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Earth Science | Biosphere | Ecological Dynamics | Ecosystem Functions | Consumption Rates
66 record(s)
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draft
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Shark collection and live feeding experiments were carried out at Weipa, far north Queensland.
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Laterals of kelp Ecklonia radiata were cut from healthy individuals, photographed, placed on reefs for 2-3 days, then collected and re-photographed. Area loss was calculated from photographs.
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This dataset contains results from a series of laboratory and field experiments on local grazer communities to determine the parameter values required by the COASEC (Coastal Ocean Ecology) model. These experiments are part of the second stage of the Perth Coastal Waters Study. These parameters were delta, the grazing demand (biomass of food eatern per biomass of grazer per day; beta, the assimilation constant (the difference between the food consumed and defecated as a percentage of the food consumed); micron, the mortality constant (the turnover rate of the community), and kg, the ratio of food available to food demand to satisfy 50% of maximum potential growth of grazer communities. Empirically derived parameter values for the main grazers, crustaceans and gastropods were very different from each other and from the default values in the model. Experiments indicated that both types of grazers primarily fed on periphyton and grazing rates varied between summer and winter. Grazing impacts on larger epiphytes are dependent upon the type of grazer and the species of epiphyte.
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This dataset stores information on the diet of pelagic fishes (tuna and swordfish). The samples and data have been collected seasonally from various sources (fishers on commercial, recreational and chartered vessels as well as CSIRO staff and observers) since 1992. Keywords: Stomach contents, diet, tuna, swordfish.
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Field experiments were carried out investigating prawn predation using tethering techniques at three sites in the Embley River in October 1994, December 1994 and April 1995.
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Surveys of inshore fish catches, fish diets, and habitat and abiotic factors were carried out off the coast of North-west Groote Eylandt, Gulf of Carpentaria, in 1989 and 1990.
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Two mangrove sites and two seagrass sites were sampled in each region of the Gulf of Carpentaria; Weipa (between 1991 and 1994) and Groote Eylandt (between 1994 and 1995). The stable isotope ratios of seagrass, mangroves and prawns were measured, and the contribution of mangroves and seagrass to prawn food webs was estimated.
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Two studies were carried out (October 1993 and March 1994) each lasting 24 hours, at one site in the Embley River, Gulf of Carpentaria. Juvenile prawn samples were collected every 2 hours by hand scoop or beam trawl in the river. Data were collected on gut fullness, moult stage, and prey type and number.
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Surveys of inshore fish catches, fish diets, and habitat and abiotic factors were carried out in the Norman River estuary, Gulf of Carpentaria, between 1991 and 1992.
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Surveys of inshore fish catches, fish diets, and habitat and abiotic factors were carried out off the coast of Albatross Bay, south of the Embley River mouth, in 1991 and 1992.