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DocumentSummary report on cruise of the R/V Shoyo Maru in the North Arabian Sea, 2 October 1975 - 14 January 1976 1976
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No results found.As reported in the Fourth Session of the IOFC Executive Committee held in Rome in October 1974, the efforts of IOP in bringing the R/V Shoyo Maru to participate in the North Arabian Sea survey succeeded when the vessel undertook cruises along the waters of Pakistan in November/December 1975. The present paper gives a brief description of the survey and its results, summarized from the original report in Japanese which has been published by the Fishery Agency of Japan in July 1976. The activities covered oceanographic observation, conventional biological survey (sighting of pelagic shoals and collection of fishes) and acoustic survey. A rendez-vous with the R/V Dr. F. Nansen, the main vessel for the North Arabian Sea survey, for calibration of acoustic instruments was a special feature of the survey. The up-welling supposedly to be remnant of the southwest monsoon phenomenon was located at 23°N, 63°E as late as November during the year of survey. Another up-welling noticed in the vicini ty of 24°N, 66°E was interpreted as one inherent to the continental slope. The pelagic shoals appeared rather scarce in the offshore waters covered by the vessel and the demersal fishes were located mainly in the continental slope. The demersal catch included longspine seabream, giant catfish, Jarboua therapon, threadfin breams, brushtooth lizardfish and sweetlips. Indications of substantial stock of squids were noticed in the offshore waters around the up-welling area. The squids appear to sink to deeper layers of 100-350 mt during daytime and move to the upper layer at night and are easily hooked by jigs. -
DocumentPlan for a pelagic fish assessment survey, North Arabian Sea 1973
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No results found.In the plans for resource assessment surveys of the Indian Ocean Fishery Survey and Development Programme, the highest priority has been given to a survey of the pelagic resources off the North Arabian Sea. The main aim of this survey, based primarily on acoustic observations of fish, is to provide information on the identity and size of the major stocks and their exploitable level, the main patterns of distribution and their general life history and behaviour. Even though problems of target ide ntification still exist, the usefulness of acoustic methods has been demonstrated in a number of applications. This plan describes the instruments and tools to be used for the survey and also discusses the principles of the methods to be employed. The efficiency of a survey is limited by weather and ship size. A ship of not less than 150ft in length is recommended and it is assumed that the survey based on echo-sounding and trawling can be carried out through the whole year with the exception of the month of July, when the monsoon is at its peak. Because of the poor knowledge of fish distribution and behaviour in the Arabian Sea the survey coverage should be as frequent as possible and should extend over one year in order to compensate for annual variations in abundance and distribution of stocks. To provide adequate coverage, two vessels will be required for two years on the basis of 200 to 220 days of work per year. Close coordination with other surveys and investigations in the area should be established and the investigatory methods standardized. While the study of the physical and chemical processes of the Arabian Sea are not given high priority, such processes will be observed as part of the study of the nexus between distribution and behaviour of fish and environmental factors, as well as for their general oceanographic value. All data and observations will be logged on special forms, processed on a seasonal and area basis and evaluated. Quarterly reports will be submi tted and a status report prepared after one year of operation. -
ProjectPelagic Fishery Investigations on the Southwest Coast - phase 2, India. Distribution and abundance of marine fish resources off the Southwest Coast of India (Results of acoustic surveys, 1976-78)
Pelagic Fishery Investigation on the South-West Coast, India, IND/75/038
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No results found.This is one of a series of reports prepared during the course of the FAO/UNDP project identified on the title page. The conclusions and recommendations given in the report are those considered appropriate at the time of its preparation. They may be modified in the light of further knowledge gained at subsequent stages of the project.
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