Fiscal Year
2013
Title
Research on distribution, behavior and population structure of biological resources
Project and Theme
Project 3. Research on factors controlling open ocean benthopelagic ecosystem dynamics
Representative Organization: Japan Agency for Marine-Earth Science and Technology
Theme2. Research on distribution, behavior and population structure of biological resourcesRepresentative person | Katsunori Fujikura |
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Organization | Japan Agency for Marine-Earth Science and Technology |
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Department | Eastern Japan Marine Ecosystems Dynamics Project team |
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Research InformationPeriod and Interval2013/07/01 - 2014/03/31
Research Area
Off Tohoku, Pacific
CategoryOthers
OverviewTo contribute earthquake disaster reconstruction, we conduct marine biological and ecological researches including structure of biological resources in open ocean benthopelagic ecosystem off Sanriku.
Overview of the Observation
Research Point Table
Point | Name | Abashiri |
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Coordinates | 44.881667,144.437 |
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Name | Kamaishi 1 |
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Coordinates | 39.298183,142.210733 |
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Name | Kamaishi 2 |
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Coordinates | 39.090833,142.159683 |
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Research Point Map & Track Chart Map & Point List
Results and Future PlanOtoliths of 27 individuals collected off Kamaishi and of 30 individuals collected off Abashiri were analyzed. Based on the otolith data, the age range of the sample population from Kamaishi was 3-14 years old, while the Abashiri sample population consisted of individuals of ages 10 years and above, and more than half of the population was >=15 years old.Ten-, 11-, and 14-year-old individuals were observed in both the Abashiri and Kamaishi populations. However, the size of the Abashiri individuals was significantly larger than that of the age-matched Kamaishi individuals. The difference in dietary environment between the Pacific coast of Tohoku and the Sea of Okhotsk might be reflected in the variations in body size between the sample populations from the areas off Kamaishi and off Abashiri.
Investigation Item and Data Acquisition
Investigation Item | Data Acquisition |
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Otolith analysis | Year class based on otolith data |
Reference
Related Observation Plan
Related Observation Data
Person in charge of Investigation
Representative person | Kiyotaka Takishita |
Organization | Japan Agency for Marine-Earth Science and Technology |
Department | Eastern Japan Marine Ecosystems Dynamics Project team |
Keywords
Fiscal Year | 2013 |
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Organization | Japan Agency for Marine-Earth Science and Technology |
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Category | Others |
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Research Area | North Sanriku
South Sanriku
Off Tohoku
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Discipline | Ocean biology / Ocean ecology -> Fishes
Ocean biology / Ocean ecology -> Arthropods
Ocean biology / Ocean ecology -> Mollusks
Ocean biology / Ocean ecology -> Others
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