Implication of modern technology to geographical distribution of Japanese diving-fishing.
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概要
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A questionnaire survey of Fishing Cooperatives in Japan, more than 2, 000 in number, disclosed details of geographical distribution and harvests associated with the activities of ama, or breath-hold diving fishermen, and with diving with modern apparatus. The findings include recognition of the development of diving-fishing associated with technological innovations, seen in the use of wetsuits by breath-hold divers, and in the utilization of new diving apparatus, i. e., hard-hat-helmet, mask-andhose, and SCUBA. The use of wetsuits is prevalent in breath-hold divers at sea-water temperatures below 26°C. Taking into account KOHARA'S (1963, 1975) hypothesis that the zone in the vicinity of 25°C in August was the predominant one with female divers because of their higher cold-tolerability, the wetsuit proved advantageous for expanding diving-fishing into colder areas. The utilization of new apparatus enabled the divers to work in cold water and sandy sea bottom areas, neither of which could be fully exploited using breath-hold diving. Such technological innovations may meet with restrictions in relation to environment-resources, for instance, resources overexploitation.
- 人類働態学会の論文
人類働態学会 | 論文
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