COT Structure and market forms of fish.pptx

Introduction:

Fishes are marine animals that have a streamlined body that helps them swim without much resistance in the water, and they also have fins to assist them in swimming.

General characteristics of Fish
They are bilaterally symmetrical organisms, and they are triploblastic organisms.
Fishes have segmented bodies. Internal segmentation is present.
The majority of the fish are spindle-shaped, with others being Dorso-ventrally depressed, laterally compressed, snake-like (Mastacembelus), and globe-like (Tetradon).
Fish Anatomy
Fish anatomySource

Exoskeleton:

Scales and bony plates cover the fish’s body.
Scales are recognized as a fish’s identity card because of their many roles.
The genesis of scales is mesodermal.
Siluriformes fishes have no scales (catfishes), and few fishes (major carps) have scales on their heads.
Fins:

Fins help in swimming and balance.
Fin rays support the fins, and fins feature both spiky and soft rays.
Fins without fin rays are known as adipose fins (Mystus).
Fins are divided into two categories: paired and unpaired fins.
Pectoral and pelvic or ventral fins are paired fins.
The dorsal, anal, and caudal fins are the only ones that aren’t paired.
Fins are either typical or modified in the majority of fish.
Tail:

During swimming, the tail is important for shifting direction.
The caudal fin is the last fin on the tail.
The caudal fin can be forked, circular, or confluent with the dorsal and anal fins.
Closed circulatory system:

Fishes have a closed circulatory system.
The heart is divided into two chambers, is venous and tubular, and has either a conus or bulbous arteriosus and RBCs have a biconvex shape.
Nervous system:

Cerebrum is not well developed in the nervous system, and sharks, in particular, have well-developed olfactory lobes.
There are ten pairs of cranial nerves discovered.
Respiration:

Branchial respiration occurs via gills.
The branchial chamber is where the gills are found.
There are 5-7 gills in cartilaginous fishes, but in teleosts, there are 3- 5 gills.
Gill arch supports each gill, gill lamellae facilitate gaseous exchange, and gill rakers are extensively developed in plankton-feeding fishes, where they serve as a filter.
In cartilaginous fishes, the branchial system is open, but the branchial system is closed in bony fishes.
The operculum is exclusively seen in bony fish.
There are many pairs of external branchial apertures, but there is only one pair in bony fishes.
Hemoglobin is a pigment found in the blood.
Excretion:

Mesonephric kidneys are found in ammnotelic animals’ excretory systems.
Marine fish keep urea in their blood to stay in an isotonic state with saltwater.
Economic Importance:
They’re eaten worldwide, and the fish liver is the primary source of vitamin A and D-rich liver oil.
Fish oils are utilized externally in the soap industry and tanneries.
Beautifully colored fishes are currently the vogue in aquariums.
Conclusion:
Fishes are water animals having a streamlined body that

1. cot ma. Aprille t. erilla SST-I sto . ni Ňo is / gandara iI DISTRICT

2. Activity 1: name me! Direction: label the parts of the fish

3. Let’s process: What was your guide in completing the picture? What do you think is the relevance of this activity to our lesson today?

4. STRUCTURE OF FISH AND CLASSIFICATION OF SEAFOODS

5. Objective: a t the end of the lesson, the students are able to: identify the external parts of fish classify types of seafoods

6. Objective: a t the end of the lesson, the students are able to: appreciate the importance of seafoods in our daily lives.

7. EXTERNAL PARTS OF A FISH

8. Activity 2: Family Feud 5-minute activity. Group the class into 2. Each group should have a family name. You can choose between “ fin fish family and shell fish family”.

9. What was your guide in completing the Activity?

10. Classifications of Seafood Seafood? - is any form of sea life regarded as food by humans.

11. Seafood includes fish and shellfish

12. Fish products are divided into two categories: 1. Fin fish 2. Shell fish

13. Fin fish – fish with fins and internal skeletons A. Saltwater Fish B. Freshwater fish

14. A. Saltwater fish – Flatfish -Flounder -sole

15. Round fish -Black sea bars -Bluefish -Cod -Grouper

16. B. Freshwater fish Cat fish Eel Tilapia

17. Shell fish - fish with external shells but no internal bone structure. they have hard outer shells Two classifications of Shellfish Mollusks Crustaceans

18. Mollusks – are soft sea animals Bivalves – they have a pair of hinged shells (clams, oysters)

19. Univalves – they have a single shell (abalone)

20. Cephalopods – (octopus, squid)

21. B. Crustaceans – are animals with segmented shells and jointed legs (shrimps, crabs)

22. Remember! Fish and seafoods have a great importance in our daily lives especially to ordinary people who are less fortunate to buy meat. They can still acquire the nutrients needed by our body which meat can provide with equally nutritious that a fish and seafoods can.

23. Remember! Fish and seafoods in any form are beneficial to human body because of the nutrients they have, it also provides a source of income to many individuals or families in the community that contributes greatly to the economic growth of the country.

24. Activity 3: Identification Directions: Label the parts of the fish. Write your answer in your answer sheet.

25. Activity 4: CLASSIFICATION OF SEAFOODS Directions: Classify the types of Seafoods.

26. FIN FISH SHELL FISH 1. 2. 3. 4. 5. 1. 2. 3. 4. 5. - MILK FISH -TILAPIA -CLAMS -SHRIMP -EEL -CATFISH -CRAB -OYSTER -SQUID -LAPU-LAPU

27. LATERAL LINE EYE/S SPINY DORSAL FIN SOFT DORSAL FIN ANAL FIN

28. FIN FISH SHELL FISH 1. MILK FISH 2. LAPU-LAPU 3. TILAPIA 4. EEL 5. CATFISH 1. SHRIMP 2. CRAB 3. OYSTER 4. CLAMS 5. SQUID - MILK FISH -TILAPIA -CLAMS -SHRIMP -EEL -CATFISH -CRAB -OYSTER -SQUID -LAPU-LAPU

29. Homework! Answer the following in a ½ sheet of paper: What are the market forms of seafoods?