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14 Cards in this Set
- Front
- Back
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What are some seasonal problems? |
Spring (high rainfall destroys levees, temperatures swings) Summer (Maximum growth=low D.Os) Fall (Cold snaps can depress Nitrosomas and Nitrobacter) Winter (Warm temps may initiate food response, but there is no food.) |
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What are some zoo plankton basics? |
zoo-plankton should correspond to size of larvae Carnivorous fish need zoo-plankton |
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What is the order of size and appearance in a pond? |
Bacteria>Yeast>Fungi>Phytoplankton>Protozoans>Rotifers>Copepods Larvae>Copepods Adults>Insect Larvae |
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What do bacteria produce in the pond? |
Larger ogranisms |
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What is important about rotifers? |
They are eaten directly by fish larvae |
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At 72 degrees Celsius how long does it take rotifers and copeppods to peak? |
Rotifers- 5 to 6 Copepods 10 to 12 |
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What can happen if ponds are filled to early? |
The peak in abundance of desirable zoo-plankton is often missed and results in starvation of larvae fish. |
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What bloom gives a brownish tint to the water? |
Zoo-plankton |
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What bloom gives a greenish tint to the water? |
Phytoplankton |
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What is associated with high nutrients, poor quality water, and can generate lethal levels of toxins and substances that cause off flavor? |
Blue-green algae |
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What does density and timing of blooms depend on? |
Temperature, sunlight, fertility, and sources of plankton |
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What impact you when trying to create a bloom? |
suspended clay, excessive runoff, lack of nitrogen in new ponds, binding of nutrients to pond sediments in older ponds. |
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What are the two basics types of fertilizer? |
organic and inorganic |
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How are bloom densities measured? |
Secchi disk, if you cant see the disc at 9 inches then quit fertilizing |
