Overview

Comprehensive Description

Biology

Inhabit shallow reef flats (Ref. 205). Benthopelagic (Ref. 58302). Form schools at midwater to feed on plankton and benthic invertebrates. Also on shallow seamounts. Oviparous. Form pairs during breeding (Ref. 205).
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Distribution

Eastern Central Pacific: Johnston Island (Ref. 11013) and Hawaii.
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Range Description

This species is endemic to the Hawaiian Islands and Johnston Atoll (Burgess 1978, Randall 2005, G.R. Allen pers. comm. 2006). It is known to occur to at least 250 m depth.
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Mozambique
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Central Pacific: Johnston Atoll and Hawaiian Islands.
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Physical Description

Morphology

Dorsal spines (total): 13 - 14; Dorsal soft rays (total): 20 - 23; Anal spines: 2 - 3; Analsoft rays: 17 - 20
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Size

Maximum size: 130 mm SL
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Max. size

13.0 cm SL (male/unsexed; (Ref. 4858))
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Diagnostic Description

Body is generally yellow or white with vertical rows of spots on the sides. A broad black bar runs vertically through eye from edge of sub opercle, and a black spot is on the caudal peduncle.
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Type Information

Type for Chaetodon mantelliger
Catalog Number: USNM 49699
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Preparation: Illustration
Collector(s): O. Jenkins
Locality: Hawaiian Islands, Hawaii, United States, Pacific
  • Type:
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Ecology

Habitat

Environment

reef-associated; marine; depth range 0 - 250 m (Ref. 58302)
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Habitat and Ecology

Habitat and Ecology
Habitat for this species includes coastal fringing reefs, lagoons, and outer reefs to at least 250 m depth. Juveniles are found on shallow inner reefs from April to June. The species feeds in mid-water on zooplankton, supplementing the diet with benthic invertebrates (especially polychaete worms) and fish eggs (particularly those of damselfishes) (G.R. Allen pers. comm. 2006).

The species may form large groups and spawns in groups from January through May (Ralston 1981). Ralston (1976a) reported that the onset of reproductive maturity in Chaetodon miliaris
begins at 90 mm standard length, which is equivalent to one year of age (Ralston 1976b).

The mean size of C. miliaris in Hawaii reported by Ralston (1981) was ~105 mm corresponding to approximately two years of age.



Systems
  • Marine
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Known from seamounts and knolls
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Depth range based on 19 specimens in 1 taxon.
Water temperature and chemistry ranges based on 11 samples.

Environmental ranges
  Depth range (m): 4.575 - 50000
  Temperature range (°C): 18.151 - 25.104
  Nitrate (umol/L): 0.006 - 1.609
  Salinity (PPS): 34.865 - 35.294
  Oxygen (ml/l): 4.799 - 5.165
  Phosphate (umol/l): 0.092 - 0.291
  Silicate (umol/l): 1.266 - 5.128

Graphical representation

Depth range (m): 4.575 - 50000

Temperature range (°C): 18.151 - 25.104

Nitrate (umol/L): 0.006 - 1.609

Salinity (PPS): 34.865 - 35.294

Oxygen (ml/l): 4.799 - 5.165

Phosphate (umol/l): 0.092 - 0.291

Silicate (umol/l): 1.266 - 5.128
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
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Depth: 0 - 250m.
Recorded at 250 meters.

Habitat: reef-associated. Inhabits shallow reef flats. Forms schools at midwater to feed on plankton and benthic invertebrates.
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Trophic Strategy

Inhabit shallow reef flats. Form schools at midwater to feed on plankton and benthic invertebrates. Also on shallow seamounts. Forage high in the water column (Ref. 4864).
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Diseases and Parasites

Hurleytrematoides Infestation 7. Parasitic infestations (protozoa, worms, etc.)
  • Nahhas, F.M. and A. Grewal 1999 Digenetic trematodes from marine fishes of Fiji: Subfamily Hurleytrematinae (family Monorchiidae): A review and description of four new species of Hurleytrematoides. p.617-631. In Séret B. and J.-Y. Sire (eds.) Proc. 5th Indo-Pac. Fish Conf., Nouméa, 1997. Paris: Soc. Fr. Ichtyol. (Ref. 48836)   http://www.fishbase.org/references/FBRefSummary.php?id=48836&speccode=380 External link.
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Life History and Behavior

Life Cycle

Distinct pairing (Ref. 205).
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Chaetodon miliaris

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 1
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
Pyle, R. & Craig, M.T.

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

Contributor/s

Justification
Chaetodon miliaris is an abundant species throughout its range. More than two thirds of its range is enclosed by the Papahanaumokuakea Marine National Monument, a no-take marine protected area. It is therefore listed as Least Concern.
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Population

Population
It is very abundant in the Hawaiian Islands, but very rare at Johnston Atoll (Allen 1980, M. Craig pers. obs. 2005, G.R. Allen pers. comm. 2006, P. Lobel pers. comm. 2007). Populations are generally stable (G.R. Allen pers. comm. 2006).

Population Trend
Stable
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Threats

Least Concern (LC)
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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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Management

Conservation Actions

Conservation Actions
There are no species-specific conservation measures in place (Hawaii Division of Aquatic Resources.). It is present within marine protected areas, for example, the Papahānaumokuākea Marine National Monument, a no-take marine reserve that encompasses 2/3 of the species range.
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Relevance to Humans and Ecosystems

Benefits

Importance

aquarium: commercial
  • Miyasaka, A. 1993 A database on scientific and common names of fishes exported from Hawaii. The information was derived from the above mentioned database. A printout of the names is also available from the State of Hawaii, Department of Land and Natural Resources, 1151 Punchbowl Street, Honolulu, Hawaii. (Ref. 5358)   http://www.fishbase.org/references/FBRefSummary.php?id=5358&speccode=4306 External link.
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Wikipedia

Millet butterflyfish

The Millet Butterflyfish, Chaetodon miliaris,[1] is a species of butterflyfish (family Chaetodontidae).

In its subgenus Exornator it probably belongs to a group that also includes the African Butterflyfish (C. dolosus), the Crochet Butterflyfish (C. guentheri) and the Reef Butterflyfish (C. sedentarius). The Crochet Butterflyfish might be the closest living relative of C. miliaris. If the genus Chaetodon is split up, Exornator might become a subgenus of Lepidochaetodon.[2]

This fish is endemic to the Hawaiian islands.

Footnotes

  1. ^ Froese, Rainer, and Daniel Pauly, eds. (2006). "Chaetodon miliaris" in FishBase. April 2006 version.
  2. ^ Fessler & Westneat 2007

References

  • Fessler, Jennifer L.; Westneat, Mark W. (2007). "Molecular phylogenetics of the butterflyfishes (Chaetodontidae): Taxonomy and biogeography of a global coral reef fish family.". [[[Molecular Phylogenetics and Evolution|Mol. Phylogenet. Evol.]] 45 (1): 50–68. doi:10.1016/j.ympev.2007.05.018. 
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