Abstract:The nighttime (N) and daytime (D) size–depth distributions of mesopelagic fish at Ocean Acre, a typical deepwater site in the North Sargasso Sea, are described using archival discrete-depth data from the surface to about 1500 m. The N/D abundance distributions n(z) for a representative group of 18 swtmbladdered species indicate that fish are concentrated in the 0–150 m euphotic zone at night and in the 400–1000 m zone during the day in spring, summer, and winter. Seasonal succession in the average life stage s… Show more
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