Overview

Comprehensive Description

Biology

Found on rich coral reefs, also on rubble and rocky areas. Adults in pairs, juveniles solitary. Closely related to C. vagabundus (Ref. 48636). Home ranging (Ref. 90102). Feeds largely on algae and coral polyps, but captive ones will accept a wide variety of food. Oviparous (Ref. 205). Form pairs during breeding (Ref. 205). Excellent aquarium fish.
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Distribution

Range Description

This species is distributed from the northwestern Indian Ocean to Thailand and southeast Indonesia as far east as Timor (Pyle 2001). Records include Oman, Sri Lanka, the Maldive Islands and Ashmore Reef (Ashmore and Cartier Islands, Australia) in the Timor Sea (G.R. Allen pers. comm. 2006). It is found at depths of 1-40 m.
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Indo-West Pacific: Maldives, India, Sri Lanka, Andaman Sea and the westernmost portion of the Indo-Malayan Archipelago.
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Indo-West Pacific.
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Physical Description

Morphology

Dorsal spines (total): 13; Dorsal soft rays (total): 24 - 25; Analspines: 3; Analsoft rays: 20 - 21
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Size

Maximum size: 200 mm ---
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Max. size

20.0 cm TL (male/unsexed; (Ref. 4858))
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Diagnostic Description

Description: Most of dorsal fin black and caudal fin with black vertical bands (Ref. 48636). Snout length 2.8-3.4 in HL. Body depth 1.4-1.7 in SL (Ref. 90102).
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
This species inhabits rocky, rubble or coral-rich areas, and is particularly common in turbid water (Allen 1980). It is a benthic feeder, and occasionally feeds from live corals (Allen 1980, G.R. Allen pers. comm. 2006).

Systems
  • Marine
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Depth range based on 2 specimens in 1 taxon.
Water temperature and chemistry ranges based on 1 sample.

Environmental ranges
  Depth range (m): 7 - 8.5
  Temperature range (°C): 28.340 - 28.340
  Nitrate (umol/L): 1.008 - 1.008
  Salinity (PPS): 34.713 - 34.713
  Oxygen (ml/l): 4.482 - 4.482
  Phosphate (umol/l): 0.279 - 0.279
  Silicate (umol/l): 4.150 - 4.150

Graphical representation

Depth range (m): 7 - 8.5
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
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Environment

reef-associated; marine; depth range 1 - 30 m (Ref. 9710)
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Depth range based on 2 specimens in 1 taxon.
Water temperature and chemistry ranges based on 1 sample.

Environmental ranges
  Depth range (m): 7 - 8.5
  Temperature range (°C): 28.340 - 28.340
  Nitrate (umol/L): 1.008 - 1.008
  Salinity (PPS): 34.713 - 34.713
  Oxygen (ml/l): 4.482 - 4.482
  Phosphate (umol/l): 0.279 - 0.279
  Silicate (umol/l): 4.150 - 4.150

Graphical representation

Depth range (m): 7 - 8.5
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Depth: 1 - 30m.
From 1 to 30 meters.

Habitat: reef-associated. Found on rich coral reefs, also on rubble and rocky areas. Feeds largely on algae and coral polyps, but captive ones will accept a wide variey of food. Excellent aquarium fish.
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Trophic Strategy

Occurs inshore (Ref. 75154). Found on rich coral reefs, also on rubble and rocky areas. Feeds largely on algae and coral polyps.
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Diseases and Parasites

Hurleytrematoides Infestation 11. Parasitic infestations (protozoa, worms, etc.)
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Life History and Behavior

Life Cycle

Form pairs during breeding (Ref. 205).
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Chaetodon decussatus

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


There are 11 barcode sequences available from BOLD and GenBank.

Below is a sequence of the barcode region Cytochrome oxidase subunit 1 (COI or COX1) from a member of the species.

See the BOLD taxonomy browser for more complete information about this specimen and other sequences.

CTCTATCTAGTATTTGGTGCTTGAGCTGGGATAGTAGGAACTGCCCTA---AGTCTGCTCATTCGAGCAGAGCTCAGCCAACCAGGCTCCCTCCTGGGCGAC---GACCAGATCTATAATGTAATTGTTACAGCGCATGCATTCGTAATAATTTTCTTTATAGTAATACCAATTATGATTGGAGGGTTCGGAAACTGACTGATTCCTCTAATG---ATTGGAGCCCCAGATATGGCCTTCCCTCGGATGAACAATATGAGCTTTTGGCTCCTGCCCCCCTCCTTTTTCCTACTCCTTGCCTCTTCTGGTGTAGAGTCCGGGGCTGGTACTGGATGAACGGTTTATCCCCCGCTAGCTGGCAACCTAGCACACGCCGGAGCATCCGTTGATCTA---ACCATCTTCTCCCTCCACCTCGCAGGAGTTTCCTCCATCCTTGGGGCAATTAATTTCATCACAACAATTCTCAACATGAAGCCCCCTGCCATGTCTCAGTACCAAACCCCTCTTTTCGTGTGATCTGTTTTAATTACAGCCGTCCTGCTTCTCCTATCCCTGCCTGTTCTTGCAGCC---GGGATTACAATACTCCTTACAGATCGAAACCTCAATACAACCTTTTTTGACCCCGCAGGAGGAGGCGACCCTATTCTGTACCAACACCTG
-- end --

Download FASTA File

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Statistics of barcoding coverage: Chaetodon decussatus

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 11
Specimens with Barcodes: 16
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2010

Assessor/s
Myers, R. & Pratchett, M.

Reviewer/s
Elfes, C., Polidoro, B., Livingstone, S. & Carpenter, K.E.

Contributor/s

Justification
This species is common and relatively widespread. There do not appear to be any major threats to this species. It is listed as Least Concern.
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Population

Population
It is generally common, especially on reefs in Sri Lanka (Allen 1980). There is no evidence of species declines.

Population Trend
Stable
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Threats

Major Threats

There appear to be no major threats to this species. Collection is limited and is not considered to be impacting the global population.

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Least Concern (LC)
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Management

Conservation Actions

Conservation Actions
There appear to be no species-specific conservation measures in place. This species is believed to be present within marine protected areas.
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Relevance to Humans and Ecosystems

Benefits

Importance

aquarium: commercial
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Wikipedia

Indian vagabond butterflyfish

The Indian Vagabond Butterflyfish, Chaetodon decussatus, is a species of butterflyfish (family Chaetodontidae). It is found in the Indo-West Pacific, from the Maldives via India, Sri Lanka and the Andaman Sea to the westernmost portion of the Indonesian archipelago.[2]

Growing to a maximum of 20 cm (nearly 8 in) long, it is found on rich coral reefs and also on rubble and rocky areas. The monogamous adults swim in pairs and may be territorial and aggressive to other Chaetodon; juveniles are solitary. The Indian Vagabond Butterflyfish feeds largely on algae and coral polyps. They are oviparous.[2]

It belongs to the large subgenus Rabdophorus which might warrant recognition as a distinct genus. In this group, it almost certainly is a rather close relative of the Threadfin Butterflyfish (C. auriga) and the Vagabond Butterflyfish (C. vagabundus). C. decussatus might be closer to the Threadfin Butterflyfish than to the common Vagabond Butterflyfish; as C. vagabundus has yielded abnormal DNA sequence data this is hard to say however. The C. auriga species group shares the characteristic pattern of two areas of ascending and descending oblique lines; species differ conspicuously in hindpart coloration.[3]

Footnotes[edit source | edit]

  1. ^ Myers, R. & Pratchett, M. 2010. Chaetodon decussatus. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.1. <www.iucnredlist.org>. Downloaded on 10 September 2013.
  2. ^ a b FishBase [2008]
  3. ^ Fessler & Westneat (2007), Hsu et al. (2007)

References[edit source | edit]

  • Fessler, Jennifer L. & Westneat, Mark W. (2007): Molecular phylogenetics of the butterflyfishes (Chaetodontidae): Taxonomy and biogeography of a global coral reef fish family. Mol. Phylogenet. Evol. 45(1): 50–68. doi:10.1016/j.ympev.2007.05.018 (HTML abstract)
  • FishBase [2008]: Chaetodon decussatus. Retrieved 2008-SEP-01.
  • Hsu, Kui-Ching; Chen, Jeng-Ping & Shao, Kwang-Tsao (2007): Molecular phylogeny of Chaetodon (Teleostei: Chaetodontidae) in the Indo-West Pacific: evolution in geminate species pairs and species groups. Raffles Bulletin of Zoology Supplement 14: 77-86. PDF fulltext
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