Table of Contents
Overview
Comprehensive Description
Biology
Oceanic, usually living deeper than 500 m during the day. Smaller individuals migrate to the surface at night. Possibly feeding on crustaceans and fishes (Ref. 58426). Minimum depth from Ref. 58018.
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Gibbs, R.H. Jr. 1990 Astronesthidae. p. 300-307. In J.C. Quero, J.C. Hureau, C. Karrer, A. Post and L. Saldanha (eds.) Check-list of the fishes of the eastern tropical Atlantic (CLOFETA). JNICT, Lisbon; SEI, Paris and UNESCO, Paris. Vol. 1. (Ref. 4465)
http://www.fishbase.org/references/FBRefSummary.php?id=4465&speccode=11694
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Distribution
Eastern Atlantic: Mauritania south to Angola; reported from central Namibia (Ref. 27121). Western Atlantic: Gulf of Mexico and Bahamas area; and across the Atlantic (20°N-10°S). One specimen known from the southwest Atlantic (25°27'S, 35°56'W).
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Gibbs, R.H. Jr. 1990 Astronesthidae. p. 300-307. In J.C. Quero, J.C. Hureau, C. Karrer, A. Post and L. Saldanha (eds.) Check-list of the fishes of the eastern tropical Atlantic (CLOFETA). JNICT, Lisbon; SEI, Paris and UNESCO, Paris. Vol. 1. (Ref. 4465)
http://www.fishbase.org/references/FBRefSummary.php?id=4465&speccode=11694
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Range Description
This species occurs from Mauritania to central Namibia. It has also been found in the western Atlantic by Georges Bank (Moore et al. 2003), the Gulf of Mexico, the Bahamas and across the Atlantic. One specimen is known from the southwest Atlantic (25°27'S, 35°56'W).
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south slope of Georges Bank to the Bahamas
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North-West Atlantic Ocean species (NWARMS)
http://www.marinespecies.org/aphia.php?p=sourcedetails&id=2901
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Gulf of Mexico, North West Atlantic
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North-West Atlantic Ocean species (NWARMS)
http://www.marinespecies.org/aphia.php?p=sourcedetails&id=2901
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Felder, D.L. and D.K. Camp (eds.), Gulf of Mexico–Origins, Waters, and Biota. Biodiversity. Texas A&M Press, College Station, Texas.
http://www.marinespecies.org/porifera/porifera.php?p=sourcedetails&id=145245
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Physical Description
Morphology
Dorsal soft rays (total): 15 - 17; Analsoft rays: 12 - 15
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McEachran, J.D. and J.D. Fechhelm 1998 Fishes of the Gulf of Mexico. Volume 1: Myxiniformes to Gasterosteiformes. University of Texas Press, Austin. 1112p. (Ref. 37039)
http://www.fishbase.org/references/FBRefSummary.php?id=37039&speccode=2308
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Size
Max. size
15.9 cm SL (male/unsexed; (Ref. 4465))
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Gibbs, R.H. Jr. 1990 Astronesthidae. p. 300-307. In J.C. Quero, J.C. Hureau, C. Karrer, A. Post and L. Saldanha (eds.) Check-list of the fishes of the eastern tropical Atlantic (CLOFETA). JNICT, Lisbon; SEI, Paris and UNESCO, Paris. Vol. 1. (Ref. 4465)
http://www.fishbase.org/references/FBRefSummary.php?id=4465&speccode=11694
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Diagnostic Description
Barbel without pigment, tapering to end, lacking swelling or bulb (Ref. 37473). Body moderately elongate and slender. Maxillary teeth closely spaced. Serial photophores not broken into small groups. Luminous patches present on margin of operculum. Black in color (Ref. 37039).
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McEachran, J.D. and J.D. Fechhelm 1998 Fishes of the Gulf of Mexico. Volume 1: Myxiniformes to Gasterosteiformes. University of Texas Press, Austin. 1112p. (Ref. 37039)
http://www.fishbase.org/references/FBRefSummary.php?id=37039&speccode=2308
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Ecology
Habitat
Environment
bathypelagic; oceanodromous (Ref. 51243); marine; depth range 275 - 1000 m (Ref. 58426)
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Riede, K. 2004 Global register of migratory species - from global to regional scales. Final Report of the R&D-Projekt 808 05 081. Federal Agency for Nature Conservation, Bonn, Germany. 329 p. (Ref. 51243)
http://www.fishbase.org/references/FBRefSummary.php?id=51243&speccode=4683
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Coad, B.W. and J.D. Reist 2004 Annotated list of the arctic marine fishes of Canada. Can. MS Rep. Fish Aquat. Sci. 2674:iv:+112 p. (Ref. 58426)
http://www.fishbase.org/references/FBRefSummary.php?id=58426&speccode=10003
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Habitat and Ecology
Habitat and Ecology
Systems
Astronesthes richardsoni is a mesopelagic species that is thought to occur at depths of up to 1,000m. It is thought that, like most species of this genus, it tends to live deeper than 500m during the day. Some, particularly smaller individuals, migrate up the water column to feed at night (Gibbs 1984). Its diet may consist of smaller fishes and crustaceans.
Systems
- Marine
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nektonic
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North-West Atlantic Ocean species (NWARMS)
http://www.marinespecies.org/aphia.php?p=sourcedetails&id=2901
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Depth range based on 24 specimens in 1 taxon.
Water temperature and chemistry ranges based on 12 samples.
Environmental ranges
Depth range (m): 103.5 - 1900
Temperature range (°C): 3.528 - 20.166
Nitrate (umol/L): 5.476 - 36.323
Salinity (PPS): 34.815 - 36.687
Oxygen (ml/l): 1.558 - 5.254
Phosphate (umol/l): 0.398 - 2.386
Silicate (umol/l): 2.444 - 27.741
Graphical representation
Depth range (m): 103.5 - 1900
Temperature range (°C): 3.528 - 20.166
Nitrate (umol/L): 5.476 - 36.323
Salinity (PPS): 34.815 - 36.687
Oxygen (ml/l): 1.558 - 5.254
Phosphate (umol/l): 0.398 - 2.386
Silicate (umol/l): 2.444 - 27.741
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
Water temperature and chemistry ranges based on 12 samples.
Environmental ranges
Depth range (m): 103.5 - 1900
Temperature range (°C): 3.528 - 20.166
Nitrate (umol/L): 5.476 - 36.323
Salinity (PPS): 34.815 - 36.687
Oxygen (ml/l): 1.558 - 5.254
Phosphate (umol/l): 0.398 - 2.386
Silicate (umol/l): 2.444 - 27.741
Graphical representation
Depth range (m): 103.5 - 1900
Temperature range (°C): 3.528 - 20.166
Nitrate (umol/L): 5.476 - 36.323
Salinity (PPS): 34.815 - 36.687
Oxygen (ml/l): 1.558 - 5.254
Phosphate (umol/l): 0.398 - 2.386
Silicate (umol/l): 2.444 - 27.741
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
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Migration
Oceanodromous. Migrating within oceans typically between spawning and different feeding areas, as tunas do. Migrations should be cyclical and predictable and cover more than 100 km.
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Riede, K. 2004 Global register of migratory species - from global to regional scales. Final Report of the R&D-Projekt 808 05 081. Federal Agency for Nature Conservation, Bonn, Germany. 329 p. (Ref. 51243)
http://www.fishbase.org/references/FBRefSummary.php?id=51243&speccode=4683
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Trophic Strategy
ceanic, usually living deeper than 500 m during the day. Smaller individuals migrate to the surface at night. Possibly feeding on crustaceans and fishes (Ref. 58426).
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Bigelow, H.B., D.M. Cohen, M.M. Dick, R.H. Gibbs Jr., M. Grey, J.E. Morrow Jr., L.P. Schultz and V. Walters 1964 Fishes of the western North Atlantic. Part four. New Haven, Sears Found. Mar. Res., Yale Univ. (Ref. 37473)
http://www.fishbase.org/references/FBRefSummary.php?id=37473&speccode=10153
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Molecular Biology and Genetics
Molecular Biology
Statistics of barcoding coverage: Astronesthes richardsoni
Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 10
Species With Barcodes: 1
Public Records: 0
Specimens with Barcodes: 10
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
Collen, B., Richman, N. & Ram, M. (Sampled Red List Index Coordinating Team)
Reviewer/s
Polidoro, B., Elfes, C. & Carpenter, K.E.
Contributor/s
De Silva, R., Milligan, H., Lutz, M., Batchelor, A., Jopling, B., Kemp, K., Lewis, S., Lintott, P., Sears, J., Wilson, P., Smith, J. & Livingston, F.
Justification
Astronesthes richardsoni has been assessed as Least Concern. This broad ranging species is not known to have any major threats. It is likely that the population is not undergoing significant population declines.
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Trends
Population
Population
Population Trend
There is no known population information for Astronesthes richardsoni.
Population Trend
Unknown
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Threats
Least Concern (LC)
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IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
http://www.fishbase.org/references/FBRefSummary.php?id=57073
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Major Threats
There is no directed fishery for this species. Due to the deepwater and oceanic nature of this species it is unlikely to be impacted by coastal development and pollution from urban centres.
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Management
Conservation Actions
Conservation Actions
There are no species-specific conservation measures in place, or needed, for Astronesthes richardsoni.
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