Analyses of connections between Atlantic Bluefin tuna fisheries at both sites of the Atlantic comprising Balfegó catch rates in Balearic spawning ground.

• Main Author: Gordoa, Ana
• Format: Article in Journal/Newspaper
• Language: English
• Published: International Commission for the Conservation of Atlantic Tunas 2013
• Subjects: Geographical distribution; Fishery management; Bluefin tuna; Thunnus thynnus; Tuna fisheries; Northeast Atlantic
• Online Access: http://hdl.handle.net/10261/89033

13 páginas, 3 figuras, 1 tabla. [EN]This study analyzes connections among Atlantic bluefin tuna fisheries at both sites of the Atlantic. Catch rates of nine fisheries including Balfegó CPUE are analyzed in this study. In 2012 Balfegó CPUE near triplicates 2011 rates and showed the strength of 2003 cohort. The correlation analysis showed positive 1correlations between The Gulf of St. Lawrence fishery, Japanese LL in area 2, Spanish traps and Balfegó purse seiners, indicators of the eastern Atlantic bluefin tuna breeders. The U.S. northeast Atlantic fishery correlates negatively with Gulf of St Lawrence, south of Nova Scotia and Japanese LL in region 17&18 but positively with eastern juveniles of Spanish baitboat indices of ages 1, 2, and 3. Japanese longliners indices of western and eastern correlate positively; no correlation was found within each group. Japanese longliners Area 3 correlates positively with Spanish baitboat age 1, age 2 with areas 5&med and 17&18. The south Nova Scotia fishery correlates negative with ages 3 and 4. Morocco traps, the only fishery that did not correlate with any other. This study showed valuable information and reveals the need to revise the current western and eastern fisheries categorization criteria and provides additional tool to investigate the Atlantic bluefin tuna distribution. [FR]La présente étude analyse les connexions entre les pêcheries de thon rouge de l'Atlantique des deux côtés de l'Atlantique. Les taux de capture de neuf pêcheries, y compris la CPUE de Balfegó, sont analysés dans la présente étude. En 2012, la CPUE de Balfegó a presque triplé les taux de 2011 et a montré la force de la cohorte de 2003. L'analyse de corrélation a montré des corrélations positives entre la pêcherie du golfe du Saint-Laurent, la pêcherie palangrière japonaise dans la zone 2, les madragues espagnoles et les senneurs de Balfegó, indicateurs des thons rouges reproducteurs de l'Atlantique Est. La pêcherie de l'Atlantique Nord-Est des États- Unis a une corrélation négative ...