Sharma and Sharma (1998) also reported G-bands in … (i) The first or mandibular arch forms the jaws. Trunk vertebrae are 21 in number. Which of the following is not an attribute of a population ? Identify the parts labelled A, B, C, D, E, F, G. (A) A = Nostril, B = eye, C = Anal fin, D = Ca The posterior end of the caudal region is enormously modified for the support of the tail fm. Mass production of intergeneric hybrid catla (Catla catla x Labeo rohita) and its growth in ponds, small and large reservoirs of Madhya Pradesh. Our mission is to provide an online platform to help students to discuss anything and everything about Zoology. This study was performed to identify individual chromosomes on morphological basis and to characterize a standard karyotype using the fish, Rohu (Labeo rohita, … The radials articulate with the scapula. Exoskeleton of Rohu Fish (Labeo rohita) comprises scales and fin-rays. Labeo rohita is commonly known as rui, rohit, rohu belongs to family Cyprinidae, Cypriniformes. Indian major carp, Labeo rohita (Hamilton-Buchanan, 1822), commonly known as ‘rohu’ belongs to the family Cyprinidae is available in lakes, ponds, rivers and other water bodies of India and adjacent countries . To cite this page: Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. Match the following columns and select the correct option. Sarower-E-Mahfuj M, Hossain MB, Rahman MM, Hoshan MI. Both these bones bear many teeth. Chromosomal and karyotypic studies are required for genetic improvement of any organisms. Rohu (Labeo rohita) is the most important among the three Indian major carp species used in carp polyculture systems. Scales are cycloid type which are thin overlapping bony plates, partly covered by skin. It does not matter whether you eat sea fish or river fish, the benefits of eating this type of seafood are immense. It has every high food value and commercial importance. Rohu fish belongs to the family of “Cyprinidae” and genus of “Labeo”. Each half is formed of large, flat bone, the pelvic bone (basipterygium), lying in the middle line in the ventral body wall. The nasals articulate with the posterolateral sides of the mesethmoid and form the roof of the olfactory capsules. KCET 2010: The diagram of Labeo rohita is given below. lase, amylase, maltase, invertase, protease and lipase in the digestive tracts of Labeo rohita fingerlings. The low neural arches arise from the latero-dorsal surface of the centrum and fuse in the middle to form a long, slender neural spine directed upwards and backwards. It is thick in mid region. All these bones bear no teeth. They are more numerous than the centra, and three or four haemal arches are attached to the urostyle. External Structures of Rohu: The Rohu fish has a spindle-shaped body measuring up to 1 m in length and weighing about 20-25. kg. Suspensorium is formed of two bones, the hyomandibular and symplectic. Skull of Labeo (Fig. The posterior rod-like parts of both the halves are united in the mid-line. Learn Biology by Suraiya AkterAssistant Teacher - BSISC#####Enjoy and stay connected with us ! Physics. The diagram of Labeo rohita is given below. The pectoral fin is supported by nineteen lepidotrichia which are attached with four somactidia (radials). Biology. These pieces are the two anterior most elements of Weberian apparatus. It is divisible into an anterior or trunk region and a posterior caudal region. Embedded in this ligament is a small bone with a backwardly directed spinous process, which is called interclarium. The vertebral column is differentiated into distinct bony vertebrae. First three branchial arches are composed of pharyngobranchial above, then epibranchial, then a large ceratobranchial, and a small hypobranchial below. It is a large omnivore and extensively used in aquaculture. The sabre-shaped branchiostegal rays are attached along the posterior border of the epi- and ceratohyal. Fin-rays are fin-supporting structures. (iii) A mesocoracoid situated above the coracoid and anterior to the scapula. The cranium and sense capsules are firmly united together. Small spine-like ossifications are attached in a single or double row along the inner aspect of each of the first four arches. All these bones form an inverted cup-like structure that lodges the internal ear. The cranium of Labeo rohita is divided into four regions: It forms the anterior part of the cranium and is formed of paired nasals, ectoethmoids, lacrymals and unpaired median mesethmoid, vomer and rostral. Before publishing your Notes on this site, please read the following pages: 1. The body is spindle-shaped, laterally flattened, dark greenish-black in color. However, instead of remaining cartilaginous, it is ossified by three replacing bones. In the occipital region are four bones. Comparative genomics of rohu (A) Venn diagram showing orthologous gene clusters among four diploid cyprinids, Labeo rohita, Anabarilius grahami, Ctenopharyngodon idellus, and Danio rerio. The ectoethmoids also take part in the formation of olfactory capsules. is the natural inhabitant of the re-verine system of Northern and Central India. Saikat Biswas, Arun G. Jadhao, Claudia Pinelli, Nikhil V. Palande, Kazuyoshi Tsutsui. 15.7) is placed anterior to anal fin, at the level of cloaca. The process of growth is maximum during : Plasma is red and nucleated, colourless RBC, Adult with radial symmetry and larva with bilateral symmetry. According to Boyle's law, the product of pressure and volume is a constant. In the last 3 or 4 trunk vertebrae the parapophyses are fused. The caudal fin (D) is the tail fin located at the end of the caudal peduncle and is used for propulsion. In front of auditory region the cranium is excavated on each side by a large orbit. In: P. Keshavanath & K.V. In between scaphium and tripus is present a stout ligament. This website includes study notes, research papers, essays, articles and other allied information submitted by visitors like YOU. In the adult notochordal canal becomes closed. The toothed palatine lies in front, articulating with the olfactory capsule. Figure 1. Anal fin has a series of eight fin rays supported by seven somactidia. The indigenous major carps are Catla catla, Labeo rohita and Cirrhinus mrigal, apart from these varieties C.reba and Labeo calbasu are also economically viable. Drawing Page 01: Labelled diagram of External Feature of Labeo rohita. Externally to these is a very large investing bone, the cleithrum, extending downwards under the throat. Catla catla is the fastest growing Indian major carp amongst fin fishes. In the embryonic stage the concavities are communicated by a narrow notochordal canal perforating the centrum. Choose the correct answer. The visceral arches are loosely attached with the skull. Labeo Rohita In Mustard Sauce, And Stir-Fried Greens On The Side Of all the things I anticipated eating by being a Bengali is fish. The adults are chiefly herbivorous in diet. The neural arches arising from the centrum are fused dorsally to form long, backwardly directed neural spine. It forms the posterior most part of the skull. In Rohu fish (Labeo rohita), the dermotrichia or lepidotrichia which lie in the substance of the fin are slender bones, jointed together and mostly branched. In which of the following situations, is there a risk factor for children of incurring Erythroblastosis foetalis? 9 (1/8); A. Its distal end is connected by means of a supraclavicle to a forked bone, the post temporal, one branch of which articulates with the epiotic and the other with the pterotic process. Around focus there are concentric rows of ridges called circulii which are used to count the age of fishes. The hindmost centra have their axes deflected upwards and the last centrum is rod-like structure, the urostyle. Lakra and Krishna (1994) reported G-banded karyotypes in Indian major carps. Labeo rohita (rohu) is the most preferred species for polyculture among the Indian major carps. In the caudal vertebrae the centrum is amphicoelous. Caudal fin is supported by a number of flattened bony rods. Asian Fishery Society Indian Branch, Mangalore, India. Though digestive enzyme activity has been estimated in the gastrointestinal tract of Indian major carps [8-12], there is no literature on their activities in different size groups and segments of the digestive tract. All these segments are ossified by replacing bones. The Fecundity of the Rohu, Labeo rohita (Hamilton) 219 that the relationship was statistically significant (t = 22.510 > 1.96 at 5 ~o). Like pectoral girdle, it is also formed of two similar halves. The fifth arch is reduced to a single bone on each side. Match the animals listed in Column I with their of nature of blood listed in Column II. Which of the following animals has a tetramorphic colony ? In which of the following techniques, the embryos are transferred to assist those females who cannot conceive ? It is formed of a palato-pterygoquadrate which forms the upper jaw and a Meckel’s cartilage that forms the lower jaw in the embryonic stage. Rohita Valenciennes, 1842; Rohitichthys Bleeker, 1860; Tambra Bleeker, 1860; Labeo is a genus of carps in the family Cyprinidae. Each pelvic fin is supported by nine lepidotrichia or fin rays and three somactidia or radials. The skull is divided into cranium enclosing the brain with paired olfactory, optic and auditory capsules for the respective sense organs and the visceral or branchial arches. It is palatable and is liked by the Indian population (Figs. Labeo rohita (Rohu) is the most important among the three Indian major carp species used in polyculture systems. Genus-Labeo. Choose the correct pair from the following. Dorsal fin is a fin located at the back of Labeo (C). Indian J. Mouth shape and tooth structure vary greatly in fishes, depending on the kind of food normally eaten. 24.1 and 24.2a-c). TOS4. The neural and haemal spines of the last five vertebrae are very broad and closely connected with one another. Pelvic girdle (Fig. Labeo calbasu Shaw and Shebbeare, 1937. Common name: Kalbasu, Black rohu. Labeo Rohita (Rohu): It is found in clear and sluggish rivers and streams. (B) Synteny conservation between rohu and zebrafish using Symap. Indian. Labeo is a freshwater bony fish found in lakes, ponds, and rivers. This Indo-Gangetic riverine sps. Assign the stamens to their respective plants. Mrigal Cirrhinus cirrhosus is known as mirka, one of the common members of major carps in Bangladesh found in the rivers, canals and floodplains. A vertical plate or inter-orbital septum separates the two cavities from one another. 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