出版社：Government of Western Australia / Department of Fisheries
摘要：Data on bioeroding sponge species that excavate shells of the pearl oyster, Pinctada
maxima, was collected from the main fishing grounds in North Western Australia.
Estimates on infestation rates across size/age classes of shell are provided from the
main fishing grounds and over three consecutive fishing seasons. Minimal infestation
occurred in smaller shells therefore lowering the minimum size provides one approach
to minimizing the impact of these sponges. Estimates of infestation rates in calcareous
substrates of the fishing ground are also provided and compared on an area basis with
shell infestation rates, including shell density and calcareous substrate density estimates
of the fishing grounds. Techniques were developed to estimate the volume of bioeroding
sponge erosions in pearl oyster shells and results are compared between different sponge
species and fishing grounds. A field guide was developed to demonstrate the most
common visual appearances of bioeroding sponge infestations. Industry and research
personnel can use this field guide for bioeroding sponges in general and as a guideline
to determine grades of infestation during field surveys.
关键词：Bioeroding sponges, calcareous habitat, erosion area, biomass, pearl oyster,
Pinctada maxima, Pione velans, Cliona dissimilis, Western Australia
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