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What is killing whale calves in Patagonia? bacteria under suspicion

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Cite

Thykjaer, C. (2026, September 25). What is killing whale calves in Patagonia? bacteria under suspicion. Euronews. https://www.euronews.com/2026/09/25/what-is-killing-whale-calves-in-patagonia-bacteria-under-suspicion

Dated when The Aporia collected the article, usually within hours of publication. Check the original for its exact date and byline.

Euronews · collected 2026-09-25 · by Christina Thykjaer

Quick Summary

Scientists are investigating an unusually high number of deaths among southern right whale calves in Argentina’s Patagonian coast, with hundreds of calf deaths recorded since June. Researchers suspect bacteria, particularly erysipelas, might be responsible, though the investigation is still ongoing to confirm this hypothesis. Veterinarians and authorities are working together to determine the cause, while noting that human activity could potentially play a role despite natural causes being favored for now.
Written by AI on 2026-09-26, from this article's own text only (the story summary below draws on all the coverage).

AI analysis

Story summary

Dozens of southern right whale calves have been found dead on beaches along the Patagonian coast of Argentina, particularly in the province of Chubut, since June. Scientists from the Marine Mammals Laboratory at Conicet suspect an unusually high mortality rate this season may be due to a bacterial infection, specifically erysipelas, which is often present on the skin of these whales but can become deadly under certain conditions. Mariano Coscarella of Conicet confirmed that the death toll among calves has been exceptionally high recently, raising concerns among researchers and local authorities about potential environmental factors contributing to this bacterial outbreak.

Written for “Whale Calves Die Off Patagonia” on 2026-11-03, grounded in this article and the 0 other(s) covering the same event.

Story

📰 Whale Calves Die Off Patagonia
Environment · 1 article(s) covering the same event.

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How this article was measured signals, leaning charts, publisher record, byline, topics and claims

Signals How these are calculated →

Claims extracted
18
sentences that state something as happening or true
Uncertain
11%
2 of 18 hedged ("reportedly", "may", "according to")
Leaning
not political
takes no side on a contested political question
Publisher signals
60/100
Euronews's corrections and hedging, across everything collected from it. Not a measure of accuracy.
Outlets on this story
1
Environment
Same framing elsewhere
1
articles that frame the event the way this one does
Analyzed 2026-09-26 · how these are computed

How this is being covered How these are calculated →

Article leaning vs. publisher reliability
Source leaning vs. consistency

Publisher

Euronews · 1162 article(s) · 1 correction(s) detected
Running correction rate · 1 correction(s)

Who wrote this

Christina Thykjaer
6 article(s) here · 1 carrying a prediction
🔮 By late Monday, the hurricane was producing sustained winds of up to 155 kilometres per hour and is expected to maintain its strength for much of the week, according to the US National Hurricane Center, which has warned of potentially life-threatening flooding and landslides before a possible landfall on Friday.
🔮 Bacteria among the main hypotheses Veterinarians are now investigating whether erysipelas, an infectious disease caused by bacteria that are often present on the skin of these mammals, could be behind the deaths.
🔮 For the moment, there is no indication that any unit has been ordered to deploy, and the document does not specify where the forces would be sent or what kind of operation they would take part in.
🔮 According to Conaf's forecasts, the spectacle will reach its peak in October.
🔮 According to Conaf forecasts, the phenomenon will reach its peak splendour in October.
Also by Christina Thykjaer
Nothing else under this byline is closely related to this article, so these are simply their most recent.
All 6 articles by Christina Thykjaer →

Topics

Argentina Argentine Chubut Patagonia Patagonian

Subjects

Argentina GPE · 2× Chubut GPE · 2× Coscarella PERSON · 2× Argentine NORP · 1× Conicet ORG · 1× Mariano Coscarella PERSON · 1× Patagonia GPE · 1× Patagonian NORP · 1× the Marine Mammals Laboratory ORG · 1× the National Scientific and Technical Research Council ORG · 1×

Narrative

"The mortality rate among calves is quite high, especially this season," explained Mariano Coscarella, a researcher at the Marine Mammals Laboratory of the National Scientific and Technical Research Council (Conicet), speaking to AFP.
framing: assertive · carried by 1 article(s) · first seen 2026-09-26
🔮 Bacteria among the main hypotheses Veterinarians are now investigating whether erysipelas, an infectious disease caused by bacteria that are often present on the skin of these mammals, could be behind the deaths.
2026-09-26 · Euronews
What is killing whale calves in Patagonia? bacteria under suspicion · assertive framing

Claims (18 extracted, 2 hedged)

Dozens of southern right whale calves have been found dead on Argentina's Patagonian coast. asserted
Dozens → find → coast
Scientists are probing a possible bacterial infection after an unusually deadly season. asserted
Scientists → probe → season
Hundreds of southern right whale calves have died in recent months in Argentine Patagonia, in an episode that has put scientists and authorities on alert. asserted
that → die → alert
Initial investigations point to a bacterial infection as a possible cause of an exceptionally high mortality rate this season. asserted
investigations → point → rate
Just this week, dozens of dead whale calves have appeared on beaches in the province of Chubut, in southern Argentina. asserted
dozens → appear → Argentina
Cases have been recorded since June, affecting one of this species' main breeding grounds in the South Atlantic. asserted
Cases → record → Atlantic
"The mortality rate among calves is quite high, especially this season," explained Mariano Coscarella, a researcher at the Marine Mammals Laboratory of the National Scientific and Technical Research Council (Conicet), speaking to AFP. asserted
Coscarella → explain → AFP
Bacteria among the main hypotheses Veterinarians are now investigating whether erysipelas, an infectious disease caused by bacteria that are often present on the skin of these mammals, could be behind the deaths. uncertain
that → investigate → deaths
Authorities in Chubut have indicated that initial analyses point specifically to a common marine bacterium, although the investigation remains open to establish with certainty what is causing the fatalities. asserted
what → indicate → fatalities
Coscarella believes that for the moment the evidence points to a natural cause, but warns that a possible influence of human activity still cannot be completely ruled out. asserted
influence → believe → activity
The provincial government says it is working together with the scientific community to determine the origin of the episode. asserted
it → say → episode
One of the southern right whale's main calving grounds Puerto Madryn and the nearby Valdés Peninsula form one of the major breeding refuges for the southern right whale. asserted
Madryn → form → whale
Every year, large numbers of whales arrive in these waters to mate and raise their young. asserted
numbers → arrive → young
These cetaceans can reach around 17 metres in length and weigh about 40 tonnes as adults. asserted
cetaceans → reach → adults
In 2025, a record 2,110 whales were counted in the area, around 800 of them juveniles. asserted
800 → count → them
This year, the tally stands at 1,375 animals, including nearly 400 calves, according to data provided by Coscarella. uncertain
tally → stand → Coscarella
Despite the high number of deaths recorded this season, the researcher notes that the episode does not, for now, pose a medium-term threat to the region's whale population. asserted
episode → record → population
Local authorities estimate that a southern right whale can live for around 60 years. asserted
whale → estimate → years
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