Author:
Okazaki Yuji,Nakata Hideaki,Kimura Shingo
Abstract
The frontal area of the Kuroshio Extension was observed in June 1997 and May
1999. In 1997, anchovy larvae were most abundant in a frontal region of the
eddy generated in association with a northward intrusion of warm water from
the Kuroshio Extension. High nutrient concentrations apparently overlapped
with the larval aggregation, while chlorophyll-a
concentration was rather low all over the region. In 1999, observations were
made along a two-day trajectory of a drifter released from the eddy centre,
which was recognized by a satellite image. Chlorophyll-a
concentration was high in the eddy centre but decreased with time. By
contrast, abundance of copepod nauplii in the eddy increased with time, and
eventually doubled. These results suggest that the frontal eddy contributes to
both copepod production and horizontal entrainment or aggregation of anchovy
larvae in the frontal region. The frontal eddy possibly benefits the growth
and survival of fish larvae in the oligotrophic oceanic water of the Kuroshio
Extension region.
Subject
Ecology,Aquatic Science,Ecology, Evolution, Behavior and Systematics,Oceanography
Cited by
39 articles.
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