Fisheries Paper 2 Alt B, WASSCE (SC), 2022

Question 5

 

(a) List four methods involved in capture fisheries.                                            [4 marks]

(b)Mention four ways of reducing high plankton turbidity in a fish pond.         [4 marks]

(c)State four ways of managing hatchlings in a fish pond hatchery.                 [4 marks]

 

(d)(i) Name three by-products of fish.                                                        [3 marks]

(ii) Name one use of each of the by-products named in 5(d)(i).                [3 marks]

(e) Mention two materials used for mending fish net.                                         [2 marks]

 

Observation

 

This question was attempted by many candidates and their performance was good. In Question 5(a), the methods were used interchangeably with the gear. Candidates also mixed fish by-products were mixed with the products and uses.

 
The expected answers are as follows

(a)        Methods involved in capture fisheries
                       
-           Hook and line method/ long lining
-           Cast netting
-           Set netting/gill netting/ netting
-           Trawling
-           Trapping
-           Harpooning/ spearing
-           Purse seining
-           Trolling
-           Noodling/ fishing with hand/ flounder tramping

 

(b)        Ways of reducing high plankton turbidity in fish ponds

            -           Stop manuring
-           Add fresh clean water
-           Aerate the water
-           Flush the pond / drain and replace the water/ change water regularly
-           Lime the water                                   
-           Use of algaecides                                                                                                                                                                                                       

(c)        Ways of managing hatchings in a fish pond hatchery

            -           Maintain optimum water quality
-           Feed with natural fish food
-           Introduce artificial feed based on size
-           Remove/ siphon dead and unfertilised eggs/ unhatched eggs
-           Maintain clean environment/ maintain good sanitation
-           Remove shooter / jumpers
-           Transfer to grow-out / production pond / tanks
                                                                                               

(d)       (i)         By-products of fish

                        -           Fish oil/ fish liver oil
-           Fish skin
-           Shells/ scales
-           Fish entrails
-           Fish bones, gills and fins
                                                                                                           

(ii)        Uses of fish by-products

                        Fish oil
-           source of food
-           medicine
                                                                                                           

                        Fish skin
-           For making bags, belts, shoes/ leather
-           Skin grafting

                        Shells/ scales
-           Medicine and pharmaceuticals
-           Cleaning / scorching powder
-           Decoration
                                                                                                           

                        Fish entrails
-           Manufacture animal feed
-           As bait for fishing
-           For manure / fertilizer
                                                                                                           
                        Fish bones, gills and fins
-           To manufacture animal feed
-           Decoration
-           Medicine
                                               
(e)        Materials used for mending fishing net

            -           Mending needle
-           Twine
-           Netting material / netting
-           Knife