The Oceanographic Research in the Southern Region of the Hawaiian Islands VII
The oceanographic observations and the tuna fishing experiments in the southern region of theHawaiian Islands were carried out in May 1984. The results are summarized as follows:1) The mean values of temperature and salinity were about 26.0°C and 35.23% in the surfacewater, about 24.9°C and 35.34% i...
| Main Authors: | , , , |
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| Format: | Report |
| Language: | English |
| Published: |
鹿児島大学
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10232/13299 https://ir.kagoshima-u.ac.jp/?action=repository_uri&item_id=10809 https://ir.kagoshima-u.ac.jp/?action=repository_action_common_download&item_id=10809&item_no=1&attribute_id=16&file_no=1 |
| Summary: | The oceanographic observations and the tuna fishing experiments in the southern region of theHawaiian Islands were carried out in May 1984. The results are summarized as follows:1) The mean values of temperature and salinity were about 26.0°C and 35.23% in the surfacewater, about 24.9°C and 35.34% in the subsurface saline water, and about 7.6°C and 34.14% in the subarctic intermediate water, respectively.2) Salinity of the surface water being higher than usual was remarkable. It apparently suggeststhat the anticlockwise meso-scale vortex existed.3) The highest catch of marlin was made on Nos. 1 and 5 hooks, and that of albacore on No. 3 hook.4) The actual depths of Nos. 1 and 5 hooks ranged between 95 m and 115 m, Nos. 2 and 4 hooksbetween 100 m and 145 m, and No. 3 hook between 120 m and 205 m.5) The good catches of marlin were estimated to be at the depths of 95 m-105 m or less andthat of albacore 180 m-205 m or more.6) The survey value was larger than the catenary value on No. 1 hook, while the former was smallerthan the latter on Nos. 2 and 3 hooks.7) Mean value of difference between the catenary and the survey values on each hook was-2.9 m on No. 1 hook, 20.6 m on No. 2 and 29.2 m on No. 3. |
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