Question

1. the yearly catch of fish from natural waters is

a. increasing.
b. holding constant or decreasing.
c. hard to determine.
d. mostly catfish.

1. the highest salinity is measured in

a. pond water.
b. irrigation water.
c. creeks.
d. ocean water.

1. the accumulation of salts in water occurs most often when

a. water runs across agricultural land.
b. water settles in a pond.
c. water collects in a drainage ditch.
d. water is lost through evaporation.

1. brackish water is

a. colored black.
b. located in tidal areas.
c. collected from small creeks and br
c. mostly high in salinity (20 - 34 ppt)

1. water quality is less affected by

a. fish density.
b. weather.
c. chemical runoff.
d. fish species.

1. the greater the density of fish in a system, the

a. smaller the tank.
b. larger the fish.
c. the more difficult the management.
d. the higher the temperature.

1. a fish kill can occur when a pond

olls over\
a. because of the temperature shock.
b. because the cages sink to the bottom.
c. because of low levels of dissolved
d. because the fish turn upside down
b. matching
______ 1. salinity
a. measured in ppm calcium
______ 2. dissolved oxygen
b. recorded as degrees f or c
______ 3. turbidity
c. measured as ppm or percent
______ 4. temperature
d. depth of visual penetration
______ 5. ammonia
e. tan
______ 6. hardness
f. conductivity or ppt
c. completion

1. both plants and animals are part of the food ______
2. the ______ are where fresh water and seawater mix.
3. the ______ of a fish absorb oxygen from the water.
4. between 32 and 24 ppt is the salinity of ______.
5. trout need a ______ dissolved oxygen concentration to grow.
6. crawfish must ______, or break out of their exoskele

Explanation:

Answer:

1. b. holding constant or decreasing
2. d. ocean water
3. d. water is lost through evaporation
4. b. located in tidal areas
5. a. fish density
6. c. the more difficult the management
7. c. because of low levels of dissolved oxygen

B.

1. f. Conductivity or ppt
2. c. Measured as ppm or percent
3. d. Depth of visual penetration
4. b. Recorded as degrees F or C
5. e. TAN
6. a. Measured in ppm calcium

C.

1. web
2. estuaries
3. gills
4. ocean water
5. high
6. molt