OCE 3014 Lecture Notes - Lecture 2: Live-Bearing Aquarium Fish, Middle Ear, Hemoglobin
Document Summary
Rigid container such as shells (internal or external) or Float - less dense than saltwater or neutral. Fish - swim by curving body from front to back. Also swim by using fins sea turtles use flippers marine mammals use up/down tail movements. Vertical fins as stabilizers dosral and anal fins. Rounded caudal fins flexible, maneuver at slow speeds. Truncate fins and forked fins, useful for both maneuvering and thrust. Lunate fins rigid, lots of thrust for fast swimmers. Can move very fast for short time (mainly to avoid predation) Mainly fish that consume detritus or each other. Pinnipeds - family odobenidae (walrus), family otariidae (sea lions), family phocidae (seals) Suborder odontoceti (toothed whales - dolphins, orcas, sperm whales) Suborder mysticeti (baleen whales - blue whale, gray whale) Coastal areas of indian and western pacific oceans. Specialized skin (dermal ridges) structure for fast swimming. Range in size from 1. 5 m hector"s dolphin to 9 m killer whales.
