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… - Marine Ecology …, 1999 - int-res.com
J Aoyama, K Hissmann, T Yoshinaga, S Sasai, T Uto, H Ueda
Marine Ecology Progress Series, 1999•int-res.comFive 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 ms-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 …
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 ms-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 …
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 ms-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.
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