How sharks have evoloved in Brazil

  • Leader
    April 13, 2024 9:49 AM PDT
    Interesting article about how by excavating large deposits of a bay area could bring to light the difference in shark teeth from then to know, which reflects their health and eating habits.

    [url=https://www.smithsonianmag.com/science-nature/what-centuries-old-shark-teeth-reveal-about-brazils-ocean-180983856/?utm_source=pocket-newtab-en-us]https://www.smithsonianmag.com/science-nature/what-centuries-old-shark-teeth-reveal-about-brazils-ocean-180983856/?utm_source=pocket-newtab-en-us


    Like human teeth, shark chompers contain collagen, a type of protein
    that includes different elements, such as nitrogen and carbon, that
    animals get from their food. Although scientists can’t tell exactly what
    an animal has eaten from analyzing its teeth, Burg Mayer’s team was
    able to glean clues about the sharks’ diets and rankings as predators by
    comparing different forms of nitrogen, called isotopes, between the two
    dental sets. Higher nitrogen isotope values suggest that an animal is
    feeding higher on the food chain—that is, more likely to be eating
    carnivorous or herbivorous prey than plants.