Rajella nigerrima

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

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Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
ANIMALIA	CHORDATA	CHONDRICHTHYES	RAJIFORMES	RAJIDAE

Scientific Name:

Rajella nigerrima

Species Authority:

(de Buen, 1960)

Common Name/s:

English

–

Blackish Skate

Synonym/s:

Breviraja nigerrima de Buen, 1960

Malacoraja nigerrima (de Buen, 1960)

Assessment Information [top]

Red List Category & Criteria:	Least Concern ver 3.1
Year Assessed:	2004
Assessor/s	Lamilla, J.
Evaluator/s:	Kyne, P.M., Cavanagh, R.D. & Fowler, S.L. (Shark Red List Authority)
Justification: The blackish skate is endemic to the Ecuador, Peru and Chile in the Southeast Pacific. It is a deepwater species recorded from the continental slopes at depths of 590 to 1,000 m. Reaches a maximum size of 45.7 cm total length (TL). Nothing known of its biology. Generally no fisheries in its deepwater habitat at present, but likely to be taken as bycatch if deepwater trawl fisheries develop and expand in this region.

Geographic Range [top]

Range Description:	Southeast Pacific Ocean: known from Ecuador (03°15’S) to Mocha Island, Chile (37°45’S).
Countries:	Native: Chile; Ecuador; Peru
FAO Marine Fishing Areas:	Native: Pacific – southeast

Population [top]

Population Trend:	Unknown

Population Trend:

Unknown

Habitat and Ecology [top]

Habitat and Ecology:	A deepwater skate species recorded on the continental slopes, at 800 m depth off Algarrobo, Chile (33°20’S) by de Buen (1960), at depths of 780 to 960 m by McEachran and Miyake (1984), and 590 to 1,000 m depth off Chile (Lamilla, unpubl. data). Individuals examined off Chile were 13.7 to 45.7 cm TL (males, n = 28) and 5.4 to 12.0 cm TL (juvenile females, n = 27). Adult females possibly occur in deeper water. Nothing known of its biology.
Systems:	Marine

Habitat and Ecology:

A deepwater skate species recorded on the continental slopes, at 800 m depth off Algarrobo, Chile (33°20’S) by de Buen (1960), at depths of 780 to 960 m by McEachran and Miyake (1984), and 590 to 1,000 m depth off Chile (Lamilla, unpubl. data). Individuals examined off Chile were 13.7 to 45.7 cm TL (males, n = 28) and 5.4 to 12.0 cm TL (juvenile females, n = 27). Adult females possibly occur in deeper water. Nothing known of its biology.

Systems:

Marine

Threats [top]

Major Threat(s):	Generally no fisheries in its deepwater habitat at present. No information available. May be taken as bycatch as deepwater trawl fisheries continue to expand.

Major Threat(s):

Generally no fisheries in its deepwater habitat at present. No information available. May be taken as bycatch as deepwater trawl fisheries continue to expand.

Citation:	Lamilla, J. 2004. Rajella nigerrima. In: IUCN 2009. IUCN Red List of Threatened Species. Version 2009.2. <www.iucnredlist.org>. Downloaded on 09 February 2010.
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