|
|
|
| Registros recuperados: 134 | |
|
|
| Pearce, J.. |
| This paper presents a review of the tuna fishery within the 200-mile Fisheries Conservation and Management Zone (FCMZ) of the British Indian Ocean Territory (BIOT) (Chagos Archipelago), over the period 1991 to 1995. Particular emphasis is placed on the most recent fishing seasons 1993-1994 and 1994-1995. Fishing inside the BIOT FCMZ has been dominated by distant-water fishing nations. Longliners from Japan, Korea and Taiwan have fished in the area around the Chagos Archipelago for many years. Purseseine vessels have operated in the area since the early 1980s. Some records of driftnetting also exist prior to the ban on driftnetting in 1992. The tuna fishery inside the zone is highly seasonal and highly variable. Longline vessels typically operate during two... |
| Tipo: Preprint |
Palavras-chave: Tuna fisheries; Purse seines. |
| Ano: 1996 |
URL: http://hdl.handle.net/1834/497 |
| |
|
|
| Edwards, E.F.; Donahue, M.. |
| A review of currently available literature conceming interactions between tuna purse-seines and dolphins outside the eastern tropical Pacific Ocean (ETP) does not indicate any large, sustained, or widespread practice of setting purse seine nets around cetaceans for the purpose of catching tuna in any oceanic area other than in the ETP. While a number of individual reports exist of purse-seine sets made on cetaceans during the process of fishing for tuna in areas other than the ETP, there is no quantitative or even anecdotal indication that large-scale sustained directed fishing on cetaceans during tuna purse-seining occurs anywhere other than in the ETP. However, this lack of information should not be mistaken for conclusive evidence that such large-scale... |
| Tipo: Report |
Palavras-chave: Tuna fisheries; Marine mammals. |
| Ano: 1996 |
URL: http://hdl.handle.net/1834/908 |
| |
|
|
| Morales-nin, B; Cannizzaro, L; Massuti, E; Potoschi, A; Andaloro, F. |
| The Mediterranean small-scale fleet is highly adaptive, showing a dynamic fishing intensity and strategy, and exploiting seasonal abundant resources. In this area, the aggregatory behaviour under floats of juvenile fish has been used since ancient times to exploit oceanic migratory species such as dolphinfish (Coryphaena hippurus), using Fish Aggregating anchored Devices (fads). A total of 2 300 boats are engaged in this fishery from August to December, the main fishing areas being those around Malta, Tunisia, Sicily and Majorca. The fads ( arrow right m2) are made of different cheap floating materials, and are moored in fixed places, ranging from shore waters to areas 60 miles off the coast (1 500 m depth). Each boat deploys an average of 20 to 100 fads.... |
| Tipo: Text |
Palavras-chave: Artisanal fishing; Attracting techniques; Fishery development; Tuna fisheries; Coryphaena hippurus; Naucrates ductor; Seriola dumerili; Article Geographic Terms: MED. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00042/15286/12672.pdf |
| |
|
|
| Garciarena, A.D.. |
| Data obtained by observers on board of two fishing vessels during six trips carried out between January-April 2010 to catch tuna were analyzed. Thirty-four fishing days were completed and of the 59 trawls performed 37 turned out positive (with tuna catches). The fishing gear consisted of a purse seine net. Exploitation took place within the Argentine-Uruguayan Common Fishing Zone, between 36° S-39° S. The main landings occurred in March and consisted of slender tuna, Allothunnus fallai (57%), followed by albacore, Thunnus alalunga (28.5%), in January and bonito, Sarda sarda (14%), in April. Sea surface temperature ranged 16 °C-19 °C. A total of 25 length frequency samples allowed to measure individuals of the species above mentioned and those of skipjack... |
| Tipo: Journal Contribution |
Palavras-chave: Tuna fisheries; Catch statistics; Commercial fishing; Allothunnus fallai; Thunnus alalunga; Sarda sarda; Observers; Marine environment. |
| Ano: 2011 |
URL: http://hdl.handle.net/1834/4882 |
| |
|
| |
|
|
| Hattour, A.. |
| The temporal evolution of the demographic structure of bluefin tuna (Thunnus thynnus, Linnaeus 1758) and of the little tuna (Euthynnus alletteratus, Rafinesque 1810) by the Tunisian traps of Sidi Daoud and Monastir is studied during 3 periods (1979-1983; 1988-1992 and 1993-1997). This survey showed the two points of passive capture landing draw the bluefin tuna from two populations of different composition. The fish taken from Tunisian waters do not from a homogenous group of similar beings, since they result from a mixture of local Mediterrean and Atlantic forms. This conclusion was arrived at by Heldt (1929), and confirmed in 2004, by displacement studies indicated that, after reproduction, the adults (<100kg) remained in the Mediterranean, and that,... |
| Tipo: Journal Contribution |
Palavras-chave: Euthynnus alletteratus Thunnus thynnus; Population structure; Trap nets; Stock identification; Tuna fisheries; Population structure; Http://aims.fao.org/aos/agrovoc/c_6115. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/4235 |
| |
|
|
| de Montaudouin, X.; Hallier, J.-P.; Hassani, S.. |
| The tuna purse seine fishery based in Seychelles is analysed using data collected by observers on board French, Spanish, Japanese and Soviet vessels. From 1986 to 1989, diffferent types of data were recorded such as meteorolical and oceanographic parameters, aspects and sizes of schools sighted, seiner activities, fishing characteristics (catch, yield, duration of fishing sets). Reliability of observers data with respect to catches is assessed by comparison with log data from French purse seiners. |
| Tipo: Report |
Palavras-chave: Tuna fisheries; Data collections; Purse seiners. |
| Ano: 1990 |
URL: http://hdl.handle.net/1834/5117 |
| |
|
|
| Nishida, T.; Komatsu, T.. |
| Strengthening tuna management is one of the primary tasks for the new Indian Ocean Tuna Commission (IOTC). Stock assessment and the prediction of the dynamics of the tuna resources will become increasingly important research topics because they provide the basic information for the management decision process. Under these circumstances, this paper attempts to develop the stock analyses and prediction techniques using neural networks. As a first step and as a test study, analyses and predictions of catch rates of the Japanese yellowfin tuna longline fisheries are attempted. |
| Tipo: Proceedings Paper |
Palavras-chave: Fishery management; Stock assessment; Catch/effort; Tuna fisheries. |
| Ano: 1998 |
URL: http://hdl.handle.net/1834/60 |
| |
|
|
| Cayré, P.; Norungee, D.; Lim Shung, C.. |
| Tagging is considered an excellent tool for estimating the importance of interactions and competition between fisheries as well as to study tuna stocks and migrations. The Regional Tuna Project of the Indian Ocean Commission (IOC) conducted five tagging cruises in the western Indian Ocean, during which 955 fishes were tagged. Out of the total number tagged 15 were recaptured. Tuna tagging in the Indian Ocean was also undertaken by the Indo- Pacific Tuna Programme and by the Japanese National Research Institute of Far Seas Fisheries. 39 tuna marked by these organisations were recovered in Mauritius. Analysis of data collected from the tag recoveries provide some preliminary estimates of growth rate and migration of tuna. Tagging is the most direct method to... |
| Tipo: Preprint |
Palavras-chave: Tagging; Tuna fisheries. |
| Ano: 1995 |
URL: http://hdl.handle.net/1834/519 |
| |
|
| |
|
| |
|
| |
|
|
| Travassos Tolotti, Mariana; Filmalter, John David; Bach, Pascal; Travassos, Paulo; Seret, Bernard; Dagorn, Laurent. |
| Recently, declining populations of several pelagic shark species have led to global conservation concerns surrounding this group. As a result, a series of species-specific banning measures have been implemented by Regional Fishery Management Organizations (RFMOs) in charge of tuna fisheries, which include retention bans, finning bans and trading bans. There are both positive and negative aspects to most management measures, but generally, the positive aspects outweigh the negatives, ensuring the measure is beneficial to the resource and its users in the long term. Banning measures are a good first step towards the conservation of pelagic shark species, especially since they improve conservation awareness among fishers, managers and the public. Measures... |
| Tipo: Text |
Palavras-chave: Bycatch; Conservation; Fin trade; Pelagic shark; Tuna fisheries. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00626/73842/73726.pdf |
| |
|
|
| Rey-valette, H; Martins, P. |
| A new programme concerning the experimentation of about thirty Fish Aggregating Devices (FADs) is to start in the Cape Verde Islands at the end of 1999. In this context, this communication is intended: - to evaluate the halieutic, economic and social conditions of the artisanal fishery in this archipelago, notably in terms of assets and constraints. Although these conditions are very heterogeneous depending on islands, the fads seem to be able to help the stabilization and the development of the fishing activities, disadvantaged by a low productivity, limited operating ranges of boats, and very irregular outings at sea. But the narrowness of the domestic market is likely to cause drops in the fish prices if the production increases, while the absence of... |
| Tipo: Text |
Palavras-chave: Attracting techniques; Capture fishery economics; Fishery management; Operational costs; Stock assessment; Tuna fisheries; Article Geographic Terms: Cape Verde Is.. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00042/15317/12644.pdf |
| |
|
|
| Hattour, A.; Moussa, A.. |
| An analysis of data from a Tunisian farm during the months of June to November of the year 2008 is presented. These data were broken down into two sets the first concern sampled fish while towing them to farm (wild set), the second set concern sampled specimen at the end of fattening process (fattening set). The wild group comprised specimens ranging from 90 to 276 cm fork length, and the fattened group included specimens from 105 to 310 сm. Juvenile proportion (Lf<130 сm) in fattened specimen (15.7%) was considerably smaller compared to the proportion in wild specimens (61,8%). The distribution of individual weights of slaughtered BFT shows the prevalence 31-50 kg specimen class (60.4%). The L-W relationships were determined for each of these sets.... |
| Tipo: Journal Contribution |
Palavras-chave: Thunnus thynnus; Tuna fisheries; Length-weight relationships; Fish farms; Tuna; Fattening. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/5315 |
| |
|
|
| Le Gall, Jy. |
| Tuna world fisheries yield 3 million tons per year; the increase rate of whole production is constant and sustained since 30 years. This original figure for marine fisheries is due to enlargement of tuna fleets and fishing grounds over all the world ocean, the continuous increase of tuna fishing power by in board equipment and remote sensing equipment for searching and scouting (on board, aircraft, satellite, telecommunication_). During the last 20 years, the log-associated tuna fishing has contributed to the local individual and tuna fleets efficiency and fishing power either for large industrial tuna seiners by radio-equipped buoys on natural (debris) or artificial man-made logs. The same trend is noted for numerous artisanal tuna and large pelagic... |
| Tipo: Text |
Palavras-chave: Attracting techniques; Fishing power; Fishing technology; Remote sensing; Tracking; Tuna fisheries; Ultrasonic devices. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00042/15297/12656.pdf |
| |
|
| |
|
| |
|
|
| Pons, Maite; Branch, Trevor A.; Melnychuk, Michael C.; Jensen, Olaf P.; Brodziak, Jon; Fromentin, Jean-marc; Harley, Shelton J.; Haynie, Alan C.; Kell, Laurie T.; Maunder, Mark N.; Parma, Ana M.; Restrepo, Victor R.; Sharma, Rishi; Ahrens, Robert; Hilborn, Ray. |
| Commercial tunas and billfishes (swordfish, marlins and sailfish) provide considerable catches and income in both developed and developing countries. These stocks vary in status from lightly exploited to rebuilding to severely depleted. Previous studies suggested that this variability could result from differences in life-history characteristics and economic incentives, but differences in exploitation histories and management measures also have a strong effect on current stock status. Although the status (biomass and fishing mortality rate) of major tuna and billfish stocks is well documented, the effect of these diverse factors on current stock status and the effect of management measures in rebuilding stocks have not been analysed at the global level.... |
| Tipo: Text |
Palavras-chave: Fisheries management; Marine conservation; Stock assessment; Stock status; Tuna fisheries. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00333/44383/44107.pdf |
| |
|
| |
| Registros recuperados: 134 | |
|
|
|
