Answer any three questions.
(i) State four effects of turbid water on cultured fish.(4 marks)
(ii) In a tabular form, mention four differences between artisanal and commercial fisheries.(4 marks)
b. Write short notes on the following:
(i) (ii) Monoculture Screen(2 marks)
(iii) Fishing (2marks)
(iv) Filleting (2 marks)
C. Mention four management practices in post stocking of fish.
2 a. (i) Draw a well labelled diagram (10-12cm long) of secchi disc.
(ii) Name four features of a concrete pond.
b. In chronological order, list six steps involved in earthen pond construction.
(i) Enumerate five benefits of aquaculture in urban area.
C. Mention six sources of water for fish farming.
Write short notes on the following:
(iii) Filter feeder
C.(i) Define water quality
(ii) List five quality parameters of freshwater.
(i)It reduces the activeness of the fishes
(ii)It hinders the growth of algae and other aquatic plants
(iii)It cause decrease in the amount of light for photosynthesis.
(iv)Turbidity can also increase water temperature.
(i)It is done in a small scale
(ii)Low technology is involved
(iii)Low capital is required
(iv)The fishing practice is undertaken by individual fishing household.
(i)It is done in a large scale
(ii)High technology is involved
(iii)High capital is required
(iv)The fishing practice is not undertaken by individual fishing household
Monoculture is the type of aquaculture that involves the stocking of more than one species of fish in the same rearing facility at a given time.
screen is a structure built to prevent fish from entering hydroelectric dams, aqueducts, diversion rivers, or other man-made structures.
Fishing is the capture of aquatic organisms in marine, coastal and inland areas.
Fish fillets comprise the flesh of the fish usually obtained by slicing the fish parallel to the spine, rather than perpendicular to the spine as is the case with steaks
(iii)prevention of the introduction of serious disease agents;
(iv)confinement of disease outbreaks to affected areas
(i)Concrete Ponds: are usually constructed with concrete and sometimes reinforced to make them stronger.
(ii)It can be constructed on dry land.
(iii)It cannot be flooded.
(iv)It has manageable surface area.
STEP 1: PREPARE THE SITE.
STEP 2: PEG OUT THE POND AREA.
STEP 3: CONSTRUCT CLAY CORES.
STEP 4: EXCAVATE THE POND AND CONSTRUCT DYKES.
STEP 5: INSTALL DRAINAGE SYSTEM.
STEP 6: INSTALL WATER INLET PIPE.
(i)Alternative Food Source
(ii)Alternative Fuel Source
(iv)Reduce Sea Food Trade Deficit
(v)Creates a Barrier Against Pollution
A grazer is an animal, usually a herbivorous mammal, which eats grass. It is contrasted with browsers, which eat trees & shrubs.
A carnivore is an organism that mostly eats meat, or the flesh of animals. Sometimes carnivores are called predators.
an animal (such as a clam or baleen whale) that obtains its food by filtering organic matter or minute organisms from a current of water that passes through some part of its system.
herbivore is an animal that feeds mainly or only on plants. In a food chain, herbivores are primary consumers.
Water quality refers to the chemical, physical, and biological characteristics of water based on the standards of its usage.