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Статті в журналах з теми "Fitzroy River (Queensland)"
Douglas, G. B., P. W. Ford, M. Palmer, R. M. Noble, and R. Packett. "Fitzroy River, Queensland, Australia. II. Identification of Sources of Estuary Bottom Sediments." Environmental Chemistry 3, no. 5 (2006): 377. http://dx.doi.org/10.1071/en06010.
Повний текст джерелаDouglas, G. B., P. W. Ford, M. Palmer, R. M. Noble, and R. Packett. "Fitzroy River Basin, Queensland, Australia. I. Identification of Sediment Sources in Impoundments and Flood Events." Environmental Chemistry 3, no. 5 (2006): 364. http://dx.doi.org/10.1071/en06009.
Повний текст джерелаDouglas, G. B., P. W. Ford, M. R. Palmer, R. M. Noble, R. J. Packett, and E. S. Krull. "Fitzroy River Basin, Queensland, Australia. IV. Identification of flood sediment sources in the Fitzroy River." Environmental Chemistry 5, no. 3 (2008): 243. http://dx.doi.org/10.1071/en07091.
Повний текст джерелаMoore, B. R., D. J. Welch, and C. A. Simpfendorfer. "Spatial patterns in the demography of a large estuarine teleost: king threadfin, Polydactylus macrochir." Marine and Freshwater Research 62, no. 8 (2011): 937. http://dx.doi.org/10.1071/mf11034.
Повний текст джерелаHarris, Paul, and Clare Harris. "Leucaena production in the Fitzroy River catchment, central Queensland, Australia." Tropical Grasslands-Forrajes Tropicales 7, no. 4 (September 3, 2019): 339–41. http://dx.doi.org/10.17138/tgft(7)339-341.
Повний текст джерелаSmith, J., G. B. Douglas, L. C. Radke, M. Palmer, and B. P. Brooke. "Fitzroy River Basin, Queensland, Australia. III. Identification of sediment sources in the coastal zone." Environmental Chemistry 5, no. 3 (2008): 231. http://dx.doi.org/10.1071/en07094.
Повний текст джерелаFranz, Jürgen, and Jurek Piorewicz. "Evaluation of sediment transport in the lower part of the Fitzroy River, Queensland." Australasian Journal of Water Resources 6, no. 2 (January 2003): 131–50. http://dx.doi.org/10.1080/13241583.2003.11465217.
Повний текст джерелаBrodie, Jon E., and Alan W. Mitchell. "Nutrients in Australian tropical rivers: changes with agricultural development and implications for receiving environments." Marine and Freshwater Research 56, no. 3 (2005): 279. http://dx.doi.org/10.1071/mf04081.
Повний текст джерелаArmstrong, Graeme, and David T. Booth. "Dietary ecology of the Australian freshwater turtle (Elseya sp.: Chelonia:Chelidae) in the Burnett River, Queensland." Wildlife Research 32, no. 4 (2005): 349. http://dx.doi.org/10.1071/wr04088.
Повний текст джерелаBostock, Helen C., Brendan P. Brooke, David A. Ryan, Gary Hancock, Tim Pietsch, Robert Packett, and Kate Harle. "Holocene and modern sediment storage in the subtropical macrotidal Fitzroy River estuary, Southeast Queensland, Australia." Sedimentary Geology 201, no. 3-4 (October 2007): 321–40. http://dx.doi.org/10.1016/j.sedgeo.2007.07.001.
Повний текст джерелаДисертації з теми "Fitzroy River (Queensland)"
Schacht, Christie, and n/a. "The Quantification of Estuarine Suspended Sediment Dynamics: A Drogue's Perspective." Griffith University. School of Engineering, 2006. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20070201.144830.
Повний текст джерелаLymburner, Leo. "Mapping riparian vegetation functions using remote sensing and terrain analysis." Connect to thesis, 2005. http://repository.unimelb.edu.au/10187/2821.
Повний текст джерела(9725532), Acquire Admin. "Phytoplankton ecology in the Fitzroy River at Rockhampton, Central Queensland, Australia." Thesis, 1999. https://figshare.com/articles/thesis/Phytoplankton_ecology_in_the_Fitzroy_River_at_Rockhampton_Central_Queensland_Australia/21397656.
Повний текст джерелаThe seasonal periodicity of hydrology, physical and chemical water quality parameters and phytoplanktonic assemblages was studied at two sites in a large tropical Australian riverine impoundment. This study, the first in the lower Fitzroy River at Rockhampton, occurred between August 1990 and November 1993. It covered extremes in riverine flow conditions including major flooding and drought.
The annual flow regime was characterized by major flows in the "wet" season (summer and autumn) and greatly reduced or no flow in the "dry" season of winter, spring and sometimes early summer. Consequently, the thermal regime at both of the study sites was divided into two phases. The first was a phase of water column heating in the late winter to early summer. Features of this heating phase were long term stratification with progressive epilimnetic deepening, high pH, regular occurrence of epilimnetic oxygen supersaturation and decreased or undetectable levels of oxidized nitrogen in the surface layer. Hypolimnetic anoxia was recorded late in this phase. The second, between substantial wet season inflows and late winter was characterized by nutrient rich inflows and water column cooling and mixing.
Distinct interannual differences occurred in the volume, source and timing of inflows and subsequent water chemistry. In 1991, conductivity, water clarity, filterable reactive phosphorus (FRP) and pH increased markedly following major flooding from northern tributaries, while oxidized nitrogen decreased. This was in marked contrast to the drier years of 1992 and 1993 where turbidity and oxidized nitrogen were higher during the initial post-flood period and conductivity and FRP were lower. Extremes of mostly abiogenic turbidity (range 1.6 to 159 NTU) were a feature of the light climate. Ratios of euphotic depth/mixing depth below 0.3 occurred in early 1992 and 1993.
Steep gradients in the physical and chemical environment were paralleled by variations in the phytoplankton. Algal biomass (as chlorophyll a) at Site 1, midstream opposite the water intake for the city of Rockhampton, ranged from 1.5 to 56.6 ug L-1. The vertical water column distribution of chlorophyll was variable with assemblages normally dominated by phytoflagellates and various species of cyanoprokaryotes. There was also higher relative abundance of chlorophyll a (reflecting increasing dominance of cyanoprokaryotes) in the latter half of the year and at the lower end of light availability. The specific vertical water column positioning with respect to light and temperature is shown for assemblages dominated by the genera Anabaena, Aphanizomenon and Cylindrospermopsis.
The most striking aspect of the phytoplankton was the long term dominance of cyanoprokaryotes and the species richness (particularly that of cyanoprokaryotes) when compared with the dearth of information to date on other tropical rivers. Seasonal successions were varied. Regularly occurring assemblages were cyanoprokaryotes (Oscillatoriales), euglenophytes or non-flagellated chlorophytes during flows followed by flagellated chlorophytes and then cyanoprokaryotes (Nostocales) during the dry season. Genera present indicated highly eutrophic conditions. Hierarchical agglomerative clustering of phytoplankton data and comparison with a principal components analysis of corresponding environmental data were used to demonstrate the linkage between steep environmental gradients and variation in the phytoplankton assemblage. The specific environmental conditions associated with the success of various species were also analysed and presented. Using the above information, a two-part model was proposed which predicts the most likely genera of phytoplankton with respect to multidimensional environmental gradients. This model covers a wide gamut of conditions varying from highly variable lotic to lentic environments.
As Cylindrospermopsis raciborskii was considered a most important species in relation to the quality of the water supply for Rockhampton, the physical, chemical and biotic conditions prior to and during a bloom of this species are described. A number of possible grazers of C. raciborskii were identified with a view to future biomanipulation. One of these, the large ciliate, Paramecium cf. caudatum was found to be an effective grazer of toxic straight C. raciborskii in the laboratory.
This study is unique in that it analyses the impact of episodic events (eg. major flooding) on the subsequent phytoplankton in the lower Fitzroy River. The model relating phytoplankton to multidimensional environmental gradients provides great information for use in management, particularly in relation to the prediction of toxic algal blooms.
(2930712), Ivor G. Stuart. "Assessment of a vertical-slot fishway for non-salmonid fish at a tidal barrier on the sub-tropical Fitzroy River, Queensland." Thesis, 1999. https://figshare.com/articles/thesis/Assessment_of_a_vertical-slot_fishway_for_non-salmonid_fish_at_a_tidal_barrier_on_the_sub-tropical_Fitzroy_River_Queensland/20459520.
Повний текст джерелаFishways designed for salmonids in temperate rivers have often been successful, but similar fishways provided for non-salmonid species in tropical and sub- tropical rivers have frequently failed. In 1970 a salmonid style fishway was built on a tidal barrage on the sub -tropical Fitzroy River, in Queensland, north-eastern Australia. Despite modifications to the design in 1987 assessment of the fishway in 1978 and 1992 demonstrated that it was ineffective; particularly as few barramundi (Lates calcarifer [Centropomidae]) were found at the top of the fishway. The inadequacy of the design appeared to be related to very high water velocities and turbulence within the fishway pools. Consequently, since construction of the tidal barrage many catadromous fish populations (species that live in freshwater but breed in saltwater) have declined in the freshwater reaches of the Fitzroy River.
In 1994 the fishway was modified to a vertical -slot design. The study reported in this thesis is an assessment of the effectiveness of the new design from 1995 to 1997. In 38 paired samples taken at the top and bottom of the fishway, over 16 months, 29 fish species and over 23,000 fish were collected at a maximum rate of 3,400 per day. At the top of the fishway 15,471 individuals were collected and 7594 at the bottom. The migratory population consisted of 4 marine species, 9 diadtomous species and 16 potamodromous species. Common species using the fishway included blue -catfish (Arius graeffei [Ariidae]), bony herring (Nematalosa erebi [Clupeidae]), striped mullet (Mugil cephalus [Mugilidae]), barramundi, and long -finned eels (Anguilla reinhardtii [Anguillidae]). Shrimp Macrobrachium australiense [Palaemonidae]), juvenile crabs (Varuna litterata [Grapsidae]) and long -finned elvers did not ascend the full length of the fishway and specific fishways for these species are recommended. Fish between 25 and 640 mm in length ascended the fishway, although the passage of smaller size classes of immature fish was restricted which may be important for the sustainability of these migratory populations. The bulk of the biomass (71% at the top and 66% at the bottom) was made up of the diadromous blue -catfish of which 81 % were immature. Furthermore, a number of other common fish species were represented mostly by juveniles, including striped mullet, bony herring and barramundi.
This study is the first record of barramundi successfully migrating through an in situ fishway in that no significant difference was found between the size of fish at the top and bottom. A major finding was that 95% of the barramundi from the fishway were immature fish (200-640 mm long), but significantly larger barramundi (maximum length 980 mm) were captured by angling near the base of the fishway. Nevertheless, enlargement of vertical -slot width from 0.15 m to 0.45 m only encouraged a small number of larger fish (890 mm maximum length) to enter. Interestingly, very small barramundi (45-163 mm long) were also absent from the fishway, but these were found in a small tidal tributary below the barrage. Very young barramundi appear to inhabit specific off - channel habitat before migrating in the main river at a larger size. The implications of these results are that 150 mm slot widths are suitable for barramundi and that different life stages have different migratory requirements.
Частини книг з теми "Fitzroy River (Queensland)"
"The Angler in the Environment: Social, Economic, Biological, and Ethical Dimensions." In The Angler in the Environment: Social, Economic, Biological, and Ethical Dimensions, edited by William Sawynok and John R. Platten. American Fisheries Society, 2011. http://dx.doi.org/10.47886/9781934874240.ch12.
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