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Standing Stocks of Zooplankton Size-Classes and Trophic Levels in Kaneohe Bay, Oahu, Hawaiian Islands

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Title:Standing Stocks of Zooplankton Size-Classes and Trophic Levels in Kaneohe Bay, Oahu, Hawaiian Islands
Authors:Hirota, Jed
Szyper, James P.
Date Issued:Oct 1976
Publisher:University of Hawaii Press
Citation:Hirota J, Szyper JP. 1976. Standing stocks of zooplankton size-classes and trophic levels in Kaneohe Bay, Oahu, Hawaiian Islands. Pac Sci 30(4): 341-361.
Abstract:Data are presented for the estimated standing stocks of nanozooplankton,
microzooplankton, and macrozooplankton in the southern sector of
Kaneohe Bay. Analyses of variability in the estimates due to sampling errors and
spatial-temporal variations and the annual average values are also given. There
is evidence that a shift has occurred in the past decade in the size-composition of
the macro- and microzooplankton; during this time the total amount of zooplankton
particulate nitrogen has remained nearly unchanged. The same dominant
species of macro- and microzooplankton still inhabit the bay. We speculate that the
historical changes in the zooplankton of southern Kaneohe Bay are the result of
selection for nanophytoplankton feeders with rapid rates of metabolic turnover.
The size-composition and trophic structure of the southern Kaneohe Bay zooplankton
and planktivorous nekton in the ecosystem are compared with available
information from the northeastern Pacific Ocean. The major differences between
these ecosystems are to be found in the ratio of macrozooplankton: microzooplankton,
the predominant trophic level of zooplankton captured by O.333-mm-mesh
nylon nets, and the size of the common epipelagic planktivorous nekton.
Appears in Collections: Pacific Science Volume 30, Number 4, 1976

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