Sharks The Animal Answer Guide
100 Sharks: The Animal Answer Guide gesting avoidance of colder winter conditions. Atlantic Stingrays leave the Chesapeake Bay d ...
Shark Ecology 101 Do sharks have any enemies other than humans? Sharks’ greatest enemies, after humans, are other sharks. Severa ...
102 Sharks: The Animal Answer Guide prevent infection (see “Do sharks socialize with other kinds of animals?” in chapter 4). Tor ...
Shark Ecology 103 whaling records indicate they also eat small deep-sea sharks. Sperm whales were also seen attacking a Megamout ...
104 Sharks: The Animal Answer Guide documented large trevally singly or in pairs repeatedly head-butting reef species such as Bl ...
Shark Ecology 105 shark immediately left the area and went to Hawaii. How other sharks were aware of the attack is something of ...
106 Sharks: The Animal Answer Guide hard thorns. Southern Thorny Skates (Amblyraja doellojuradoi) do this when caught in nets. D ...
Shark Ecology 107 ened; this is why they are known as shysharks or even doughnut sharks. This behavior may make these small (60- ...
108 Sharks: The Animal Answer Guide Do sharks have parasites? We like to think of big sharks as residing at the top of the food ...
Shark Ecology 109 ■ Lateral line—A copepod lives inside the lateral line canals of the Por- beagle. ■ Spiracles—Three families o ...
110 Sharks: The Animal Answer Guide Most internal parasites are small, wormlike animals. But others are large and have backbones ...
Shark Ecology 111 How can you tell if a shark is sick? A healthy shark swims normally. A sick shark would appear disoriented, sw ...
112 How do sharks reproduce? We know a great deal about certain aspects of elasmobranch reproduc- tion. Or at least we know much ...
Reproduction and Development 113 in an umbrella-shaped structure. In smaller, flexible sharks, the male may wrap himself around ...
114 Sharks: The Animal Answer Guide from the male’s teeth, with the result that the fins of many Nurse Shark females bear obviou ...
Reproduction and Development 115 fin against his forehead while he inserts a multi-lobed pelvic fin clasper into the female. We ...
116 Sharks: The Animal Answer Guide Live-bearing sharks and rays fall into one of two groups depending on how the embryo gets it ...
Reproduction and Development 117 to facilitate passage, and the venomous barb is flexible and covered in a sheath that is lost s ...
118 Sharks: The Animal Answer Guide renew the water supply inside the egg, embryonic skates lash their tails back and forth, mov ...
Reproduction and Development 119 months. Elasmobranchs as a group have relatively long gestation periods, an important factor in ...
«
2
3
4
5
6
7
8
9
10
11
»
Free download pdf