Sharks The Animal Answer Guide
20 Sharks: The Animal Answer Guide deposits 100 to 2.5 million years old (Late Cretaceous through the Tertiary period). Embedded ...
Introducing Sharks, Skates, Rays, and Chimaeras 21 Why are sharks important? Sharks are important because of the roles they play ...
22 Sharks: The Animal Answer Guide natural areas and learning about them in a nondestructive, nonconsum- ing manner, is a modern ...
23 What is the metabolism of a shark? Sharks live in the slow lane. They have what we consider to be very slow metabolisms and a ...
24 Sharks: The Animal Answer Guide Are sharks cold-blooded or warm-blooded? The great majority of sharks, rays, and chimaeras ar ...
Form and Function of Sharks 25 ment needed to chase down and feed on fast-swimming, warm-blooded prey such as seals, sea lions, ...
Mako sharks are fish-eating special- ists, able to chase down and grab such elusive prey as tunas. The teeth in both jaws of thi ...
Form and Function of Sharks 27 usual teeth. In some squaloid sharks, such as the 40-cm-long (15.7-in) Cookiecutter Shark, Isisti ...
28 Sharks: The Animal Answer Guide Horn Sharks (Heterodontus—literally, “different teeth”) get their scien- tific name from the ...
Form and Function of Sharks 29 mostly zooplankton, which they strain from the water with their gill rakers as water passes from ...
30 Sharks: The Animal Answer Guide functional, although this number can range as high as eight. The number of tooth rows differs ...
Form and Function of Sharks 31 mals when it grows to over 3 m in length. Fish-eating sharks (makos, Sand Tigers) often have long ...
32 Sharks: The Animal Answer Guide in the uterus (see “Do sharks lay eggs or do they give birth to live young?” in chapter 6). S ...
Form and Function of Sharks 33 How good is a shark’s sense of smell? Elasmobranchs have exceedingly acute olfactory (smelling) c ...
34 Sharks: The Animal Answer Guide “chumming,” which involves mashing fish parts with beef blood in a bucket of sea water and la ...
Form and Function of Sharks 35 put a shark’s nose in contact with any floating, odor-releasing compound at the water’s surface, ...
36 Sharks: The Animal Answer Guide ers know from trying to locate a buddy who is banging on a scuba tank to alert other divers ( ...
Form and Function of Sharks 37 eyeball backward when attacking active prey. This moves the more delicate parts of the eye out of ...
38 Sharks: The Animal Answer Guide trast. Shark coloration—or rather, the lack of it beyond bold darks and lights—supports this ...
Form and Function of Sharks 39 smell, appearance, or sounds. This has been demonstrated in the field and laboratory with sharks ...
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