Taxonomy of Fishes of the Genus Schizothorax Heckel with the Description of a New Species from Kumaon Himalayas

Menon, A. G. K.

doi:10.26515/rzsi/v63/i1-4/1965/161566

Cited by 3 publications

(9 citation statements)

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“…According to David [3], the main distinction between T. mahanadicus and T. mosal is the presence of small head (length of head less than body depth vs. length of head equal to body depth). Further, T. mahanadicus Meanwhile, the head and body ratio measurement of T. mahanadicus matches near T. tor from central Indian rivers, because of that Menon [4] considered Tor population form Mahanadi River (T. mahanadicus) as synonym of T. tor. However, in the present study, it is observed that T. mahanadicus differs from T. tor by many morphometric traits (Table 3): having small eye (15.3-16.9% in HL vs. 17.7-19.3%); short snout length (23.3-26.4% in HL vs. 31.4-39.8%) and presence of 2 scale rows between lateral line and pelvic-fin origin (vs. 2½scales).…”

Section: Discussionmentioning

confidence: 86%

“…The original description of morphological traits of Tor mahanadicus (= Tor mosal mahanadicus) was said to be very closely related to Tor mosal [3]. Menon [4] has pointed out that the best method to separate between Tor species is based on the head length/ body depth ratio. This was clear evidence in the case of the distinction between T. mahanadicus and T. mosal.…”

Section: Discussionmentioning

confidence: 99%

“…However, these studies did not consider other morphometric characters or additional genes, and the species status of Tor mahanadicus has been compromised with the Himalayan mahseer Tor putitora based solely on the similarity of partial mitochondrial sequence [6]. So far, the natural distribution of Tor putitora is known from the Himalayan river systems, whereas Tor mahanadicus is known only from the Mahanadi River basin in the Deccan plateau [3,4,7].…”

Section: Introductionmentioning

confidence: 99%

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Redescription of an endemic mahseer, Tor mahanadicus (David, 1953) from Mahanadi River basin, India based on integrated morphological and molecular techniques

Johnson,

Nanda,

Pant

et al. 2023

PLoS ONE

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Tor mahanadicus was originally described as Tor mosal mahanadicus with inadequate information on its morphological traits and no designated type specimen. Currently, T. mahanadicus is synonymized with Tor putitora, solely based on partial molecular data despite significant morphological differences. In this study, we performed an integrated morphological and molecular analysis to redescribe T. mahanadicus from the Mahanadi River. Tor mahanadicus is distinguished from all known Indian Tor species by the presence of 2 complete rows of scales between pelvic fin origin and lateral line, small eye (15.3–16.9% in head length), and a wide mouth gap (21.7–23.8% in head length). Moreover, it undoubtedly distinguished from the closely related species Tor putitora by having a wider body depth (26.8–28.2% in standard length vs. 14.5–19.9%), short snout length (23.3–26.4% in head length vs. 28.0–29.3%) and wide inter orbit space (30.5–37.3% in head length vs. 27.6–28.5%). Additionally, the molecular phylogenetic tree generated from a combination of three genes demonstrates a monophyletic clade separate from the Tor putitora clade. Based on the distinct morphological traits and mitochondrial gene sequences, we established Tor mahanadicus as separate species under the genus Tor.

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Section: Discussionmentioning

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Redescription of an endemic mahseer, Tor mahanadicus (David, 1953) from Mahanadi River basin, India based on integrated morphological and molecular techniques

Johnson,

Nanda,

Pant

et al. 2023

PLoS ONE

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“…Tor kulkarni (Menon, 1992) Menon (1992) described T. kulkarnii from the Dharna River which is a tributary of the river Godavari in Maharashtra, but subsequently considered as a synonym of T. khudree (Jayaram, 1999(Jayaram, , 2005(Jayaram, , 2010.…”

Section: Occurrence and Distributionmentioning

confidence: 99%

“…Tor malabaricus (Jerdon, 1849) T. malabaricus also known as the Malabar mahseer was first described from the fast-flowing hilly streams of Malabar India (Jerdon, 1849). Some taxonomists also considered it as a synonym of Deccan mahseer, T. khudree (Menon 1992, while some believe it to be a valid sub-species, T. khudree malabaricus (Indra, 1993).…”

Section: Occurrence and Distributionmentioning

confidence: 99%

The mighty mahseers of the genera Tor, Neolissochilus and Naziritor: A review on resource distribution, biology, ecotourism and conservation

Sarma¹,

Mohan²,

Posti³

et al. 2022

Indian J. Fish.

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Mahseers belonging to genus Tor, Neolissochilus and Naziritor, comprise important groups of food and sport fishes in thefreshwater eco-systems. Tor mahseers being potential game fish are recognised as cultural icon in the pristine waters acrossthe globe. They also have high nutritional value with high content of DHA, EPA and amino acids which are important tohuman health. Presently, 17 species of Tor, 25 species of Neolissochilus and 2 species of Naziritor have been reported andvalidated throughout the world. However, due to several anthropogenic and natural activities, their population is dwindlingacross most of the natural ecosystems and IUCN has categorised the group as endangered. Change in temperature andmonsoon floods triggers the act of migration and spawning behaviour of mahseers in their respective ecological conditions.There are 47 species of mahseers in the world, out of which India harbours fifteen species. These species widely occur in therocky and pristine fast flowing streams of India, China, Nepal, Sri Lanka, Myanmar, Malaysia, Thailand, Vietnam, Pakistanand Bangladesh. The present paper embodies the status of mahseers under the genera Tor, Neolissochilus and Naziritorto understand this magnificent group of fishes having extraordinary importance in terms of balancing aquatic biodiversitysustainability, creating opportunities for increasing livelihood though utilising this fish in sports (angling and ecotourism)and draws immediate attention for its conservation in inclusive and responsible manner. Keywords: Conservation, Ecotourism, GIS, Mahseer, Resource mapping

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Distribution modelling of Tor putitora (Hamilton, 1822), an endangered Cyprinid in the Himalayan river system using MaxEnt

Mahato,

Abujam,

Bushi

et al. 2024

Preprint

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Freshwater fishes are threatened by habitat modification, overfishing, pollution, invasive species, and climate change. Hence, habitat assessment using geospatial technology is essential in predicting the distribution of threatened candidates. Torputitora, an endangered game fish is declining due to indiscriminate fishing and habitat destruction. Meager attempts have been made so far to understand habitat predilection of the species. In this study, we used Maximum Entropy (MaxEnt) model with occurrence records and environmental variables. The occurrences and environmental variables were collected from survey and secondary sources and used after removing biases, multicollinearity test and contribution analysis. The model performed well with area under curve (AUC) 0.867 and true skill statistic (TSS) 0.756. The main contributing variables were upstream elevation (35.3%) and flow length (21.4%). The model predicted 10% suitable, 33% slight to moderate suitable and 57% unsuitable. So, modelling is useful in identifying river networks for conservation and eco-restoration of freshwater fishes.

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Taxonomy of Fishes of the Genus Schizothorax Heckel with the Description of a New Species from Kumaon Himalayas

Cited by 3 publications

References 0 publications

Redescription of an endemic mahseer, Tor mahanadicus (David, 1953) from Mahanadi River basin, India based on integrated morphological and molecular techniques

Redescription of an endemic mahseer, Tor mahanadicus (David, 1953) from Mahanadi River basin, India based on integrated morphological and molecular techniques

The mighty mahseers of the genera Tor, Neolissochilus and Naziritor: A review on resource distribution, biology, ecotourism and conservation

Distribution modelling of Tor putitora (Hamilton, 1822), an endangered Cyprinid in the Himalayan river system using MaxEnt

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