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Factors Affecting the Distribution of Atyid Shrimps in Two Tropical Insular Rivers

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Title: Factors Affecting the Distribution of Atyid Shrimps in Two Tropical Insular Rivers
Authors: Leberer, Trina
Nelson, Stephen G.
Issue Date: Oct 2001
Publisher: University of Hawai'i Press
Citation: Leberer T, Nelson SG. 2001. Factors affecting the distribution of atyid shrimps in two tropical insular rivers. Pac Sci 55(4): 389-398.
Abstract: We investigated factors affecting distribution of atyid shrimps, common
inhabitants of insular freshwater ecosystems. Several abiotic and biotic
variables were measured to determine their influence on atyid shrimp densities
in two streams on the western Pacific island of Guam. Randomly selected sites,
composed of three habitat types (rimes, runs, and pools), were surveyed in the
rainy and dry seasons. We made visual counts of instream fauna in 2-m2 quadrats
within each site. Various statistical analyses suggested that habitat type is a
major factor affecting atyid distribution on Guam. However, results of a transplant
experiment, conducted to test the effect of predators on atyid distribution
directly, were noteworthy: no atyids remained in pools containing the transplanted
jungle perch Kuhlia rupestris in the field. Our data indicate that both
environmental factors and faunal interactions may be important influences on
atyid distribution.
ISSN: 0030-8870
Appears in Collections:Pacific Science Volume 55, Number 4, 2001

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