publication . Article . 1999

Swimming depth of migrating silver eels Anguilla japonica released at seamounts of the West Mariana Ridge, their estimated spawning sites

J Aoyama; K Hissmann; T Yoshinaga; S Sasai; T Uto; H Ueda;
Open Access
  • Published: 01 Jan 1999
  • Publisher: Inter Research
  • Country: Germany
Abstract
Five hormone-treated female Japanese silver eels Anguilla japonica were tagged with ultrasonic transmitters and released by submersible in the West Pacific at seamounts of the West Mariana Ridge, their supposed spawning grounds. Four eels were tracked for 60 to 423 min in the vicinity of the seamounts. They did not settle at the seamounts but swam at a mean speed of 0.37 m s 1 into open water above deep ground. Their mean swimming depth ranged from 81 to 172 m. Experiments suggest that pre-matured A. japonica migrate to their spawning grounds in temperate warm water and at shallow depths.
Subjects
free text keywords: Fishery, Oceanography, Seamount, geography.geographical_feature_category, geography, Spawn (biology), Ridge, Mid-ocean ridge, Japonica, biology.organism_classification, biology, Ecology, Open water, Anguillidae, Pacific ocean
Communities
EuroMarine
European Marine Science
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publication . Article . 1999

Swimming depth of migrating silver eels Anguilla japonica released at seamounts of the West Mariana Ridge, their estimated spawning sites

J Aoyama; K Hissmann; T Yoshinaga; S Sasai; T Uto; H Ueda;