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Articles 1 - 28 of 28
Full-Text Articles in Life Sciences
Coastal Aquaculture And Conservation Can Work Together, Tim Dempster, Pablo Sanchez-Jerez, Fernando Tuya, Damian Fernandez-Jover, Just Bayle-Sempere, Arturo Boyra, Ricardo Haroun
Coastal Aquaculture And Conservation Can Work Together, Tim Dempster, Pablo Sanchez-Jerez, Fernando Tuya, Damian Fernandez-Jover, Just Bayle-Sempere, Arturo Boyra, Ricardo Haroun
School of Natural Sciences Publications
Current fishing practices are regarded as unsustainable (Pauly et al. 2002), yet our appetite for seafood grows. To meet the growing gap, there are increasing calls for mankind to tame the oceans through aquaculture (Marra 2005). Close to the coast, rapid expansion of marine aquaculture is underway throughout the world. Sea cages enclose 2.5 million tons of fish, while 12 million tons of mussels, oysters and clams hang from floating ropes or grow on racks or trays (FAO 2004). Aquaculture structures are now ubiquitous to many coastlines. As the expansion continues, how can we best manage the interaction between natural …
Spatial Patterns And Response To Wave Exposure Of Shallow Water Algal Assemblages Across The Canarian Archipelago: A Multiscaled Approach, Fernando Tuya, Ricardo J. Haroun
Spatial Patterns And Response To Wave Exposure Of Shallow Water Algal Assemblages Across The Canarian Archipelago: A Multiscaled Approach, Fernando Tuya, Ricardo J. Haroun
School of Natural Sciences Publications
We conducted a mensurative survey to investigate spatial variability and the effect of wave exposure at a range of spatial scales including islands (100s of kilometres apart), locations within islands (10s of kilometres apart), and sites within locations (100s of meters apart), on the composition, abundance and distribution of shallow water algal assemblages across subtidal hard bottoms of the Canarian Archipelago (eastern Atlantic). A multi-scaled hierarchical sampling design provided the framework for quantifying the variation among samples due to each spatial scale and level of wave exposure. Haphazardly placed 50 x 50 cm quadrats were deployed in shallow rocky-reefs to …
The Hillarys Transect (1): Seasonal And Coss-Shelf Variability Of Physical And Chemical Water Properties Off Perth, Western Australia, 1996-98, Alan F. Pearce, M J. Lynch, Christine E. Hanson
The Hillarys Transect (1): Seasonal And Coss-Shelf Variability Of Physical And Chemical Water Properties Off Perth, Western Australia, 1996-98, Alan F. Pearce, M J. Lynch, Christine E. Hanson
School of Natural Sciences Publications
A 27-month study of the water properties across the continental shelf off Perth, Western Australia (the "Hillarys Transect") has provided the first systematic inter-disciplinary climatology of the physical, chemical, optical and biological cycles across the shelf. This paper describes the main features of the seasonal and cross-shelf variability of the physical oceanography and chemistry, while companion papers discuss some of the links between the biology and physics of the region
A Review Of Landholder Motivations And Determinants For Participation In Conservation Covenanting Programmes, Thomas Kabii, Pierre Horwitz
A Review Of Landholder Motivations And Determinants For Participation In Conservation Covenanting Programmes, Thomas Kabii, Pierre Horwitz
Research outputs pre 2011
Conservation covenants (or easements) are flexible but legally enforceable documents attached to a land title restricting the use of that land, providing for the protection of important conservation values, while allowing the landholder to retain possession. Given the attractiveness of covenants to those who seek to expand national and regional nature conservation initiatives, it is important to understand landholder motivations for participation in programmes that covenant for nature conservation. This paper examines the likely influences on landholder decision making when it comes to conservation initiatives. A review of literature highlights key motivations and determinants, such as landholder demographics and the …
Changes In Demersal Wild Fish Aggregations Beneath A Sea-Cage Fish Farm After The Cessation Of Farming, Fernando Tuya, Pablo Sanchez-Jerez, Tim Dempster, Arturo Boyra, Ricardo Haroun
Changes In Demersal Wild Fish Aggregations Beneath A Sea-Cage Fish Farm After The Cessation Of Farming, Fernando Tuya, Pablo Sanchez-Jerez, Tim Dempster, Arturo Boyra, Ricardo Haroun
School of Natural Sciences Publications
Demersal, non-cryptic, wild fish were counted in replicate 100 m2 transects beneath a floating sea-cage fish farm and two nearby sandy locations at Gran Canaria (Canary Islands, eastern Atlantic) four times before and after the cessation of farming. Cessation of farming involved the removal of farmed fish and ceasing of the daily feeding, although farm structures (cages and moorings) remained. A “beyond-BACI” sampling design provided the framework to detect the effect of the cessation of farming, which produced qualitative and quantitative changes in the composition and structure of the fish assemblages beneath the sea-cage fish farm compared with two nearby …
An Automated Sampling Soil Reduction-Oxygenation Rf Sensor Network For Cereal Crop Management, Michael Collins, Christopher C. Holme, Keng T. Tan, Leisa Armstrong
An Automated Sampling Soil Reduction-Oxygenation Rf Sensor Network For Cereal Crop Management, Michael Collins, Christopher C. Holme, Keng T. Tan, Leisa Armstrong
Research outputs pre 2011
There is a need for cost effective tools and data collection methods for field measurements: to increase both productivity and volumes of collected data in the quest for enhanced understanding and management of environmental systems. To such end, we explore the various RF technologies that may be combined into a cost effective soil redox sensor network, discuss the merits of each as a component of said network, describe a prototype soil redox sensor network and present the method and results of laboratory and field tests performed. The experiment was conducted by running the prototype RF based equipment alongside a closely …
Responses Of Elbow Flexors To Two Strenuous Eccentric Exercise Bouts Separated By Three Days, Trevor C. Chen, Kazunori Nosaka
Responses Of Elbow Flexors To Two Strenuous Eccentric Exercise Bouts Separated By Three Days, Trevor C. Chen, Kazunori Nosaka
Research outputs pre 2011
No abstract provided.
Shuffling Buddies: How An Online Community Supports Heart Patients With Healthier Lifestyle Choices - An Early Indication Of Physical Activity And Exercise Outcomes From The Heartnet Intervention, Leesa Costello, Arshad Omari, Maurice Gerard Swanson
Shuffling Buddies: How An Online Community Supports Heart Patients With Healthier Lifestyle Choices - An Early Indication Of Physical Activity And Exercise Outcomes From The Heartnet Intervention, Leesa Costello, Arshad Omari, Maurice Gerard Swanson
Research outputs pre 2011
No abstract provided.
Effects Of Amino Acid Supplementation On Muscle Soreness And Damage, Kazunori Nosaka, Paul Sacco, K. Mawatari
Effects Of Amino Acid Supplementation On Muscle Soreness And Damage, Kazunori Nosaka, Paul Sacco, K. Mawatari
Research outputs pre 2011
No abstract provided.
The Hillarys Transect (1): Seasonal And Cross-Shelf Variability Of Physical And Chemical Water Properties Off Perth, Western Australia, 1996-98, Alan Pearce, Mervyn Lynch, Christine Hanson
The Hillarys Transect (1): Seasonal And Cross-Shelf Variability Of Physical And Chemical Water Properties Off Perth, Western Australia, 1996-98, Alan Pearce, Mervyn Lynch, Christine Hanson
Research outputs pre 2011
A 27-month study of the water properties across the continental shelf off Perth, Western Australia (the "Hillarys Transect") has provided the first systematic inter-disciplinary climatology of the physical, chemical, optical and biological cycles across the shelf. This paper describes the main features of the seasonal and cross-shelf variability of the physical oceanography and chemistry, while companion papers discuss some of the links between the biology and physics of the region
Non-Contact Laser Spectroscopy For Plant Discrimination In Terrestrial Crop Spraying, Kaveh Sahba, Sreten Askraba, Kamal Alameh
Non-Contact Laser Spectroscopy For Plant Discrimination In Terrestrial Crop Spraying, Kaveh Sahba, Sreten Askraba, Kamal Alameh
Research outputs pre 2011
The early development of a novel micro-photonic based sensing architecture for use in selective herbicide spraying systems performing noncontact spectral reflectance measurements of plants and soil in real time has been described. A combination module allows three laser diodes of different wavelengths to sequentially emit identically polarized light beams through a common aperture, along one optical path. Each exiting beam enters an optical structure which generates up to 14 parallel laser beams. A pair of combination modules and optical structures generates 28 beams over a 420mm span which illuminates the plants from above. The intensity of the reflected light from …
Water Stress Vulnerability Of Four Banksia Species In Contrasting Ecohydrological Habitats On The Gnangara Mound, Western Australia, Caroline Canham
Water Stress Vulnerability Of Four Banksia Species In Contrasting Ecohydrological Habitats On The Gnangara Mound, Western Australia, Caroline Canham
Theses : Honours
The distribution of obligate and facultative phreatophytic vegetation reflects the gradient of ecohydrological habitats in a landscape. Preliminary investigations of Banksia vulnerability to xylem embolism have reported that obligate phreatophytes are more susceptible to water stress than facultative phreatophytes (Froend & Drake 2006). A quantitative measure of plant susceptibility to water stress is vital when establishing environmental water requirements. This study investigated interspecific differences in vulnerability to water stress for two facultative phreatophytes (B. attenuata and B. menziesii) and two obligate pln·eatophytes (B. ilicifolia and B. littoralis) at the same position along an ecohydrological gradient on the Gnangara Groundwater Mound, …
The Effects Of Light Reduction Treatments On Mobile Epifaunain An Amphibolis Griffithii (Black) Den Hartog Seagrass Ecosystem, Helen Barwick
The Effects Of Light Reduction Treatments On Mobile Epifaunain An Amphibolis Griffithii (Black) Den Hartog Seagrass Ecosystem, Helen Barwick
Theses : Honours
One of the main anthropogenic disturbances to seagrass meadows in Australia is reduction in light availability, through nutrient enrichment or suspended sediments. Dredging can create suspended sediment plumes from the expulsion of particulates into the water column and in tum reduces light penetration to seagrass ecosystems. Preliminary investigations have demonstrated that light reduction for different intensities and durations results in reduced seagrass and epiphytic algae biomass. The main aim of this study was to determine the effects of different intensities and durations of light reduction on epifaunal assemblages in Amphibolis griffithii seagrass meadows in Jurien Bay, Western Australia. This was …
The Functional Significance Of Multiple Pax7 Isoforms, Chantel L. Burchill
The Functional Significance Of Multiple Pax7 Isoforms, Chantel L. Burchill
Theses : Honours
The Pax7 gene is critical for specification of both neurons in the mid-brain and skeletal muscle satellite cells. Several alternate transcripts are transcribed from the single gene. Previous studies have shown that the resultant alternate Pax7 isoforms differ in the structure of their paired domain (a DNA-binding domain that influences target gene selection), yet the functional significance of each isoform for specification of neurogenic and myogenic cell types remains unknown. Although previous studies have identified the presence of multiple alternate Pax7 transcripts in both neurogenic and myogenic cell lines, more research is necessary to understand the functional significance of the …
Genetic Diversity And Gene Flow In Fragmented Populations Of The Rare Shrub, Calothamnus Sp. Whicher, Sean Stankowski
Genetic Diversity And Gene Flow In Fragmented Populations Of The Rare Shrub, Calothamnus Sp. Whicher, Sean Stankowski
Theses : Honours
Ca/othamnus sp. Whicher (Myrtaceae) is a narrow range endemic shrub restricted to ironstone soils near the town of Busselton in south-western Australia. Due to extensive land clearing for agriculture and mineral exploration, the species is fragmented over the majority of its range. In the present study, microsatellite markers were used to characterise levels of genetic diversity and describe levels of differentiation and gene flow among seven small, isolated road verge populations. Allelic diversity within the taxon over the six microsatellites was high (A = 17.6 ± 1.6). Diversity within populations was considerably lower (A = 5.19 ± 1.27), …
Determining Carbon And Nitrogen Stable Isotope Discrimination For Marine Consumers, Emily N. Gates
Determining Carbon And Nitrogen Stable Isotope Discrimination For Marine Consumers, Emily N. Gates
Theses : Honours
The application of stable isotope ratios to food web studies is increasing, and the use of generalised discrimination values (0.4±1.4%0 for δ13C and 3.4±1.1%0 for δ15N), which are being widely applied to many studies, may not be valid. The broad objective of this study was to evaluate the assumption that these discrimination values are applicable to a range of benthic marine consumers, and therefore appropriate to be used in trophic analyses using carbon (C) and nitrogen (N) stable isotopes in marine food webs. The first aim was to determine if there were differences in …
The Effectiveness Of A Home-Based, Patient-Specific, Functional Exercise Program On Patients With Inclusion Body Myositis (Ibm), Liam Johnson
Theses : Honours
Previous research has shown exercise to be beneficial in the treatment of myositis-affected patients. However, the potential of functional exercises to improve muscle strength and function in the absence of disease progression markers in patient's with Inclusion Body Myositis (IBM) is not well understood. It is believed that the initial exercise dose and patient specificity is of paramount importance in the successful use of this modality in the routine management and long term treatment of such patients. The objective of this study was to investigate the effects of a home-based, patient-specific functional exercise programme, including aerobic exercise and resistance training, …
Automated Photo-Identification Of Cetaceans : An Integrated Software Solution, Daniel Griggs
Automated Photo-Identification Of Cetaceans : An Integrated Software Solution, Daniel Griggs
Theses : Honours
This study investigates current techniques used for automated photo-identification of cetaceans (i.e. dolphins and whales). The primary focus constitutes various techniques that can be applied to identify and extract dorsal fins from digital photographs. A comprehensive analysis of these techniques demonstrates the most effective software solution. To further support this analysis, four prototypes are developed to demonstrate the effectiveness of each technique in a practical environment. The analysis bases its final conclusions on test results generated from these prototype software examples. Final conclusions provide recommendations for an effective, accurate, and practical software solution. This software solution allows dorsal fins to …
Neural Induction And Differentiation Of Stem Cells Using The Developmental Gene Pax7, Vijesh G. Vaghjiani
Neural Induction And Differentiation Of Stem Cells Using The Developmental Gene Pax7, Vijesh G. Vaghjiani
Theses : Honours
Neurodegenerative disorders are conditions that mainly affect the brain and the central nervous system (CNS). Each disease type is characterised by loss of function which results from death of a particular region. Interestingly enough, most of the time disease pathology is due to loss of specific cell types in the CNS. These pathological conditions have both high economic costs and social implications for society. To treat such conditions, either the lost cells must be replaced or the cells surrounding the damaged tissue must be induced to undergo repair to replace the lost cells. The former looks more achievable whereas the …
Pollen Characteristics Of Grevillea Species Determined By In Vitro Germination, Rebecca Parsons
Pollen Characteristics Of Grevillea Species Determined By In Vitro Germination, Rebecca Parsons
Theses : Honours
Germination of pollen in vitro is a common technique used to assess the ability of pollen to germinate under a variety of conditions. The ability to determine the viability of a pollen grain, and optimal conditions for maximum germination and storage are important for hybridisation. A means of storing pollen, while maintaining viability, enables inter-species hybridisation between species that are spatially and temporally (flowering time) separated. The ultimate aim of hybridisation is seed set and in order to increase this in a genus renowned for a very low fruit to flower ratio, maximum pollen germination must be obtained. Therefore, by …
Reintroduction Ecology Of Mala (Lagorchestes Hirsutus) And Merrnine (Lagostrophus Fasciatus) At Shark Bay, Western Australia, Blair Hardman
Reintroduction Ecology Of Mala (Lagorchestes Hirsutus) And Merrnine (Lagostrophus Fasciatus) At Shark Bay, Western Australia, Blair Hardman
Theses: Doctorates and Masters
The transfer of threatened animals from one location to another in order to benefit the species is a technique frequently used by animal conservation managers. However, very few of these relocations have experimentally assessed the relative merits and disadvantages of commonly used release techniques. Two species of hare-wallaby, mala (Lagorchestes hirsutus) and merrnine (Lagostrophus fasciatus), were reintroduced in August 2001 onto Peron Peninsula in Western Australia. These threatened species were reintroduced using two release strategies (soft versus hard release), and their subsequent movements and body condition were monitored using radio-telemetry and trapping.
Movement Patterns And Habitat Usage Of Shark Bay Dugongs, David K. Holley
Movement Patterns And Habitat Usage Of Shark Bay Dugongs, David K. Holley
Theses: Doctorates and Masters
In order to define small and large scale spatial and temporal individual movement patterns of dugongs (Dugong dugon) within the Shark Bay World Heritage Property (SBWHP) a total of 19 dugongs were fitted with remote location recording and transmitting devices. Combined locations from all units totalled over 10,000 locations. This spatial and temporal data was used to define movement patterns of dugongs within Shark Bay as well as areas of high use deemed to be indicative of foraging activity. Platform Transmitting Terminals (PTT?s) using the ARGOS location collection system tracked animals over large temporal scales with 4 animals tracked up …
The Ecology And Behaviour Of Varanus Mertensi (Reptilia: Varanidae), Phillip J. Mayes
The Ecology And Behaviour Of Varanus Mertensi (Reptilia: Varanidae), Phillip J. Mayes
Theses: Doctorates and Masters
This study examines numerous aspects of the ecology and behaviour of Merten's Water Monitor, Varanus mertensi (Reptilia: Varanidae) including; daily behaviour, diet, foraging behaviour, reproductive seasonality and daily and long-term movements. Findings from over two years of field study of V. mertensi found in waterbodies of both the Ord River Irrigation Scheme and surrounding East Kimberley/Victoria River Downs bioregion of Western Australia are presented. This study simultaneously broadens our understanding of the family Varanidae and provides insight into the life of a semi-aquatic faunal species found in waterbodies of the Ord River Irrigation Scheme.
The Influence Of Seabird-Derived Nutrients On Island Ecosystems In The Oligotrophic Marine Waters Of South-Western Australia, Sofie A. Harrison
The Influence Of Seabird-Derived Nutrients On Island Ecosystems In The Oligotrophic Marine Waters Of South-Western Australia, Sofie A. Harrison
Theses: Doctorates and Masters
Nutrient inputs from productive marine environments have been shown to directly and indirectly subsidise primary producers and consumers in terrestrial ecosystems (e.g. Polis and Hurd 1995; 1996; Anderson and Polis 1998; 1999). But does this theory hold true on islands surrounded by oligotrophic waters, which account for a significant proportion of the marine environment? The aim of the present study was to examine the applicability of the spatial subsidisation hypotheses proposed by Polis and his co-authors to an oligotrophic system in south-western region of Western Australia. These aims were achieved by comparing soil and plant nutrients, and the nitrogen stable …
Drying And Re-Wetting Of Organic Wetland Sediments: Biogeochemistry And Implications For Wetland Management, Beate Sommer
Drying And Re-Wetting Of Organic Wetland Sediments: Biogeochemistry And Implications For Wetland Management, Beate Sommer
Theses: Doctorates and Masters
In the past decade, increasing instances of eutrophication and acidification of wetlands on the Swan Coastal Plain (SCP), Western Australia, and particularly on the Gnangara groundwater mound, have coincided with gradually decreasing ground- and surface water levels. The processes involved in determining whether a wetland will acidify or become eutrophic (or both) as a result of drawdown are still poorly understood, especially on the SCP where there are strong links between wetland water quality and underlying geomorphology. For instance, many of the wetlands located on the wellbuffered geomorphic unit called the Spearwood dunes are eutrophic due to high nutrient loads, …
A Comparison Of Logging And Fire Disturbance On Biophysical Attributes Of The Northern Jarrah Forest, Alexander W. Watson
A Comparison Of Logging And Fire Disturbance On Biophysical Attributes Of The Northern Jarrah Forest, Alexander W. Watson
Theses: Doctorates and Masters
Ecologically sustainable forest management (ESFM) serves dual purposes: 1) to ensure the conservation of biodiversity, and 2) in production forest (forest managed for the production of timber and woodchips), to maintain an economically viable timber industry in perpetuity. A central axiom of ESFM is that any manipulation of a forest ecosystem should emulate the `natural' disturbance patterns of the forest. This is based on the assumption that forest communities have evolved with endogenous disturbance regimes and will be better able to cope if exogenous disturbance (e.g., logging) remains within natural levels and spatial and temporal bounds of intensity. The objective …
Detached Macrophyte Accumulations In Surf Zones: Significance Of Macrophyte Type And Volume In Supporting Secondary Production, Karen Ruth Crawley
Detached Macrophyte Accumulations In Surf Zones: Significance Of Macrophyte Type And Volume In Supporting Secondary Production, Karen Ruth Crawley
Theses: Doctorates and Masters
Detached macrophytes (sea grass and macroalgae) are transported from more offshore areas and accumulate in large volumes in surf zones, where they are commonly called wrack. In coastal regions in other parts of the world, wrack transported from one habitat to a second habitat can be considered as a "spatial subsidy" for the recipient habitat with significant consequences for community dynamics and food webs. The primary aim of this study was to determine the significance of the different components of wrack (i.e. sea grass and brown, red and green algae) as a direct and indirect food source and habitat for …
Soil Community Structure And Litter Decomposition Under Irrigated Eucalyptus Globulus In South Western Australia, Derek J. Swarts
Soil Community Structure And Litter Decomposition Under Irrigated Eucalyptus Globulus In South Western Australia, Derek J. Swarts
Theses: Doctorates and Masters
Plantations provide a range of benefits, including the potential to ameliorate salinity and soil erosion, enhance biodiversity, and provide timber and wood chips. They are increasingly important because of their role in carbon sequestration (Adolphson, 2000; Anonymous, 2005; Jones et al. , 2005; Kozlowski, 2002; Paul and Polglase, 2004). Recent research has highlighted the connection between plantation health and soil fertility (Johnston and Crossley Jr, 2002). Within an Australian context there is little published data on the composition of the soil and litter fauna and their contribution to litter decomposition under plantation systems (Adolphson, 2000). The Albany Effluent Irrigated Tree …