| Project/Area Number |
10460079
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| Research Category |
Grant-in-Aid for Scientific Research (B).
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
General fisheries
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| Research Institution | Hokkaido University |
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Principal Investigator |
SAITOH Sei-ichi Hokkaido Univ., Grad. School of Fisheries Sciences, Prof., 大学院・水産科学研究科, 教授 (70250503)
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| Co-Investigator(Kenkyū-buntansha) |
HOKIMOTO Tsukasa Hokkaido Univ., Grad. School of Fisheries Sciences, Inst., 大学院・水産科学研究科, 助手 (00241373)
YONETA Kunisaburo Hokkaido Univ., Grad. School of Fisheries Sciences, Asso.Prof., 大学院・水産科学研究科, 助教授 (50001631)
SAKURAI Yasunori Hokkaido Univ., Grad. School of Fisheries Sciences, Asso.Prof., 大学院・水産科学研究科, 助教授 (30196133)
CHO Kohei Hokkaido Univ., Grad. School of Fisheries Sciences, Asso.Prof., 総合科学技術研究所, 助教授 (90256199)
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| Project Period (FY) |
1998 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥5,700,000 (Direct Cost: ¥5,700,000)
Fiscal Year 2000: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1999: ¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1998: ¥2,400,000 (Direct Cost: ¥2,400,000)
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| Keywords | night light visible image / fishing fleet distribution / Japanese common squid / Pacific saury / Sea surface temperature image / spatial analysis / marine environmental information / migration pattern |
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| Research Abstract |
(1) Processing of DMSP/OLS images and data base generation
We gathered DMSP/OLS images covering Japan Sea and off Sanriku from 1994 to 1999 and generated Data base of fishing fleets distribution.
(2) Processing of satellite sea surface temperature and ocean color images and data base generation
We gathered NOAA/AVHRR, ADEOS/OCTS, Orbview-2/SeaWiFS images covering Japan Sea and off Sanriku from 1994 to 1999 and generated Data base of SST and chlorophyll a.
(3) Investigation of meso-scale eddies using altimeter sea surface height data.
We investigated the distribution of meso-scale eddies, Kuroshio warm core rings (KWCR) and Tsugaru warm current gyres (TWCG), using TOPEX/ERS-2 sea surface height anomaly data.
(4) Statistical analysis of squid fishing fleets distribution
(5) Analysis of the relationship between fishing fleets distribution and SST distribution
We analyzed the position of squid fishing ground and the distanc e from SST fronts.
(6) Observation of fishing fleets distribution from Mt. Hakodate using digital camera
We developed a methodology to analyze from oblique photograph to vertical photograph and could count the number of fishing fleets in a pixel of OLS images.
(7) Analysis of migration routes of Pacific saury
The coalescence of KWCR-93A and TWCG in 1995 and 1998 cut off the intrusion of the first branch of Oyashio as one of the migration routes of Pacific saury. Fishing grounds moved to offshore and it indicated the coalescence was important phenomena changing the migration routes.
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