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UNIT SPECIFIC OBJECTIVES CONTENT TEACHING AND LEARNING ACTIVITIES EVALUATION UNIT 2 STRUCTURE AND FUNCTION OF FISHERY ORGANISMS The student will be able to
3.2.1 assess the length and weight offish draw and label the external features of a fishery resource.
3.2.3 relate the external structures of a fishery organism to their functions.
3.2.4 relate the internal organs of bony fishes to their functions.
Fish
body measurement - total length
- standard length
-
fork length - weight External features of
- a mollusc e.g. cuttlefish- a crustacean e.g. shrimp, crab
- a cartilaginous fish e.g. shark, ray
- a bony fish e.g. Tilapia, claria.
Relationship between external structure to function e.g. streamlined body offish ease in movement fish fins
– for
swimming lateral line in fish – detection of vibration in water crustacean exoskeleton
– protection mollusc foot
– movement
echinoderm spine - defence Internal organs of bony fishes and their functions e.g. gills
– gaseous exchange alimentary canal
– digestion heart and blood vessels
–
circulation kidney – excretion gonads
– reproduction
Students to measure lengths and weights of various fishes. Students to draw and label external features of fishery organisms belonging to those listed under content.
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