Overview

Distribution

Range Description

The species is endemic to Inlé Lake, Shan State, Myanmar. The extent of occurrence (EOO) is ca. 116 km², although the net open area of the lake has declined in recent decades from 69.1 km² to 46.7 km² (Sidle et al. 2007), and the area of occupancy is therefore estimated to be 46.7 km².
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Asia: Myanmar.
  • Talwar, P.K. and A.G. Jhingran 1991 Inland fishes of India and adjacent countries. vol 1. A.A. Balkema, Rotterdam. 541 p. (Ref. 4832)
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Myanmar.
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Physical Description

Size

Maximum size: 20 mm ---
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Max. size

2.0 cm TL (male/unsexed; (Ref. 4832))
  • Talwar, P.K. and A.G. Jhingran 1991 Inland fishes of India and adjacent countries. vol 1. A.A. Balkema, Rotterdam. 541 p. (Ref. 4832)
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
Inhabits midwater and margins of the lake, and associated with submerged vegetation. Aggregates in small schools.

Systems
  • Freshwater
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Environment

benthopelagic; freshwater; pH range: 7.0; dH range: 10 - 25
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Danio erythromicron

The following is a representative barcode sequence, the centroid of all available sequences for this species.


No available public DNA sequences.

Download FASTA File
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Statistics of barcoding coverage: Danio erythromicron

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 8
Specimens with Barcodes: 8
Species With Barcodes: 1
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Barcode data: Microrasbora erythromicron

The following is a representative barcode sequence, the centroid of all available sequences for this species.


No available public DNA sequences.

Download FASTA File
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Statistics of barcoding coverage: Microrasbora erythromicron

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 2
Specimens with Barcodes: 2
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
EN
Endangered

Red List Criteria
B1ab(ii,iii,v)+2ab(ii,iii,v)

Version
3.1

Year Assessed
2013

Assessor/s
Vidthayanon, C.

Reviewer/s
Kullander, S.O. & Allen, D.J.

Contributor/s

Justification
The species is only known from Inlé Lake in Myanmar, where it is impacted by introduced species of fish and a range of other threats. It is assessed as Endangered on the basis of a single location (major threat of introduced predators), restricted extent of occurrence and area of occupancy, and declining habitat quality and population size as a result of the impacts of introduced species, suspected over-harvesting for the aquarium trade, and the impacts of pollution. The area of open water in the lake has declined in recent years (Sidle et al. 2007), a situation that has been exacerbated by recent draughts (Htwe 2010). If the trend continues the species may qualify for a higher threat category.

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Population

Population
The species is the least common in catches of small fishes. The population is inferred to be decreasing.

Population Trend
Decreasing
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Threats

Major Threats
This fish is regularly harvested for aquarium trade, which may have an impact on its population. The introduction of non-native (to the lake) fish species, including farmed species (e.g., the larger Parambassis spp.) and tilapine fish are the major threats, both as as predator and competitor. Some of the introduced native fishes access the lake as a result of raised water levels from the downstream dam.

Pollution from a range of sources impacts the lake; sedimentation and agricultural pollution from the surrounding drainage, as well as direct pollution inputs from the growing human settlements around the lake. It is possible that the agro-chemical pollution may impact the submerged vegetation habitat of the species, but this requires confirmation.
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Endangered (EN) (B1ab(ii,iii,v)+2ab(ii,iii,v))
  • IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
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Management

Conservation Actions

Conservation Actions
Research into pollution trends and impact of known threats needed. Site-based conservation actions are required.
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Wikipedia

Danio erythromicron

Danio erythromicron, often known as emerald dwarf rasbora, is a species of cyprinid fish which is endemic to Inle Lake in Myanmar.

Taxonomy and systematics[edit]

In 1999, it was suggested that the species be transferred to the genus Danio based on morphological data, but it was cautioned that more research would be necessary.[3] A phylogenetic analysis of Danio found it indeed close to that genus, but its precise placement was still indeterminable.[4] Shortly thereafter, a new species, Danio margaritatus, was described under the name Celestichthys margaritatus.[5] However, this new species was quickly moved into Danio following further analysis.[6] Subsequent analysis of DNA sequence data showed that Microrasbora erythromicron was related to Danio, and recommended moving this species to that genus.[7] Later molecular analysis confirmed its placement within the genus, with its closest relatives being Danio margaritatus and Danio choprai.[8]

See also[edit]

References[edit]

  1. ^ Annandale, N. (1918-05-09). "Fish and fisheries of the Inlé Lake". Records of the Indian Museum (Calcutta) 14: 33–64. 
  2. ^ "Synonyms list". FishBase. Retrieved 3 April 2013. 
  3. ^ Kottelat, M. & Witte, K.E. (1999): Two new species of Microrasbora from Thailand and Myanmar, with two new generic names for small Southeast Asian cyprinid fishes (Teleostei: Cyprinidae). Journal of South Asian Natural History 4(1): 49-56.
  4. ^ Fang, Fang (2003): Phylogenetic Analysis of the Asian Cyprinid Genus Danio (Teleostei, Cyprinidae). Copeia 2003(4): 714–728. DOI:10.1643/IA03-131.1 HTML abstract
  5. ^ Roberts, Tyson R. (2007): The "Celestial pearl danio", a new genus and species of colourful minute cyprinid fish from Myanmar (Pisces: Cypriniformes). Raffles Bulletin of Zoology 55(1): 131-140. PDF fulltext
  6. ^ Conway, K. W., Chen, W.-J. & Mayden, R. L. (2008). The ‘Celestial Pearl Danio’ is a miniature Danio (s.s) (Ostariophysi: Cyprinidae): evidence from morphology and molecules. Zootaxa, 1686, 1–28.
  7. ^ Mayden, Richard L.; Tang, Kevin L.; Conway, Kevin W.; Freyhof, Jörg; Chamberlain, Sarah; Haskins, Miranda; Schneider, Leah; Sudkamp, Mitchell; Wood Robert M.; Agnew, Mary; Bufalino, Angelo; Sulaiman, Zohrah; Miya, Masaki; Saitoh, Kenji & He, Shunping (2007): Phylogenetic relationships of Danio within the order Cypriniformes: a framework for comparative and evolutionary studies of a model species. Journal of Experimental Zoology B: Molecular and Developmental Evolution 308B(5): 1-13. doi:10.1002/jez.b.21175 PMID 17554749 (HTML abstract)
  8. ^ Fang, F., Norén, M., Liao, T. Y., Källersjö, M. & Kullander, S. O. 2009. Molecular phylogenetic interrelationships of the south Asian cyprinid genera Danio, Devario, and Microrasbora (Teleostei, Cyprinidae, Danioninae). Zoologica Scripta 38:237-256.
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