Summer-restricted migration of green turtles Chelonia mydas to a temperate habitat of the northwest Pacific Ocean

摘要: The foraging habitats of green turtles Chelonia mydas range from tropical to temperate areas. Previous studies have generally been biased toward and sub-tropical areas; hence, available data do not accurately describe the species' activity in To reveal seasonal patterns habitat use areas, we conducted a by-catch survey, markre- capture study, satellite tracking along Sanriku Coast, zone northwest Pacific Ocean. From July through November 2005 2014, 78 were captured during period relatively high water temperatures (16 24°C). Straight carapace length (SCL) ranged 36.8 85.6 cm (average: 49.4 ± 11.4 cm; n = 78), indicating that most juveniles. In markrecapture 14 72 tagged recaptured 5 426 d after release, 12 which south release point. Based on track- ing data, 3 travelled more than 500 km reach southern habitats, where temperature was warmer (13 25°C) Coast (4 22°C). Our results revealed is seasonally restricted for juvenile turtles, migrate winter, areas migrated longer those This first report migration temper- ate northern