期刊名称：Western Australia. Fisheries Department. Fisheries Research Reports
印刷版ISSN：1035-4549
出版年度：2006
卷号：160
出版社：Government of Western Australia / Department of Fisheries
摘要：High variability in abundance in natural populations is common particularly in species that are
relatively short lived. Sampling at different times during the year can provide a representative
picture of the mean abundance for a region (Stewart-Oaten et al. 1986, Underwood 1993). In
order to understand changes in biodiversity of trawl bycatch in trawled and untrawled areas,
some understanding of seasonal and annual variability in distribution and abundance of
species is required. Also, in order to determine long term monitoring strategies, the timing
of monitoring needs to be optimal. Some understanding of the seasonal cycles of species is
required so that these can be considered when interpreting results. Diurnal, seasonal and annual
variation was studied in Shark Bay whilst in Exmouth Gulf and Onslow, seasonal variability
only was studied during this project.
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