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f99u2le1 - FISH ECOLOGY Unit 2. Fish Ecology Lesson 1....

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©PROJECT OCEANOGRAPHY FALL 1999 FISH ECOLOGY 17 F ISH E COLOGY Unit 2. Fish Ecology Lesson 1. --What is a Fish? Lesson objectives: ± Students will understand external fish anatomy, and that fish come in many shapes and sizes ± The students will be able to identify the different zones of the ocean ± Students will become familiar with the methods that are used to study fish are diverse, and each has a purpose. Vocabulary words: vertebrae, planktonic, nektonic, benthic, continental margin, and many more pertaining to ocean zonation What is a Fish? A fish is defined as an aquatic or marine animal with vertebrae . All fish have vertebra, except sharks and rays that have cartilage. Cartilage is more flexible than bone, but strong enough to support the body. They usually possess gills in the adult stage and have limbs in the form of fins. Fishes also include the jawless vertebrates such as the lamprey and hagfish; and the shark, ray, chimaera, lungfish, and bony fishes. The bony fishes are the most common. A bony fish has jaws that are well developed, formed by true bone rather than cartilage. Fish are very different in appearance, size and shape. This all depends on the environment that it lives in.
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©PROJECT OCEANOGRAPHY FALL 1999 FISH ECOLOGY 18 F ISH E COLOGY Some fish live in man made habitats in peoples homes. These habitats are called aquaria. Fish Habitats Fish occupy almost every conceivable aquatic habitat. Describing the ocean is difficult, as there are many words that are used to explain the land and water realms. These habitats are defined by the critters that live in each. Visualize a column of water. This is the pelagic (the water, not associated with land) realm of the ocean. Geographic zonation defines the coastline, and submerged land. Scientists use these words to help in the identification of animals that live on the substrate (land). There are other terms that describe the geographic zones that pertain to the continent and landmasses under the water. Between the continental land and seafloor is the continental margin . It is the submerged part of the continent, and makes up a transition zone between the continents and ocean basins. The continental margin includes the coast (also known as the littoral zone ), the continental shelf , the continental slope , and the continental rise . The continental rise ends where the abyssal plain begins. The deepest parts of the ocean are located in the trenches , or hadal areas. (Activity 1 is an illustration that is to be labeled with the different vocabulary words found in this section.)
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©PROJECT OCEANOGRAPHY FALL 1999 FISH ECOLOGY 19 F ISH E COLOGY Prefix (most have Greek origins) English definition Realm (water or land) Depth Example of what lives there pelag(os) of the sea water no specific depth, just pertaining to the water realm, NOT the land all organisms
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f99u2le1 - FISH ECOLOGY Unit 2. Fish Ecology Lesson 1....

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