Habitats, salt, inland, salinity, brackish, temperature, warmwater, coldwater, middle reach, aqua-systems.

 

Choose key sentences from each paragraph of the text. Write them down.

Considering the sentences from ex.1.12., give the definition of the following terms: fresh waters;salt waters; brakish waters.

Step 2

Grammar Point(speaking-writing)

Put questions to the italicized words.

1. The children go to bed at ten o’clock.

2. His son knows English well.

3. My father reads newspapers in the morning.

4. Our parents grow potatoes.

5. At the lessons we read and speak English.

Choose the right form of the verb from the brackets

1. I…. like him. /do not, does not/

2. What … you want to know? /do, does/

3. I…not want to believe in that story. /do, does/

4. He …… like this song. /do, does/

5. Why …you keep the door open? /do, does/

Change the following into the Past Indefinite

1. His father works at a plant.
2. Do your students read English books?
3. We understand the rule.
4. They do not change the train there.
5. My friend does not like such films.

Choose the right form of the verb from the brackets

1. But I … good tomorrow. /am, is, are, was, were, will be/
2. I … everything you tell me. /do/does/did/will do/.
3. I … explain it all tomorrow. / do, explained, will explain./
4. We … with you later. /talks, talk, will talk/.
5. I know he …never… /will return, returned, return/.

Step 3

Project Work Discussion

(Speaking-Reading-Speaking-Writing)

Read and translate text B. Use the dictionary. Pick up unknown words into your copybooks.

Text B. Classification of Aquaculture.

Notwithstanding differences in the physio-chemical characteristics of its habitats aquaculture systems are of several kinds. Most of the systems are highly variable in magnitude and intensity ranging to serve as one family units or large scale commercial enterprises.

Based on the number of species that are cultured in a system, aquaculture may be classified into: a) monoculture; b) polyculture.

Monoculture, as the name implies, is the culture of a single species of an organism in a culture system of any intensity, may be in any type of water, fresh, brackish or salt.

E.g. Fresh water: common carp in East Germany.

Brackish water: mullet culture in several countries.

Seawater: pacific salmon in North America.

Feeding with species specific feed is the main basis for monoculture in the case of finfish.

Polyculture, as the name implies, is the culture of several species in the same waterbody. The culture system generally depends on natural food of a waterbody sometime augmented artificially by fertilization and/or by supplementary feeding. If artificial food is given it is a common food acceptable to all or most species that are cultured.

E.g. Freshwater: polyculture of several Indian major carp species in India.

Brackishwater: mullet and shrimp culture in Israel.

 

3.2. Define the terms:

a) monoculture,

b) polyculture.

In pairs reformulate the information from text A and text B as an interview, write down these questions into your copybooks. Information from exercise 1.11 will be of help to you too.

Test. 3

Choose the right answer:

1. Fresh waters … in the inland of the country.	a – abound;
b – abounded;
c – abounds.
2. Wide difference in salinity … the salt water of the seas and oceans.	a – characterized;
b – characterizes;
c – characterize.
3. The salt content of fresh sea water … a very selective influence on the fauna and flora.	a – exercises;
b – exercise;
c – exercised.
4. Brackish water … in estuaries, deltas of rivers.	a – occurred;
b – occurs;
c – occur.
5. The salinity of the water … widely.	a – fluctuate;
b – fluctuated;
c – fluctuates.
6. The salinity of water … on the phase of the tide.	a – depended;
b – depends;
c – depend.
7. Water temperature … a selective influence on fish.	a – exercises;
b – exercised;
c – will exercise.
8. Warmwater fish … in contrast with the temperature of coldwater fish.	a – is;
b – am;
c – are.
9. A river … a coldwater section in its upper riches.	a – have;
b – has;
c – will have.
10. Aquaculture systems … of several kinds.	a – is;
b – was;
с – are.
11. Most of the systems …variable in magnitude.	a – was;
b – were;
c – are.
12. Specific food… the main basis for monoculture in the case of finfish.	a – is;
b – was;
c – will be.
13. Polyculture … the culture of several species.	a – is;
b – was;
c – will be.
14. The culture system … on natural food of a waterbody.	a – depended;
b – depends;
c – depend.
15. Usually it... in winter.	a – snowed,
b – will snow,
c – snows.
16. He... TV yesterday.	a – watched,
b – will watch,
c – watch.
17. I often... my sister for a walk.	a – will take,
b – took,
c – take
18. She... the film yesterday.	a – enjoys,
b – will enjoy,
с – enjoyed.
19. I... at seven o’clock every day.	a – got up,
b – will get up,
c – get up.
20. At the office we... till five o’clock.	a – work,
b – worked,
c – works.
21. His mother... a housewife.	a – am,
b – is,
c – are.
22. They... happy to see you.	a – is,
b – was,
c – are.
23. Yesterday he... home late.	a – got,
b – get,
c – will get.
24. What.... you... on Saturday?	a – do,
b – will do,
c – did
25. He... in the town next year.	a – were,
b – will be,
c – is.

 

 

Unit 4

1.Aquaculture Water Facilities 2. Specific Type of a Fish Farm 3. Continuous Tenses

Step 1