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Diplophos taenia 

Scope: Global
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Actinopterygii Stomiiformes Gonostomatidae

Scientific Name: Diplophos taenia Günther, 1873
Regional Assessments:
Common Name(s):
English Pacific Portholefish
Synonym(s):
Diplophos proximus Parr, 1931

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2015
Date Assessed: 2013-05-22
Assessor(s): Harold, A.
Reviewer(s): Weller, S., Strongin, K., Polidoro, B. & Carpenter, K.E.
Justification:
Diplophos taenia is circum-globally distributed in tropical and subtropical waters. There is no use and trade information available for this species. There are no species-specific threats to D. taenia. There are no species-specific conservation measures in place for D. taenia. Therefore, this species is listed as Least Concern.



Geographic Range [top]

Range Description:Diplophos taenia is circum-globally distributed in tropical and subtropical waters (Harold in press) and is found primarily between about 40oN and 30oS. It is not found in the eastern tropical Pacific (Ozawa et al. 1990). It undergoes diel vertical migrations, with juveniles and adults being found by day at depths of 300-800 m, and reaching the surface at night (Mundy 2005). The recorded depth range of this species is zero to 1,594 m in the South China Sea (Yang et al. 1996). It occurs throughout the Eastern Central Atlantic at a depth range of 15-800 m.
Countries occurrence:
Native:
American Samoa; Angola; Anguilla; Antigua and Barbuda; Aruba; Australia; Bahamas; Bangladesh; Barbados; Belize; Benin; Bermuda; Bonaire, Sint Eustatius and Saba; Brazil; British Indian Ocean Territory; Cameroon; Cape Verde; Cayman Islands; Chile (Easter Is.); China; Christmas Island; Cocos (Keeling) Islands; Colombia; Comoros; Congo; Congo, The Democratic Republic of the; Cook Islands; Costa Rica; Côte d'Ivoire; Cuba; Curaçao; Disputed Territory (Paracel Is., Spratly Is.); Djibouti; Dominica; Dominican Republic; Equatorial Guinea; Eritrea; Fiji; France (Clipperton I.); French Guiana; French Polynesia; French Southern Territories (Mozambique Channel Is.); Gabon; Gambia; Ghana; Gibraltar; Grenada; Guadeloupe; Guatemala; Guinea; Guinea-Bissau; Guyana; Haiti; Honduras; India (Andaman Is., Nicobar Is.); Indonesia; Iran, Islamic Republic of; Jamaica; Japan; Kenya; Kiribati (Kiribati Line Is., Phoenix Is.); Korea, Republic of; Liberia; Madagascar; Malaysia; Maldives; Marshall Islands; Martinique; Mauritania; Mauritius; Mayotte; Mexico; Micronesia, Federated States of ; Montserrat; Morocco; Mozambique; Myanmar; Namibia; Nauru; New Caledonia; New Zealand; Nicaragua; Nigeria; Niue; Norfolk Island; Northern Mariana Islands; Oman; Pakistan; Palau; Panama; Papua New Guinea; Peru; Philippines; Pitcairn; Portugal (Azores, Madeira, Portugal (mainland)); Puerto Rico; Réunion; Saint Helena, Ascension and Tristan da Cunha (Ascension, Saint Helena (main island)); Saint Kitts and Nevis; Saint Lucia; Saint Martin (French part); Saint Vincent and the Grenadines; Samoa; Sao Tomé and Principe; Senegal; Seychelles; Sierra Leone; Sint Maarten (Dutch part); Solomon Islands; Somalia; South Africa; Spain (Canary Is., Spain (mainland)); Sri Lanka; Suriname; Taiwan, Province of China; Tanzania, United Republic of; Thailand; Togo; Tokelau; Tonga; Trinidad and Tobago; Turks and Caicos Islands; Tuvalu; United Arab Emirates; United States; United States Minor Outlying Islands (Howland-Baker Is., Johnston I., Wake Is.); Vanuatu; Venezuela, Bolivarian Republic of; Viet Nam; Virgin Islands, British; Virgin Islands, U.S.; Wallis and Futuna; Western Sahara; Yemen
FAO Marine Fishing Areas:
Native:
Atlantic – western central; Atlantic – eastern central; Atlantic – northeast; Atlantic – northwest; Atlantic – southeast; Atlantic – southwest; Indian Ocean – eastern; Indian Ocean – western; Mediterranean and Black Sea; Pacific – eastern central; Pacific – southeast; Pacific – northwest; Pacific – southwest; Pacific – western central
Additional data:
Lower depth limit (metres):1594
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Diplophos taenia is abundant in museum collections (389 lots), and the majority of the collections contain few individuals (>15 specimens per lot; FishNet2 Database searched February 2013).

In the Eastern Central Atlantic (ECA), this species can be locally abundant. There have been concentrated collections in the upper portion of the ECA due to upwelling areas. In these areas, this species has been collected frequently. It is not known whether there is substantial immigration/emigration from outside the region that will significantly affect populations in the ECA.
Current Population Trend:Stable
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:Diplophos taenia is mesopelagic species which occurs at depths ranging from zero to 1,594 m (Yang et al. 1996). It has been found associated with seamounts (Vinnichenko 1997). This species reaches a maximum length of 27.6 cm but is more typically seen to 20 cm (Quero et al. 1990). Juveniles are found in the surface mixed layer at zero to 150 m, and occur in roughly equal numbers throughout the year (Johnson and Barnett 1972).
Systems:Marine

Use and Trade [top]

Use and Trade: There is no use and trade information available for D. taenia.

Threats [top]

Major Threat(s): There are no species-specific threats to D. taenia.

Conservation Actions [top]

Conservation Actions: There are no species-specific conservation measures in place for D. taenia.

Citation: Harold, A. 2015. Diplophos taenia. The IUCN Red List of Threatened Species 2015: e.T18252702A42691724. . Downloaded on 16 October 2018.
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