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Item Description Kido, Michael H. en_US Heacock, Donald E. en_US Asquith, Adam en_US 2008-07-15T07:00:21Z 2008-07-15T07:00:21Z 1999-07 en_US
dc.identifier.citation Kido MH, Heacock DE, Asquith A. 1999. Alien rainbow trout (Oncorhynchus mykiss) (Salmoniformes: Salmonidae) diet in Hawaiian streams. Pac Sci 53(3): 242-251. en_US
dc.identifier.issn 0030-8870 en_US
dc.description.abstract Diet of rainbow trout, Oncorhynchus mykiss (Walbaum), introduced by the State of Hawai'i into tropical headwater streams of the Waimea River in the Koke'e area of the Hawaiian island of Kaua'i, was examined in this study through gut content analysis. In Wai'alae Stream, rainbow trout were found to be opportunistic general predators efficient at feeding on invertebrate drift. Foods eaten ranged from juvenile trout, to terrestrial and aquatic arthropods, to algae and aquatic mosses. Native aquatic species, particularly dragonfly (Anax strennus) and damselfly (Megalagrion heterogamias) naiads, lyrnnaeid snails (Erinna aulacospira), and atyid shrimp (Atyoida bisulcata), were determined to be major foods for alien trout. Terrestrial invertebrates (primarily arthropods), however, provided a substantial (albeit unpredictable) additional food supply. Based on results of the study, it is cautioned that large numbers of rainbow trout indiscriminantly released into lower- to middle-elevation reaches of Hawaiian streams could do substantial damage to populations of native aquatic species through predation, competition, and/or habitat alteration. en_US
dc.language.iso en-US en_US
dc.publisher University of Hawai'i Press en_US
dc.title Alien Rainbow Trout (Oncorhynchus mykiss) (Salmoniformes: Salmonidae) Diet in Hawaiian Streams en_US
dc.type Article en_US
dc.type.dcmi Text en_US

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