2019 WAEC FISHERY PRACTICAL FREE ANSWER

SPECIMENS
A=Fetilize
B=Cow dung
C= pond water
D=Sec Chi disk
E=Fish water
F=knife
G=Fish meal
H=fish box
J=Fish skin
K=gill net
L=Cast net

(1ai)
Fertilizers used in ponds stimulate the growth of microscopic plants called algae or plankton

(1aii)

(i) Fertilizers are used in ponds to increase the production of the natural food organisms to be eaten by the fish.

(ii)When a fertilizer is added to a fish pond, the chemicals it contains dissolve in the water which have advantage over cow dung

(ii)The chemicals attached to soil particles may also later be released back into the water slowly, over a long period of time which have advantage over cow dung

2ai)
Specimen D, E, F

i)
Specimen D:
is used to test the pH of a liquid

ii)
Specimen E:
To ensure accurate data, always double-check the units (e.g. feet, meters, etc) used to mark your Secchi disk and the distance between the rope’s marking intervals (e.g. every meter, every half-meter, etc).

ii)
Specimen F:
Easier to ship, store and handle than hay.

(3a)
Fish bag

(3b)
(i)
Making leather

(ii)
For burn relief
(iii) Fish gelatin obtain from fish skin can be used in the food, pharmaceutical, and photographic industries due to its unique chemical and physical properties

(3c)
(i) For cutting fishes like head cutting, cutting into steaks
(ii) For chopping of cartilages and tendons

(3d)
(i) Fish liver oil
(ii) Fish bone
(iii) Fish Manure
(iv) Fish Body oil
(v) Fish Silage

(3e)
(i) By washing properly
(ii) Sharpen the blade when blunt
(iii) Always cut on cutting boards
(3a)
Fish bag

(3b)
(i)
Making leather

(ii)
For burn relief
(iii) Fish gelatin obtain from fish skin can be used in the food, pharmaceutical, and photographic industries due to its unique chemical and physical properties

(3c)
(i) For cutting fishes like head cutting, cutting into steaks
(ii) For chopping of cartilages and tendons

(3d)
(i) Fish liver oil
(ii) Fish bone
(iii) Fish Manure
(iv) Fish Body oil
(v) Fish Silage

(3e)
(i) By washing properly
(ii) Sharpen the blade when blunt
(iii) Always cut on cutting boards.

(4a)
(i)Wedged
(ii)Gilled
(iii)Tangled

(4aii)
(i) Wedged – held by the mesh around the body.
(ii) Gilled – held by mesh slipping behind the opercula.
(iii) Tangled – held by teeth, spines, maxillaries, or other protrusions without the body penetrating the mesh.

(4aiii)
Specimen K
(i) 2-3cm
(ii) Low cost
(iii) It is selective in harvesting
(iv) It harvests mature fishes

Specimen L
(i) 4-7m
(ii) High cost
(iii) It is not selective in harvesting
(iv) It harvests any fish

(4b) DISADVANTAGES OF SPECIMEN L:
(i) High cost
(ii) Time consuming

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