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Title: Intrusion of Anchialine Species in the Marine Environment: The Appearance of an Endemic Hawaiian Shrimp, Halocaridina rubra, on the South Shore of O'ahu (Hawaiian Islands) 
Author: Bailey-Brock, Julie H.; Brock, Vernon R.; Brock, Richard E.
Date: 1999-10
Publisher: University of Hawai'i Press
Citation: Bailey-Brock JH, Brock VR, Brock RE. 1999. Intrusion of anchialine species in the marine environment: the appearance of an endemic Hawaiian shrimp, Halocaridina rubra, on the south shore of O'ahu (Hawaiian Islands). Pac Sci 53(4): 367-369.
Abstract: A single specimen of the endemic anchialine shrimp Halocaridina
rubra Holthuis was collected on the reef under a brick in a freshwater extrusion
in the lower intertidal at Kawaiku'i Beach Park, Niu Valley, O'ahu, Hawai'i,
on 25 December 1998. Repeated collecting efforts at low tides failed to produce
more shrimp. The associated fauna includes an anadromous eleotrid fish, Eleotris
sandwicensis (the 'o'opu 'akupa), isopods Apanthura inornata and Talitroides
sp., alpheid shrimp (Alpheus crassimanus), an oligochaete, and gobioid fish
(Bathygobius fuscus). Fresh water seeping out across the sand and visible in
the area at low tides may have been the source of the specimen. This find may
represent a rare occurrence of H. rubra in the reef flat habitat or the intrusion of
anchialine species may occur with some frequency after heavy rains when the
groundwater flow increases.
ISSN: 0030-8870

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