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| Registros recuperados: 63 | |
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| Rouyer, Tristan; Bonhommeau, Sylvain; Giordano, F; Wendling, B; Ellul, S; Ellul, G; Psaila, Ma; Deguara, S; Bernard, S; Kerzerho, V. |
| Tipo: Text |
Palavras-chave: Large atlantic bluefin tuna; Mediterranean; Malta; Electronic tagging; Farming cages; Purse seiners. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00484/59609/62626.pdf |
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| Pascual-alayon, P; Floch, Laurent; N'Gom, F; Dewals, P; Irie, D; Amatcha, Ah; Amande, M-j. |
| The document presents an overall summary of the fishing activities of the European and assimilated purse seine and bait boat fleets operating in the eastern Atlantic Ocean over the period 1991-2017. We describe the annual changes in fleet technical characteristics (carrying capacity, size), fishing effort (fishing and searching days), extent of fishing grounds, catches and nominal Catch per Unit Effort by species, as well as the average individual weight by species. Maps are also presented indicating the fishing effort distribution in the Atlantic, as well as the spatio-temporal distribution of European and assimilated purse seine catches in 2017 compared to previous years (2010-2016). |
| Tipo: Text |
Palavras-chave: Tuna fishery; Yellowfin; Skipjack; Purse seiners; Catch/effort; CPUE; Species composition; Size composition. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00490/60190/63533.pdf |
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| The number of purse seiners active in the western Indian Ocean averaged 53 during the first quarter compared to 41 vessels during the same period last year. Fishing activity was high during the first half of the year with a record for the month of March of 55 licensed vessels. The fishing results for the first quarter were not as good as those previously recorded in the last three years, however there are still 28 logbooks outstanding at the time of publication. Catch rates averaged 14.6 MT/day compared to 22MT/day in 1991 and 26MT/day in 1990. The high number of vessels licensed during the first quarter can be attributed to increased number of licenses issued to French and Japanese vessles. 1992 has been a notably strong El Nino year, giving rise to a... |
| Tipo: Other |
Palavras-chave: Purse seiners; Tuna fisheries; Catch statistics. |
| Ano: 1992 |
URL: http://hdl.handle.net/1834/5212 |
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| Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels that are licensed to fish in the Seychelles EEZ and from data collected via the tuna sampling programme conducted during transhipment in port Victoria. Sometimes there is a delay in these being received at SFA, especially during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel. Readers should note that many of the figures presented here are subject to revision (usually upwards) as more data become available. The date upon which the SFA database was closed prior to the generation of the statistical tables is shown at the head of each table. PURSE SEINERS... |
| Tipo: Other |
Palavras-chave: Purse seiners. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/5189 |
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| The number of purse seiners active in the Western Indian Ocean during the third quarter of 1986 stabilized at 33 vessels. This is comparable to the 34 vessels licensed in September of last year. As determined from purse seiner logbooks collected up to the end of September, catch rates improved considerably from the first and second quarter 1986 though not reaching the level of the first quarter of 1984. The proportion of yellow fin in the catch was also lower than the previous years. In the first half of 1986, the seasonal variation in the distribution of fishing effort and in the species composition of the catch differed from previous years. In the past, yellow fin was the dominant species from November through July, at this period most of the fleet... |
| Tipo: Other |
Palavras-chave: Purse seiners; Tuna fisheries. |
| Ano: 1986 |
URL: http://hdl.handle.net/1834/5192 |
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| The number of purse seiners active in the Western Indian Ocean during the first quarter of 1986 decreased from 38 in January to 36 in March, down from 49 vessels present during the same quarter in 1985. Fishing success during the first quarter of 1986 was higher than the first quarter of 1985, though not reaching the level of the first quarter of 1984.In past years, an increase in the proportion of yellow fin caught, compared to skipjack, has been observed to occur during the onset of the north-west monsoon in November and continued through July, only broken by a drop during April. In 1985 the increase did not commence until December. During January and February 1986, the proportion of yellow fin was high, but dropped during March, a month earlier than... |
| Tipo: Other |
Palavras-chave: Purse seiners; Tuna fisheries. |
| Ano: 1986 |
URL: http://hdl.handle.net/1834/5182 |
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| Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels that are licensed to fish in the Seychelles EEZ and for purse seiners, as well as from data collected via the tuna sampling programme conducted during transshipment in Port Victoria. Sometimes there are delays in these being received at SFA, especially for longliners that often spend up to a year at sea, and for purse seiners the delays are usually during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel and are not necessarily using Port Victoria for transshipment. |
| Tipo: Report |
Palavras-chave: Tuna fisheries; Purse seiners; Catch statistics; Longlining; Tuna; Fisheries data. |
| Ano: 2007 |
URL: http://hdl.handle.net/1834/5304 |
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| Seychelles Fishing Authority. |
| Due to the inclusion of trips which started at the end of 1993 but which finished in early 1994 the 1993 total catch for the WIO has been revised upwards from 263,918 MT, published in the last Tuna Bulletin, to 275,058 MT. The initial estimate for the total WIO purse seine tuna catch for the first three months of 1994 is 61,159 MT (the figure of 70,000 MT published in the Globefish Bulletin 2/94 was based on an early estimate). However, this figure may also be revised upwards when trips starting in the first quarter of 1994 and finishing in second quarter are included in the next quarterly Tuna Bulletin of 1994. This compares with 71, 142 MT caught in the first three months of 1993. Some 2,173 days were fished in the first quarter of 1994 compared to... |
| Tipo: Other |
Palavras-chave: Purse seiners; Tuna fisheries. |
| Ano: 1994 |
URL: http://hdl.handle.net/1834/5179 |
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| Thomas, A.; Dufour, O.; Pianet, R.; Morón, J.. |
| The present data-recording system used in the Seychelles to compile the tuna purse-seine statistics in the WIO was established by ORSTOM at the beginning of the fishery (1982/3) for the French fleet, and then extended to the Seychelles Fishing Authority (SFA) and Madagascar in 1991-92 for all fleets. After several modifications, it has been working efficiently for the last ten years, making it possible to build a very comprehensive tuna database for the purse-seine fleets since the beginning of the fishery. The extension to Madagascar started in 1992, within the framework of the Regional Tuna Project. A specific laboratory, the(Unité Statistique Thonière d’Antsiranana (USTA) was installed, the work being done in collaboration between ORSTOM, the Direction... |
| Tipo: Report |
Palavras-chave: Fishery statistics; Purse seiners; Fishery data. |
| Ano: 1995 |
URL: http://hdl.handle.net/1834/515 |
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| Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels which are licensed to fish in the Seychelles EEZ. Spmetimes there is a delay in these being received at SFA, especially during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel. Readers should be aware that many of the figures presented here (especially the most recent) are subject to revi¬sion (usually upwards) as more data become available. The date upon which the SFA database was closed prior to the generation of the statistical tables is shown at the head of each table. Purse seiners. PRINCIPAL POINTS: The total purse seine tuna catch for the Western Indian... |
| Tipo: Other |
Palavras-chave: Purse seiners; Catch statistics; Tuna fisheries. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/5197 |
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| The number of purse seiners active in the Western Indian Ocean increased from a low of 41 at the end of the last quarter to 45 vessels in September. Fishing results improved slightly with daily catch rates for the third quarter averaging 22 MT, increasing from 17.7 MT/day in August to 31.5 MT/day in September. These results are considerably better than those for the same period last year when it averaged 16 MT/day. The fishing pattern for the third quarter showed that fishing effort was concentrated between 5 degrees north and 5 degrees south of the Equator in the vicinity of the Northern sector of the Seychelles EEZ. Fifty five percent of the third quarter catch was made up by skipjack tuna compared to 58% for the second quarter. This is partly due to... |
| Tipo: Other |
Palavras-chave: Purse seiners; Tuna fisheries. |
| Ano: 1990 |
URL: http://hdl.handle.net/1834/5174 |
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| The number of purse seiners active in the western Indian Ocean average 41 during the fourth quarter compared to 49 vessels during the same period last year. Fishing activity was high during the first half of the year with a record of 54 vessels present in February and March. The overall fishing results for the year were not as good as those previously recorded in the last three years. Catch rates averaged 16MT/day compared to 18 MT/day in 1989 and 22 MT/day in 1988, attaining a similar level to results of 1986. This was due to poor fishing conditions during January to May causing several vessels to leave the Indian Ocean in June. However this situation changed as catch rates improved during the second half of the year, with exceptionally high yellow... |
| Tipo: Other |
Palavras-chave: Purse seiners; Tuna fisheries. |
| Ano: 1990 |
URL: http://hdl.handle.net/1834/5207 |
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| Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels that are licensed to fish in the Seychelles EEZ. Sometimes there is a delay in these being received at SFA, especially during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel. Readers should be aware that many of the figures presented here (especially the most recent) are subject to revision (usually upwards) as more data become available. The date upon which the SFA database was closed prior to the generation of the statistical tables is shown at the head of each table. PURSE SEINERS PRINCIPAL POINTS: The total purse seine tuna catch for the Western Indian... |
| Tipo: Other |
Palavras-chave: Purse seiners; Catch statistics; Tuna fisheries. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/5214 |
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| Data used to generate the Tables and Figures presented in this report are based on logbook returns from the fishing vessels. Readers should, therefore, be aware that figures presented in this report are likely to change in future publications of the Tuna Bulletin once all the data relating to the quarter being reported on becomes available. The initial estimate for the total WIO purse seine tuna catch for the first nine months of 1994 is 176,216 Mt. However, this figure may also be^ revised upwards when trips starting in the third quarter of 1994 and finishing in the fourth quarter are included in the next quarterly Tuna Bulletin of 1994. This compares with 203,797 Mt caught in the first nine months of 1993. Some 2,532 days were fished in the third quarter... |
| Tipo: Other |
Palavras-chave: Purse seiners; Tuna fisheries. |
| Ano: 1994 |
URL: http://hdl.handle.net/1834/5176 |
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| Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels that are licensed to fish in the Seychelles EEZ and for purse seiners, as well as from data collected via the tuna sampling programme conducted during transshipment in Port Victoria. Sometimes there are delays in these being received at SFA, especially for longliners that often spend up to a year at sea, and for purse seiners the delays are usually during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel and are not necessarily using Port Victoria for transshipment. |
| Tipo: Report |
Palavras-chave: Tuna fisheries; Catch statistics; Purse seiners; Longlining; Fishery data; Tuna. |
| Ano: 2009 |
URL: http://hdl.handle.net/1834/5306 |
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| The number of purse seiners active in the Western Indian Ocean during the fourth quarter of 1985 increased from 36 in October to 38 in December, about ten vessels less than in the fourth quarter of 1984. Fishing success during the fourth quarter of 1985 was similar to the third quarter, and slightly better than the fourth quarter last year. Since commercial purse seiner operations began in 1982, catch rates have been high during the first quarter, then have declined progressively during the second and third quarters due to weather conditions of the Inter-Monsoon and the Southeast Monsoon periods. This year, however, catch rates during the first quarter were low, due largely to bad weather, then remained at roughly the same level for the second quarter,... |
| Tipo: Other |
Palavras-chave: Purse seiners. |
| Ano: 1985 |
URL: http://hdl.handle.net/1834/5167 |
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| Seychelles Fishing Authority. |
| The number of purse seiners active in the Western Indian Ocean during the third quarter of 1989 increased from 46 vessels in June to 48 in July reaching an all-time high of 51 in September. The highest number of vessels previously recorded for this fishery was 49, between December 1984 to February 1985, and in early 1989. During the same period last year a maximum of 46 vessels were in operation.Poor fishing results obtained during the second quarter continued throughout July and August, with daily catch rates averaging 11-13 MT. In September, however, fishing success improved considerably with catch rates rising to 26.5 MT/day, nearly reaching the level obtained (30 MT/day during the same period last year. Skipjack remained the predominant species in... |
| Tipo: Other |
Palavras-chave: Purse seiners; Tuna fisheries. |
| Ano: 1989 |
URL: http://hdl.handle.net/1834/5201 |
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| The number of purse seiners active in the Western Indian Ocean increased to 51 during the last quarter of 1989, to peak at 52 vessels in November, this being the highest number of vessels recorded in this fishery so far. During the same period last year the number of vessels in operation increased from 43 in October to 48 at the end of the year. The overall fishing performance of the fleet throughout the year is comparable to that obtained in previous years. The fishing results however were not as good as that obtained during 1988. Daily catch rates averaged 18.6 MT, compared to 22 MT in 1988 and 17.9 MT in 1987. Skipjack was the predominant species caught, comprising 67% of the catch with a corresponding marked decrease in the proportion of yellow fin... |
| Tipo: Other |
Palavras-chave: Purse seiners; Tuna fisheries. |
| Ano: 1989 |
URL: http://hdl.handle.net/1834/5204 |
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| Data used to generate the tables and figures presented here are based on daily catch and effort forms (logbooks) returned from fishing vessels that are licensed to fish in the Seychelles EEZ and for purse seiners, as well as from data collected via the tuna sampling programme conducted during transshipment in Port Victoria. Sometimes there are delays in these being received at SFA, especially for longliners that often spend up to a year at sea, and for purse seiners the delays are usually during and just after the second quarter of the year when most vessels are fishing in the Mozambique Channel and are not necessarily using Port Victoria for transshipment. |
| Tipo: Report |
Palavras-chave: Tuna fisheries; Purse seiners; Catch statistics; Longlining; Fishery data; Tuna. |
| Ano: 2009 |
URL: http://hdl.handle.net/1834/5307 |
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| This volume of tuna statistics for the West Indian Ocean (WIO) is the second to be based on the "New tuna" program. It includes the figures for 1992 as well as 1993. Due to the necessity of rapidly publishing 1993 statistics only one volume has been produced for the whole year and not one for each quarter. In future the whole year and not one for each quarter. In future the system of publishing a Tuna Bulletin each quarter will be reverted to. Due to the inclusion of trips which started at the end of 1992 but which finished in early 1993 the 1992 total catch has been revised upwards from 273,852 MT. published in the last Tuna Bulletin to 278,218 MT. The initial estimate for the total WIO purse seine tuna catch for 1993 is 263,918 MT. However, this... |
| Tipo: Other |
Palavras-chave: Purse seiners; Tuna fisheries. |
| Ano: 1993 |
URL: http://hdl.handle.net/1834/5171 |
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| Registros recuperados: 63 | |
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