Published in : 1980 (Report on results of the N/O Coriolis cruise for the evaluation of pelagic fish resources in Seychelles waters (September-November 1979).). Marchal,-E.; Varlet,-F.; Stequert,-B.; Conand,-F. B (Book) 1980. 20 pp Echo survey were carried out in the Seychelles waters in order to evaluate the pelagic fish resources. The methods and procedures adopted for the survey are described. Results indicated that the Decapterus stocks are abundant. Albacore, Thunnus albacares and bonito, Euthynnus affinis were found to a certain extent throughout the Seychelles plateau, but they appeared more abundant in November than October. Stocks from the area of the Amirantes Islands were the richest in comparison with the rest of the Seychelles archipelago. Oceanographic data for the area surveyed is given in tables. The feeding of the yellowfin tuna Thunnus albacares- (Bonnaterre) and bigeye tuna Thunnus obesus- (Lowe) in the equatorial zone of the Indian Ocean. Kornilova,G.N.-(AzCherNIRO,-Kerch'-,-USSR) J (Journal-Article) Vopr.-Ikhtiol., 1980 20(6), 897-905 Fish was found to account for the highest percent of the total weight of the food consumed by the tunas, with cephalopods and crustaceans consumed to a lesser degree. Different combinations of food organisms with 1 or 2 predominant components were observed in different areas. The food similarity of the 2 species decreased with depth. Exploratory fishing for baitfish along the Indian Ocean coast. Pimolchinda,J.; Singhagraiwan,T.-(Address-not-stated) J (Journal-Article) Thai-Fish.-Gaz., 1980 33(2), 153-165 Exploratory fishing for baitfish species suitable for pole and line tuna fishing was carried out by RV Pramong 3-, along the Indian coast from Phuket to the Malaysian border. The predominant bait species taken by lift net were Stolephorus heterolobus- and silverside Allanetta forskali- which were mainly found at Koh Ka in Phang nga Bay. The availability and abundance of other species has not yet been determined. S. heterolobus- appears to be the more suitable baitfish species for pole and line tuna fishing. (The isles of the Indian Ocean: Budget and perspectives of fisheries development.). B (Book) PARIS-FRANCE-DPA 1980. 101 pp DOSSIERS-D.P.A.-SER.-PRODUITS-PAYS. The development of marine and continental fisheries of the Indian Ocean Islands is discussed, with respect to increasing the small fisheries production and to the development of the modern commercial fishery. Topics considered include: 1) fishery production (traditional and artisanal); 2) water potentials for prawn, lobsters, crabs and crayfish, demersal fish, pelagic fish (tuna) and molluscs; 3) rearing; and 4) marketing of products. Tuna Statistics Indo-Pacific and Indian Ocean. Skillman,-R.A. B (Book); N (Num 1980. 91 pp As part of a FAO/UNDP project, a consultant was engaged to assist the governments in the Indian and Pacific ocean area in the preparation for long-term management of tuna and tuna-like species. This report summarizes the progress made by the tuna management specialist on assembling tuna statistics for Indian Ocean and Indo-Pacific fisheries and includes a proposal for a computer and data management means of making these statistics available to the fisheries scientists associated with the IOFC and IPFC. Feeding of yellowfin tuna, Thunnus albacares , bigeye tuna, Thunnus obesus , in the equatorial zone of the Indian Ocean. Kornilova,-G.N. J (Journal-Article) J.-ICHTHYOL. 1980. vol. 20, no. 6, pp. 111-119 A study was made of the feeding of yellowfin tuna, Thunnus albacares , and of bigeye tuna, T. obesus , caught during the summer in the equatorial zone of the Indian Ocean, from areas in which tunas had high indices of fullness. Fish is the greatest percentage by weight in the food of tunas; cephalopods and crustaceans account for smaller percentages. In some parts of the zone there are various combinations of forage organisms with 1-2 dominant organisms in the food of tunas. Competition for the same prey is reduced in the 2 tuna species by feeding at different depths. A study on the relative growth of yellowfin tuna, Thunnus albacares , and bigeye tuna, Thunnus obesus , taken by Korean tuna longliners in the Indian Ocean. Lee,-J.U.; Kim,-B.Y.; Yang,-W.S. J (Journal-Article) BULL.-FISH.-RES.-DEV.-AGENCY,-BUSAN. 1980. no. 23, pp. 187-195 Some biological data such non-meristic characteristics as fish length, head length and body weight for the Indian yellowfin Thunnus albacares ) 5,553 specimens and bigeye tuna (T. obesus ) 8,917 specimens were collected from Korean tuna longliners operated in the fishing area, N 10 degree similar to S 15 degree in 1978, and the data were used to fit the relative growth's equation and also calculated the correlation coefficient(r). The results obtained are summarized. Wednesday, August 18, 1999 Page 1 of 122 Published in : 1981 Status report: Billfishes in the Indian Ocean. Yoshida,-H.O. B (Book) STATUS-REPORTS-ON-WORLD-TUNA-AND-BILLFISH-STOCKS.-PROCEEDINGS-OF-SECOND-TUNA-RESEARCH- WORKSHOP-HELD-AT-SAN-CLEMENTE,-CALIFORNIA-USA,-ON-DECEMBER-15-17,-1980. National-Marine-Fisheries- Serv.,-La-Jolla,-CA-USA.-Southwest-Fish.-Cent 1981. pp. 118-141 NOAA-TECH.-MEMO. Billfishes are caught primarily as a by-catch on longline gear set to catch tunas in the Indian Ocean. Most of these billfishes appear to be sold in Japan where striped marlin brings the highest price, followed by swordfish, blue marlin, and black marlin. Tentative results from production model analyses indicate that no significant increase in total yield can be expected for blue and black marlin, whereas striped marlin yields could increase with increased effort. Swordfish and sailfish stock do not appear to be adversely affected by current levels of fishing efforts. Additional statistics must be collected from the fleets of participating nations to give a clearer picture of stock status in these waters. Status report: North Pacific bluefin tuna. Hanan,-D.A. B (Book) STATUS-REPORTS-ON-WORLD-TUNA-AND-BILLFISH-STOCKS.-PROCEEDINGS-OF-SECOND-TUNA-RESEARCH- WORKSHOP-HELD-AT-SAN-CLEMENTE,-CALIFORNIA-USA,-ON-DECEMBER-15-17,-1980. National-Marine-Fisheries- Serv.,-La-Jolla,-CA-USA.-Southwest-Fisheries-Cent LA-JOLLA,-CA-USA-NOAA-NMFS 1981. pp. 246-255 NOAA-TECH.-MEMO. Northern Pacific bluefin tuna are fished by surface gear including purse seine, trolling, bait, gill net, trap, and harpoon in the eastern and western Pacific. Bluefin are also caught by longline in the western Pacific and, to a lesser extent, in the central and eastern Pacific and the east Indian Ocean. The resource appears to be composed of a single stock; the western Pacific catch is composed of juveniles and mature adults while the eastern Pacific stock consists mainly of 1-, 2-, and 3-year old fish. Presence of a second stock off New Zealand is not confirmed by studies. Mercury in fish of the Republic of Seychelles and hair and blood mercury levels of part of the population exposed to methyl mercury through fish consumption. Matthews,-A.D. B (Book) FISH.-BULL.-FISH.-DIV.-SEYCHELLES. 1981. no. 9, 62 pp A total mercury survey of twelve important fish species has been completed - these are: Yellowfin tuna, Skipjack tuna, Dogtooth tuna, Bonito, Carangue balo, Becune, Sailfish, Kingfish, Bourgeois, Vara Vara, Vielle platte and Job. Methyl mercury contents were also analysed. The results obtained should be consulted whenever export of any of these species is considered since various countries have "Maximum permissable mercury values in fish for human consumption". A small survey of mercury in the hair of fishermen and mothers and their new born babies has also been carried out. Purse seine trials off Mahe for small pelagic fish 1973. Ratcliffe,-C. B (Book) FISH.-BULL.-FISH.-DIV.-SEYCHELLES. 1981. no. 1, 9 pp The introduction of purse seining for small pelagic fish species in Seychelles' waters in May 1973 by a French tuna clipper and subsequent day and night fishing trials by the Fisheries Division demonstrated the effectiveness of this method. The results of trials, conducted between June and December 1973, are reported here and descriptions are given of the equipment used and the operational techniques employed. The apparent reactions of the three main fish species -- maquereau doux (Rastrelliger kanagurta ), maquereau gros yeux or teka (Selar crumenophthalmus ) and sardine de france (Sardinella sirm )--caught at night to different intensity attraction lights are also considered. Longlining in Seychelles exclusive economic zone 1980/1981. Harris,-A. B (Book) FISH.-BULL.-FISH.-DIV.-SEYCHELLES. 1981. no. 17, 21 pp A total of 4,742 tons of tuna and related species were caught by licensed longline vessels in Seychelles Exclusive Economic Zone in a period of 8 months starting in November 1980 and terminating in June 1981. Altogether, a total of 93 licenses were issued for periods of 1 to 4 months representing a licensed tonnage of 82998.75 tons and deriving a revenue of SR4,149,937. The total value of the catch, calculated using prices at the time is estimated at around US $15.7 million. Fishing took place predominantly in the northern and eastern parts of the E.E.Z. with vessels obtaining a season mean catch rate of 1.13 tons per day. Highest monthly mean catch rates were obtained in November and in May whilst December, January, February and June produced the largest monthly catches. Katsuobushi production in the Seychelles. Matthews,-A.D. B (Book) FISH.-BULL.-FISH.-DIV.-SEYCHELLES. 1981. no. 19, 12 pp Technical help has been offered by the Japanese for the setting up of a Katsuobushi industry in the Seychelles. This industry would create considerable employment in the Seychelles and, because of the high added value, considerable financial benefit would accrue to the Seychelles.