Study of Tuna Clippers on their Fishing Abilities with Classifying Tonnage-II

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  • 漁ろう性能上からみた屯数別鮪漁船の考察II(日本航海学会第28回講演会)
  • 漁ろう性能上からみた屯数別鮪漁船の考察-2-
  • ギョロウ セイノウ ジョウ カラ ミタ トンスウ ベツ マグロ ギョセン ノ コウサツ 2

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Abstract

As the catch of tuna long line fishing decrease near Japan, the clippers must go out deep sea fishing for the sake of compensating the loss of ecoonomy. Consequently they have a tendency to become larger and larger, and to have a large power engine. But large ships are not always effective since there is no difference in fishing method between the large and the small boat except the numder of basket of long line. Essentially, there should be an opposite properties between the fishing ability and navigational requirements in fishing boat, and so, we have limitted allowance to satisfy both requirements. The author collected the data of tuna long line fishing boats more than 50 in number and tried to solve in this problem on the view point of both economical and fishing ability.

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