The population structure of the ocellate spot skate (Okamejei kenojei), distributed in the
western North Pacific, was assessed on the basis of genetic variations in the mitochondrial …

In many migratory species, smaller migrants suffer higher mortality rates during the risky
migration. To minimize the size-selective mortality, migrants with smaller body sizes would …

Some animals compulsory or conditionally migrate between different habitats in particular
life stages to improve their fitness (Gross et al. 1988, Dingle and Drake 2007, Newton 2010) …

Abstract In the Orumappu River, northeastern Hokkaido, 667 wild masu salmon smolts were
tagged and released. During annual monitoring within the river, 10 individuals were …

抄録 The migratory histories of individual masu salmon Oncorhynchus masou collected from
the Naka River, Tochigi, Japan were clarified from otolith strontium (Sr) and calcium (Ca) …