Fiscal Year
2012
Title
Survey of the deep-sea ecosystem and debris mapping in Off Sanriku -ROV-
Project and Theme
Project 3. Research on factors controlling open ocean benthopelagic ecosystem dynamics
Representative Organization: Japan Agency for Marine-Earth Science and Technology
Theme1. Research on mapping and decomposition of debris in fisheries grounds| Representative person | Yoshihiro Fujiwara |
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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 Interval2013/02/10 - 2013/02/16
Research Area
Off Sanriku
CategoryResearch Cruise
OverviewFirst of all, we trained the operation of the mini-ROV "Crambon" that is constructed by the TEAMS Project in 2012. Trough the operation we checked it works well under the sea-water and remove bugs on the systems. Navigation problems were found and adjusted to extend the under sea-water part of USBL. In the field, Off Sanriku, we observed the sea bottom, distribution of benthic animals (Ophiuroids, crabs, jerry fish, cods, etc.) in the depth of 160-230m. Large debris was not found in this cruise.
Overview of the Observation
Research Point Table
| Point | | Name | CRB001 |
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| Coordinates | 39.377907,142.097403 |
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| Name | CRB002 |
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| Coordinates | 39.375578,142.09976 |
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| Name | CRB002-A |
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| Coordinates | 38.297845,141.147485 |
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| Name | CRB002-B |
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| Coordinates | 38.299168,141.14884 |
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| Name | CRB002-C |
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| Coordinates | 38.299345,141.148822 |
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| Name | CRB003 |
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| Coordinates | 39.342405,142.137612 |
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| Name | CRB004 |
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| Coordinates | 39.338698,142.13634 |
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Research Point Map & Track Chart Map & Point List
Results and Future PlanWe operated the Crambom dive at the 160m and 230m depths off Ohtsuchi. Dense bed of ophiuroid, Ophiura sarsii covered on the sea-floor, and also, commersial species of cod, Gadus macrocephalus, buccinid snails, horsehair crab, Erimacrus isenbeckii were observed. We found some particles of woods, but not large debris like as fish net or ship.
Investigation Item and Data Acquisition
| Investigation Item | Data Acquisition |
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| Observational research submarine | movie |
| Seawater survey | CTD, DO data |
Reference
Related Observation Plan
Related Observation Data
Person in charge of Investigation
| Representative person | Shinji Tsuchida |
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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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| Fiscal Year | 2012 |
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| Organization | Japan Agency for Marine-Earth Science and Technology |
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| Category | Research Cruise |
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| Research Area | North Sanriku
South Sanriku
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| Discipline | Ocean physics -> Water temperature
Ocean physics -> Others
Ocean chemistry -> Salinity
Ocean chemistry -> Dissolved oxygen
Ocean environment -> Others
Ocean biology / Ocean ecology -> Others
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