Journal of Threatened Taxa | www.threatenedtaxa.org | 26 July 2022 | 14(7): 21453–21457

 

ISSN 0974-7907 (Online) | ISSN 0974-7893 (Print) 

https://doi.org/10.11609/jott.7075.14.7.21453-21457

#7075 | Received 12 January 2021 | Final received 20 March 2022 | Finally accepted 27 June 2022

 

 

 

First record of Garra birostris Nebeshwar & Vishwanath, 2013 (Cypriniformes: Cyprinidae) from Doyang and Dikhu rivers of Brahmaputra drainage, Nagaland, India

 

Sophiya Ezung 1, Metevinu Kechu 2 & Pranay Punj Pankaj 3

 

1–3 Department of Zoology, Fish Biology and Fisheries Lab, Nagaland University, Lumami, Nagaland 798627, India.

1 sophiezung@gmail.com, 2 metevinu06@gmail.com, 3 pranaypunj@gmail.com (corresponding author)

 

 

Abstract: Garra birostris is recorded for the first time from the Doyang and Dikhu tributaries of the Brahmaputra drainage, Nagaland, northeastern India. The detailed morphometric and meristic data of the specimens that forms the basis of this new record are presented.

 

Keywords: Freshwater fish, meristic data, northeastern India, stone suckers, taxonomy.

 

 

Editor: Rajeev Raghavan, Kerala University of Fisheries and Ocean Studies, Kochi, India. Date of publication: 26 July 2022 (online & print)

 

Citation: Ezung, S., M. Kechu & P.P. Pankaj (2022). First record of Garra birostris Nebeshwar & Vishwanath, 2013 (Cypriniformes: Cyprinidae) from Doyang and Dikhu rivers of Brahmaputra drainage, Nagaland, India. Journal of Threatened Taxa 14(7): 21453–21457. https://doi.org/10.11609/jott.7075.14.7.21453-21457

 

Copyright: © Ezung et al. 2022. Creative Commons Attribution 4.0 International License.  JoTT allows unrestricted use, reproduction, and distribution of this article in any medium by providing adequate credit to the author(s) and the source of publication.

 

Funding: (a) University Grants Commission, New Delhi; (b) Ministry of Tribal Affairs, Government of India; (c) ICAR-National Bureau of Fish Genetic Resources, Lucknow.

 

Competing interests: The authors declare no competing interests. 

 

Acknowledgements: SE & MK are grateful to the University Grants Commission, New Delhi for financial assistance for the award of UGC Non-NET fellowship, Nagaland University and scholarship for higher studies of ST students under the Ministry of Tribal Affairs, Government of India respectively. PPP gratefully acknowledges the financial support from ICAR-National Bureau of Fish Genetic Resources, Lucknow. Authors are grateful to Kailash Chandra (ZSI) for permission to examine materials and to B. Shangningam for encouragement and consent to examined type specimens under her care. Authors are also grateful to L. Kosygin (ZSI) for providing information.

 

 

 

Members of the labeonine genus Garra Hamilton, 1822 are widely distributed from Sub-Saharan Africa to Borneo through the Arabian Peninsula, southern, and southeastern Asia, and southern China (Zhang & Chen 2002). The genus Garra is diagnosed in possessing a specialized adhesive pad or modified lower lip forming a gular disc, that displays extraordinary variations in the snout (Kottelat 2020a). They can also be distinguished by their pharyngeal teeth arranged in three rows, the origin of dorsal fin which starts slightly anterior to pelvic fins, and an anal fin originating well behind the pelvic fins (Stiassny & Getahun 2007).

Northeastern India, part of the Himalaya Biodiversity Hotspot is represented by 56 nominal species of the genus Garra which are distributed in the Brahmaputra, Barak, Kaladan, Karnaphuli, and Chindwin drainages, respectively (Vishwanath 2017; Roni & Vishwanath 2018; Fricke et al. 2022). Rivers in the state of Nagaland harbour 13 species of the genus Garra—G. annandalei Hora, 1921, G. gravelyi Annandale, 1919, G. gotyla Gray, 1830, G. kempi Hora, 1921, G. lamta Hamilton, 1822, G. lissorhynchus McClelland, 1842, G. mcclellandi Jerdon, 1849, G. notata Blyth, 1861, G. naganensis Hora, 1921, G. nasuta McClelland, 1838, G. rupicola McClelland, 1839, G. chathensis Ezung, Shangningam & Pankaj, 2020 and G. langlungensis Ezung, Shangningam & Pankaj, 2021 (Ezung et al. 2020a,b,c). So far, Garra birostrisis known to occur in Arunachal Pradesh (Nebeshwar & Vishwanath 2013) and Assam (Basumatary et al. 2017) as well as in neighbouring Bhutan (Thoni et al. 2016). The present study records for the first time the occurrence of Garra birostris from two major river systems of Nagaland state—Dikhu and Doyang—are tributaries of the Brahmaputra.

 

Materials and Methods

Specimens were collected from the Doyang (26.06050N, 94.00050E) and Dikhu rivers (26.45060N, 94.70330E) of the Brahmaputra drainage, in Nagaland, India (Figure 1). Specimens were fixed in 10% formalin on site, and subsequently transferred to 70% ethanol for permanent storage. All measurements were recorded to the nearest 0.1 mm using digital calipers including the first non-zero digit from the left, through the last digit. Meristic and morphometric data followed Kottelat (2000b) and Nebeshwar & Vishwanath (2013). Gular disc terminology followed Kottelat (2020a). Meristic data were taken under a Leica M205A stereo-zoom microscope. ArcGIS tool was used to map the spatial distribution of specimens (ESRI 2017). Specimens are deposited at the Zoological Survey of India (ZSI), Kolkata and Nagaland University Fish Museum (NUFM), Nagaland.

 

Results

Specimens were identified as Garra birostris primarily based on the presence of a prominent, bilobed proboscis, bearing large, tri- to tetra-cuspid acanthoid tubercles on each lobe, a transverse lobe with small to large acanthoid tubercles, deep transverse groove, a black spot at the upper angle of gill opening and six lateral black stripes on the caudal peduncle (Image 1,2). Meristic and morphometric data are presented in Table 1. Dorsal fins with two simple and, 8½ branched rays. Pectoral fin with one simple and, 12–15 branched rays. Pelvic fin with one simple and 8 branched rays. Anal fin with two simple and 5½ branched rays. Predorsal scales 10–11. Lateral line complete with 33–34 scales. Circumpeduncular scales rows 16. Transverse scale rows above lateral line scale 4½, and, between lateral line and pelvic-fin origin 3½.

 

Distribution and Habitat

Previously known only from the rivers in Arunachal Pradesh (Nebeshwar & Vishwanath 2013), Assam (Basumatary et al. 2017), and Bhutan (Thoni et al. 2016), this study extends the distribution of the species into the Doyang and Dikhu rivers of Nagaland. Garra birostris tends to inhabit swiftly-flowing sections of headwaters and tributaries of large river systems, but also occurs in some wider, lowland river channels, as well as reservoirs. Ideal habitats comprise clear and slightly basic (pH: 7.5–8.08), oxygen-saturated water (10.02–11.38 mg/l) with a total hardness (82.39–72.52) and total dissolved solids under the desirable limits of 500 mg/l.

 

Discussion

Members of the genus Garra shows varied snout morphology (Nebeshwar & Vishwanath 2017). Garra birostris specimens collected as part of the present study belonged to group possessing a snout with proboscis (bi-lobed) and a prominent transverse lobe as described by Nebeshwar & Vishwanath (2017). Garra birostris is rheophilic cyprinid with a flat belly and the lower lip expanded at its posterior rim to form an oval sucking pad and a greatly diminished vomero-palatine organ. Garra biloborostris (Roni & Vishwanath, 2017) and Garra chathensis (Ezung et al., 2020b) are the closest congeners of Garra birostris as they belong to the ‘proboscis species-group’ with a prominent bilobed proboscis (Nebeshwar & Vishwanath 2017). The presence of large tri- or tetra-cuspid acanthoid tubercles on each lobe in G. birostris, three acanthoid tubercles on each lobe in G. biloborostris, and large bicuspid acanthoid tubercles on each lobe in G. chathensis are the most important characters distinguishing the three species.

In the present study, G. birostris was identified based on the large, tri- to tetra-cuspid acanthoid tubercles on each lobe, having 4½|1|3½ transverse scale rows and a black spot at the upper angle of the gill opening. Our specimens of G. birostris differed to a certain extent in the characters mentioned in the original description in having fewer dorsal fin ii8½ (vs iii8½) and anal fin rays ii5½ (vs iii5½) which may be to the result of differences in habitat physio-chemistry and climatic conditions.

The first record of G. birostris from Nagaland, adds yet another species to Nagaland’s ichthyofauna. This species is locally known as Aaghungu in Sumi Naga dialect, Angad in Ao Naga dialect and Engoro in Lotha Naga dialect. The prevailing threats to the fish species and their habitat occur mostly due to over exploitation including using destructive fishing methods, various anthropogenic activities hazards, such as irrigation water for human needs and plastic waste discharge, and sand & boulder mining. Public awareness campaigns among the general public could be the most effective step toward preserving and conserving native fisheries resources. Anthropogenic activities must be regulated, especially those negatively impacting aquatic ecosystems and their resources. It is also necessary to conduct continued research to investigate and document the ichthyofauna in this region, especially from poorly-explored tributaries, as to develop sustainable exploitation and for conservation plans for the fish fauna.

 

Materials examined

Garra biloborostris: ZSI FF 7928, 2 paratypes, 69.1–75.6 mm; India, Assam, Chirang District, Kanamakra River, Brahmaputra basin, Sewali and Paraty.

Garra chathensis: ZSI FF 8037, holotype, 65.6 mm SL; India: Nagaland: Chathe River, Brahmaputra basin, Ezung et al. (2020)

Garra birostris: Data from Nebeshwar & Vishwanath (2013)

 

 

Table 1. Biometric data of Garra birostris. N—number of specimens | SD—standard deviation.

River

Doyang river (n = 04)

Dikhu river (n = 05)

Locality

Liphiyan

Longleng, Yong

Altitudes

371 m

371 m

 

Range

Mean

SD

Range

Mean

SD

Standard length (mm)

52.7–80.5

 

 

113.1–138.7

 

 

In percent of standard length

Head length

24.1–27.7

25.7

1.5

23.3–25.3

24.4

0.7

Body depth at dorsal fin origin

21.1–23.4

22.2

1.0

20.1–24.9

22.7

1.7

Predorsal length

45.6–47.7  

46.4

0.9

44.5–47.4

46.1 

1.1

Preanus length

66.3–70.9

68.7 

1.9

67.4–72.8

69.4 

2.0

Preanal length

59.8–78.3

72.1 

8.3

75.1–78.2

76.1 

1.2 

Prepectoral length

21.9–46.1

28.8

11.6

19.9–23.1

21.7 

1.5

Prepelvic length

48.3–53.6

50.7 

2.2

49.1–52.3

50.5

1.2

Dorsal-fin base length

15.5–18.7

17.8 

1.5

17.1–20.1

18.8 

1.1

Dorsal-fin length

23.2–26.4

24.9 

1.3

24.1–27.7

25.3 

1.4

Pectoral-fin length

22.2–26.4

23.4 

2.0

19.3–23.7

21.9 

1.6

Pelvic-fin length

18.8–21.1

20.1 

1.0

20.1–23.1

21.7

1.2

Anal-fin base length

6.4–9.4

7.5 

1.4

7.1–10.0

8.3

1.1

Anal-fin length

18.6–20.7

19.6

1.0

20.3–22.0

21.1

0.8

Vent to anal distance

6.2–7.1

6.5 

0.4

5.4–7.1

6.4

0.6

Caudal peduncle length

14.3–20.8

18.7 

3.0

15.2–17.2

15.9 

0.7

Caudal peduncle depth

12.5–13.8 

13.1

0.6

12.3–14.1

13.1

0.6

Caudal fin length (upper lobe)

20.4–26.4

24.3

2.7

24.4–28.1

26.6

1.5

Disc length

9.5–10.8

10.1

0.6

6.3–10.5

8.4 

1.6

Disc width

11.4–13.5

12.2

0.9

9.8–13.8

12.2

1.4

Pulvinus length

6.4–6.6

6.5

0.1

3. 1–6.3

5.5

1.3

Pulvinuswidth

8.3–8.6

8.4

0.1

5. 7–9.1

8.1

1.3

In percent of head length

Head depth at occiput

59.7–75.1

68.8

6.8

67.4–72.1

69.9

1.8

Snout length

47.0–58.6

53.7

5.4

51.2–58.3

53.8

3.2

Interorbital width

33.7–44.8

41.7

5.3

37.9–43.5

41.1

2.1

Eye diameter

22.1–29.2

26.3

3.2

16.1–19.5

17.8

1.5

Disc length

37.4–41.2

39.2

1.6

26.4–43.3

34.5

6.6

Disc width

44.9–50.6

47.6

2.5

41.1–56.9

50.1

6.1

Pulvinus length

23.5–27.0

25.3

1.4

13.2–26.2

22.7

5.3

Pulvinus width

30.0–34.3

32.7

1.8

23.6–36.3

33.2

5.3

Meristic counts

N = 04

N = 05

Dorsal-fin rays

ii8½

 

ii8½

 

Pectoral-fin rays

i12–14

 

i14–15

 

Pelvic-fin rays

i8

 

i8

 

Anal-fin rays

ii5½

 

ii5½

 

Pre-dorsal scales

10–11

 

10–11

 

Lateral line scales

33–34

 

33–34

 

Transverse scales

4½|1|3½

 

4½|1|3½

 

Circumpeduncular scale rows

16

 

16

 

 

 

 

 

 

 

 

 

For figure & images - - click here (for full PDF)

 

References

 

Basumatary, S., F. Jabeen, A. Dey, H, Choudhury, B. Talukdar, H.K. Kalita & D. Sarma (2017). Length-weight relationships of Garra birostris Nebeshwar & Vishwanath, 2013, Garra annandalei (Hora, 1921), Johnius coitor (Hamilton, 1822) and Raiamas bola (Hamilton, 1822) from the Brahmaputra River basin, Northeast India. Journal of Applied Ichthyology 33(6): 1242–1243.

ESRI (2017). ArcGIS desktop and spatial analyst extension: release 10.5. Environmental Systems Research Institute; Redlands, CA.

Ezung, S., B. Shangningam & P.P. Pankaj (2021). A new fish species of genus Garra (Teleostei: Cyprinidae) from Nagaland, India. Journal of Threatened Taxa 13(6): 18618–18623. https://doi.org/10.11609/jott.6029.13.6.18618-18623  

Ezung, S., S. Bungdon & P.P. Pankaj (2020). A new fish species of the genus Garra (Teleostei: Cyprinidae) from the Brahmaputra basin, Nagaland, India. Journal of Experimental Zoology, India 23(2): 1333–1339.

Fricke, R., W.N. Eschmeyer & R. van der Laan  (2018). Eschmeyer’s Catalog of Fishes: genera, species, references, online version. California Academy of Sciences, San Francisco. Available from: http://researcharchive.calacademy.org/research/ichthyology/catalog/fishcatmain.asp  (accessed 31 December 2020).

Kottelat, M. (2020a). Ceratogarra, a genus name for Garra cambodgiensis and G. fasciacauda and comments on the oral and gular soft anatomy in labeonine fishes (Teleostei: Cyprinidae). Raffles Bulletin of Zoology Supplement No. 35: 156–178.

Kottelat, M. (2000b). Diagnoses of a new genus and 64 new species of fishes form Laos (Teleostei: Cyprinidae, Balitoridae, Bagridae, Syngnathidae, Chauhuriidae and Tetraodontidae). Journal of South Asian Natural History 5: 37–82.

Nebeshwar, K. & W. Vishwanath (2013). Three new species of Garra (Pisces: Cyprinidae) from north-eastern India and redescription of G. gotyla. Ichthyological Exploration of Freshwaters 24(2): 97–120.

Nebeshwar, K. & W. Vishwanath (2017). On the snout and oromandibular morphology of genus Garra, description of two new species from the Koladyne River basin in Mizoram, India, and redescription of G. manipurensis (Teleostei: Cyprinidae). Ichthyological Exploration of Freshwaters 28(1): 17–53.

Roni, N. & W. Vishwanath (2018). A new species of the genus Garra (Teleostei: Cyprinidae) from the Barak River drainage, Manipur, India. Zootaxa 4374(2): 263−272.

Roni, N. & W. Vishwanath (2017). Garra biloborostris, a new labeonine species from north eastern India (Teleostei: Cyprinidae). Vertebrate Zoology 67(2): 133–137.

Stiassny, M. L. & A. Getahun (2007). An overview of labeonin relationships and the phylogenetic placement of the Afro-Asian genus Garra Hamilton, 1922 (Teleostei: Cyprinidae), with the description of five new species of Garra from Ethiopia, and a key to all African species. Zoological Journal of the Linnean Society 150(1): 41–83.

Thoni, R.J., D.B. Gurung & R.L. Mayden (2016). A review of the genus Garra Hamilton 1822 of Bhutan, including the descriptions of two new species and three additional records (Cypriniformes: Cyprinidae). Zootaxa 4169(1): 115–132.

Vishwanath, W. (2017). Diversity and conservation status of freshwater fishes of the major rivers of northeast India. Aquatic Ecosystem Health & Management 20(1–2): 86–101.  https://doi.org/10.1080/14634988.2017.1294947  

Zhang, E. & Y.Y. Chen (2002). Garra tengchongensis, a new cyprinid species from the upper Irrawaddy River basin in Yunnan, China (Pisces: Teleostei). Raffles Bulletin of Zoology 50(2): 459–464.