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dc.contributor.author Douros, William J.
dc.date.accessioned 2011-01-13T19:23:21Z
dc.date.available 2011-01-13T19:23:21Z
dc.date.issued 1993
dc.identifier.citation Douros, William J. "Prehistoric Predation on Black Abalone by Chumash Indians and Sea Otters." In: 3rd California Islands Symposium. 1987. 557-566. en_US
dc.identifier.uri http://hdl.handle.net/10139/3024
dc.description.abstract Present populations of black abalone (Haliotis cracherodii Leach) at Santa Cruz Island, California are presently dense, up to 90/m^2. Examination of shell middens created by Chumash Indians suggests that such high present-day densities may have developed recently after the elimination of the black abalone's two cardinal predators: Chumash Indians and sea otters (Enhydra lutris). The size distribution of abalone in existing populations is skewed towards large individuals (>100 mm) whereas shells from midden populations are smaller (<80 mm). A difference in predation intensity may account for the disparity in population characteristics between historic populations and contemporary populations of black abalone. Intense intraspecific competition among black abalone, as well as certain behaviors, may be recent developments following reduction in predation intensity. If so, black abalone may be experiencing relatively new selection regimes. en_US
dc.language.iso en_US en_US
dc.publisher National Park Service en_US
dc.subject predator prey dynamics en_US
dc.subject California Islands en_US
dc.subject Channel Islands en_US
dc.subject black abalone en_US
dc.subject sea otter en_US
dc.subject Chumash en_US
dc.subject Santa Cruz Island en_US
dc.title Prehistoric Predation on Black Abalone by Chumash Indians and Sea Otters en_US
dc.type Article en_US

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