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| Fromentin, Jean-marc. |
| The present paper proposes a simple descriptive analysis of the ICCAT bluefin tuna tagging database. Since 1954, about 91.2% of the tags were released in the West Atlantic and 8.8% in the East Atlantic. The great majority of tags was recaptured in their area of release, i.e., 95.7% and 97.25% for the East and the West Atlantic, respectively. The number of tags released in the West and recaptured in the East (102) was about 5 times higher than the reverse (19), but the percentage of transatlantic migrations from East-to-West (4.3%) was about 2 times higher than the one from West-to-East (2.25%). The percentage of transatlantic migrations varies over time, especially from West-to-East. It was much higher during the 90’s (7.6%) than in the three previous... |
| Tipo: Text |
Palavras-chave: Conventional tag; Migration rates; Thunnus thynnus; East and West Atlantic stocks. |
| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/00194/30495/28904.pdf |
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| Fromentin, Jean-marc. |
| Since 2007, Ifremer together with the French Federation of Sport fishermen (FFPM) and Big Game Fishing Club France (BGFCF) have been carrying out a program of conventional and electronic tagging on bluefin tuna in the western Mediterranean Sea. 479 and 95 ICCAT “spaghetti” tags have been deployed by the FFPM recreational and sportive fishermen along the Mediterranean French coasts in 2007 and 2008, respectively. To date, not a single recapture has been registered. Ifremer together with BGFCF has deployed 11, 6 and 8 pop-up archival tags (PAT) offshore of Marseille in 2007, 2008 and 2009, respectively. Outputs were impaired by two main technical difficulties: premature detachment and low transmission rates in the Argos band over the Mediterranean. While... |
| Tipo: Text |
Palavras-chave: Thunnus thynnus; Tagging; Mediterranean Sea; Pop-up archival tag; Conventional tag. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00192/30291/28770.pdf |
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