WELCOME TO OUR PRESENTATION

A PRESENTATION ON

FISH TRANSPORTATION

INTRODUCTION

Fish Transportation is a process by which fish is transported from one place to another place in a scientific way.

It plays an important role in the distribution of quality fish fry among a country or even the world.

Fishes are transported mainly for three purposes :I. For breeding purposes

II. Stocking in nursery pondIII. For selling purposes

TOLERANCE TO TRANSPORT

A Famous saying in fish culture is,' Fish are not potatoes’. They need tender care

and love to remain strong and healthy.

Tolerance of fish to transport depends on their ability to resists or adapt to

stressful condition.

Tolerance varies with species to species. Some species mainly species having air

breathing organ are more tolerant to transport. E.g. Oreochromis spp. , Cyprinus

carpio etc.

Some medium tolerant species including Bighead carp, Grass carp

Low tolerant species- Silver carp

CONDITIONING OF FISH BEFORE TRANSPORTATION

o Conditioning is the pre-requisition of fish transportation.o Conditioning reduces the mortality rate during transportation.o The temperature of the conditioning water should not be high –

it should be preferably on the lower side of the optimal thermal range of the species.

o Fry, fingerlings should not be handled with bare hand- the slime over the fish body should remain in tact.

o Fish survived better if they have no food in their intestine.

METHODS FOR PACKING AND TRANSPORTATION

There are two system for packing of fish fryI. Open systemII. Close system

OPEN SYSTEM It is a traditional method .

Open system comprising with open carrier with or without artificial aeration/oxygenation/water circulation.

Plastic or metal drums or traditional earthen pot “hundi” are used for fish transporting.

Mainly two types of hundies are used in transportation:

I. 20cm diameter-23L capacity

II. 23cm diameter-32L capacity

In this system, dissolved oxygen content is maintained through splashing of water during movement.

OPEN SYSTEM

Figure: Open System of Fish Transportation

OPEN SYSTEM

ADVANTAGES:i. It is cheap and easier methodii. Equipment are locally availableiii. It keep water cool for long timeiv. No need to oxygen supply from outsidev. More suitable for broodfish

OPEN SYSTEM

DISADVANTAGES:I. Relatively less amount of fish can be transported at

a time.II. Needs close observation.III. Not suitable for larger distance.

CLOSE SYSTEM

It is the modern transporting system In this system , we have to maintain adequate oxygen supply in the

water while transporting fish Plastic or metal container, Rubber and plastic bags are used in this

system for transporting fish One-fourth of the bag usually containing water and fish and three-

fourth of the bag filled with oxygen. After adding oxygen, the bag is sealed shut with a twisted rubber band. Woven grass or sometime ice is also used during packing of fry bag to

provide insulation from heat.

CLOSE SYSTEM

Figure: Close System of Fish Transportation

CLOSE SYSTEMADVANTAGES: Oxygen can be supplied easily Mortality rate is very low Easily transportable It can be transported from a long distance even from one

country to another Large number of fish can be transported at a time It is most suitable for commercial fish farm

CLOSE SYSTEM

DISADVANTAGES: It is a cost effective method Packing materials are not locally available Need skilled person for packing and handling Additional oxygenation is required

CAUSES OF MORTALITY IN TRANSPORRTATION

I. Oxygen depletion due to oxidation of organic materials.II. Accumulation of free Carbon-di-oxide,, resulting from

respiration and Ammonia as excretory product.III. Sudden fluctuation in temperature.IV. Hyperactivity and stress due to handling.V. Ion-osmotic imbalance due to stress.VI. Physical injury due to handlingVII.Diseases.

CHEMICALS USED IN FISH TRANSPORTATION

Drugs and chemicals are either used as tranquilizers and sedatives or as antiseptic.

Sedatives are mainly used for :

I. Reducing metabolic rates

II. Reducing excitability of fishes

III. Convenience in handling fish Several drugs have been studied for use as anesthetic for transport of

fish.

E.g. Tricaine methane sulphonate (MS-222), Sodium amytal, Quinaldine, Novocaine etc.