Widely set eyes give hammerhead sharks exceptional binocular vision
2009年11月26日 · The hammerhead shark’s distinctive head gives it excellent binocular vision. Even though its eyes are set widely apart, their fields of vision overlap to a greater degree than those of pointy...
Widely set eyes give hammerhead sharks exceptional binocular vision
2009年11月27日 · The winghead shark has a 48 degree arc in front of it that's covered by both eyes, which must give it exceptional depth perception. By comparison, the scalloped hammerhead has a binocular overlap of 34 degrees, the bonnethead has a much smaller one of 13 degrees, and the lemon and blacknose sharks have the smallest of al with 10 and 11 degrees ...
Enhanced visual fields in hammerhead sharks | Journal of …
2009年12月15日 · In this study we tested the ‘enhanced binocular field’ hypothesis (that proposes enhanced frontal binocularity) by comparison of the visual fields of three hammerhead species: the bonnethead shark, Sphyrna tiburo, the scalloped hammerhead shark, Sphyrna lewini, and the winghead shark, Eusphyra blochii, with that of two carcharhinid species ...
Hammerhead Sharks See 360 Degrees in Stereo - Live Science
2009年11月27日 · Scientists have long wondered why the hammerhead shark has such a strangely shaped head, one that looks like two heads of a hammer protruding from the sides of the shark's snout, with an...
In Stereo: Hammerhead Sharks Have Human-Like Vision
2009年12月1日 · Stephen Kajiura, a sensory biologist, suggests that the stereo vision helps the sharks hunt prey like squid that dart around in three dimensions. The wide set eyes also allow the sharks to see through 360 degrees of vision, according to the researchers, who published their findings in TheJournal of Experimental Biology.
HAMMERHEADS' WIDE HEADS GIVE IMPRESSIVE STEREO VIEW
2009年12月15日 · The team tested the field of view in individual shark's eyes by sweeping a weak light in horizontal and vertical arcs around each eye and recorded the eye's electrical activity.
Wide heads give hammerhead sharks exceptional stereo view
2009年11月27日 · Why hammerhead sharks have their distinctively shaped heads has puzzled scientists for generations, but now researchers have discovered that hammerheads' wide heads give them an impressive...
BBC - Earth News - Hammerhead shark mystery solved
2009年11月27日 · The mystery may now be solved by a study showing that a hammerhead gives sharks outstanding binocular vision and an ability to see through 360 degrees. The finding is published in the Journal...
The team tested the field of view in each shark's eyes by sweeping a weak light in horizontal and vertical arcs around each eye and recorded the eye's electrical activity.
Binocular vision: the secret behind hammerhead shark head shape?
2009年12月4日 · Additionally the study identified that hammerhead sharks have an astonishing 360 degree view of their surrounding environment in the vertical plane, seeing all that’s above and below, as well as an excellent stereo rear-view.