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Fredrik Christiansen

As seen in: Wiley Online Library, Yahoo News Australia, MDPI, The Conversation, Flipboard, Phys.org, New Atlas, Silicon Republic, Australian Geographic, Newswise and
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Articles

A Computer Vision Framework for Estimating Body Size and Condition in Multiple Cetacean Species

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By Fredrik Christiansen, Chhandak Bagchi, Janet Reshma Jeyasingh
| Wiley Online Library Verified
Conflicts of Interest The authors declare no conflicts of interest. Data Availability Statement The data that support the findings of this study are available on request from the corresponding author. The data are not publicly available due to privacy or ethical restrictions. References , , and . 1983. “Fertility and Body Weight in Female Red Deer: A Density-Dependent Relationship.” Journal of Animal Ecology 52: 969–980. https://doi.org/10.2307/4467. , , , and . 2023.
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These whale mothers float upside-down for a very good reason

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By Fredrik Christiansen
| Gear Open
Kate Sprogis, Fredrik Christiansen & Renae van Noort, The University of Western Australia/Aarhus University/The Conversation If you stand on one of Australia’s southern shorelines at this time of the year, you might be lucky enough to spot a southern right whale (Eubalaena australis) swimming in the shallow waters. These ocean giants have migrated from the Southern Ocean and Antarctica to breed, give birth and to rest. If you’re really lucky, you may even see one of them resting upside-down.
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Upside‑down whales aren't sick or hurt—they're just resting

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By Kate Sprogis, Fredrik Christiansen, Renae van Noort
| Phys.org Verified
Southern right whale mother resting at the surface upside-down. Credit: Fredrik Christiansen/Aarhus University. If you stand on one of Australia's southern shorelines at this time of year, you might be lucky enough to spot a southern right whale (Eubalaena australis) swimming in the shallow waters. These ocean giants have migrated from the Southern Ocean and Antarctica to breed, give birth and rest. If you're really lucky, you may even see one of them resting upside down.
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