|Scientific Name:||Hydrolagus macrophthalmus|
|Species Authority:||de Buen, 1959|
|Red List Category & Criteria:||Data Deficient ver 3.1|
|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.
|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.|
|FAO Marine Fishing Areas:||
Present - origin uncertain:
Pacific – eastern central; Pacific – southeast
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||Nothing is known, the only two specimens that have ever been reported are the types.|
|Current Population Trend:||Unknown|
|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
|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|
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. http://dx.doi.org/10.2305/IUCN.UK.2006.RLTS.T60193A12308043.en . Downloaded on 10 October 2015.|
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