General information |
||
| Thunnus obesus (Lowe, 1839) | ||
| 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, China, Japan, Indonesia, Bangladesh, Malaysia, Sri Lanka, Pakistan, Philippines, Thailand, Taiwan, South Korea, Maldives, Vietnam, Myanmar, Oman, Brunei, 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 Questionable: Turkey |
|
| 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(s) |
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. |
|