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A worldwide review of purse seine fisheries on FADs ArchiMer
Fonteneau, Alain; Pallares, P; Pianet, Renaud.
This paper develops a comparative overview of the development of Fish Aggregating Devices (or fads) by the tropical purse seine fisheries in various ocean areas (Atlantic, Indian, Western and Eastern Pacific Oceans). First, a comparative review of fishery statistics is developed. Recent catches on fads by purse seiners can be estimated at a level of one million tons yearly. This comparison allows to describe the fishing zones and catch trends over time, the species composition and size taken in the various fad fisheries. Skipjack tuna is the dominant species in most fad fisheries, but significant amounts of yellowfin and bigeye are also frequently taken under fads. The paper also presents an overview of various observer data concerning the by-catches of...
Tipo: Text Palavras-chave: Attracting techniques Fisheries Purse seines Size Tuna fisheries Article Geographic Terms: A; Atlantic I; Pacific ISW; Indian Ocean.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00042/15278/12664.pdf
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An overview on the use of precautionary approach and tuna management ArchiMer
Fonteneau, Alain; Fromentin, Jean-marc.
This paper develops a critical overview of the various problems and uncertainties faced in tuna stock assessment, management and conservation. This presentation is based on Atlantic tunas, but also on various tuna stocks worldwide. Tuna jisheries management is characterized by major uncertainties in the stock assessment; since these stock assessments are always done only on jishery data which are often biased. Fortunately most tuna stocks are showing a strong resistance to overfishing. These major characteristics of tuna stocks and jisheries, and the bias in the scientific analysis, are presented and discussed. As a result, many of the reference point recommended for the precautionary approach applied to jisheries are often quite inappropriate for tuna...
Tipo: Text Palavras-chave: Tunas; Precautionay approach; Atlantic; Management; Assessment.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00194/30564/28984.pdf
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Biogeography of tuna and billfish communities ArchiMer
Reygondeau, Gabriel; Maury, Olivier; Beaugrand, Gregory; Fromentin, Jean-marc; Fonteneau, Alain; Cury, Philippe.
Aim The aims of this study were: (1) to identify global communities of tuna and billfish species through quantitative statistical analyses of global fisheries data; (2) to describe the spatial distribution, main environmental drivers and species composition of each community detected; and (3) to determine whether the spatial distribution of each community could be linked to the environmental conditions that affect lower trophic levels by comparing the partitions identified in this study with Longhursts biogeochemical provinces. Location The global ocean from 60 degrees S to 65 degrees N. Methods We implemented a new numerical procedure based on a hierarchical clustering method and a nonparametric probabilistic test to divide the oceanic biosphere into...
Tipo: Text Palavras-chave: Biogeochemical provinces; Global ocean; Istiophorus; Katsuwonus; Macroecology; Makaira; Marine biogeography; Tetrapturus; Thunnus; Xiphias.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00060/17141/14716.pdf
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Biological reference points and natural long-term fluctuations: the case of eastern Atlantic bluefin tuna ArchiMer
Fromentin, Jean-marc; Fonteneau, Alain; Farrugio, Henri.
Defining biological key reference points is of importance within the precautionary approach. Most of the reference points, such as the FMSY, Fo.], presuppose a steady state, i.e. the natural long-term fluctuations of the population are low or moderate. In this manuscript, we present historical data from Sicilian, Sardinian, Portuguese, and Tunisian traps of the Atlantic bluefin tuna during 200 to 400 years. Long-term fluctuations in trap data could be considered as a good proxy for long-term trend in true abundance because trap is a passive gear which was submitted to low modification until the XX century and because data from different areas display similar long-term variations. Trends in trap data appear beIl shaped, with a maximum at the end ofthe XIXth...
Tipo: Text
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00194/30485/28890.pdf
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DCP employés par les pêcheries artisanales et industrielles : une question d'échelle. L’utilisation et le développement technique des DCP au coeur de la conférence de Tahiti sur les DCP ArchiMer
Taquet, Marc; Blanc, Michel; Dagorn, Laurent; Filmalter, John David; Fonteneau, Alain; Forget, Fabien; Gaertner, Jean-claude; Galzin, René; Gervain, Paul; Goujon, Michel; Guillotreau, Patrice; Guyader, Olivier; Hall, Martin; Holland, Kim; Itano, David; Monteagudo, Jean-pierre; Morales-nin, Beatriz; Reynal, Lionel; Sharp, Michael; Sokimi, Williams; Tanetoa, Mainui; Yen Kai Sun, Stephen.
Tipo: Text
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00115/22657/20383.pdf
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Deep diving behavior observed in yellowfin tuna (Thunnus albacares) ArchiMer
Dagorn, Laurent; Holland, Kim N.; Hallier, Jean-pierre; Taquet, Marc; Moreno, Gala; Sancho, Gorka; Itano, David; Aumeeruddy, Ryaz; Girard, Charlotte; Million, Julien; Fonteneau, Alain.
Yellowfin tuna (Thunnus albacares) are known to preferentially occupy the Surface mixed layer above the thermocline and it has been Suggested that they are physiologically restricted to water lerriperatt.11-CS no more than 8 degrees C colder than Surface waters. However, we here report for dive data acquired from a large yellowfin tuna which demonstrate for the first time that this species is indeed capable of making prolonged dives into deep cold waters. A yellowfin tuna (134 cm fork length) caught near ail anchored fish aggregating device (FAD) in the Seychelles (Western Indian Ocean) was equipped with all internally implanted archival tag and released. The fish was recaptured 98 days later. As predicted for this species, this fish spent 85% of its time...
Tipo: Text Palavras-chave: Indian ocean; Yellowfin tuna; Swimming speed; Diving behavior; Vertical movements; Archival tap.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-1402.pdf
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Drifting FADs used in tuna fisheries: an ecological trap? ArchiMer
Marsac, F; Fonteneau, Alain; Menard, Frederic.
This paper discusses the hypothesis that small tunas and the various species found in association with drifting fads (such as "mahi-mahi", rainbow runner, wahoo, etc.) may be biologically trapped by such a strong association. Massive seeding of drifting artificial fads was observed worldwide during recent years. In this hypothesis, we suggest that fads may alter some biological characteristics of epipelagic populations associated with them: migration, growth, condition factors, predation and natural mortality. As fads are most often used in the equatorial currents, they tend to exhibit zonal drift. Therefore, the associated populations would be artificially transferred from one part of the ocean to another, when they would show different movement patterns...
Tipo: Text Palavras-chave: Attracting techniques Biology Conservation Fishing Migrations Purse seines Trap fishing Tuna fisheries Article Geographic Terms: A; Atlantic.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00042/15303/12636.pdf
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Ecosystem approach to fisheries: a brief overview and some considerations for its application in ICCAT ArchiMer
Fromentin, Jean-marc; Fonteneau, Alain; Restrepo, Victor.
During the last SCRS plenary meeting, the sub-committee on environment suggested to present a document on the ‘Ecosystem Approach to Fisheries’ (EAF). This document firstly recalls the general scientific and institutional background of EAF, then we propose a synoptic view of EAF, including four main domains: governance, exploitation, resources and impacts on ecosystems. The way that EAF is tackled within the various tuna commissions is then summarised. Finally, we rapidly examine the way the SCRS could cope with EAF issues and we suggest to merge the sub-committee on environment with this on by-catch into a single subcommittee on ecosystem.
Tipo: Text Palavras-chave: Ecosystem; Resources; Exploitation; Governance; Environment; By-catch.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/00192/30334/28809.pdf
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Fishing effects and life history traits: a case study comparing tropical versus temperate tunas ArchiMer
Fromentin, Jean-marc; Fonteneau, Alain.
This study aims to test whether exploitation affects tunas and tuna-like species displaying contrasting life history traits similarly. We first collected information on life history of 10 commercial Atlantic species and then compared this information using multivariate analysis. On one hand, tropical tunas are characterised by small to medium size, rapid growth, early age-at-maturity, long spawning duration and short life span. These species, therefore, display a rapid turnover, characteristic of r-selected species. On the other hand, temperate tunas display differing life history traits, i.e., large size, slow growth, late age-at-maturity, short spawning duration and long life span. The turnover of these species is slow and present characteristics similar...
Tipo: Text Palavras-chave: Management measures; Sustainability; Fishing; Long term fluctuations; Simulation modelling; Skipjack; Bluefin tuna.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/2001/publication-434.pdf
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Identification of skipjack tuna juveniles based on DNA control region sequences and potential spawning area around reunion island ArchiMer
Nikolic, Natacha; Jerome, Marc; Fonteneau, Alain; Evano, Hugues; Verrez-bagnis, Veronique.
In this study, we confirmed that DNA control region can be used to identify potential spawning area from pelagic juveniles species. We used the mitochondrial DNA control region to identify tuna juveniles predated by common dolphinfish and sampled in surface waters around Reunion Island. These were skipjack juveniles at an early stage (small length and young age). The biological results confirmed the species identification based on DNA analysis. Catch data by longline reveal a higher number of skipjack from October to December around Reunion Island corresponding to the period of our skipjack juvenile sampling
Tipo: Text Palavras-chave: Skipjack tuna; Reunion island; DNA; Age; Juvenile.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00299/40993/42657.pdf
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Patterns of variations in large pelagic fish: A comparative approach between the Indian and the Atlantic Oceans ArchiMer
Corbineau, A.; Rouyer, Tristan; Fromentin, Jean-marc; Cazelles, B.; Fonteneau, Alain; Menard, Frederic.
Catch data of large pelagic fish such as tuna, swordfish and billfish are highly variable ranging from short to long term. Based on fisheries data, these time series are noisy and reflect mixed information on exploitation (targeting, strategy, fishing power), population dynamics (recruitment, growth, mortality, migration, etc.), and environmental forcing (local conditions or dominant climate patterns). In this work, we investigated patterns of variation of large pelagic fish (i.e. yellowfin tuna, bigeye tuna, swordfish and blue marlin) in Japanese longliners catch data from 1960 to 2004. We performed wavelet analyses on the yearly time series of each fish species in each biogeographic province of the tropical Indian and Atlantic Oceans. In addition, we...
Tipo: Text
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00011/12231/9029.pdf
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Short review on biology, structure, and migration of thunnus alalunga in the indian ocean ArchiMer
Nikolic, Natacha; Fonteneau, Alain; Hoarau, Ludovic; Morandeau, Gilles; Puech, Alexis; Bourjea, Jerome.
The most comprehensive contribution to our understanding of albacore tuna, Thunnus alalunga, comes from studies in the Pacific and Atlantic Ocean. In the Indian Ocean, there is little information about this species in the literature. In the present paper, we propose a short review on albacore in the Indian Ocean with a particular attention on the biology, the structure, and the migration. We focused on these fields because they are key components of stock assessment undertaken by the Regional Fishery Management Organization. This work is part of an ongoing work on a global review of albacore tuna in the world.
Tipo: Text
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00208/31925/30343.pdf
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The Atlantic Bluefin Tuna: A global perspective ArchiMer
Fonteneau, Alain; Fromentin, Jean-marc.
This communication presents a global overview of Atlantic bluefin tuna biology, exploitation and management. The comparison between bluefin tuna and all other tuna species do show that this species is ranking number one among other tunas world wide in a wide range of its resources and fisheries characteristics. Bluefin tuna is for instance the gold winner in the category of fisheries (about 10,000 years of documented fisheries, the highest price in the market, the largest tuna taken), of its peculiar biology (large migration, homing, growth, etc.) and in the category of risks presently faced by the resource, because of its multiple scientific uncertainties still pending, its increasingly serious statistical problems and the heavy political context in the...
Tipo: Text Palavras-chave: Pêche; Durabilité; Pêche abusive; Migration; Caractéristique du cycle vital; Fisheries; Sustainability; Overfishing; Migration; Life history trait..
Ano: 2003 URL: http://archimer.ifremer.fr/doc/00194/30568/28995.pdf
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The True Challenge of Giant Marine Reserves ArchiMer
Kaplan, David; Bach, Pascal; Bonhommeau, Sylvain; Chassot, Emmanuel; Chavance, Pierre; Dagorn, Laurent; Davies, Tim; Dueri, Sibylle; Fletcher, Rick; Fonteneau, Alain; Fromentin, Jean-marc; Gaertner, Daniel; Hampton, John; Hilborn, Ray; Hobday, Alistair; Kearney, Robert; Kleiber, Pierre; Lehodey, Patrick; Marsac, Francis; Maury, Olivier; Mees, Chris; Menard, Frederic; Pearce, John; Sibert, John.
Tipo: Text
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00139/25068/23186.pdf
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