Sperm whales in the twilight zone?
what are 5 good facts about sperm whales entering the twilight zone and there diets
- 1 decade agoFavorite Answer
1. Shut down not essential body functions to maximize oxygen levels for up to an hour and reduce buoyancy to increase depth.
2. Use other senses besides vision to find their prey, squid, because it gets very dark that deep underwater. One of those senses could be a series of clicks for echolocation.
3. Perhaps try to commit the exact location to memory if the dive is successful for a return trip to an areas rich in squid.
4. Avoid any dangers such as another sperm whale that wants to dive and capture the same prey that the one whale wants, or any great white sharks or killer whales that may attack an infant sperm whale far above the mother, too small to dive along with her. Vigilance. Stay alert to dangers.
5. Perhaps use some sort of detection of earth magnetic fields, some scientists speculate, or something comparable to that, to basically deduce the presence of prey down there to be likely. Maybe geothermal vents, an underwater oasis teeming with life. There should be food for the squid there which by simple deduction indicates a likely presence of squid. Squid food=squid.
- Elizabeth HLv 71 decade ago
She continues her journey downward, still going straight down. Now it is pitch black. No light, except possibly the bioluminescent glow of some of the deep sea creatures down here. How does she know which way is up? Echolocation? Or perhaps an unerring sense of gravity we don't have? Humans (and tortoises) would be hopelessly disorientated and confused.
After five and a half minutes the whale reaches five hundred meters (1640 feet). Humans can live and work down here but it takes days of compression to get there and days of decompression to get back. It also requires a mixture of special gasses. The sperm whale does it over and over again several times a day. The pressure is now over 700 psi (48 atmospheres).
After eleven minutes of steady swimming straight down, mostly in complete utter blackness, our whale reaches her happy hunting grounds. Now she is about 1000 meters (3280 feet or 3/5 of a mile) below the surface. Eleven football field lengths of water is above us. The pressure is 1421 pounds per square inch (almost 100 atmospheres). 200,000 pounds (100 tons) of water press on every square foot of the whale. All the time, day and night, winter and summer, the water temperature is 2 degrees celsius (36 degrees Farenheit).
This is the typical hunting depth for a sperm whale. Somewhere between 500 and 1000 meters. For the next 20 to 40 minutes our whale will stay down here in the dark and cold, hunting and eating. There are many unanswered mysteries about what goes on down here, but alas, we must save them for another article.
At this depth the air in the whale's body is one percent of its original volume, and it is 100 times more dense.
After spending 20 or 30 minutes catching and somehow swallowing a lot of fish and squid, our whale, still holding her breath, heads back for the surface.Source(s): www.ftexploring.com/askdrg/askdrgalapagos2.html
- 4 years ago
I don't believe there is much difference in levels. The locks in the Panama Canal are to compensate for the difference in water level between the ocean and the waterway of the canal, not the difference between the two oceans. The Suez canal has no locks between the Mediterranean and Red Seas