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| Labelle, Marc; Hoch, Thierry; Liorzou, Bernard; Bigot, Jean-louis. |
| Sampling operations are not routinely conducted in France to monitor the landings of bluefin tuna caught by purse seiners in the Mediterranean. The length, weight and age frequencies of bluefin caught by this fleet are predicted based on sale records, length-at-age and weight-length relations, trends in fishing and natural mortality rates, and other ancillary data. The resulting length frequencies are more accurate than those predicted by Liorzou and Bigot (1992) using a simpler algorithm, and are spread more evenly across adjacent size classes. Catch-per-unil-effort (CPUE) was expressed as the numbers of age 2 bluefin caught per successful seine fishing trip in the Gulf of Lions fall fishery. CPUE indices were computed by several methods, and compared to... |
| Tipo: Text |
Palavras-chave: Thon rouge; Senne tournante; Prises-par-unité-d'effort; Indices d'abondance; Taux de croissance; Évaluation des stocks; Mer Méditerranée; Bluefin tuna; Purse seine; Catch-per-unit-effort; Abundance indices; Growth rates; Stock-assessment; Mediterranean sea. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00188/29880/28357.pdf |
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| Hattour, A.. |
| L’évolution temporelle de la structure démographique des prises de thon rouge (Thunnus thynnus, Linnaeus, 1758) et de la thonine (Euthynnus alletteratus, Rafinesque 1810) par les madragues tunisiennes de Sidi Daoud et de Monastir est étudiée au cours de 3 périodes quinquennales (1979-1983; 1988-1992 et 1993-1997). Cette étude a montré que les deux points de débarquement des captures passives puisent le thon rouge à partir de deux populations de composition différente. Les poissons pris dans les eaux tunisiennes ne forment pas un groupement d’êtres semblables. Cela tient à un mélange de forme locale, méditerranéenne et Atlantique. Une conclusion à laquelle est arrivée Heldt (1929), confirmée en 2004, par les études des déplacements de thon rouge marqué... |
| Tipo: Journal Contribution |
Palavras-chave: Madrague; Thonaire; Thonine; Thon rouge; Euthynnus alletteratus; Thunnus thunnus; Little tuna; Bluefin tuna Trap nets Tuna fisheries. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/1164 |
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