Researches on marine ecosystem dynamics in the Tsunami affected area off Sanriku

Fiscal Year

2019

Title

Researches on marine ecosystem dynamics in the Tsunami affected area off Sanriku

Project and Theme

Project 3. Research on factors controlling open ocean benthopelagic ecosystem dynamics
Representative Organization: Japan Agency for Marine-Earth Science and Technology
Research on factors controlling open ocean benthopelagic ecosystem dynamics
Representative personYoshihiro Fujiwara
OrganizationJapan Agency for Marine-Earth Science and Technology
DepartmentAnalyses of Changes in East Japan Marine Ecosystems Research and Development Group

Research Information

Period and Interval
2019/07/14 - 2019/08/07
Research Area
off Sanriku
Category
Research Cruise
Overview
Topographic survey. Marine environmental measurement by XBT casting. Quantitative observation of benthic animals and demersal fish. Biological sampling for estimating parameters of the ecosystem model. Biomass estimation of scavenging animals and fish by baited cameras.

Overview of the Observation

Research Point Table
Polygon
Nameoff Sanriku
Coordinates37,141/40.45,141/40.45,143.5/37,143.5/37,141
Results and Future Plan
Topographic survey. During the cruise, bathymetry data off Iwate was obtained by SEABAT. Marine environmental information was acquired by XBT casting. Biomass estimation for Ecopath Model. Quantitative observation of benthic animals and demersal fish was carried out using by main camera of ROVs and the bottom observation camera system keeping same altitude for five minutes observations. Biological sampling for estimating parameters of the ecosystem model. As the candidates of functional groups of Ecopath Model, benthic animals and demersal fish were collected for stomach contents analysis using by the suction sampler loaded on the ROVs and baited trap. Biomass estimation of scavenging animals and fish. First arrival times of each species were recorded by the baited cameras for estimating density. Each species density will be converted to the biomass using average weight by references or samples.

Reference

Related Observation Plan
FY2019 Researches on marine ecosystem dynamics in the Tsunami affected area off Sanriku
Related Observation Data
KM19-05C Videos of ROV Crambon
KAIMEI KM19-05C Biological Sample
KAIMEI KM19-05C Navigation
KAIMEI KM19-05C Marine Meteorology
KAIMEI KM19-05C Sea-surface Photosynthetically Active Radiation (PAR)
KAIMEI KM19-05C Precipitable water vapor (GNSS water vapor)
KAIMEI KM19-05C Cloud Ceiling
KAIMEI KM19-05C Shipboard Acoustic Doppler Current Profiler (ADCP)
KAIMEI KM19-05C Underway Thermosalinograph
KAIMEI KM19-05C KM-ROV Dive 99 Video
KAIMEI KM19-05C Shipboard Three Component Magnetometer (STCM)
KM-ROV#96-103 KiPro Movie
KMROV#97-103 GoPro Movie
KAIMEI KM19-05C Bathymetry (MBES)
KAIMEI KM19-05C Expendable Bathythermograph (XBT)
KM19-05C KM-ROV KMROV 00096-00103 Submersible Conductivity-Temperature-Depth Profiler (CTD)
Biological pictures collected from ROV-Crambon movies

Person in charge of Investigation

Representative personShinji Tsuchida
OrganizationJapan Agency for Marine-Earth Science and Technology
DepartmentAnalyses of Changes in East Japan Marine Ecosystems Research and Development Group (JAM-TEAMS), Marine Biodiversity and Environmental Assessment Research Center (BioEnv)

Keywords

Fiscal Year2019
OrganizationJapan Agency for Marine-Earth Science and Technology
CategoryResearch Cruise
Research AreaNorth Sanriku
South Sanriku
DisciplineOcean physics -> Water temperature
Ocean biology / Ocean ecology -> Biomass
Ocean biology / Ocean ecology -> Fishes
Ocean biology / Ocean ecology -> Arthropods
Ocean biology / Ocean ecology -> Mollusks
Ocean biology / Ocean ecology -> Plankton
Topography / Geology / Geophysics -> Topography