Dissection of prawn?

1. How do you dissect prawns?
2. What is Nervous System of prawn?
3. What are the characteristics of prawn?
4. What covers the body of the prawn?
5. Where is the brain of a prawn?
6. What is the economic importance of prawn?
7. Do prawns have a stomach?
8. Where is the Hastate plate found in prawn?
9. What is the life cycle of a prawn?
10. Do prawns migrate?
11. Can prawns be farmed?
12. What are the Locomotory organs in prawn?
13. Why is the heart of a shrimp in its head?
14. What is the name of digestive gland in prawn?

How do you dissect prawns?

Lift the carapace from the lateral sides and cut it loose at the anterior end. Cut the inner lining membrane and the carapace is separated. Remove the abdominal terga with the pleura by making two parallel cuts along the ventrolateral lines of the abdomen starting from the anterior end and running up to telson.

What is Nervous System of prawn?

Nervous System:

The nervous system is represented by a median ventral nerve cord running in the median line just above the ventral abdominal artery at the base of flexor muscles. This nerve cord runs through the abdomen and in each segment has a ganglion.

What are the characteristics of prawn?

Prawns are crustaceans with a shell, five pairs of swimming legs (pleopods), five pairs of walking legs, three with claws, and a tail. A variety of species, mostly brown tiger (tiger), western king (king) and banana prawns are harvested, mainly in northern regions.

What covers the body of the prawn?

The prawn body divided into cephalothorax and abdomen is covered by a chitinous exoskeleton, normally consisting of 19 segments.

Where is the brain of a prawn?

As with humans, the main processing organ in the shrimp central nervous system is the shrimp brain. The shrimp brain is much smaller, composed of only a few nerve cell clusters, or ganglia. It its found on the back, or dorsal, side of the shrimp's head.

What is the economic importance of prawn?

The prawns are one of the most economically important fishery organism of India. It helps to earn a sizeable amount of foreign exchange. The prawns are the most esteemed food among the marine food organisms. There-fore, they are in great demand both in the local and international markets.

Do prawns have a stomach?

The digestive tract of shrimp is divided into three main parts, the foregut, midgut and hindgut (Ceccaldi, 1997). The foregut (proventriculus, stomach) comprises the oesophagus and the part of the stomach where mastication occurs.

Where is the Hastate plate found in prawn?

Hastate plate is present in the Cardiac Stomach part of the alimentary canal.

What is the life cycle of a prawn?

There are four stages in the life of a freshwater prawn, viz, egg, larva, juvenile and adult (see Figure 1).

Do prawns migrate?

After over-wintering in the estuaries and lakes the juvenile prawns grow rapidly and upon some cue, start to migrate back to the ocean. These migrations rise to a peak in the 'dark' period of the summer, lunar cycles and are fished enthusiastically by both amateur and professional fishermen.

Can prawns be farmed?

There are two types of commercial prawn and shrimp production. Capture fishing means wild species are caught from oceans, rivers, seas and lakes, usually by bottom trawlers, while aquaculture farms prawns and shrimp in controlled conditions.

What are the Locomotory organs in prawn?

3. Locomotion of Prawn: The prawn moves in three different ways—crawling, swimming and darting. At the time of crawling the animal straightens its body and rests over five pairs of walking legs.

Why is the heart of a shrimp in its head?

It is FALSE. A shrimp's heart is located at the bottom of its head. Shrimps also have an open circulatory system: they have no arteries and their organs float directly in blood.

What is the name of digestive gland in prawn?

The hepatopancreas, digestive gland or midgut gland is an organ of the digestive tract of arthropods and molluscs.