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Short term monitoring of biotic change in Tasmanian marine reserves


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Edgar, GJ and Barrett, NS 1999 , 'Short term monitoring of biotic change in Tasmanian marine reserves' , Journal of Experimental Marine Biology and Ecology, vol. 213 , pp. 261-279 , doi: 10.1016/S0022-981(96)02769-4.

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Fishes, large invertebrates and macroalgae inside four marine reserves and at associated external
reference sites off the eastern Tasmanian coast were censused between 1992 and 1993 shortly after
the declaration of the reserves. Changes in several population parameters during the first year of
protection in the largest Maria Island Marine Reserve were examined using two different ANOVA
designs. The densities of rock lobsters and sea urchins and the mean sizes of wrasse,
leatherjackets, abalone and rock lobsters all increased within the reserve relative to outside over
the first year; however, only the increases in density of sea urchins and mean abalone size were
statistically significant at the 5% level. The census methodology and statistical techniques
nevertheless were considered sufficiently sensitive to reveal any long term change following future
censuses. A doubling in population numbers of most large fishes and invertebrates, or a 10%
increase in the mean size of animals, is required to indicate that significant change has occurred.

Item Type: Article
Authors/Creators:Edgar, GJ and Barrett, NS
Journal or Publication Title: Journal of Experimental Marine Biology and Ecology
ISSN: 0022-0981
DOI / ID Number: 10.1016/S0022-981(96)02769-4
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