-
Interactions between sea urchins and macroalgae in SW Australia - Summary.
Data was collected to: - characterise the distributions and abundances of herbivorous invertebrates (mainly sea urchins) and examine their trophic positions and diets, and -... -
Surveys of long spined sea urchin (Centrostephanus rodgersii) and barrens...
Quantitative surveys were undertaken at four sites in the Kent Group, north eastern Tasmania (southern and northern shores of East Cove at Deal Island, Winter Cove at Deal... -
Dive surveys of long spined sea urchin (Centrostephanus rodgersii) and...
The spatial extent of the long spined sea urchin, Centrostephanus rodgersii, was estimated by divers using underwater visual census methods to survey rocky reef habitats at 13... -
Growth models, age frequency and size frequency distributions of sea urchin...
Growth models were constructed for two sea urchin populations over a two-year period using a tag-recapture study in the Mercury Passage, Tasmania. Sea urchins were tagged using... -
Inter-species differences in trophic position and diet of three sympatric...
Measurements of natural abundances of stable isotopes and direct observation of gut contents were used to determine the trophic positions of three sympatric sea urchin species.... -
Relative effects of sea urchins and fish on adult and recruiting macroalgae...
An experiment was conducted over 13 months to test whether sea urchins and herbivorous fishes exert additive effects on the macroalgal assemblage. Specific predictions were that... -
Effect of Centrostephanus rodgersii barrens on standing stocks of abalone...
The effect of barrens formed by the long spined sea urchin, Centrostephanus rodgersii, on the standing stocks of southern rock lobsters (Jasus edwardsii) and black lip abalone... -
Sea urchin predation mortality rates
Mortality rates of the sea urchin Heliocidaris erythrogramma where estimated under experimental conditions to determine the importance of natural and predation mortality in... -
Surveys of sea urchins (Centrostephanus rodgersii and Heliocidaris...
Quantitative surveys were undertaken at five sites in the Kent Group, north eastern Tasmania (Murray Pass, Winter Cove, Little Squally Cove,and southern end of Erith Island) by... -
Effect of Heliocidaris erythrogramma on benthic macroalgae and drift retention
Two experiments were performed. The first was designed to test for effects of Heliocidaris at different densities, using fenced plots in which the densities of Heliocidaris were... -
Natural growth lines in sea urchin (Heliocidaris erythrogramma) ossicles
Sea urchin tagged using tetracycline display visible marks in jaw elements and test plates that can be used to determine growth and subsequently an individuals age. Natural... -
Abundance estimates of sea urchins and a suite of predators over multiple...
Underwater visual census surveys were conducted at 15 sites in eastern Tasmania to quantify the abundance of the sea urchin Heliocidaris erythrogramma and several putative... -
Distribution and abundance of large invertebrate herbivores in south-western...
A three-pronged approach was taken to quantify patterns of abundance and coexistance at small (centimetres) to very large (hundreds of kilometres) spatial scales. This was...
1 - 13 of 13 results