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UrduOne of the biggest crises in Earth history was marked by a revolution in the shellfish – brachiopods, sometimes called ‘lamp shells’ were replaced everywhere ecologically by the bivalves, such as oysters and clams. This happened as a result of the devastating end-Permian mass extinction which reset the evolution of life 250 million years ago.
Tag: Bivalves
DNA Decodes the Dining Preferences of the Shell-Shucking Whitespotted Eagle Ray
With mighty jaws and plate-like teeth, the globally endangered whitespotted eagle ray can pretty much crunch on anything. Yet, little information is available on critical components of their life history in the U.S., such as their diet.
Crunch! Underwater Acoustics Expose ‘Shell-crushing’ Sounds in a Large Marine Predator
“Shell-crushing,” an explosive sound, occurs when marine animals crack open hard shells like clams to eat the edible tissue. There hasn’t been any data to support this feeding noise, until now. A study is the first to quantify these sounds using underwater acoustics in a marine animal in a controlled setting. Scientists know what type of shell a ray is eating based on the sound it makes and show it’s audible above ambient noise in lagoons out to 100 meters.