Hydrolagus macrophthalmus 

Scope: Global
Language: English

Translate page into:

Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Chondrichthyes Chimaeriformes Chimaeridae

Scientific Name: Hydrolagus macrophthalmus de Buen, 1959
Common Name(s):
English Bigeye Chimaera

Assessment Information [top]

Red List Category & Criteria: Data Deficient ver 3.1
Year Published: 2006
Date Assessed: 2006-01-31
Needs updating
Assessor(s): Dagit, D.D.
Reviewer(s): Kyne, P.M., Fowler, S.L. & Compagno, L.J.V. (Shark Red List Authority)
This is the rarest and most poorly known species of chimaeroid. There are no other recorded specimens of this species other than the two type specimens from the preabyssmal zone off Valparaiso, Central Chile. It is, however, probably more widespread than presently known. Recent surveys off the Pacific Coast of Central America and the Galapagos have discovered at least one or perhaps a complex of similar species (J. McCosker, pers. comm.). With study, some of these specimens may prove to be attributed to H. macrophthalmus. It is possible this species is potentially threatened by commercial deepwater fishing operations (particularly if it is determined to have a restricted range), which may catch this species as bycatch, however information is presently unavailable. Further specimens and research is required before the species can be assessed beyond Data Deficient.

Geographic Range [top]

Range Description:Southeast Pacific: known only from the preabyssal zone off Valparaiso, Central Chile (Type locality). Probably occurs as far south as Valdivia and might occur north to the Galapagos and Central America (e.g., Nicaragua and Guatemala) and as such could be more widespread than presently known.
Countries occurrence:
FAO Marine Fishing Areas:
Present - origin uncertain:
Pacific – eastern central; Pacific – southeast
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Nothing is known, the only two specimens that have ever been reported are the types.
Current Population Trend:Unknown
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:Nothing is known. No data are available on depth range. Probably a deepwater species with a life history similar to other members of the genus Hydrolagus. The only two known specimens (the type specimens) were 63 cm TL.

Life history parameters
Age at maturity (years): Unknown.
Size at maturity (total/body length):
Longevity (years): Unknown.
Maximum size (total/body length): At least 63 cm TL.
Size at birth (cm): Unknown.
Average reproductive age (years): Unknown.
Gestation time (months): Unknown.
Reproductive periodicity: Unknown.
Average annual fecundity or litter size: Unknown.
Annual rate of population increase: Unknown.
Natural mortality: Unknown

Threats [top]

Major Threat(s): There are no other reports of capture of this species other than the types; however it is possible this species is potentially threatened by commercial deepwater fishing operations, which may catch this species as bycatch. However, information is presently unavailable

Conservation Actions [top]

Conservation Actions: Further specimens are required to define the species' range, biology and potential fisheries impacts.

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.

Citation: Dagit, D.D. 2006. Hydrolagus macrophthalmus. The IUCN Red List of Threatened Species 2006: e.T60193A12308043. . Downloaded on 23 July 2018.
Disclaimer: To make use of this information, please check the <Terms of Use>.
Feedback: If you see any errors or have any questions or suggestions on what is shown on this page, please provide us with feedback so that we can correct or extend the information provided