Articles on this page are available in 1 other language: Spanish (1) (learn more)

Overview

Comprehensive Description

Hydrolagus macrophthalmus ZBK

- 4 specimens ( Chile ). MNHNC P. 7282 (E.B.M.Ch.10.192), holotype , adult male, at time of description 625 mm TL, currently 385 mm TL (due to damage of specimen), 360 mm PCL, 296 BDL, preabyssmal zone off Valpraiso, January, 1959 ; MNHNC P. 5724, adult male, about 445 mm TL, 365 mm PCL, 296 BDL, off Valpariso (33°02, 71°39’W ), determined by Ismael Kong U., 15 Sept 1974 ; MNHNC P. 6421 (A), adult female, 627 mm TL, 425 mm PCL, 355 mm BDL, vessel R/V Academic Knipovich, ( 41°04’5” S , 74°16’1” W ), determined by Augusto Cornejo C., 300 m, 02 Mar 1973 ; MNHNC P. 6421 (B), adult female, 572 mm TL (tail broken), 493 mm PCL, 424 mm BDL, same information as (A) .

Hydrolagus macrophthalmus ZBK

- 7 specimens ( Peru ). HUMZ 185708, adult female, 560 mm TL, 415 mm PCL, 342 mm BDL, Eastern Pacific, Peru (9-42.5'S - 9-43'S, 79-35.5'W - 79-43.5'W), 785 m ; HUMZ 185709, adult male, 527 mm TL, 355 mm PCL, 358 BDL, Eastern Pacific, Peru , (9-42.5'S - 9-43'S, 79-35.5'W - 79-43.5'W), 787 m ; HUMZ 167821, adult female, 515 mm TL, 420 mm PCL, 346 mm BDL, Eastern Pacific, Peru (10-12.2'S - 10-10.8'S, 79-06.3'W - 79-06.7'W), 1056 m ; HUMZ 167443, adult Female, 636 mm TL, 424 mm PCL, 357 mm BDL, Eastern Pacific, Peru (9-20.5'S - 9-19.5'S, 79-47.7'W - 79- 48.4'W), 1160 m ; HUMZ 167820, adult female, 594 mm TL, 425 mm PCL, 353 mm BDL, Eastern Pacific, Peru (10-12.2'S - 10-10.8'S, 79-06.3'W - 79-06.7'W), 1056 m ; HUMZ 167128, adult male, 612 mm TL, 391 mm PCL, 320 mm BDL, Eastern Pacific, Peru (9-03.7'S - 9-06.5'S, 80-00.7'W - 80-00.6'W), 872 m ; HUMZ 173320, adult female, 540 mm TL, 420 mm PCL, 346 mm BDL, Eastern Pacific, Peru (3-56.2'S - 4-03.4'S, 81- 16.8'W - 81-11.8'W), 590 m .

  • Kimberly L. Quaranta, Dominique A. Didier, Douglas J. Long, David A. Ebert (2006): A new species of chimaeroid, Hydrolagus alphus sp. nov. (Chimaeriformes: Chimaeridae) from the Galapagos Islands. Zootaxa 1377, 33-45: 43-43, URL:http://www.zoobank.org/urn:lsid:zoobank.org:pub:E5D0DE3F-2256-4E32-9056-83CFFB919447
Public Domain

MagnoliaPress via Plazi

Source: Plazi.org

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Biology

Oviparous (Ref. 205). Eggs are encased in horny shells (Ref. 205).
Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© FishBase

Source: FishBase

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Distribution

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.
Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

© International Union for Conservation of Nature and Natural Resources

Source: IUCN

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Southeast Pacific: Chile.
Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© FishBase

Source: FishBase

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Southeastern Pacific: Chile and Peru.
Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

© FishWise Professional

Source: FishWise Professional

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Ecology

Habitat

Habitat and Ecology

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

Systems
  • Marine
Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

© International Union for Conservation of Nature and Natural Resources

Source: IUCN

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Environment

demersal; marine
Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© FishBase

Source: FishBase

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Depth range based on 1 specimen in 1 taxon.

Environmental ranges
  Depth range (m): 275 - 275
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Life History and Behavior

Life Cycle

Oviparous (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)
Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© FishBase

Source: FishBase

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
DD
Data Deficient

Red List Criteria

Version
3.1

Year Assessed
2006

Assessor/s
Dagit, D.D.

Reviewer/s
Kyne, P.M., Fowler, S.L. & Compagno, L.J.V. (Shark Red List Authority)

Contributor/s

Justification
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.
Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

© International Union for Conservation of Nature and Natural Resources

Source: IUCN

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Population

Population
Nothing is known, the only two specimens that have ever been reported are the types.

Population Trend
Unknown
Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

© International Union for Conservation of Nature and Natural Resources

Source: IUCN

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Threats

Major Threats
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
Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

© International Union for Conservation of Nature and Natural Resources

Source: IUCN

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Data deficient (DD)
  • IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© FishBase

Source: FishBase

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Management

Conservation Actions

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.
Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

© International Union for Conservation of Nature and Natural Resources

Source: IUCN

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Wikipedia

Bigeye chimaera

The bigeye chimaera (Hydrolagus macrophthalmus) is a species of fish in the Chimaeridae family. It is found in Chile and possibly Ecuador. Its natural habitat is open seas.

Source[edit]

Creative Commons Attribution Share Alike 3.0 (CC BY-SA 3.0)

Source: Wikipedia

Unreviewed

Article rating from 0 people

Default rating: 2.5 of 5

Disclaimer

EOL content is automatically assembled from many different content providers. As a result, from time to time you may find pages on EOL that are confusing.

To request an improvement, please leave a comment on the page. Thank you!