Body-length frequency and spatial segregation of the North Pacific spiny dogfish Squalus suckleyi in Tsugaru Strait, northern Japan

2017 ◽  
Vol 83 (6) ◽  
pp. 917-928 ◽  
Author(s):  
Toshikazu Yano ◽  
Tsutomu Hattori ◽  
Tsuneshiro Tamukai ◽  
Seiji Ohshimo
Keyword(s):  
Body Length ◽  
North Pacific ◽  
Spatial Segregation ◽  
Spiny Dogfish ◽  
Length Frequency ◽  
The North ◽  
Tsugaru Strait ◽  
The North Pacific ◽  
Northern Japan

Spatial distribution analysis of the North Pacific spiny dogfish,Squalus suckleyi, in the North Pacific using generalized additive models

2017 ◽  
Vol 26 (6) ◽  
pp. 668-679 ◽  
Author(s):  
Toshikazu Yano ◽  
Seiji Ohshimo ◽  
Minoru Kanaiwa ◽  
Tsutomu Hattori ◽  
Masa-aki Fukuwaka ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
North Pacific ◽  
Generalized Additive Models ◽  
Additive Models ◽  
Spiny Dogfish ◽  
Distribution Analysis ◽  
The North ◽  
The North Pacific

Mass balance of radiocaesium derived from Fukushima accident and estimation of latest fluxes among atmosphere, land and ocean

2020 ◽  
Author(s):  
Michio Aoyama ◽  
Daisuke Tsumune ◽  
Yayoi Inomata ◽  
Yutaka Tateda
Keyword(s):  
North Pacific ◽  
Surface Soil ◽  
North Pacific Ocean ◽  
Open Water ◽  
137Cs Activity ◽  
The Sea Of Japan ◽  
Fukushima Accident ◽  
The North ◽  
Tsugaru Strait ◽  
The North Pacific

<p>Regarding with amount of movement of 137Cs from domain to domain for several years after the accident, we also evaluated that the amount of 137Cs transported by the rivers might be 40 TBq which is corresponding to less than 1.3 % of deposited 137Cs. For resuspension, the annual deposition of 137Cs at Okuma during the period from 2014 to 2018 means that 4 TBq year-1to 10 TBq year-1should be amount of resuspension from land to atmosphere and this amount correspond to 0.1 % to 0.3 % of total deposition of 137Cs on land in Japan. The 137Cs activity concentration at 56N canal in 2016-2018 correspond to 137Cs discharge of 0.73 TBq year-1to 1.0 TBq year-1from FNPP1 site to open water. The integrated amount of FNPP1 derived 137Cs that entered the Sea of Japan, SOJ, until 2017 was 0.27 ± 0.02 PBq, which is 6.4 % of the estimated total amount of FNPP1-derived 137Cs in the STMW in the North Pacific. The integrated amount of FNPP1-derived 137Cs that returned to the North Pacific Ocean through the Tsugaru Strait from SOJ was 0.11 ± 0.01 PBq, 42 % of the total amount of FNPP1-derived 137Cs transported to the SOJ. As a result of decontamination works, 134 TBq of 137Cs was removed from surface soil until February 2019 which correspond to 4 % of deposited 137Cs on land in Japan. Therefore, the largest transport amount of 137Cs was 270 ± 2 TBq from STMW in the North Pacific to SOJ until 2017, and the second largest was decontamination work by which work about 134 TBq was removed from surface soil on land until Feb. 2019. Fluvial transport by rivers contributed about 40 TBq since June 2011 until 2016.</p>

scholarly journals New data on the distribution and size composition of the North Pacific spiny dogfish Squalus suckleyi (Girard, 1854)

2011 ◽  
Vol 76 (1) ◽  
pp. 111-122 ◽  
Author(s):  
Alexei M. Orlov ◽  
Vadim F. Savinykh ◽  
Eugeny F. Kulish ◽  
Dmitry V. Pelenev
Keyword(s):  
North Pacific ◽  
Size Composition ◽  
Spiny Dogfish ◽  
The North ◽  
The North Pacific

scholarly journals A Lacustrine Biomarker Record From Rebun Island Reveals a Warm Summer Climate in Northern Japan During the Early Middle Holocene Due to a Stronger North Pacific High

2021 ◽  
Vol 9 ◽  
Author(s):  
Masanobu Yamamoto ◽  
Fangxian Wang ◽  
Tomohisa Irino ◽  
Kenta Suzuki ◽  
Kazuyoshi Yamada ◽  
...  
Keyword(s):  
North Pacific ◽  
Asian Summer Monsoon ◽  
Middle Holocene ◽  
Summer Climate ◽  
The North ◽  
Asian Summer ◽  
Rebun Island ◽  
The Kuroshio ◽  
The North Pacific ◽  
Northern Japan

The summer climate of northern Japan since the last glacial period has likely been determined by atmospheric and oceanic dynamics, such as changes in the North Pacific High, the position of the westerlies, the Kuroshio Current, the Tsushima Warm Current (TWC), and the East Asian summer monsoon. However, it is unclear which factor has been most important. In this study, we analyzed leaf wax δ13C and δD and glycerol dialkyl glycerol tetraethers (GDGTs) in sediments from Lake Kushu, Rebun Island, northern Japan, and discuss changes in climate over the past 17,000 years. The GDGT-based temperature, the averaged chain length, δ13C and δD of long-chain n-fatty acids indicated that the climate was cold during the Oldest Dryas period ∼16 ka and warm in the early Middle Holocene from ∼9 to 6 ka. This climate change is consistent with the sea surface temperature in the Kuroshio–Oyashio transition, but inconsistent with changes in the TWC in the Sea of Japan. The results imply that the summer climate of northern Japan was controlled mainly by changes in the development of the North Pacific High via changes in the position of the westerly jet and East Asian summer monsoon rainfall, whereas the influence of the TWC was limited over a millennial timescale.

Intra-seasonal and inter-annual patterns in the demographics of sand lance and response to environmental drivers in the North Pacific

2019 ◽  
Vol 617-618 ◽  
pp. 221-244 ◽  
Author(s):  
MR Baker ◽  
ME Matta ◽  
M Beaulieu ◽  
N Paris ◽  
S Huber ◽  
...  
Keyword(s):  
North Pacific ◽  
Environmental Drivers ◽  
Sand Lance ◽  
The North ◽  
The North Pacific ◽  
Annual Patterns
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