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	Provedor de dados ArchiMer (4) Autor Fromentin, Jean-marc (4) Bonhommeau, Sylvain (3) Brisset, Blandine (2) Farrugio, Henri (2) Bauer, Robert (1) De Metrio, Gregorio (1) Deflorio, Michèle (1) Poisson, Francois (1) Mais... Palavra-chave Index of abundance (4) Aerial survey (3) Atlantic bluefin tuna (3) Gulf of Lions (3) Strip transect (3) Thunnus thynnus (2) Distance sampling (1) Fishery-independent (1) Gulf of Lyon (1) Ligurian and Tyrrhenian Sea (1) Mediterranean Sea (1) Mais... Tipo do documento Text (4) Ano 2015 (1) 2013 (1) 2010 (1) 2003 (1) País France (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Aerial surveys to monitor bluefin tuna abundance and track efficiency of management measures ArchiMer Bauer, Robert; Bonhommeau, Sylvain; Brisset, Blandine; Fromentin, Jean-marc. Conservation and management measures for exploited fish species rely on our ability to monitor variations in population abundance. In the case of the eastern stock of Atlantic bluefin tuna (ABFT), recent changes in management policies have strongly affected the reliability of fishery-dependent indicators due to drastic changes in fishing season/area, fisheries selectivity and strategy. However, fishery-independent indices of abundance are rare for large pelagic fish, and obtaining them is often costly and labor intensive. Here, we show that scientific aerial surveys are an appropriate tool for monitoring juvenile bluefin tuna abundance in the Mediterranean. We present an abundance index based on 62 aerial surveys conducted since 2000, using 2 statistical... Tipo: Text Palavras-chave: Thunnus thynnus; Index of abundance; Fishery-independent; Gulf of Lions; Mediterranean Sea; Strip transect; Distance sampling. Ano: 2015 URL: https://archimer.ifremer.fr/doc/00281/39192/45096.pdf Preliminary results of aerial surveys of bluefin tuna in the western Mediterranean sea ArchiMer Fromentin, Jean-marc; Farrugio, Henri; Deflorio, Michèle; De Metrio, Gregorio. One of the aims of the EU project STROMBOLI (2000-2002) was to conduct an aerial survey for bluefin tuna in the western Mediterranean Sea to test the feasibility of computing an index of abundance from direct observation. This approach has at least two advantages: (i) to provide fishery-independent information and observation, and (ii) to compensate for the lack of Mediterranean purse seine CPUE indices. The first surveys were done in June-July 2000 over the Balearic and Sicilian areas, where and when adult bluefin tuna used to concentrate for spawning, but the results were disappointing (spawners can hardly be detected from a plane). In contrast, the results obtained from the surveys for juveniles of BFT in the Gulf of Lions and in the Ligurian and... Tipo: Text Palavras-chave: Atlantic bluefin tuna; Aerial survey; Index of abundance; Gulf of Lions; Ligurian and Tyrrhenian Sea. Ano: 2003 URL: http://archimer.ifremer.fr/doc/00194/30531/28949.pdf Update of the index of abundance of juvenile bluefin tuna in the western Mediterranean sea until 2011 ArchiMer Fromentin, Jean-marc; Bonhommeau, Sylvain; Brisset, Blandine. Here we present an update of the aerial surveys that have been carried out by IFREMER in the western Mediterranean Sea since 2000. This collection of data enables the monitoring of the bluefin juvenile population since the Gulf of Lyon is considered as a nursery for young individuals. The detections of juvenile bluefin tuna are carried out along the same transects between 2000-2003 and then 2009-2011 and are used to calculate a fishery-independent index of bluefin tuna abundance. This index can therefore be included in the stock assessment procedure as an abundance index of juveniles. Tipo: Text Palavras-chave: Atlantic bluefin tuna; Thunnus thynnus; Aerial survey; Index of abundance; Gulf of Lyon; Strip transect. Ano: 2013 URL: http://archimer.ifremer.fr/doc/00191/30275/28736.pdf Aerial surveys of bluefin tuna in the Western Mediterranean sea: retrospective, prospective, perspective ArchiMer Bonhommeau, Sylvain; Farrugio, Henri; Poisson, Francois; Fromentin, Jean-marc. While the current stock status of bluefin tuna (BFT) has been considered as declining, there remain considerable data limitations for its stock assessment in the Mediterranean Sea. The collection of fishery-independent data reveals to be crucial to compensate for the lack of Mediterranean purse seine CPUE indices as well as to overcome a potential halt in the bluefin tuna fishery that would impede the monitoring of the stock and the comparison to reference points. Here we present a retrospective of aerial surveys that have been carried out since 2000. It includes the protocol as well as a retrospective of temporal and spatial distribution of detected schools. We then propose several perspectives that could improve the data collection method itself and the... Tipo: Text Palavras-chave: Atlantic bluefin tuna; Aerial survey; Index of abundance; Gulf of Lions; Strip transect. Ano: 2010 URL: http://archimer.ifremer.fr/doc/00192/30292/28775.pdf Registros recuperados: 4 Primeira ... 1 ... Última

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