QUIZ 109- 18/4 (solution)

QUIZ 109 - 18/4 (solution)

1. What is the name of the reservoir famous for its large catfish fishery? 

• Gobind sagar

source - wikipedia

Gobind Sagar Reservoir is a large man-made reservoir located in the state of Himachal Pradesh, India. It is formed by the Bhakra Dam on the Sutlej River and is a popular destination for fishing enthusiasts.

Catla (scientific name: Catla catla) is a popular freshwater fish species in India and is widely cultured in ponds and reservoirs. The Gobind Sagar Reservoir is known to support a good population of Catla fish, making it a potential site for Catla fisheries.

2.  Name of the shallowest reservoir?

• vidur

source - indianetzone

Vidur reservoir is the shallowest of all reservoirs in Tamil Nadu. The average depth of this reservoir is 2.1 m. This reservoir is a moderate preserver of plankton community.

3.  Name the species which are caught by jig line fishing?

• squid

source - saltycape

Squid can also be caught using a jigging technique, commonly known as "squid jigging". Squid jigs are specialized jigs that are designed to mimic the movement of small baitfish, which are a common prey item for squid.

Some of the common species of squid that can be caught using jigging techniques include:

• California market squid(Loligo opalescens)
• Japanese flying squid (Todarodes pacificus)
• European squid (Loligo vulgaris)
• Southern calamari (Sepioteuthis australis)

These species are commonly targeted by commercial and recreational fishermen using jigging techniques, particularly in regions where squid are abundant. Squid jigging can be done from a boat or from shore, and involves jigging the lure up and down in the water column to attract the attention of the squid.

4.  Name which is an indigenous major carp?

• gangetic carp

The Gangetic carp, also known as the Indian major carp, is a group of freshwater fish species native to the Indian subcontinent. These carp are an important source of food and income for many people in the region, and are commonly found in rivers, lakes, and other freshwater habitats.

There are several species of Gangetic carp, including:

• Rohu (Labeo rohita)
• Catla (Catla catla)
• Mrigal (Cirrhinus mrigala)

These carp species are popular for their meat, which is white, firm, and has a mild flavor. They are also commonly used for aquaculture, and are farmed in ponds and reservoirs throughout the region. The Gangetic carp is an important part of the freshwater ecosystem in India, and efforts are being made to conserve and manage their populations to ensure their sustainability for future generations.

5. Net for bombay duck in gujarat cost is called?

• dol

Monalisha Devi, S. (2019) Dol net fishery of India: Need for resource conservation. 

Dol net is a fixed tapering bag net which resembles a trawl net which are set in tidal streams and the net is held in place by attaching it to anchors. Dol netting is a very popular traditional, passive technique of fishing practiced along the north-west coast of India, in the states of Gujarat and Maharashtra. Dolnets were operated at a maximum depth of 20-24m which were close to the shore prior to mechanisation, but after mechanization of the crafts fishermen now set their nets at depths of 40m. Traditionally the Dolnet fabrication was using cotton twine, which were heavy and cumbersome which are now replaced by HDPE, which made the gears light, durable and also helped in easy deployment by the fishers. Dol nets are classified on the basis of the method and depth of their operation. The simplicity of its design, construction, operation and low investment has made this gear very popular among small-scale fishermen.

6. Which of the following contributed to Oxbow Lake's formation?

• river activity

source - wikipedia

Oxbow lakes are a type of landform that is formed by the natural process of erosion and deposition in river systems. They are typically formed when a meandering river erodes the outer banks of a bend, causing the channel to become wider and the bend to become more pronounced. Over time, the erosion causes the neck of the meander to become narrower, until the river breaks through and creates a new, straighter channel. This leaves a crescent-shaped body of water, which is the oxbow lake.

Thus, the natural process of erosion and deposition in river systems is the primary factor that contributes to the formation of oxbow lakes. Other factors such as changes in river flow and the presence of sediment can also play a role in the formation of oxbow lakes.

7.  Which is the largest ocean?

• pacific

source - wikipedia

The largest ocean on Earth is the Pacific Ocean. It covers an area of about 63.8 million square miles (165.25 million square kilometers), which is about one-third of the Earth's surface and larger than the total land area on Earth. The Pacific Ocean is surrounded by the continents of Asia and Australia to the west, and the Americas to the east. The ocean is named after the Latin word "pacificus," which means peaceful, due to its relatively calm waters. The Pacific Ocean is home to a vast array of marine life, including numerous species of fish, whales, dolphins, and sea turtles.

8.  Which is the boilling point of liquid ammonia?

• -33c

The boiling point of liquid ammonia is -33.34°C or -28.012°F at standard atmospheric pressure of 1 atm. Ammonia (NH3) is a colorless gas at room temperature, but it can be easily liquefied under pressure. It is commonly used in the chemical industry as a refrigerant, as well as in the production of fertilizers, plastics, and other products.

9.  Which is the bacterial flora of fresh water fishes?

• gram positive

10.  Which is the beautiful gardens of the sea?

• coral reefs

source - national geographic

The "beautiful gardens of the sea" is a term commonly used to refer to coral reefs. Coral reefs are diverse underwater ecosystems made up of colonies of tiny animals called coral polyps. They are often described as "gardens" because of their vibrant and colorful appearance, which is created by the many different species of coral, fish, and other marine organisms that inhabit them. Coral reefs are some of the most biologically diverse ecosystems on the planet, and are home to countless species of fish, invertebrates, and other marine life. They also play a vital role in protecting coastlines from erosion and storms, and in supporting the livelihoods of millions of people around the world who depend on them for food, tourism, and other economic activities.

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