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Title: Survey and Estimates of Commercially Viable Populations of the Sea Cucumber Actinopyga mauritiana (Echinodermata: Holothuroidea), on Tinian Island, Commonwealth of the Northern Mariana Islands 
Author: Trianni, Michael S.; Bryan, Patrick G.
Date: 2004-01
Publisher: University of Hawai'i Press
Citation: Trianni MS, Bryan PG. 2004. Survey and estimates of commercially viable populations of the sea cucumber Actinopyga mauritiana (Echinodermata: Holothuroidea), on Tinian Island, Commonwealth of the Northern Mariana Islands. Pac Sci 58(1): 91-98.
Abstract: A survey was conducted in 1997 to assess commercially viable populations
of the surf redfish, Actinopyga mauritiana, and establish a harvest quota
for those populations on the island of Tinian. A simple random sampling approach
was employed using circular plots as samples. Outer reef flat and reef
slope habitats were sampled, producing a total of 333 samples over a 2-month
period, with a preharvest population estimate of 71,034. A harvest quota of
17,893 surf redfish was established due to stock depletions on both Rota and
Saipan, uncertainty of the density required to ensure successful reproduction of
the species, and high degree of uncertainty in the population estimates. It was
determined that a stratified sampling approach utilizing either simple proportional
or optimal allocation would have resulted in more precise estimates, and
these approaches are favored for any future survey work. Population estimates
should be revised when more accurate estimates of A. mauritiana habitats become
ISSN: 0030-8870

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