Aquaculture Flashcards
A culture system that is built in deep waters. It uses fiberglass,plastic or steel and nets held up by floaters.
a. Fish pond b. Fish pen
c. Fish cage d. Fish tank
c. fish cage
A culture system that is enclose (earthen or concrete) built toretain water for the purpose of growing fish.
a. Fish pond b. Fish pen
c. Fish cage d. Fish tank
a. fish pond
These are floating structures in open water and are usually
located within a pond, lake, reservoir, river, estuary, or openocean environments.
a. Fish pond b. Fish pen
c. Fish cage d. Fish tank
b. or c.
Part of cage structure that keeps the cage at the surface of the water and helps maintain the shape of the cage in the vertical and horizontal planes. It can be made of large diameter rubber hose or high-density polyethylene tubes or pipes.
a. Floats b. Collar
c. Nets d. Mooring
a. floats
Part of cage structure that maintains the shape of the cage in the horizontal plane. It may simply be a ring of metal placed at the bottom of the cage to weigh the cage down in the required shape or it can be a complicated design involving flotation and weights.
a. Floats b. Collar
c. Nets d. Mooring
b.collar
A type of net in cages that holds the cultured stock.
a. Main net b. Covering net
c. Predator net d. Jump net
a. main net
This net in cage system keeps sea-borne predators away from the cultured stock to reduce predation. It is placed outside the main net.
a. Main net b. Covering net
c. Predator net d. Jump net
c. predator net
This net in cage system is placed over the top of the cages to prevent birds landing, fouling, scavenging and preying on cultured stock.
a. Main net b. Covering net
c. Predator net d. Jump net
b.covering net
This net in cage system projects vertically out of the water
around the main net, preventing fish escaping.
a. Main net b. Covering net
c. Predator net d. Jump net
d. jump net
These are used to secure the cage at the selected site.
a. Floats b. Collar
c. Nets d. Moorings
d. moorings
Aquaculture facilities associated with reproduction, larval
rearing and supply of juveniles to farms.
a. Nursery b. Grow-out
c. Hatchery d. None of the above
b. hatchery
A measure of the amount of oxygen that bacteria will consume
while decomposing organic matter under aerobic conditions.
a. BOD b. COD
c. DO d. EC
a. BOD
A measure of the total quantity of oxygen required to oxidize all
organic material into carbon dioxide and water.
a. BOD b. COD
c. DO d. EC
b. COD
COD values are always greater than BOD values, but COD
measurements can be made in a few hours while BOD measurements take five days
A measure of the amount of free hydrogen ions in water.
a. EC b. pH
c. DO d. EC
b. pH
Specifically, pH is the negative logarithm of the molar concentration of hydrogen ions.
• pH = -log[H+]
Part of a pond dike (main dike) that provides additional stability and it slopes towards the dike wall to trap eroded soil particles during rains. It also serves as small ditch that conveys runoffs towards the outlet gate especially when acidity of exposed dike is a management problem.
a. Crown b. Base
c. Berm d. Side slope
c. berm
