves reach ~8 m in length, not after a fixed time. Larger, fatter mothers help calves reach departure size faster! 🐋⚡ Read it here: www.sciencedirect.com/science/arti... 🌐🌏🌱🧪

Our recent study in the Journal of Experimental Biology demonstrates how body size and condition reduce heat loss in southern right whales & that they do not need to migrate to warmer waters to offset heat loss in their newborn calves🐋 #marineecology #Science #marinemammalresearch #Rightwhales 🌐🌏🧪🌱

A new collaborative study explores how EMF from subsea cables may be felt by harbour porpoises 🐬🌊 More details linked in the video 🌐🌏 @au.dk #offshorewind #marinemammalresearch #Science🧪

Thanks @mattidcarter.bsky.social for the fantastic effort in bringing together data from all over the North Sea. This will bring the distribution and habitat use of harbour and grey seals to a whole new level!🦭 + our Jonas Teilmann, Anders Galatius, Rune Dietz & Jacob Nabe-Nielson contributed 🧪🌐🌱🌊

2 hydrophones were carried into the Kattegat by storm, presumed lost... Vegar finds one south of Hurum! Sees our labels and gets in touch. Legend. A local rescue mission begins & all instruments were located. Data retrieved! The result was joy all round 🦭🔊🛥️ story: www.facebook.com/RibRoy/posts...

Last week, our 2 PhD students & colleagues successfully conducted a full turnover of 8 #acousticrecording stations 🎧 out in Aarhus Bay 🌊. The data feeds into a year-round #marinesoundscape monitoring programme to assess #noisedisturbance for #harbourporpoises 🚢🐬(funded by AVJ Naturfond).

At Science Week, Greenland 🌏🇬🇱 7 years of aerial survey data reveal abundance and habitat selection of the genetically distinct Kangia ringed seal, uniquely adapted to the UNESCO-listed Ilulissat Icefjord🦭🌱🌐🧬 Rikke presented research, with Aqqalu Rosing-Asvid (Pinngortitaleriffik) @GINR 🔗s in 📷

🔊 New volume covering oceanic dolphin species Ridgway & Harrison’s Handbook of Marine Mammals: An expert-written review & fantastic resource for anyone working with/ fascinated by marine mammals 🌊🐬 Our Anders Galatius has contributed the chapters on white-beaked & Atlantic white-sided dolphins 🧪🌏

It's live! Please see my new paper in Ecological Informatics on the #detection and #categorization of frequency notched echolocation from wild recordings. 🐬🔊👇 www.sciencedirect.com/science/arti...

First up we have Prof. @jonasteilmann.bsky.social giving an overview of the hight ambitious North Atlantic #minkewhale #tagging project.

Live from the Danish Marine Mammal Symposium! Here I'll be posting talks given by @marinemammalsau.bsky.social scientists! Stay tuned 🐋🐬🦭🌊🚢🔊

This week, Sweden had their first marine mammal research symposium, hosted by Johanne Stedt at #LundUniveristy This brought discussion for further scientific meetings, presentations of new #MarineMammalResearch and collaborations between the Scandinavian countries. 🐋🌍 🌱🐬 🌐 🧪

AU and NIRAS are monitoring the critically endangered Baltic harbour porpoise through the international project SAMBAH II 🌐🐬 Since last week, all equipment deployed in summer 2024 to log echolocation clicks from porpoises has been safely retrieved! 📷 captions for more details sambah.org 🧪

Our recent study in the #MarineEcologyProgressSeries highlights how body size, condition, and human impacts shape the survival of right whales & why they are so vulnerable to prey limitation and disturbance 🐋 🔗 in thread #Conservation #WhaleResearch #RightWhales #OceanHealth #MarineScience 🌐🌏🧪🌱

New York Times article discusses @nature.com paper by our Rune Dietz, Christian Sonne, and others at @au.dk and the University of Copenhagen 🌐🐋🧪🌏 @newyorktimeshaiku.bsky.social @ucph.bsky.social #Science #Research #impact #Mercury #Arcticchange

Our Rikke on fieldwork in Maniitsoq, Greenland 🇬🇱 Collecting samples to study #genetics, #feedingecology, #reproduction, and the presence of pharmaceuticals & other #persistentchemicals in harbour porpoises. See photo captions and link for project details 🐬🌐 veluxfonden.dk/en/projekt/p... 🌱🌏

We have redefined Dolphin Taxonomy 🐬 5 former Lagenorhynchus species have been reassigned to the new/revived and redefined genera: Aethalodelphis, Leucopleurus & Cephalorhynchus #marinemammalresearch #globalecology #marineecology #cetaceans #research #genetics #science 🐋🌱🧪🌐🌏

We are underway with the retrieval of detached data storage tags in the #WaddenSea 🇩🇰🦭 See photo captions and previous posts on our page for the building of retrievable tags and their deployment @au.dk #Science #biomonotoring #research #marineecology #marinemammalreasearch 🌐

PhD student Emilie Stepien uses satellite tags, CATS Cams and drones to observe seal reactions to shipping in the Wadden sea 🇩🇰 Watch a pregnant seal reacting to a sea eagle caught on drone video 🦅🦭 @emstepien.bsky.social 🧪🌐 #Wildlife #WaddenSea #HarbourSeal #AnimalBehaviour #MarineEcology

Our Senior Researcher Fredrik Christiansen recently completed the third photogrammetry field season on bowhead whales in Disko Bay, Greenland. See Thread. 🌐🌏🐋🧪 @FChristiansen.bsky.social #marinemammology #ecology #cetaceanresearch #Arctic #MarineEcology #Research #Science

🔊 Presenting the first range-and genome-wide population genomic analysis of grey seals! 🦭🌐 3812 nuclear SNPs genotyped in 188 samples from 17 sites identified 6 distinct populations and historic bottlenecks with ongoing recovery effects 🧪🌊 @au.dk doi.org/10.1111/mec.... #Science #marineecology

This week I'm out in the Danish #BalitcSea on the #SAMBAHII Project, working to monitor the remaining 500 Baltic #harborporpoise. Here, we are deploying a 4-channel array to calculate the #dectectionFunction, or the likelihood of detecting porpoise #echolocation in the study area.

🔊Paper out today with @nature.com! Despite decreasing emissions 🌏 mercury levels are rising in some species. Hg Isotopes could reveal why. Our new research shows ocean currents, may now be the main source of mercury in Arctic ecosystems. 🌐🧪🐻‍❄️🐋 @au.dk #Arctic #Mercury #Greenland #MarineEcology

After months of hard work, I finally submitted my master’s thesis! 🥳 Super proud of our work and deeply grateful to my supervisors Frants and Jeanne, and the whole @marinemammalsau.bsky.social team for being family during this time. Now fingers crossed for the defense! 🤞 #marinemammals #bioacoustics

🔊 Breaking news on foraging plasticity: Bryde's whales can decide to interrupt ongoing feeding for different reasons🐋🐟👀... Find out more on one of my PhD chapters we just published on Ethology Ecology & Evolution. tandfonline.com/doi/full/10.10… @marinemammalsau.bsky.social 🧪

Rune Dietz presented results on PFAS in Danish wildlife at #Naturmødet 2025, together with Neils Kanstrup. Dangerously high levels found in birds especially around Harboøre Tange and Agger Tange #Science #Research #MarineEcology #dkgreen 🧪🌐🐋 Recent report (Danish): dce.au.dk/fileadmin/dc...

Where should we build offshore wind farms for minimimal impacts on marine species? Discussed by Jacob Nabe-Nielsen from @au.dk on #Naturmødet in Hirtshals. He presented results from the Screening project that will facilitate a sustainable green transition in Denmark #dkgreen #Marineecology 🧪 🌐 🐋

Check out this piece on some of our latest findings on dolphin communication, in research led by our colleague Laela Sayigh.

In collaboration with researchers at NIRAS, we at @marinemammalsau.bsky.social undertook a baseline study to understand the #USBL impact on porpoise presence in the #NorthSea. We had control and impact #PAM stations, where impact stations were within 3.5 km of known USBL survey activity. 🧵2/6

The prevalence of ultra short baseline acoustic position systems, also known as USBLs 🔊, is understudied in #EuropeanWaters and its effect on marine mammals 🐋, such as the #harbourPorpoise, is mostly unknown. These systems are used in #geophysicalSurveys and during #trawling fishing activities. 🧵1/6

Our PostDoc Marina Gil has just returned from Greenland 🇬🇱 Together with local hunters, she collected samples for the AMAP CORE program - monitoring pollution in Greenland biota since 1994. It holds some of the longest time series data for Arctic wildlife 🐻‍❄️🐋 More in the photo captions 🧪 www.amap.no

Noise pollution isn’t just an inconvenience! 🔉🐬 it can disturb entire marine ecosystems. Understanding how noise disturbance affects wildlife populations requires powerful models, lots of data and a dedicated team. See the thread for what is going on in AU Ecoscience #marinemammalresearch 🌊

🎙️ 🐋 🎧 Eavesdropping on whale showdowns -- Sperm whales are stressed, orcas are mean, and the section @marinemammalsau.bsky.social is all ears for the juicy underwater drama ✨💅🏼 Great #ECSconference2025 preview talk and fantastic visualisation by @emilytgriffiths.com presenting Mel Cosentino’s work!

CATS Cams successfully deployed! 26 harbour seals in the Danish Wadden Sea have just been tagged to study the impact of tourism 🦭 This included deployment of 10 CATS Cams and Daily Diary loggers in a new comparative study on foraging ecology between Danish harbour seals and Australian fur seals🧪

go.bsky.app/GvVGHgK Those of us currently on BlueSky:

This week, our researchers are preparing for fieldwork in Sarasota Bay, Florida, to collect acoustic data on bottlenose dolphins 🐬. While prepping the equipment, students from our Acoustic Ecology Lab took part in DTAGs tracking training. They were happy to see how their data is collected! 🔊🌊

Jonas & Rune building tags for next week’s seal tagging trip to the Danish Wadden Sea! 🦭 Using CATSCAM & behavioural tags to capture hunting in action! 🎥🐟 How do harbour seals react to tourist disturbances? + a comparative study of foraging behaviour to Australian fur seals with @DeakinUniversity.

The grey seal is back in Denmark after nearly a century!🦭 'To inform management of the budding Danish breeding population, we are telemetry tagging and genetically profiling a sample of the few pups born in 🇩🇰 to get data on their relatedness, movements and habitat use.´- Anders Galatius 📷 Last week

Welcome to the Marine Mammal Section at Aarhus University! 🐋 (@au.dk) Here, we will share weekly updates on our research, discoveries and fieldwork, along with insights from our team of wildlife researchers🐬🐻‍❄️🦭. If you are interested in what we do, stay tuned. We have a lot to share.. ✨