[As part of the Science study, the researchers sought to understand why the salmon shark's heart continues to function when it is ice cold.] The shark heart slows down in the cold, just as our own heart would, ... But what sets it apart is where our heart would simply stop, the salmon shark keeps on ticking. |
[As part of the Science study, the researchers sought to understand why the salmon shark's heart continues to function when it is ice cold.] The shark heart slows down in the cold, just as our own heart would, ... But what sets it apart is where our heart would simply stop, the salmon shark keeps on ticking. |
I like to check on the position of the sharks with my coffee every morning, |
I like to check on the position of the sharks with my coffee every morning. |
Sharks are declining globally, yet the movements and habitats of most species are unknown. |
Sharks are declining globally, yet the movements and habitats of most species are unknown, |
Sharks are some of the least understood predators on the planet. ... We can go to the moon and plan a trip to Mars, but we're barely starting a mission in the Pacific Ocean. |
Sharks have home ranges that are at the scale of ocean basins. |
Sometimes in winter the surface waters, which are less salty, were so cold that the sharks spent more time in warmer, saltier waters below. When I glimpsed the sharks' radio positions from these frigid seas, I often wondered what it would be like to overwinter in the wilds of an Alaska fjord chasing herring in constant darkness. |
Sometimes in winter the surface waters, which are less salty, were so cold that the sharks spent more time in warmer, saltier waters below, ... When I glimpsed the sharks' radio positions from these frigid seas, I often wondered what it would be like to overwinter in the wilds of an Alaska fjord chasing herring in constant darkness. |
The shark heart slows down in the cold, just as our own heart would, ... But ... where our heart would simply stop, the salmon shark's keeps on ticking. |
The shark heart slows down in the cold, just as our own heart would. But what sets it apart is where our heart would simply stop, the salmon shark keeps on ticking. |
These animals are teaching us... about basic aspects of our own physiology. |
They're capable of keeping their hearts beating at temperatures that would have long stopped a mammal's heart. |
This is clearly a unique shark species--the warmest of all gill-breathers in the ocean, |