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Free Content Nearshore Abundance of Tuna (Pisces: Scombridae) Larvae in the Hawallan Islands

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Ichthyoplankton surveys of the nearshore waters of the Hawaiian Islands of Kauai, Oahu, and Maui and more intensive sampling at Kahe Point, Oahu disclosed abundances of tuna (Scombridae) larvae as high as 441/1000 m3, and frequently one or two orders of magnitude higher than those typical of the Central Pacific Ocean. Inter-station spatial variability was higher than 1-h temporal variability at a single station. Both the abundance of larvae and the variability increased toward shore. Leeward catches were significantly greater than windward.

It appears most likely that large numbers of tuna larvae are upwelled along leeward coasts by wind-driven nearshore currents from horizontal strata containing even higher densities of larvae.

Document Type: Research Article

Publication date: January 1, 1979

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