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| Hallier, J.P.; Michaud, P.. |
| Since 1983, tuna purse seine fishery has increased rapidly in the Indian Ocean. This fishery, being mostly based in Seychelles, represents an excellent opportunity to this country. However, it is essential that a good management strategy be adopted in order to ensure the rational exploitation of the resources. Since this fishery is in its early stage of development, it is not yet possible to obtain an accurate assessment of the stocks based on usual stock assessment methods. Nevertheless, from existing knowledge on the Indian and Atlantic oceans, a preliminary analysis of the resources is attempted. Of the two stocks studied, the skipjack, known as an opportunist species, can support a higher exploitation rate than the yellowfin. It would seem that catches... |
| Tipo: Book Section |
Palavras-chave: SEYCHELLES; INDIAN OCEAN; SCOMBRIDAE; FISHERY DEVELOPMENT PURSE SEINING THUNNUS ALBACARES Fishery management Fishery management. |
| Ano: 1986 |
URL: http://hdl.handle.net/1834/1269 |
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| Hallier, J.P.; Sabadach, B.. |
| From 1986 to 1991, observers on board tuna purse-seiners based in Seychelles allow analysis of data such as oceanographic parameters, aspects of tuna schools and their associated sightings, as well as fishing characteristics (success rate, catches, cpue, species composition, duration of fishing sets). Performances of the four concerned countries (France, Spain, Japan, USSR) are compared. |
| Tipo: Report |
Palavras-chave: Fishing effort; Purse seines; Seychelles KATSUWONUS PELAMIS THUNNUS OBSESUS THUNNUS ALBACARES Catch composition Catch/effort Environments Fishery biology Catch composition Fishery biology http://aims.fao.org/aos/agrovoc/c_1384 http://aims.fao.org/aos/agrovoc/c_2937. |
| Ano: 1993 |
URL: http://hdl.handle.net/1834/1354 |
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| Hallier, J.P.; Michaud, P.. |
| Since 1983, tuna purse seine fishery has increased rapidly in the Indian Ocean. This fishery, being mostly based in Seychelles, represents an excellent opportunity to this country. However, it is essential that a good management strategy be adopted in order to ensure the rational exploitation of the resources. Since this fishery is in its early stage of development, it is not yet possible to obtain an accurate assessment of the stocks based on usual stock assessment methods. Nevertheless, from existing knowledge on the Indian and Atlantic oceans, a preliminary analysis of the resources is attempted. Of the two stocks studied, the skipjack, known as an opportunist species, can support a higher exploitation rate than the yellowfin. It would seem that catches... |
| Tipo: Book Section |
Palavras-chave: SEYCHELLES; INDIAN OCEAN; SCOMBRIDAE; FISHERY DEVELOPMENT PURSE SEINING THUNNUS ALBACARES Fishery management Fishery management http://aims.fao.org/aos/agrovoc/c_24026. |
| Ano: 1986 |
URL: http://hdl.handle.net/1834/1269 |
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| Sabatié, R.; Marsac, F.; Hallier, J.P.; Potier, M.; Lucas, V.; Ménard, F.. |
| The trophic relations of two apex predators, yellowfin and bigeye tuna (Thunnus albacares and T. obesus), and their prey were investigated in the western tropical Indian Ocean. The contents of 173 non-empty stomachs were analysed from specimens caught with longlines and purse seine during scientific and fishing cruises. Diet data were processed by occurrence, by number, and by wet weight and a comparison of diets between surface and deep swimmers made. Crustaceans were the almost exclusive food source of surface-swimming bigeye tuna, with the stomatopod (Natosquilla investigatoris) being the sole prey item recorded in this category. The diet of deep-swimming yellowfin tuna was balanced between epipelagic fish, crustaceans and cephalopods. Bigeye tuna fed... |
| Tipo: Journal Contribution |
Palavras-chave: ANALYSIS; Diets; Tuna fisheries; Analysis; Tuna; Fisheries; Http://aims.fao.org/aos/agrovoc/c_8003; Http://aims.fao.org/aos/agrovoc/c_2934. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/1091 |
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