Fish Anatomy - PowerPoint by H574TLB

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									            Fish Anatomy




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            External




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            Internal




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    SPINE:
    Made up of numerous hollow vertebrae that
    protect the spinal cord.
    SPINAL CORD:
    Connects brain to the rest of the body and relays
    information from the body to the brain and vice
    versa
    BRAIN:
    where both automatic functions (such as
    respiration) and higher behaviors ("Should I eat
    that critter with the spinning blades?") occur.

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            Internal




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    LATERAL LINE:
    1 of the primary sense organs; detects underwater
    vibrations and determines the direction of them
    SWIM (or AIR) BLADDER:
    A hollow, gas-filled balance organ that allows a fish to
    conserve energy by maintaining neutral buoyancy
    (suspending) in water
    GILLS:
    Allow a fish to breathe underwater


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            Internal




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    KIDNEY:
    Filters liquid waste materials from the blood; also important in
    regulating water and salt concentrations within body, allowing
    certain fish species to exist in freshwater or saltwater or both
    STOMACH AND INTESTINES:
    Digest food and absorb nutrients
    Bass that are piscivorous (eat other fish) have fairly
    short intestines because such food is easy to break
    down and digest.
    Tilapia that are herbivorous (eat plants) require longer
    intestines because plant matter is tough and fibrous and
    more difficult to break down into usable components


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            Internal




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    VENT:
    The site of waste elimination from the fish’s body
    LIVER:
    This important organ has a number of functions. Assists in digestion
    by secreting enzymes that break down fats, and also serves as a
    storage area for fats and carbohydrates
    HEART:
    Circulates blood throughout the body. Oxygen and
    digested nutrients are delivered to the cells organs
    through the blood, and the blood transports waste
    products from the cells to the kidneys and liver for
    elimination


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            Internal




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    GONADS (REPRODUCTIVE ORGANS):
    Bright orange mass of eggs
    The male organs, which produce milt for
    fertilizing the eggs, are much smaller and
    white but found in the same location
    The eggs (or roe) of certain fish are
    considered a delicacy (caviar = sturgeon)


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            Internal




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    MUSCLES:
    Provide movement and locomotion
    This is the part of the fish that is eaten and becomes the
    fillet of the fish




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            Correctly Measuring




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    Catch and Release Chart




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                   Fishing Facts
    Minnesota is first nationally in the sales of fishing
    licenses per capita.
    Fish species: 158
    Fishing waters: 3,800,000 acres
    Fishable lakes: 5,493
    Fishable streams (cold and warm water): 15,000
    miles
    Trout streams: 1,900 miles
    Trout stream improvements: 410 miles
    Trout lakes rehabilitated: 134
    Warm water lakes rehabilitated: 79

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    Average number of fish stocked per year:
    Walleye Fry - 250 million
    Walleye Fingerlings - 2.0 million
    Walleye Yearlings - 54 thousand
    Walleye Adults - 32 thousand
    Northern Pike (fry, fingerlings & adults) - 1.2 million
    Muskellunge (fingerlings) - 32,000
    Tiger Muskellunge (fingerlings) - 2,000
    Largemouth Bass - 7,500 (fingerlings and adults)
    Smallmouth Bass - 30,000 (fingerlings and adults)
    Channel Catfish - 100,000 (fingerlings and yearlings)
    Bluegill - 40,000 adults


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    Fish hatcheries: 5 coldwater ( trout and
    salmon), 12 cool and warm water (walleye,
    muskie, catfish, etc.)
    Walleye rearing ponds used annually
    (on average): 325
    Northern pike spawning areas used
    annually (on average): 10


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                       Harvest
    Sport Fish Harvested:
    Walleye - 35 million pounds
    Northern Pike - 3.2 million pounds
    Panfish - 64 million pounds
    The most caught fish:
        1st: Panfish
        2nd: Walleye
        3rd: Northern
    Sport fishing expenditures in Minnesota: $1.58 billion
    Commercial fish harvested: 4.5 million pounds
    Minnow industry:
    Minnow dealers: 386
    Minnow retailers: 920


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