Observers on a NOAA Fisheries marine mammal survey watched as a pod of killer whales killed a marine animal, leaving only its lungs and heart behind. Now, scientists have learned exactly what the whales killed and then ate with DNA evidence.
It turns out that even though dolphins and seals are made for deep dives, exercising while holding their breath still remains a physiological challenge for marine mammals.
Scientists have found that marine mammals likely hear sonar signals far more often than thought, since commercially available sonar systems emit signals known to be within their hearing range.
Climate change may be impacting Arctic marine mammals. There's been an emergence of the disease Sarcocystis pinnipedi due to changing temperatures.
Monitoring marine mammal biodiversity is often difficult. Now, though, scientists have found a way that could help monitor marine mammal genetic diversity. They've evaluated the usefulness of DNA barcoding when it comes to monitoring this biodiversity.