Rohu_fish-_Kurriro,_Danbiro_Machi_of_Indus_River

The rohu, rui, ruhi or roho labeo (''Labeo rohita'') is a species of fish of the carp family, found in rivers in

South Asia South Asia is the southern subregion of Asia, which is defined in both geographical Geography (from Greek: , ''geographia''. Combination of Greek words ‘Geo’ (The Earth) and ‘Graphien’ (to describe), literally "earth descr ...

. It is a large omnivore and extensively used in aquaculture.

Description

The rohu is a large, silver-colored fish of typical

cyprinid Cyprinidae is a family of freshwater fish commonly called the carp or minnow family. It includes the carps, the true minnows, and relatives like the barbs and barbels. Cyprinidae is the largest and most diverse fish family and the largest ver ...

shape, with a conspicuously arched head. Adults can reach a maximum weight of and maximum length of , but average around .

Distribution and habitat

The rohu occurs in rivers throughout much of northern and central and eastern

India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...

Pakistan Pakistan ( ur, ), officially the Islamic Republic of Pakistan ( ur, , label=none), is a country in South Asia. It is the world's fifth-most populous country, with a population of almost 243 million people, and has the world's second-lar ...

Vietnam Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making i ...

Bangladesh Bangladesh (}, ), officially the People's Republic of Bangladesh, is a country in South Asia. It is the eighth-most populous country in the world, with a population exceeding 165 million people in an area of . Bangladesh is among the mos ...

Nepal Nepal (; ne, :ne:नेपाल, नेपाल ), formerly the Federal Democratic Republic of Nepal ( ne, सङ्घीय लोकतान्त्रिक गणतन्त्र नेपाल ), is a landlocked country in S ...

and

Myanmar Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only some British English speakers pronounce r at the end of syllables. As John Wells explai ...

, and has been introduced into some of the rivers of Peninsular India and Sri Lanka.

Ecology

The species is an omnivore with specific food preferences at different life stages. During the early stages of its lifecycle, it eats mainly

zooplankton Zooplankton are the animal component of the planktonic community ("zoo" comes from the Greek word for ''animal''). Plankton are aquatic organisms that are unable to swim effectively against currents, and consequently drift or are carried along by ...

, but as it grows, it eats more and more phytoplankton, and as a juvenile or adult is a herbivorous column feeder, eating mainly phytoplankton and submerged vegetation. It has modified, thin hair-like

gill rakers Gill rakers in fish are bony or cartilaginous processes that project from the branchial arch (gill arch) and are involved with suspension feeding tiny prey. They are not to be confused with the gill filaments that compose the fleshy part of t ...

, suggesting that it feeds by sieving the water. Rohu reach sexual maturity between two and five years of age. They generally spawn during the

monsoon A monsoon () is traditionally a seasonal reversing wind accompanied by corresponding changes in precipitation but is now used to describe seasonal changes in atmospheric circulation and precipitation associated with annual latitudinal osci ...

season, keeping to the middle of flooded rivers above tidal reach. The spawning season of rohu generally coincides with the southwest monsoon. Spawn may be collected from rivers and reared in tanks and lakes.

Aquaculture

The rohu is an important aquacultured freshwater species in South Asia. When cultured, it does not breed in

lake ecosystem A lake ecosystem or lacustrine ecosystem includes biotic (living) plants, animals and micro-organisms, as well as abiotic (non-living) physical and chemical interactions. Lake ecosystems are a prime example of lentic ecosystems (''lentic'' ref ...

s, so induced spawning is necessary. The rohu is also prized as a game fish.

Preparation as food

Rohu is very commonly eaten in

and the

n states of

Tripura Tripura (, Bengali: ) is a state in Northeast India. The third-smallest state in the country, it covers ; and the seventh-least populous state with a population of 36.71 lakh ( 3.67 million). It is bordered by Assam and Mizoram to the ea ...

Nagaland Nagaland () is a landlocked state in the northeastern region of India. It is bordered by the Indian states of Arunachal Pradesh to the north, Assam to the west, Manipur to the south and the Sagaing Region of Myanmar to the east. Its capital cit ...

Bihar Bihar (; ) is a state in eastern India. It is the 2nd largest state by population in 2019, 12th largest by area of , and 14th largest by GDP in 2021. Bihar borders Uttar Pradesh to its west, Nepal to the north, the northern part of West ...

Odisha Odisha (English: , ), formerly Orissa ( the official name until 2011), is an Indian state located in Eastern India. It is the 8th largest state by area, and the 11th largest by population. The state has the third largest population of ...

Assam Assam (; ) is a state in northeastern India, south of the eastern Himalayas along the Brahmaputra and Barak River valleys. Assam covers an area of . The state is bordered by Bhutan and Arunachal Pradesh to the north; Nagaland and Manipur ...

West Bengal West Bengal (, Bengali: ''Poshchim Bongo'', , abbr. WB) is a state in the eastern portion of India. It is situated along the Bay of Bengal, along with a population of over 91 million inhabitants within an area of . West Bengal is the fou ...

Andhra Pradesh Andhra Pradesh (, abbr. AP) is a state in the south-eastern coastal region of India. It is the seventh-largest state by area covering an area of and tenth-most populous state with 49,386,799 inhabitants. It is bordered by Telangana to the ...

Tamilnadu Tamil Nadu (; , TN) is a state in southern India. It is the tenth largest Indian state by area and the sixth largest by population. Its capital and largest city is Chennai. Tamil Nadu is the home of the Tamil people, whose Tamil language— ...

and

Uttar Pradesh Uttar Pradesh (; , 'Northern Province') is a state in northern India. With over 200 million inhabitants, it is the most populated state in India as well as the most populous country subdivision in the world. It was established in 1950 ...

. A recipe for fried Rohu fish is mentioned in ''

Manasollasa The ' also known as ''Abhilashitartha Chintamani'', is an early 12th-century Sanskrit text composed by the Kalyani Chalukya king Someshvara III, who ruled in present-day Karnataka . It is an encyclopedic work covering topics such as polity, gove ...

'', a 12th-century Sanskrit encyclopedia compiled by

Someshvara III Someshvara III (; ) was a Western Chalukya king (also known as the Kalyani Chalukyas), the son and successor of Vikramaditya VI. He ascended the throne of the Western Chalukya Kingdom in 1126 CE, or 1127 CE. Someshvara III, the third king in t ...

, who ruled from present-day

Karnataka Karnataka (; ISO: , , also known as Karunāḍu) is a state in the southwestern region of India. It was formed on 1 November 1956, with the passage of the States Reorganisation Act. Originally known as Mysore State , it was renamed ''Karnat ...

. In this recipe, the fish is marinated in

asafoetida Asafoetida (; also spelled asafetida) is the dried latex ( gum oleoresin) exuded from the rhizome or tap root of several species of ''Ferula'', perennial herbs growing tall. They are part of the celery family, Umbelliferae. Asafoetida is th ...

and salt after being skinned. It is then dipped in turmeric mixed in water before being fried. Rohu caught in

Mithila Mithila may refer to: Places * Mithilā, a synonym for the ancient Videha state ** Mithilā (ancient city), the ancient capital city of Videha * Mithila (region), a cultural region (historical and contemporary), now divided between India and Nepal ...

are known as Mithila Rohu Machh (Maithili: मिथिला रोहु माछ) and considered tastier than the Rohu varieties found in the coastal areas. The

State government is currently making efforts to establish a List of geographical indications in India (GI) tag for the fish.

Nutrition

Rohu is rich in

Omega 3 fatty acids Omega−3 fatty acids, also called Omega-3 oils, ω−3 fatty acids or ''n''−3 fatty acids, are polyunsaturated fatty acids (PUFAs) characterized by the presence of a double bond, three atoms away from the terminal methyl group in their chem ...

Vitamin A Vitamin A is a fat-soluble vitamin and an essential nutrient for humans. It is a group of organic compounds that includes retinol, retinal (also known as retinaldehyde), retinoic acid, and several provitamin A carotenoids (most notably ...

Vitamin B B vitamins are a class of water-soluble vitamins that play important roles in cell metabolism and synthesis of red blood cells. Though these vitamins share similar names (B1, B2, B3, etc.), they are chemically distinct compounds that often coex ...

and

Vitamin C Vitamin C (also known as ascorbic acid and ascorbate) is a water-soluble vitamin found in citrus and other fruits and vegetables, also sold as a dietary supplement and as a topical 'serum' ingredient to treat melasma (dark pigment spots) ...

. It is also rich in Vitamin D, a Vitamin which is present only in a few foods and consumption of the fish will prevent Osteoporosis, a Vitamin D deficiency disease.

References

{{Taxonbar, from=Q311727 Cyprinid fish of Asia Fish of Thailand Fish described in 1822 Labeoninae Fish of Bangladesh