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dc.contributor.author Douros, William J. en
dc.date.accessioned 2011-01-13T19:23:21Z en
dc.date.available 2011-01-13T19:23:21Z en
dc.date.issued 1993 en
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
dc.identifier.uri http://hdl.handle.net/10139/3024 en
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
dc.language.iso en_US en
dc.publisher National Park Service en
dc.subject predator prey dynamics en
dc.subject California Islands en
dc.subject Channel Islands en
dc.subject black abalone en
dc.subject sea otter en
dc.subject Chumash en
dc.subject Santa Cruz Island en
dc.title Prehistoric Predation on Black Abalone by Chumash Indians and Sea Otters en
dc.type Article en

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