Overview

Comprehensive Description

Biology

Holotype taken from a depth between 388 and 412 m (Ref. 26282). Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205).
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Distribution

Range Description

Western central Atlantic: recorded from Bahamas and southern Florida (McEachran and de Carvalho 2002).
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Western Central Atlantic: known from the type locality, off northwestern part of Little Bahama Bank, Bahamas.
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Western Atlantic.
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Physical Description

Type Information

Holotype for Raja bahamensis
Catalog Number: USNM 198034
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Preparation: Unknown
Year Collected: 1961
Locality: N. Atlantic: Off Great Abaco, Abaco, Bahama Islands, Bahamas, Bahamian Archipelago, Atlantic
Depth (m): 411
Vessel: Silver Bay
  • Holotype:
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
Benthic along upper slope, between 366?411 m (McEachran and de Carvalho 2002). Biology is virtually unknown, but the maximum size is reported at 54 cm total length (TL) (McEachran and de Carvalho 2002).

Systems
  • Marine
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Environment

bathydemersal; marine; depth range 388 - 412 m (Ref. 26282)
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Depth range based on 5 specimens in 1 taxon.
Water temperature and chemistry ranges based on 5 samples.

Environmental ranges
  Depth range (m): 366 - 411
  Temperature range (°C): 13.472 - 16.007
  Nitrate (umol/L): 12.270 - 17.745
  Salinity (PPS): 35.891 - 36.216
  Oxygen (ml/l): 3.349 - 4.143
  Phosphate (umol/l): 0.650 - 0.958
  Silicate (umol/l): 4.899 - 9.876

Graphical representation

Depth range (m): 366 - 411

Temperature range (°C): 13.472 - 16.007

Nitrate (umol/L): 12.270 - 17.745

Salinity (PPS): 35.891 - 36.216

Oxygen (ml/l): 3.349 - 4.143

Phosphate (umol/l): 0.650 - 0.958

Silicate (umol/l): 4.899 - 9.876
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Depth: 388 - 412m.
From 388 to 412 meters.

Habitat: bathydemersal.
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Life History and Behavior

Life Cycle

Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449).
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
DD
Data Deficient

Red List Criteria

Version
3.1

Year Assessed
2009

Assessor/s
McCormack, C.

Reviewer/s
Valenti, S.V. & Musick, J.A. (Shark Red List Authority)

Contributor/s

Justification
The Bahama Skate (Raja bahamensis) rare and poorly known deepwater skate found on upper slopes of the Bahamas and southern Florida at depths of 388?411 m. Attains at least 54 cm total length, but little is known about its biology. Nothing is known about the interaction of this species with fisheries and it is not possible to assess it beyond Data Deficient at present. Its bathymetric distribution may place it beyond the range of most shrimp trawling effort at present, however, the species has a very limited range and close monitoring is required.
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Population

Population
No information available.

Population Trend
Unknown
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Threats

Major Threats
Potential bycatch of demersal trawl fisheries, although no information is currently available, and this species? bathymetric distribution may place it below most shrimp trawling effort within its range.
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Data deficient (DD)
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Management

Conservation Actions

Conservation Actions
No management or conservation efforts are currently in place. Like many deeper water species more information on biology, ecology and importance in fisheries are required to further assess status and any future conservation needs. Further surveys would benefit the collection of data on the wider range of this species.

Where taken, catches require monitoring, particularly as deepwater fisheries expand worldwide. The development and implementation of management plans (national and/or regional e.g., under the FAO International Plan of Action for the Conservation and Management of Sharks: IPOA-Sharks) are required to facilitate the conservation and management of all chondrichthyan species in the region.
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