Aquaculture

Lesson 5

1. Read the words.

cultivation

algaculture

mariculture

shrimp

tilapia

raceways

2. a) Cover the right column and read the English words. Translate them into Russian and check your translation.

b) Cover the left column and translate the Russian words back into English.

to refer kelp algae shrimp pearl yield

иметь отношение, относиться; бурая водоросль водоросли креветка жемчуг 1) а) плоды, урожай б) прибыль, доход в) размер выработки; количество добытого или произведенного продукта

3. Read the words and put down their Russian equivalents:

aqua farming ___________________________________

fish farming ____________________________________

aquatic organisms ________________________________

algaculture ______________________________________

shellfish ________________________________________

seaweed _______________________________________

4. Change the words according to the model. Translate the words.

Model: equal, unequal – неравный

acceptable

achieved

alike

analysable

assigned

controlled

dated

5. Master the following words.

milkfish – 1) ханос (Chanos chanos); ханосовые (Chanidae)

2) молочная рыба, белянка

catfish - сом

eel – угорь

carp - карп; сазан

amberjack - сериола, желтохвост

6. Define what the following numbers mean in the text below: 2.000000, 47, 2005, 150000, 17.

7. Read the text and define the meaning of new words.

Translate the text.

Aquaculture is the cultivation of aquatic organisms. Unlike fishing, aquaculture, also known as aqua farming, fish farming implies the cultivation of aquatic populations under controlled conditions. Mariculture refers to aquaculture practiced in marine environments. Particular kinds of aquaculture include algaculture (the production of kelp/seaweed and other algae); fish farming; shrimp farming, shellfish farming, and the growing of cultured pearls.

Fish farming is mainly done in fresh water (87 %), and is above all a type of subsistence aquaculture, providing animal protein for local populations. Asian carp are the most important species by far (common carp, grass carp, silver carp, bighead carp etc.), representing 19.5 million tonnes. Salmonid production is close to 2.0 million tonnes, with two large producers: Norway followed by Chile. Then come the tilapias, milkfish, catfish and eels. Yields vary from 100 kg per hectare (extensive) to 100 kg per m3 (intensive).

Marine fish farming represents 9% of world fish production. Amberjack (reared in Japan) have been produced at a stable level (about 150 000 tonnes) since 1980, while other species have seen their totals rise by a factor of 47 during the same period. In 1980, 17 different species were reared. In 2005 this had grown to more than 70.

8. Answer the questions.

1. What is the purpose of aquaculture?

2. Is algaculture a form of aquaculture?

3. Fish farming is the principal form of aquaculture, isn't it?

4. What is Mariculture?

5. What are the main branches of aquaculture?

6. What species are the most profitable?

9. Make sentences of the following words.

1. aquacultural, generally, leisure, for, extensive, a form, activities, management, land, production, is, of.

2. Aquaculture, on, species, activity, complete, the, a fish, refers, based, to, an, controlled, cycle, production, of.

3. The, however, Jacobi, credited, farming, trials, fish, first, are, to.

10. Pair work. Tell your group-mates about aquaculture. Let him/her put questions to you and answer them.

Дата добавления: 2014-12-26