Diving researches on deep-sea marine ecosystems after Tohoku tsunami

Representative Organization: Japan Agency for Marine-Earth Science and Technology

2013/06/29 - 2013/07/05

Off Tohoku
0044_R01_map00.pdf

Research Cruise

Of the Northeast Marine Science COE project, was carried out in the research area in Attachment (MAP) research on "changes in the submarine environment" that JAMSTEC to implement. It commissioned a flight For ships, after the operation shakedown training small ROV clammbon mechanism of ownership, we sample collection and observation seafloor, biological, etc. of rubble. In addition, in the survey area within, we mud adopted by multiple corer, we performed analysis of sediment.

0044_R01_list01.pdf, 0044_R01_map01.pdf

Diving researches uisng ROV Crambon were conducted off Minamisanriku, Ohtsuchi and Kamaishi and in Yamada Bay. Ophiuroids (probably Ophiura sarsii) were dominant on the deep-sea bottom at the three deeper sites (off Minamisanriku, Ohtsuchi and Kamaishi) and Pacific cods, channel rockfish, North Pacific giant octopus and snow crabs were often observed. Ophiuroids and some other benthic organisms were collected using a suction sampler installed on Crambon for genetic diversity analyses and accumulation test for hazardous substances. Digital still imaging was conducted for making large mosaic images. Density of marine debris was relatively high in Yamada Bay. Sediment core sampling was conducted off Minamisanriku, Ohtsuchi and Onagawa using multiple corers.

FY2013 Diving researches on deep-sea marine ecosystems after Tohoku tsunami

KK-13-1 videos and photos
KK-13-1_Biological sample data
Biological pictures collected from ROV-Crambon movies