Chapter 6 Marine Vertebrates Vertebrate features, Marine Fishes and Tetrapods.
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Transcript of Chapter 6 Marine Vertebrates Vertebrate features, Marine Fishes and Tetrapods.
Chapter 6 Marine Vertebrates
Vertebrate features, Marine Fishes and Tetrapods
Vertebrate FeaturesVertebrate Features
All living vertebrates share similar structural features:– Bilateral symmetry– A postanal tail– An anterior brain– Specialized sense organs– Centrally located vertebral skeleton for
support
FishesFishes There are more species of fishes than all other
vertebrate groups combined, and a majority of these are marine.
Classes include:– Agnatha (cyclostomata) a primitive fish lacking
paired fins and true jaws. Rep: lampreys and hagfishes
– Chondrichthyes include sharks, rays and skates. They exhibit true jaws, paired fins, and scales but a cartilagenous skeleton.
– Osteichthyes are the bony fish and have true jaws, paired fins, scales and a bony skeleton
Agnatha (Cyclostomata): Agnatha (Cyclostomata): lampreylamprey
Agnatha: HagfishAgnatha: Hagfish
Chondrichthyes: SharkChondrichthyes: Shark
Shark egg casesShark egg cases
Whale shark egg foundWhale shark egg found
Great White SharkGreat White Shark
Bull sharkBull shark
Whale sharkWhale shark
Chondrichthyes: Sting rayChondrichthyes: Sting ray
Chondrichthyes: skateChondrichthyes: skate
Skates lay eggsSkates lay eggs
Male and female chondrichthyesMale and female chondrichthyes
Osteichthyes: bony fishesOsteichthyes: bony fishes
TetrapodsTetrapods Three classes of air-breathing marine
tetrapods – Reptilia, Aves, Mammalia Sea snakes, turtles, the marine iguana,
marine crocodiles, and a large number of birds and mammals forage the sea.
Reptiles and birds share several adaptations, including nasal salt glands and uric acid excretion.
Marine mammals include two groups, the cetaceans (whales, porpoises, dolphins) and the pinnipeds (seals, sea lions, and walruses) as well as sea otters, manatees, and dugongs.
Marine Amphibians: Marine Amphibians: Crab-eating frogCrab-eating frog
Amphibians on the whole are intolerant of saline conditions, but the Crab-eating frog is among the very few exceptions. It is found in the brackish-water of mangrove streams and also in adjacent damp, grassy areas.
Marine ReptilesMarine Reptiles
What can you do to help?What can you do to help?
Marine ReptilesMarine Reptiles
Marine ReptilesMarine Reptiles
Marine Reptiles: Sea snakesMarine Reptiles: Sea snakes
Marine AvesMarine Aves
Marine AvesMarine Aves
Marine AvesMarine Aves
Marine AvesMarine Aves
Marine AvesMarine Aves
Marine AvesMarine Aves
Marine AvesMarine Aves
Marine MammalsMarine Mammals
Marine MammalsMarine Mammals
Marine Mammals, Marine Mammals, Order PinnepediaOrder Pinnepedia
Plastic pollution and the sealPlastic pollution and the seal
Killer whaleKiller whale
Sea LionSea Lion
Marine MammalsMarine Mammals
Marine MammalsMarine Mammals Order Carnivora, the polar bears
Marine Mammals: Marine Mammals: Order Sirenia the manatees & dugongs
Marine Mammals: Marine Mammals: bottlenose bottlenose dolphindolphin
Marine MammalsMarine Mammals
What is the Difference Between What is the Difference Between a Dolphin and a Porpoise?a Dolphin and a Porpoise?
Dolphins and porpoises are so similar that it is easy to confuse which is which.
In general, porpoises are smaller and plumper than dolphins, rarely reaching lengths of more than 6 feet and weights of more than 300 pounds. They have a rounded head and a small, triangular dorsal fin. Porpoises lack the "beak" characteristic of most dolphins, having a blunt snout instead.