Observation

 

This question was attempted by many candidates and their performance was good. The candidates understood the questions but failed to put conjunction in 1(c) which requires differences and both sides did not tally.

The expected answers are as follows: 
(a)        (i)         Explanation of fish pond management
                       
                        It is the application of practices to achieve optimum growth/yield of fish and
also make maximum returns or earnings through the provision of suitable environment for growth

            (ii)        Modern methods of preserving fish

-           Freezing/chilling                      -           Canning
-           Irradiation                               -           Pickling

(b)        Advantages of plastic tanks over concrete tanks for fish culture

            -           Cheaper to purchase
-           Easy to install
-           Occupies relatively small space
-           Easy to move about
-           Readily available
-           Convenient to manage

 

 

 

(c)        Differences between intensive and extensive systems of aquaculture

Intensive	Extensive
Fish are fed with complete diet	Depends on natural food
Requires high capital	Low capital requirement
High stocking density/rate	Low stocking density/rate
High output per unit area	Low output per unit area
High technology	Low technology
Production factors are monitored	Production factors are not monitored
Requires the use of skilled labour	Use of unskilled labour

                       

                                                                                   
           

 

 

 

Note: Tabular form or use of conjunction to score

(d)       Management practices in extensive system of fish culture
                       
-           Liming of pond water             -           Fertilization of pond water
-           Stocking of fish pond              -           Rearing of fish
-           Harvesting                               -           Marketing
-           Weeding

(e)       (i)         Explanation of automated feeding method                   
It is the use of feeding device that releases a specific amount of feed into the water at a specific time interval
                                                                                               
(ii)        Advantages of automated feeding
-           Requires minimal human intervention/saves time
-           Supplies feed to fish when required
-           Minimizes water pollution/feed wastage
-           Supplies feed to fish throughout the day/ad libitum
-           Prevents overfeeding of fish

                        -           It can hold enough feed to last fish for some days