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Emily T Griffiths

@emilytgriffiths.com
74 followers 65 following 51 posts

🇺🇸➡️🇩🇰 Marine Acoustic Biologist. Special Consultant at @marinemammalsau.bsky.social. Room temperature takes all my own.

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Emily T Griffiths @emilytgriffiths.com · 18/07/2026
A PhD student wandered into my office, and complemented an ocean depths poster I have on the wall. 'Oh thanks! It's @xkcd.com.' When she didn't know what was, I started to explain and described it as 'popular during the golden age of webcomics.' I made my elder millennial ass feel ancient.
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Emily T Griffiths @emilytgriffiths.com · 26/01/2026
This gem of an #AI marine logo(?) graced my screen. I can't pick a favorite: - Dolphin tunas - The seal with: - a three point tail - connecting dorsal and pectoral fins - ant eater face merging with sky - Sky whale - Smaller sky polar bear - boat? - MARINNE CONIEERATIO⼏|
Horribly AI generated marine aesthetic logo.
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Emily T Griffiths @emilytgriffiths.com · 18/11/2025
#Voted in #Denmark today, as i have been here for over 4 years! The ballots are as long as CVS receipts.
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Cara A Gallagher @caragallagher.bsky.social · 12/11/2025
Postdoc position(s) available! Work on: - Muskox movement ecology - Ecosystem & carbon dynamics These can be done back-to-back for someone keen on both topics or split into two separate roles. 📄 Full details in the attached flyer! #AcademicJobs #PostdocPositions #Ecophysiology #EcologyJobs
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Emily T Griffiths @emilytgriffiths.com · 08/11/2025
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...
Graphical abstract for the paper 'A simple categorization method for frequency notched echolocation.'  Here, we describe how from four passive acoustic monitoring stations in Skagerrak, echolocation clicks from white-beaked dolphins were manually audited. These signals exhibit distinct spectral peaks and notches between 20-80 kHz in 75-90% of visually confirmed species recordings.

A nonlinear least squares model was used to dynamically map the spectral banding pattern.

Our template was significantly correlated with 87% audited white-beaked dolphin events, making this a viable, computationally efficient method.
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Emily T Griffiths @emilytgriffiths.com · 07/11/2025
And, last talk of the day, Ellen Jacobs talks @dtobioflow.bsky.social and how we are working to harmonize #PAM #harborporpoise detections across Europe. @mialybkaer.bsky.social
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Emily T Griffiths @emilytgriffiths.com · 07/11/2025
New post-doc Xavier Raick gave an overview of his work with year-round #minkewhale residents in warmer climates.
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Emily T Griffiths @emilytgriffiths.com · 07/11/2025
Section Leader @signesveegaard.bsky.social summarizes 12 years of porpoise #PAM results, highlighting the importance of conducting a #poweranalysis to understand the meaning of your results.
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Emily T Griffiths @emilytgriffiths.com · 07/11/2025
Sorting #otoliths is hard work! But Lousie Mau dedicatedly takes on the task to report on what dolphins are eating in East #Greenland.
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Emily T Griffiths @emilytgriffiths.com · 07/11/2025
Rikke Guldborg Hansen discussed her #tagging results on the declining #ringedseal population within their ice habitat.
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Emily T Griffiths @emilytgriffiths.com · 07/11/2025
Yours truly presented the response of #spermwhales when being harassed by #Orcas off Andrea, Norway.
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Emily T Griffiths @emilytgriffiths.com · 07/11/2025
Anders Galatius discusses the potential evolutionary reason for the slight #sexualdimorphism found in #white-beakeddolphins.
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Emily T Griffiths @emilytgriffiths.com · 07/11/2025
Next we have Line A Kyhn, former lab member, presenting results from our joint #USBL study, technology which needs more regulation as their presence dramatically reduces how much time porpoises spend in their habitat.
Line Kyhn presenting how the number of detection positive minutes decreases in the presence of USBL signals.
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Emily T Griffiths @emilytgriffiths.com · 07/11/2025
First up we have Prof. @jonasteilmann.bsky.social giving an overview of the hight ambitious North Atlantic #minkewhale #tagging project.
Professor Jonas Tielmann presenting the paths six minke whales took after being tagged in Scandinavia.
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Emily T Griffiths @emilytgriffiths.com · 07/11/2025
Live from the Danish Marine Mammal Symposium! Here I'll be posting talks given by @marinemammalsau.bsky.social scientists! Stay tuned 🐋🐬🦭🌊🚢🔊
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Emily T Griffiths @emilytgriffiths.com · 07/08/2025
'Reducing our dependence on whales as an energy source will send us sliding down the slippery, spermaceti-lubricated slope to socialism.'
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Emily T Griffiths @emilytgriffiths.com · 06/08/2025
This results in three sperm whales forming a defensive position against the harassing orcas. This audio, detailed in our paper, has also been made publicly available for potential use in other studies. This work was spearheaded by Mel Cosentino. onlinelibrary.wiley.com/doi/10.1111/...
onlinelibrary.wiley.com
Skittish Males in High Latitudes: Complex Social and Acoustic Response of Adult Male Sperm Whales When Harassed by Orcas
Click on the article title to read more.
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Emily T Griffiths @emilytgriffiths.com · 06/08/2025
New paper! Here we report four opportunistic observations of orcas harassing adult male sperm whales near Andenes, Norway. In one instance of recorded audio one sperm whale, using a series of clangs and codas, appears to call to other sperm whales nearby when approached by a group of orcas. See 🖼️⤵️.
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David Ho @davidho.bsky.social · 30/07/2025
Motherfucking wind farms…
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Marine Mammal Research at Aarhus University, Ecoscience @marinemammalsau.bsky.social · 06/07/2025
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
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Marine Mammal Research at Aarhus University, Ecoscience @marinemammalsau.bsky.social · 30/06/2025
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
Our Senior Researcher Fredrik Christiansen completed the third photogrammetry field season on bowhead whales in Disko Bay, Greenland. Together with MSc student Oliver Nowak and local hunters, he measured over 500 whales during March to June to investigate their prey consumption and condition.
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Emily T Griffiths @emilytgriffiths.com · 26/06/2025
This work has been done in #Denmark with many folks at @marinemammalsau.bsky.social and NIRAS. Tusind Tak to the Danish Environmental Protection Agency and the Aage V. Jensen Naturfond for supporting research on the critically endangered Baltic harbour porpoise!
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Emily T Griffiths @emilytgriffiths.com · 26/06/2025
In the video we are using a crane to lift the array lander overboard, while our crane operator, the trustworthy deck boss Artur, monitors an underwater camera to make sure the lander settles correctly on the seafloor. Then Line Kyhn takes a GPS point to mark the position.
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Emily T Griffiths @emilytgriffiths.com · 26/06/2025
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.
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Dr. Carly Kenkel @drcarl.bsky.social · 15/05/2025
Its that time again - the list of Ecology/Evolution/Marine Bio Labs recruiting grad students for Fall 2026 is live! PIs enter your position info here: forms.gle/2XTHBP6CZGEn... Prospective students (and PIs not recruiting) share the composite list: docs.google.com/spreadsheets... Please share! 🧪
forms.gle
Ecology/Evolution/Marine Biology labs recruiting for Fall 2026
Please complete this form if you are a PI recruiting graduate students for a Fall 2026 start. If you are NOT recruiting, feel free to share the response sheet with prospective students looking for lab...
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Emily T Griffiths @emilytgriffiths.com · 23/06/2025
Bonfires are pretty, but I consider myself lucky to round out midsommer off the coast of Møns Klint.
Photo from sea looking at Møns Klint (Danish chalk cliffs) at sunset.
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Emily T Griffiths @emilytgriffiths.com · 11/06/2025
Last week, @mialybkaer.bsky.social, Ellen Jacobs, and I traveled to @vliz.be as part of the @dtobioflow.bsky.social project! We got into the nitty gritty to bring #porpoise pod 🔊 data to the #DataLake via @aquatictracking.bsky.social. Very excited to make this #bigdata 🔢📈 project a reality.
Researchers from the Marine Mammal Research division at Aarhus University and the European Tracking Network group at the Flanders Marine Institute met in Begium at VLIZ to discussion our big data goals. Image is of 9 researchers standing outside in the wind in front of a building.
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Emily T Griffiths @emilytgriffiths.com · 04/06/2025
Often in first drafts I confuse my homophones and realize in the read-through I've used the wrong word. For example, here, I was trying to type pull the line taut, not taught. However, what is with this grammar suggestion? What does 'train to the train' mean? How does it come from 'line taught?'
Small screenshot of Microsoft Word grammar suggestion of 'Pull the line taught' to 'train to the train.'
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Emily T Griffiths @emilytgriffiths.com · 23/05/2025
Terrific work spearheaded by Mark Mikaelsen and Line Kyhn at NIRAS, with co-authors Sidsel Marie Nørholm (NIRAS), and at @marinemammalsau.bsky.social Signe Sveegaard, myself, and @beestfloris.bsky.social. Funding for this study was provided by #Energinet. Full report can be found here⤵️. 🧵6/fin
dce.au.dk
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Emily T Griffiths @emilytgriffiths.com · 23/05/2025
It clear that more focus on the use and impact of USBL systems is needed, especially to keep the source level 🔊 as low as possible. Taken measures could be: - maximum USBL source levels as a technical criteria 🚫 - requirements to avoid unexpected and undocumented in source level variations. 📝 🧵5/6
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Emily T Griffiths @emilytgriffiths.com · 23/05/2025
Additionally, the amount of time before a porpoise would return to an area was positively correlated 📈 with USBL signals. Meaning, that if USBLs were detected at a station, porpoises would take longer to return after the geophysical survey was complete than if there had been no survey. 🧵4/6
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Emily T Griffiths @emilytgriffiths.com · 23/05/2025
Surprisingly, USBLs were detected at ALL stations (‼️), indicating that USBL signals are far more prevalent than what is currently reported. As for disturbance, the presence of USBLs had a significant negative correlation on the probability of porpoise positive minutes (PPM) detected. 🧵3/6
Bar plot with the results of the Control-Impact analyses on porpoise positive minutes (PPM). Model predicted mean and 95% CI intervals (in black) are provided for control and impact stations contrasting PPM between periods without USBL signals (blue bar), periods with USBL signals from other sources (orange bar) and USBL signals from survey vessels (red bar). The letters below the bars indicate whether the predicted mean between groups is significantly different at a p-value of 0.05. As such, bars with similar letters indicates that the mean PPM between groups do not differ from each other, while bars with different letters indicates that the mean PPM between groups differ from each other.

At the control stations, there is a significant difference between porpoise presence during unknown USBL activity (other sources) and without. At the impact stations, there is a significant difference between porpoise presence during known and unknown USBL activity, and without.
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Emily T Griffiths @emilytgriffiths.com · 23/05/2025
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
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Emily T Griffiths @emilytgriffiths.com · 23/05/2025
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
Harbour porpoise surfacing in calm, northern water.
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Emily T Griffiths @emilytgriffiths.com · 22/05/2025
Interesting that you've chosen to block a leading expert on sperm whale communication in this thread. Ideas like this can be harmful, as they shape the narrative in a human centric way. Whale culture and communication will not necessarily mirror our own. Think bigger.
theconversation.com
Are we really about to talk to whales?
It’s certainly an exciting time to study communication in whales and dolphins.
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Emily T Griffiths @emilytgriffiths.com · 22/05/2025
It is very telling when sites leap to block experts that disagree with them!
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Emily T Griffiths @emilytgriffiths.com · 21/05/2025
Very curious to know how this captions the blocked 🚫 content 🤣
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Emily T Griffiths @emilytgriffiths.com · 20/05/2025
Thanks for taking the time to reach out! I had a lot of fun making it. :)
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Luke Rendell @lrendell.bsky.social · 16/05/2025
Inspiring plenary from Joe Roman about 'lifting baselines' and quantifying the effects whale real red ecological pathways have on nutrient cycling and transfer in the oceans - check out his latest contribution here: www.nature.com/articles/s41... #ECSconference2025 🐋🦑🧪
Joe Roman in front of a title slide about to give an inspiring plenary
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Emily T Griffiths @emilytgriffiths.com · 15/05/2025
At #ECSconference2025 @crisbri.bsky.social made a compelling #BlueAnthropocene argument: that animals are living in a world heavily and historically influenced by us. #CulturalEcosystems require historical context.
Slide from a talk giving an overview of different cultures, both historical and modern, influence on wildlife.
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Emily T Griffiths @emilytgriffiths.com · 14/05/2025
But as we see more and more reports of people losing their specialized positions to AI, let's also add to chorus of how AI is still pretty shitty and bad at its job. A knowledgeable stenographer would have been needed to make this work.
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Emily T Griffiths @emilytgriffiths.com · 14/05/2025
I'm not ragging on the organizers. Honestly, they've done an amazing job. This conference is a tight ship. And I can again understand the impulse to try new tech and see if it improves our experience. Especially on what is likely a shoestring budget.
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Emily T Griffiths @emilytgriffiths.com · 14/05/2025
After it confused the sentence 'Conservation is part of our identity' with 'Seduction is part of our identity' someone had the good sense to turn it off.
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Emily T Griffiths @emilytgriffiths.com · 14/05/2025
It also didn't recognize some scientific words, like #cetacean. At the European Cetacean Society conference. Or, my favorite iteration, the #European City Tasting Society.
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Emily T Griffiths @emilytgriffiths.com · 14/05/2025
However, in practice this did not work out. The algorithm simply did not understand Spanish or Portuguese place or people names, and would often insert some laughable US-centric replacement, like Las Vegas University or Cleveland Library.
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Emily T Griffiths @emilytgriffiths.com · 14/05/2025
At the ECS conference, they tried something new: #AIgenerated real-time closed capturing. I completely understand the intention to not only make the conference more accessible, but that many non-native English speakers like to watch TV with English subtitles. It helps them understand.
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Emily T Griffiths @emilytgriffiths.com · 14/05/2025
Thanks to everyone who stopped by my poster! Here is the link to the associated audio: data.mendeley.com/datasets/98j...
data.mendeley.com
Audio of orcas harassing sperm whales in Bleik Canyon, northern Norway, on 23-07-2011
Two-channel wav file recorded on 23-07-2011 aboard the M/S Reine, within 69.34 – 69.47 N and 15.58 – 15.86 E in the Bleik Canyon. The M/S Reine is owned and operated by Whalesafari Andenes, and Whales...
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Emily T Griffiths @emilytgriffiths.com · 10/05/2025
Heading to #ECSconference2025 this weekend in the Azores! Exciting to take part in noise and SAMBAH workshops, and to present this observational report of #orcas harassing #spermwhales in northern latitudes. Paper forthcoming, but for now, stop by and see my poster, I'll tell you all about it!
Poster describing an observational report of orcas harassing sperm whales in northern Norway. Poster breaks down the both the physical and acoustic behavior of the animals.
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Emily T Griffiths @emilytgriffiths.com · 28/04/2025
Who's going to #ECSconference2025, y'all?
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Emily T Griffiths @emilytgriffiths.com · 11/04/2025
This, but also 'ages 15 and older' is terrifying.
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