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Evaluation from otolith Sr stable isotope ratios of possible juvenile growth areas of Japanese eels collected from the West Mariana Ridge spawning area

The widely distributed East Asian Japanese eel Anguilla japonica constitutes a single genetically homogeneous population with a single spawning area near the West Mariana Ridge. Otolith 87Sr/86Sr ratios of adults (categorized as “river“, “estuarine” or “sea” eels, according to their habitat use history determined from otolith Sr:Ca ratio analysis) collected from the spawning area...

Using tsunami deposits to determine the maximum depth of benthic burrowing

, University of Tokyo , Kashiwa, Chiba , Japan 1 Funding: This study was partly supported by JSPS KAKENHI Grant Number JP16781047 awarded to Kotaro Shirai ( 2 Editor: Kay C. Vopel, Auckland University of ... manuscript. Author Contributions Conceptualization: Koji Seike. Data curation: Koji Seike, Kotaro Shirai, Naoko Murakami-Sugihara. Formal analysis: Kotaro Shirai, Naoko Murakami-Sugihara. Funding

Disturbance of Shallow Marine Soft-Bottom Environments and Megabenthos Assemblages by a Huge Tsunami Induced by the 2011 M9.0 Tohoku-Oki Earthquake

Huge tsunami waves associated with megathrust earthquakes have a severe impact on shallow marine ecosystems. We investigated the impact of a tsunami generated by the 2011 M9.0 Tohoku-Oki earthquake on the seafloor and large benthic animals in muddy and sandy ria coasts (Otsuchi and Funakoshi bays) in northeastern Japan. We conducted underwater field surveys using scuba equipment...

Past daily light cycle recorded in the strontium/calcium ratios of giant clam shells

. AffiliationsAtmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, Chiba 277-8564, Japan.Yuji Sano, Sayumi Kobayashi, Kotaro Shirai & Naoto TakahataDepartment of Earth Sciences, University of Minnesota ... Kobayashi in:Nature Research journals • PubMed • Google ScholarSearch for Kotaro Shirai in:Nature Research journals • PubMed • Google ScholarSearch for Naoto Takahata in:Nature Research journals • PubMed