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Overview

Comprehensive Description

Biology

Adults usually inhabit rocky reefs (Ref. 7247). Oviparous, distinct pairing during breeding (Ref. 205). Eggs are demersal and adhere to the substrate (Ref. 205). Males guard and aerate the eggs (Ref. 205).
  • Allen, G.R. and A.R. Emery 1985 A review of the Pomacentrid fishes of the genus Stegastes from the Indo-Pacific, with descriptions of two new species. Indo-Pac. Fish. (3):31. (Ref. 510)
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Distribution

Northwest Pacific: known only from Japan and the adjacent Ryukyu Islands. Recently reported from Taiwan (Ref. 12711) and South Korea (Ref. 77001).
  • Allen, G.R. and A.R. Emery 1985 A review of the Pomacentrid fishes of the genus Stegastes from the Indo-Pacific, with descriptions of two new species. Indo-Pac. Fish. (3):31. (Ref. 510)
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Western North Pacific.
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Physical Description

Morphology

Dorsal spines (total): 12 - 13; Dorsal soft rays (total): 15 - 17; Analspines: 2; Analsoft rays: 12 - 13
  • Allen, G.R. and A.R. Emery 1985 A review of the Pomacentrid fishes of the genus Stegastes from the Indo-Pacific, with descriptions of two new species. Indo-Pac. Fish. (3):31. (Ref. 510)
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Size

Maximum size: 150 mm NG
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Max. size

15.0 cm TL (male/unsexed; (Ref. 9710))
  • Lieske, E. and R. Myers 1994 Collins Pocket Guide. Coral reef fishes. Indo-Pacific & Caribbean including the Red Sea. Haper Collins Publishers, 400 p. (Ref. 9710)
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Diagnostic Description

Body color is medium brown, sometimes with slight diffusion of yellow. The edges of scales are narrowly bordered with dusky brown. The suborbital is lavender or blue and the lips are pale gray. The pectoral fins are translucent with brownish rays and yellow suffusion on posterior edge. A prominent black spot bordered with light blue is on the outer part of anterior dorsal spines running from base of 1st spine to distal tip of 5th or 6th spine.
  • Allen, G.R. and A.R. Emery 1985 A review of the Pomacentrid fishes of the genus Stegastes from the Indo-Pacific, with descriptions of two new species. Indo-Pac. Fish. (3):31. (Ref. 510)
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Ecology

Habitat

Environment

reef-associated; non-migratory; marine; depth range 5 - 20 m (Ref. 9710)
  • Lieske, E. and R. Myers 1994 Collins Pocket Guide. Coral reef fishes. Indo-Pacific & Caribbean including the Red Sea. Haper Collins Publishers, 400 p. (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): 5 - 7
  Temperature range (°C): 26.960 - 26.960
  Nitrate (umol/L): 0.498 - 0.498
  Salinity (PPS): 34.192 - 34.192
  Oxygen (ml/l): 4.578 - 4.578
  Phosphate (umol/l): 0.284 - 0.284
  Silicate (umol/l): 4.892 - 4.892

Graphical representation

Depth range (m): 5 - 7
 
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Depth: 5 - 20m.
From 5 to 20 meters.

Habitat: reef-associated.
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Trophic Strategy

Usually inhabits rocky regions (Ref. 9137).
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Life History and Behavior

Life Cycle

Oviparous, distinct pairing during breeding (Ref. 205). Eggs are demersal and adhere to the substrate (Ref. 205). Males guard and aerate the eggs (Ref. 205).
  • Breder, C.M. and D.E. Rosen 1966 Modes of reproduction in fishes. T.F.H. Publications, Neptune City, New Jersey. 941 p. (Ref. 205)
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Stegastes altus

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 6
Species With Barcodes: 1
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Conservation

Threats

Not Evaluated
  • IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
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Wikipedia

Stegastes altus

The Japanese gregory, Stegastes apicalis, is a damselfish of the family Pomacentridae native to the northwestern Pacific Ocean in the seas around Japan and the Ryukyu Islands. It has also been reported from Taiwan and South Korea. It is found on rocky reefs at depths ranging from 5 to 20 m (16 to 66 ft).[2]

References[edit]

  1. ^ Bailly, Nicolas (2013). "Stegastes altus (Okada & Ikeda, 1937)". World Register of Marine Species. Retrieved 2014-01-08. 
  2. ^ "Stegastes altus (Okada & Ikeda, 1937): Japanese gregory". FishBase. Retrieved 2014-01-08. 
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