Vocabulary

algae	водоросли
hatchery, hatcher	инкубатор
release	выпуск на волю
to enhance	увеличивать
recreational fishery	развлекательное рыболовство (платная рыбалка)
to endanger	подвергать опасности
to threaten	угрожать
seaweed	морская водоросль

Topic for discussion

1. Speak about use of seaweeds in our life.

Part 2

The aquaculturist exerts control over the species being reared. That control may include, but is not limited to the following:

1. Design, construction and maintenance of the culture system being employed.

Aquaculturists utilize ponds, cages, net-pens, race ways, tanks and other units. They do not attempt to convert unaltered natural water bodies into culture system.

2. Maintenance of suitable water quality.

In order foran aquaculture venture to be successful, the water must be of a quality suitable for the species being reared. Of most importance are the levels of dissolved oxygen and ammonia, water temperature and, in case of marine species, salinity.

3. Control over reproduction.

Unless the culture species can be reproduced in captivity, there is no way to undertake genetic selection and the improvement of the species with respect to its suitability for culture. Successful aquaculture of any species ultimately depends on captive breeding and producing brood stock from animals that are hatched in captivity.

4. Provision of nutritionally complete feeds.

Species being reared by aquaculturists are usually fed prepared feeds, similar to the feeds used by livestock producers. Such feeds contain the nutrients necessary to meet the daily requirements of the species under culture. In some instances, natural foods are relied upon (e.g. oyster and mussel culture), but for most species manufactured diets are employed.

5. Control of diseases.

Aquatic organisms, like other plants and animals, are susceptible to diseases of various kinds. The aquaculturist must be able to recognize the diseases that affect the particular species being cultured and know how to treat them properly.

Vocabulary

maintenance	эксплуатация, сохранение, поддержка, содержание
cage	садок, клетка, изолятор
pond	пруд
net-pen	огороженное место сетями для выращивания объектов марикультуры, садок
race way	рыбоходный канал, зд. лоток
venture	предприятие
to dissolve	растворять, разжижать
ammonia	аммиак
captivity	неволя
breeding	разведение
brood stock	маточное стадо
feed	кормление, питание
nutritional	питательный, пищевой
to meet requirements	отвечать требованиям
disease	болезнь
treat	лечить
aquatic	водный

Answer the questions

1. What may control over the species include?

2. What is important for suitable water quality?

3. What does successful aquaculture depend on?

4. What are reared species usually fed with?