| Project/Area Number |
08660227
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | FACULTY OF BIORESOURCES,MIE UNIVERSITY |
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Principal Investigator |
KAWAMURA Akito FACULTY OF BIORESOURCES,MIE UNIVERSITY,PROFESSOR, 生物資源学部, 教授 (10111163)
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| Co-Investigator(Kenkyū-buntansha) |
NAITO Yasuhiko NATIONAL INSTITUTE OF POLAR RESEARCH,PROFESSOR, 教授 (80017087)
YOSHIOKA Motoi FACULTY OF BIORESOURCES,MIE UNIV., ASSOCIATE PROFESSOR, 生物資源学部, 助教授 (30262992)
SHIRAKIHARA Kunio FACULTY OF BIORESOURCES,MIE UNIV., PROFESSOR, 生物資源学部, 教授 (90196618)
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| Project Period (FY) |
1996 – 1998
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| Project Status |
Completed (Fiscal Year 1998)
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| Budget Amount *help |
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1998: ¥100,000 (Direct Cost: ¥100,000)
Fiscal Year 1997: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1996: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | HARBOUR PORPOISES / MICRO DATA LOGGERS / HOKKAIDO / RESPIRA-TION METABOLISM / AEROBIC DIVE LIMIT / DIVE SPEED / DIVE SHAPE / DIVING BEHAVIOR / ARGOS SYSTEM / 潜水行動 / 遊泳行動 / 北海道 / ア-カイバルタグ / 位置情報 |
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| Research Abstract |
IN ORDER TO MONITOR THE DIVING BEHAVIOR OF FREE-RANGING CETACEANS.MICRO DATA LOGGERS, WITH RELEASE MECHANISMS, WERE ATTACHED TO THE DOR-SAL FINS OF HARBOR PORPOISES, PHOCOENA PHOCOENA, IN FUNKA BAY, HOKKAI-DO DURING 1993-1997. A TOTAL OF ELEVEN HARBOR PORPOISES WERE TAGGEDWITH MICRO DATA LOGGER WHICH RECORDS TIME-DEPTH INFORMATION, BUT SWIM-KING SPEED WAS ADDED IN LATER YEARS.TWO SUCCESSFULLY RECOVERED LOG-GERS IN 1994, REVEALED 141 HOURS DIVE DATA WHICH INCLUDE DEPTH ANDWATER TEMPERATURE IN 4,871 DIVES.PORPOISES DIVED ALMOST CONTIONUOUSLYRARELY EXHIBITING LONG-TERM REST AT THE SURFACE.MAXIMUM DIVE DEPTHSWERE 98.6 METERS WITH MORE THAN 70% OF DIVING TIME AT 20 METERS ORLESS.MOST SHALLOW DIVES WERE V-SHAPED WITH NO BOTTOM TIME.THE DESCE-NT RATE WAS NOT CONSTANT RELATED TO A FINAL DIVE DEPTHRANGE.ANALYSISSUGGESTED THAT THE PORPOISES HAVE ANTICIPATED THE DEPTH TO WHICH THEYWILL DIVE BEFORE INITIATING THE DIVE ITSELF.MATABOLISM OF OXYGEN SUG-GESTED THE PORPOISES USUALLY DIVE UNDER THE AEROBIC DIVE LIMITS.
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