Aquaculture Techniques and Species

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Questions and Answers

During which months are spat of Crossostrea madrasensis generally most abundant?

April – June (correct)

July – September

January – March

October – December

What is the primary source of pearl oyster seeds in aquaculture?

Hatchery produced seeds (correct)

Wild collection

Natural breeding in coastal lagoons

Seeds from mangrove areas

Which of the following shrimp species is not considered cultivable in India?

Penaeus semisulcatus

Penaeus indicus

Penaeus monodon

Penaeus vannamei (correct)

Which factor does not significantly affect shrimp seed abundance?

Seismic activity Signup and view all the answers

Where are the seeds of mud crab, Scylla serrata, primarily distributed?

East coast of India Signup and view all the answers

What is the primary characteristic of P.monodon that allows it to thrive in various habitats?

Wider salinity tolerance Signup and view all the answers

When is the seed availability of shrimp particularly abundant?

At full moon and new moon night tides Signup and view all the answers

Which coastal region of India does not report availability of edible oyster seeds?

Rajkot Signup and view all the answers

What is the optimal salinity range for certain aquaculture species?

10 to 35 parts per thousand Signup and view all the answers

Which soil type is generally preferred for aquaculture operations?

Clay or clayey loam soil Signup and view all the answers

What is a critical factor in determining farm size for aquaculture?

Quantity of water and extent of land available Signup and view all the answers

What water quality aspect is essential for good aquaculture productivity?

High natural productivity Signup and view all the answers

What must be ensured to facilitate proper water management in aquaculture?

Proper drainage system Signup and view all the answers

Which elevation characteristic is important for aquaculture land?

Suitable elevation for easy drainage Signup and view all the answers

What is an important infrastructure need for aquaculture operations?

Good electricity connection and supply Signup and view all the answers

What affects the quantity of water required in aquaculture ponds?

Soil type and climatic conditions Signup and view all the answers

What is the dominant species of lobster in the Mandapam area?

P.ornatus Signup and view all the answers

What is the maximum growth size of Panulirus ornatus?

50 cm Signup and view all the answers

Why is site selection critical in aquaculture operations?

It affects the feasibility of viable operations. Signup and view all the answers

What factors generally influence site selection in aquaculture?

Access to public utilities and markets. Signup and view all the answers

Which crab species ranks third in importance as gourmet food among marine crustaceans?

Scylla tranqibarica Signup and view all the answers

What are the two pairs of spines on the antennular plate of Panulirus ornatus?

Anterior and posterior Signup and view all the answers

What is a common characteristic of the body segments of Panulirus ornatus?

They are smooth without transverse grooves. Signup and view all the answers

What challenges can arise from poor site selection in aquaculture?

Abandonment of farms after investments. Signup and view all the answers

What is the purpose of fry collection in aquaculture?

To source quality seed for culture systems Signup and view all the answers

Which aspect is NOT typically addressed in water management for aquaculture?

Controlling feed types Signup and view all the answers

What is a primary consideration when selecting shrimp fry for stocking?

Size of the fry Signup and view all the answers

What is the primary goal of pond preparation in aquaculture?

To create optimal living conditions for aquatic species Signup and view all the answers

Which of the following is essential in the grow-out operations of crustaceans?

Aeration techniques Signup and view all the answers

Which of the following statements about oyster culture techniques is accurate?

Oysters can thrive in a variety of environmental conditions. Signup and view all the answers

What is a common challenge in the culture of groupers?

Difficulty in sourcing quality seed Signup and view all the answers

What must be monitored closely in shrimp culture systems to ensure success?

Water salinity levels Signup and view all the answers

What is a major constraint to the development of tropical mussel culture?

Limited demand and low price Signup and view all the answers

Which country is NOT mentioned as having developed techniques for the production of H.scabra?

Malaysia Signup and view all the answers

What compensates for the low economic value of mussels?

Ease of culture and high productivity Signup and view all the answers

What is one of the constraints to hatchery production of H.scabra in Indonesia?

Accessibility to suitable brood stock Signup and view all the answers

What is a primary reason for focusing on sea ranching of mussels?

Limited growth at high densities Signup and view all the answers

What type of reproduction do cultured seaweeds utilize?

Vegetative reproduction Signup and view all the answers

What is a common method used for the grow-out of seaweeds?

Natural substrates and long-lines Signup and view all the answers

What infrastructure requirement is typically low for sponge aquaculture?

Need for advanced equipment Signup and view all the answers

Study Notes

Aquaculture Overview

Diverse species cultured in aquaculture: groupers, snappers, shrimps, lobsters, and crabs.
Emphasis on grow-out operations, pond preparation, water management, and supplementary feeding.

Culture Practices

Grey mullet culture includes systems, fry collection, and operational strategies.
Asian seabass culture focuses on sourcing seed and grow-out methods.
Grouper culture addresses biology and seed supply essentials.

Crustacean Cultivation

Shrimp culture requires attention to systems, characteristics, and operational considerations.
Key steps in shrimp production: pond preparation, fry selection, stocking, feeding, water management, aeration, and harvesting.
Mud crab culture utilizes specific methods for effective growth and sustainability.

Mollusca and Seaweed Aquaculture

Oyster culture involves specialized techniques, with Indian practices highlighted.
Mussel farming faces economic constraints but benefits from ease of culture and high productivity.
Techniques for cultivating seaweed include natural substrates and low-cost production technologies.

Seed Resources

Availability of key species for aquaculture: shrimp (Penaeus monodon, P.indicus, P.semisulcatus), mud crab (Scylla serrata), and oysters (Crossostrea madrasensis).
Shrimp seed abundance affected by environmental factors such as tides, lunar phases, and pollution.
Importance of hatchery-produced seeds in aquaculture due to limited natural availability.

Site Selection and Water Management

Critical factors in site selection for aquaculture include environmental conditions and infrastructure accessibility.
Proper water supply systems essential for aquaculture success; dependent on pond design and climatic conditions.
Soil quality, drainage, and pH levels are important for establishing viable farming operations.

Economic Considerations

Demand and price fluctuations impact aquaculture viability, especially for low-value products like mussels.
Importance of local market access and cost-effective production methods.
The pivotal role of skilled labor and infrastructure in the success of aquaculture farms.

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Description

This quiz explores various aquaculture techniques, focusing on species such as groupers, snappers, shrimps, and lobsters. It covers essential topics like pond preparation, water management, and supplementary feeding to ensure successful fish farming. Test your knowledge of these practices and species in aquaculture.