| General information |
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Thunnus obesus (Lowe, 1839) |
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| Common name | Bigeye tuna |
| Synonyms |
- |
| IUCN Red List status (2014) |
Vulnerable (VU) |
| Habitat |
Saltwater |
| Systematics |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Neoteleostei; Acanthomorphata; Pelagiaria; Scombriformes; Scombridae. |
| Geographical distribution |
India; China; Japan; Indonesia; Bangladesh; Malaysia; Sri Lanka; Pakistan; Philippines; Thailand; Taiwan; South Korea; Maldives; Vietnam; Myanmar; Oman; Brunei; Turkey; Australia; New Zealand; Papua New Guinea; South Africa; Tanzania; Madagascar; Angola; Somalia; Kenya; Morocco; Nigeria; Namibia; Cameroon; Mozambique; Ghana; Mauritania; Ivory Coast; Liberia; Senegal; Guinea; Sierra Leone; Spain; Portugal; USA; Mexico; Canada; American Soma; Brazil; Argentina; Colombia; Peru; Venezuela; Ecuador; Uruguay; Guyana; Suriname; French Guiana; Hawaii; Cuba; Jamaica; Puerto Rico; Nicaragua; Haiti; Dominican Republic; Fiji; French Polynesia; Guam; Kiribati; Marshall Islands; Micronesia; New Caledonia; Samoa; Solomon Islands; Tonga; Vanuatu; Anguilla; Antigua and Barbuda; Aruba; Bahamas; Barbados; Bermuda; British Virgin Islands; Cayman Islands; Curaçao Island; Grenada; Guadeloupe; Martinique; Montserrat; Saint Kitts and Nevis; Saint Lucia; Saint Vincent and the Grenadines; Trinidad and Tobago; Turks and Caicos Islands; Virgin Islands (USA); Benin; Cape Verde; Comoros; Democratic Republic of the Congo; Republic of the Congo; Djibouti; Equatorial Guinea; Gabon; Gambia; Mauritius; Reunion; Saint Helena; Sao Tome and Principe; Seychelles; Togo; Western Sahara |
| Occurrence |
native: India; native: China; native: Japan; native: Indonesia; native: Bangladesh; native: Malaysia; native: Sri Lanka; native: Pakistan; native: Philippines; native: Thailand; native: Taiwan; native: South Korea; native: Maldives; native: Vietnam; native: Myanmar; native: Oman; native: Brunei; questionable: Turkey; native: Australia; native: New Zealand; native: Papua New Guinea; native: South Africa; native: Tanzania; native: Madagascar; native: Angola; native: Somalia; native: Kenya; native: Morocco; native: Nigeria; native: Namibia; native: Cameroon; native: Mozambique; native: Ghana; native: Mauritania; native: Ivory Coast; native: Liberia; native: Senegal; native: Guinea; native: Sierra Leone; native: Spain; native: Portugal; native: USA; native: Mexico; native: Canada; native: American Soma; native: Brazil; native: Argentina; native: Colombia; native: Peru; native: Venezuela; native: Ecuador; native: Uruguay; native: Guyana; native: Suriname; native: French Guiana; native: Hawaii; native: Cuba; native: Jamaica; native: Puerto Rico; native: Nicaragua; native: Haiti; native: Dominican Republic; native: Fiji; native: French Polynesia; native: Guam; native: Kiribati; native: Marshall Islands; native: Micronesia; native: New Caledonia; native: Samoa; native: Solomon Islands; native: Tonga; native: Vanuatu; native: Anguilla; native: Antigua and Barbuda; native: Aruba; native: Bahamas; native: Barbados; native: Bermuda; native: British Virgin Islands; native: Cayman Islands; native: Curaçao Island; native: Grenada; native: Guadeloupe; native: Martinique; native: Montserrat; native: Saint Kitts and Nevis; native: Saint Lucia; native: Saint Vincent and the Grenadines; native: Trinidad and Tobago; native: Turks and Caicos Islands; native: Virgin Islands (USA); native: Benin; native: Cape Verde; native: Comoros; native: Democratic Republic of the Congo; native: Republic of the Congo; native: Djibouti; native: Equatorial Guinea; native: Gabon; native: Gambia; native: Mauritius; native: Reunion; native: Saint Helena; native: Sao Tome and Principe; native: Seychelles; native: Togo; native: Western Sahara |
| Importance |
Food fish, commercial value |
| Remarks |
|
| Karyological information |
| Geographical area of study |
St. Peter and St. Paul Archipelago in the Mid-Atlantic region, approximately 1100 km from the Brazilian coast |
| Source of chromosomes |
Anterior kidney fragment culture and peripheral blood culture |
| Number of specimens with sex |
2 |
| Diploid chromosome number |
48 |
| Karyotype formula |
2m +2st +44a |
| Fundamental arm number |
52 |
| Chromosome length |
Not reported |
| Sex chromosome |
Not reported |
| Chromosome staining/banding/FISH |
Discrete heterochromatic blocks were present in the centromeric regions of the chromosomes. 18S rDNA/Ag-NORs/ CMA3+/DAPI-sites were located on the short arms of a subtelocentric pair. 5S rDNA genes were located on chromosome pair 24. |
| Reference |
Soares RX, Bertollo LAC, da Costa GWWF, Molina WF (2013).Karyotype stasis in four Atlantic Scombridae fishes: mapping of classic and dual-color FISH markers on chromosomes. Fisheries Science 79:177–183. |
| Cross Link |