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Full-Text Articles in Life Sciences

Factors Influencing Roost Selection By Australian Tree Cavity-Roosting Bats, Niels Rueegger Jan 2019

Factors Influencing Roost Selection By Australian Tree Cavity-Roosting Bats, Niels Rueegger

Theses

Anthropogenic activities impact the roost resource of tree cavity-roosting bats. Aspects of artificial and maternity tree roost use were investigated. Bat box design elements were shown to be important to influence box microclimates and species-specific box use. Woodcement was identified as an alternative long-lasting box material. Concerns are raised about the effectiveness of bat boxes to offset tree hollows. Creation of cavities into trees was shown to be an alternative artificial cavity provision technique. Research within timber production forest indicated that a ‘retention forestry’ approach is suitable to ensure habitat complexity and continuity to accommodate differences in maternity roost requirements ...


Coral Reef Restoration Using Mass Coral Larval Enhancement, Dexter W. Dela Cruz Jan 2019

Coral Reef Restoration Using Mass Coral Larval Enhancement, Dexter W. Dela Cruz

Theses

Coral reef communities are rapidly declining worldwide due to increasing direct anthropogenic disturbances, including global climate change. Active management approaches are needed for effectively slowing and reversing coral loss on degraded reef systems to promote recovery. Research presented in this thesis includes fertilization experiments to optimize embryo and larval culture and testing three tiles types to determine suitable larval recruitment surfaces. Two successful coral restoration experiments, using many thousands of ex situ cultured larvae of two Acropora species, resulted in increased coral settlement and recruitment and re-establishing breeding corals on degraded reef sites in the northern Philippines.

Spawned eggs and ...


Ecosystem Calcification And Production In Two Great Barrier Reef Coral Reefs : Methodological Challenges And Environmental Drivers, Ashly Mcmahon Jan 2018

Ecosystem Calcification And Production In Two Great Barrier Reef Coral Reefs : Methodological Challenges And Environmental Drivers, Ashly Mcmahon

Theses

This thesis investigates the drivers of coral reef ecosystem metabolism and the abilities of the different methodologies and analytical approaches to accurately represent reef dynamics. It encompassed tracing natural nutrient additions through bird guano into a coral cay. Developing a new, automated system for measuring carbonate chemistry for coral reef metabolism and the effects of mass coral bleaching on ecosystem functioning were quantified. Overall, it showed that natural nutrient additions and bleaching differentially affect coral reef metabolism and that subtle differences in analytical methods, sampling approaches, and data interpretation techniques can cause significant variation in metabolic estimates.


Improving Coral Aquaculture For Reef Conservation And The Aquarium Trade, Alejandro Jose Tagliafico Guzman Jan 2018

Improving Coral Aquaculture For Reef Conservation And The Aquarium Trade, Alejandro Jose Tagliafico Guzman

Theses

I tested hypotheses about feeding, alternate ways to fix coral fragments to the substrate, and ways to enhance resilience against temperature stressors. Key findings of the study were: (1) no significant differences between day/night feeding for the studied coral species (2) fragments without polyps can be used in aquaculture as in a short time period they develop new polyps; (3) fragments fixed upside-down attach faster and wider over the substrate; and (4) a lipid enriched-diet enhances resilience against temperature stressors. The work may contribute to successful coral reef restorations and help develop sustainable coral aquaculture for the aquarium trade.


Understanding And Predicting Coccolithophorid Calcification In A Changing Ocean, Natasha Aisha Gafar Jan 2018

Understanding And Predicting Coccolithophorid Calcification In A Changing Ocean, Natasha Aisha Gafar

Theses

My project builds on previous work to derive a new biologically based model to describe the response of coccolithophorid growth, photosynthesis and calcification to changing carbonate chemistry (pCO2), which, also accounts for the effects of temperature and light. This model, was used to increase understanding of the interacting effects of light, temperature and CO2 on the two key coccolithophores Emiliania huxleyi and Gephyrocapsa oceanica. I also examined how changing light and pCO2 influenced the large coccolithophore Scyphosphaera apsteinii through both experiments and the application of the above model.


An Investigation Into The Effects Of Adjuvants On The Ovicidal Activity Of Neem Triterpenes, Donald Brushett Jan 2018

An Investigation Into The Effects Of Adjuvants On The Ovicidal Activity Of Neem Triterpenes, Donald Brushett

Theses

In this thesis we examine the effect of a range of different adjuvants on the ovicidal activity of neem triterpenes to the eggs of the two spotted mite (Tetranychus urticae (C L Koch)). Eight different adjuvants were tested in combination with a neem triterpene extract. Four of the adjuvants contain different compounds (monoterpenes, lecithins and ferrullic acid esters) which are known to interact with cell membranes and may be responsible for the observed penetration enhancement effect. Using a confocal microscope, Neem triterpenes, when applied in the presence of de-bittered neem oil, were observed to cross the egg shell barrier and ...


Mechanisms For Private Sector Investment In Plantation Forestry In Australia, Robert Louis Newman Jan 2018

Mechanisms For Private Sector Investment In Plantation Forestry In Australia, Robert Louis Newman

Theses

This thesis examines the prerequisites for a durable private sector investment policy for exotic softwood plantations and their management. Pinus radiata is used as a case study as it comprises about 80% of the Australian softwood plantation area, but the principles are generic for industrial plantations. The issue is topical as plantation areas have declined in recent years and significant expansion is needed to satisfy domestic demand. Issues canvased in this thesis include the challenges of long rotations, the costs of suitable land, and the possibility of a market for immature plantations. This study reveals that the industrial plantations cannot ...


Maximizing The Post-Release Survival Of Angler-Caught Yellowfin Bream (Acanthopagrus Australis) And Mulloway (Argyrosomus Japonicus), Darren Paul Reynolds Jan 2018

Maximizing The Post-Release Survival Of Angler-Caught Yellowfin Bream (Acanthopagrus Australis) And Mulloway (Argyrosomus Japonicus), Darren Paul Reynolds

Theses

Australian recreational fishing is managed by a combination of bag limits and minimum legal lengths. The assumption for the success of these arrangements is that few released fish die.

Two recreational species in Australia are yellowfin bream and mulloway. Owing to regulations and catch-and-release fishing a high proportion of the recreational catch of these species is released.

This study aimed to identify hooking and handling procedures effecting the post-release survival of these species and examine ways to maximise their post-release survival. The study concluded that modifications to gear and practices can maximise the post-release survival of yellowfin bream and mulloway.


Investigations Of Corridor Use By Arboreal And Scansorial Mammals And An Analysis Of Yellow-Bellied Glider (Petaurus Australis) Populations And Connectivity On The Lower Central Coast Of Nsw, Antony Von Chrismar Jan 2018

Investigations Of Corridor Use By Arboreal And Scansorial Mammals And An Analysis Of Yellow-Bellied Glider (Petaurus Australis) Populations And Connectivity On The Lower Central Coast Of Nsw, Antony Von Chrismar

Theses

This thesis focuses on the southern central coast of New South Wales, having five components: a landscape ecology literature review; investigation of how landscape design and habitat influences corridor use by arboreal mammals; a population viability analysis (PVA) of the yellow-bellied glider metapopulation; least-cost corridors for yellow-bellied glider; and a strategy for securing connectivity.

Corridor strategy success hinges on stakeholder engagement, corridor planning policies, developing incentives to conserve corridors and strategic gap crossing structures. Based on the PVA, lack of management will likely cause local extinction of the yellow-bellied glider metapopulation in the study area within 50-100 years.


Ocean Climate Impacts On The Primary And Secondary Metabolites Of A Muricid Mollusc, Roselyn Valles-Regino Jan 2018

Ocean Climate Impacts On The Primary And Secondary Metabolites Of A Muricid Mollusc, Roselyn Valles-Regino

Theses

This study examined the consequences of ocean climate change on the production of bioactive molecules and the lipid composition of Dicathais orbita. Exposure to elevated temperature and CO2 levels resulted in lower concentrations of the muscle relaxing choline ester murexine and the brominated indole tyrindoxyl sulphate, but higher amounts of 6-bromoisatin. The total yield of extract was not affected by elevated temperature or pCO2 treatments, but the composition of fatty acids was impacted, with a reduction in healthy polyunsaturated fatty acids under these conditions. This has potentially important implications for the production of marine secondary metabolites and ...


Balance And Trade : Charting The Course Of Fungal Symbiosis In Sugarcane Root Systems, Anders Christian Claassens Jan 2018

Balance And Trade : Charting The Course Of Fungal Symbiosis In Sugarcane Root Systems, Anders Christian Claassens

Theses

The root systems of sugarcane (Saccharum L. spp. hybrids) host a variety of symbiotic fungal organisms including arbuscular mycorrhizae (AM) fungi and dark septate endophytes (DSE). AM/DSE symbioses are widely reported to influence the productive capacity of a range of agricultural crops via enhanced nutrient assimilation and plant stress tolerance. Presently, the biological and functional characteristics AM/DSE in sugarcane have only been examined superficially and remain poorly understood. Before the potential benefits of AM/DSE symbioses can be exploited through management strategies, characterisation of the temporal changes in AM/DSE colonisation over the sugarcane crop cycle is required ...


More Than An Adrenaline Rush : A Study Of White Shark Cage-Dive Participants In Australia And The Potential To Encourage A Conservation Ethic, Kirin Therese Apps Jan 2018

More Than An Adrenaline Rush : A Study Of White Shark Cage-Dive Participants In Australia And The Potential To Encourage A Conservation Ethic, Kirin Therese Apps

Theses

Wildlife tourism is often promoted by government and industry as an activity which supports conservation by enhancing participant environmental knowledge, attitudes and behaviour. Despite speculation as to the conservation potential of wildlife tourism, empirical evidence to support such claims is limited. Globally, many shark species are facing significant population declines, yet conservation programs are often hampered by negative public perceptions. Sharks are one group of marine species which could benefit from the conservation potential of tourism. However, despite the rising popularity of shark-based tourism over the past two decades, little academic attention has focused on the human dimension of the ...


Impacts Of Glyphosate And Its Formulation On Soil Microbial Function, Binh Duy Nguyen Jan 2018

Impacts Of Glyphosate And Its Formulation On Soil Microbial Function, Binh Duy Nguyen

Theses

The herbicide glyphosate is an important tool for weed management, but there are concerns that it negatively impacts on soil health. The thesis examined the impact of glyphosate and a commercial formulation (RoundupCT®) on soil functions. A meta-analysis of published literature showed no impacts of glyphosate on soil microbial biomass (SMB) or respiration at field rates, but at higher doses inhibition of soil microbial biomass (SMB) was detected. Laboratory studies demonstrated that soil microbial communities and functions were generally resilient to high doses of glyphosate in loam and clay soils, but sandy soils were more at risk. Nevertheless, at field ...


Mollusc Assemblages Of Soft-Sediments In Subtropical Eastern Australia, Jennifer Marshall Jan 2018

Mollusc Assemblages Of Soft-Sediments In Subtropical Eastern Australia, Jennifer Marshall

Theses

Despite the dominance of soft-sediment habitats in marine ecosystems, their associated assemblages are often poorly understood in comparison to their counterparts in habitats such as reef. Baseline characterisation of habitats and communities is necessary to inform managers of the ecological resources they are charged with conserving. In New South Wales (NSW), Australia, a habitat classification scheme (HCS) is employed based on habitat types and water depth to inform conservation planning which aims to be comprehensive, adequate, and representative. This thesis evaluates the suitability of the HCS for soft-sediment by comparing mollusc assemblages spatially and temporally within two NSW marine parks.


Development Of An Eastern Australian Humpback Whale Photo-Identification Catalogue From Data Collected Aboard Whale Watch Operations, Peta Beeman Jan 2017

Development Of An Eastern Australian Humpback Whale Photo-Identification Catalogue From Data Collected Aboard Whale Watch Operations, Peta Beeman

Theses

The cyclical migration journey of the Group E1 subpopulation of humpback whales (Megaptera novaeangliae), follows approximately 3000 km of the eastern Australian coastal corridor. A strong trend towards recovery in this subpopulation of whales has also resulted in increased popularity of recreational whale watching along the eastern coast of Australia. This study focused on increasing knowledge of Group E1 humpback whales along the migration corridor by using ventral fluke photographs taken onboard whale watch vessels.

Data collection was undertaken between 2005 to 2014. Images contributed by citizen scientists were uploaded through a research website for collation and analysis. Data were ...


Agroecology And Sustainable Rural Livelihoods: Interdisciplinary Research And Development In The South Pacific, Cherise Addinsall Jan 2017

Agroecology And Sustainable Rural Livelihoods: Interdisciplinary Research And Development In The South Pacific, Cherise Addinsall

Theses

The aim of this thesis is to understand, recognise and support relationships between sustainable rural Ni-Vanuatu livelihoods and engagement in traditional and cash economies. Rural development literature tends to advocate for shifts to formal economies, while devaluing and displacing traditional ‘hybrid’ livelihoods. Agroecology supports traditional hybrid livelihoods by fostering ecologically, culturally and socially integrated practices and facilitating resilience though diversity of activities. This thesis contributes to the literature by attempting to conceptually and methodically synthesise two frameworks based on agroecology and sustainable livelihoods. These frameworks seek to provide an effective tool to enhance sustainable traditional hybrid livelihood strategies.


Biochemical Composition Of Turbinid Snails And Its Sensitivity To Ocean Climate Change, Roslizawati Ab Lah Jan 2017

Biochemical Composition Of Turbinid Snails And Its Sensitivity To Ocean Climate Change, Roslizawati Ab Lah

Theses

Information on the biochemical composition of under-utilised species, such as turban snails, is required to establish their nutritional quality, and improve consumer acceptance as a novel food source. Turbo militaris, Lunella undulata and L. torquata are large common gastropod species with overlapping distributions in eastern Australia. The edible foot tissue from these three species was analysed for comparison of their proximate composition, fatty acids and mineral elements. All species were found to have a high protein content and low lipid levels that are rich in polyunsaturated fatty acids (PUFAs), with a favourable ratio of omega–3/omega–6 PUFAs for ...


Behavioural And Biochemical Responses To Dietary Mercury Exposure In Two Commercially Important Marine Species, Cyntia Ayumi Yokota Harayashiki Jan 2017

Behavioural And Biochemical Responses To Dietary Mercury Exposure In Two Commercially Important Marine Species, Cyntia Ayumi Yokota Harayashiki

Theses

Mercury is a toxic metal with a global distribution. Studies on waterborne exposure to inorganic mercury in aquatic organisms showed changes in biochemical markers and behaviour. Few studies have focused on the effects of inorganic mercury ingestion. This thesis investigated dietary exposure of mercuric chloride to post-larvae and juveniles of Penaeus monodon and juvenile Acanthopagrus australis and showed that biochemical marker response depends on the organism, age (post-larvae or juvenile), tissue analysed (e.g. muscle and neurologic tissue) and exposure period (up to 16 days). Additionally, swimming behaviour was a sensitive parameter for post-larvae prawn studies, but not for juvenile ...


Study Of Fish Assemblages In Ecklonia Radiata Dominated Rock Reefs In Subtropical Eastern Australia And Dietary Analyses Of Three Species Of Generalist Predators Of The Family Labridae, Laura Sanchez Peregrin Jan 2017

Study Of Fish Assemblages In Ecklonia Radiata Dominated Rock Reefs In Subtropical Eastern Australia And Dietary Analyses Of Three Species Of Generalist Predators Of The Family Labridae, Laura Sanchez Peregrin

Theses

Spatial and temporal patterns of fish assemblages were examined for Ecklonia radiata dominated rocky reefs in subtropical eastern Australia. The wrasses Notolabrus gymnogenis, Ophthalmolepis lineolata and Pseudolabrus guentheri were the most abundant carnivorous species. Subsequent dietary analyses using DNA metabarcoding identified 70 different Operational Taxonomic Units in the gut contents of these species. The results provide novel information on prey diversity and suggest that these species occupy a high trophic level in the food web of kelp-dominated reef habitats in the region. The study also confirmed DNA metabarcoding as a powerful technique for dietary analysis of generalist predatory fish.


In Vitro And In Vivo Anti-Inflammatory Activity Of Extracts From A Marine Mollusc, Tarek Belkasm Ahmad Jan 2017

In Vitro And In Vivo Anti-Inflammatory Activity Of Extracts From A Marine Mollusc, Tarek Belkasm Ahmad

Theses

New drug leads for the treatment of inflammation are urgently needed. The main aim of this thesis was to assess the anti-inflammatory activity of the marine mollusc Dicathais orbita. Lipid extracts from the whole body and bromine indoles from the hypobranchial glands showed promising in vitro activity, inhibiting the production of nitric oxide, tumour necrosis factor and prostaglandin 2. The hypobranchial gland extract and 6-bromoisatin blocked the translocation of nuclear factor beta kappa into the nucleus of LPS-stimulated macrophages and prevented the development of acute lung inflammation in mice. Overall, this study identifies the marine whelk D. orbia as a ...


Interactions Between Sea Urchins And Their Predators In A Changing Ocean, Hannah Jo Sheppard Brennand Jan 2017

Interactions Between Sea Urchins And Their Predators In A Changing Ocean, Hannah Jo Sheppard Brennand

Theses

The notion of large scale patterns in biotic interaction strength has a long history in ecology, with the expectation that interactions will be stronger in the tropics than temperate regions. However, the empirical evidence has been mixed. In light of ongoing climate change and redistribution of species it is important to study interactions, such as those between predators and prey that shape community structure and ecosystem function. Prey defensive traits dictate susceptibility to predators, and behavioural, physical and chemical traits will influence the outcomes of predator-prey interactions in existing and novel systems. Here, a meta-analysis was used to test the ...


Can Whelks Contribute To Food Security And Human Health?, Bijayalakshmi Devi Nongmaithem Jan 2017

Can Whelks Contribute To Food Security And Human Health?, Bijayalakshmi Devi Nongmaithem

Theses

Food security is a fundamentally important challenge faced by our society. This inter-disciplinary research project investigated the extent to which marine whelks could be more effectively utilized as a functional food. Surveys of the shell fisheries in India indicated that there is significant wastage of whelk meat and industry surveys in Australia indicate there is good potential for whelk aquaculture. The whelks were found to have good nutritional properties and bioactive compounds, which supports their use in traditional medicine. This thesis shows the potential to maximize utilization and value-add whelk resources, as functional foods and natural medicines to support human ...


The Toxicity Of Physically And Chemically Dispersed Fuels To Antarctic Marine Invertebrates, Frances Jane Alexander Jan 2016

The Toxicity Of Physically And Chemically Dispersed Fuels To Antarctic Marine Invertebrates, Frances Jane Alexander

Theses

The risk of a major marine fuel spill in Antarctic waters is increasing, yet there are currently no adequate response methods to deal with such an event. Chemical fuel dispersants have not previously been used in Antarctica, but may offer an alternative solution for spill management. Very few data on the toxicity of physically and chemically dispersed fuels and fuel dispersants to Antarctic marine species are available, thus preventing informed management decisions. This research investigated the toxicity of three fuels commonly used in Antarctica (Special Antarctic Blend diesel, marine gas oil and an intermediate fuel oil) and of three dispersants ...


Assessment Of Physio-Chemical Parameters In Farmed Mulloway (Argyrosomus Japonicas) To Establish Optimal Post-Harvest Practice., Shiori Naka Jan 2016

Assessment Of Physio-Chemical Parameters In Farmed Mulloway (Argyrosomus Japonicas) To Establish Optimal Post-Harvest Practice., Shiori Naka

Theses

Creating and maintaining an optimal ‘cold chain’ (temperature-controlled supply chain) is crucial in aquaculture operations. Two primary determinants of cold chain effectiveness are the ability to accurately measure degradative processes in seafood, and harvest methods that maximize product desirable characteristics. This thesis uses an emerging fish aquaculture industry, the production of mulloway (Argyrosomus japonicus) in brackish-water ponds in northern New South Wales, Australia.

The thesis begins with an overview of the aquaculture industry and provides the biochemical background underpinning the K-value and allied indices of degradative processes in seafood. These rely upon comparing adenosine triphosphate (ATP) concentrations with those of ...


The Thorny Problem In A Changing Ocean : Responses Of The Coral-Eating Crown Of Thorns Starfish (Cots) To Ocean Warming And Acidification, And The Implications For Coral Reefs, Pamela Ziphillia Aro Kamya Jan 2016

The Thorny Problem In A Changing Ocean : Responses Of The Coral-Eating Crown Of Thorns Starfish (Cots) To Ocean Warming And Acidification, And The Implications For Coral Reefs, Pamela Ziphillia Aro Kamya

Theses

Increases in anthropogenic emissions of carbon dioxide are causing unprecedented warming and acidification of the world’s oceans. These global changes in ocean conditions have profound impacts on marine organisms and ecosystems. One of the most critical ecosystems under threat from global climate change are coral reefs. Throughout the Indo-Pacific region declines in coral reef cover from climate change has been exacerbated population outbreaks of the coral-eating crown of thorns starfish (COTS), Acanthaster planci. While it is understood how corals will respond to ocean warming and acidification, there is no knowledge of how this predator of corals will fare in ...


Putative Role For Bacterial Symbionts In The Biosynthetic Origin Of Tyrian Purple In Dicathais Orbita, A Muricidae Mollusc, Ajit Kumar Ngangbam Jan 2016

Putative Role For Bacterial Symbionts In The Biosynthetic Origin Of Tyrian Purple In Dicathais Orbita, A Muricidae Mollusc, Ajit Kumar Ngangbam

Theses

Muricidae molluscs are well known for the production of the historically important dye Tyrian purple, however the biosynthetic origin and the role of microbial symbionts in Tyrian purple production are not known. The broad objective of this thesis was to establish the biosynthetic origin and identify genes involved in the biosynthesis of bromoindole derivatives using culture and culture independent modern genomic approaches. This revealed the muricid Dicathais orbita and symbiotic Vibrios both have the capacity to produce indole precursors but specialised bacteria are required to produce the brominated precursor. This thesis offers new opportunities for sustainable production of Tyrian purple ...


The Effect Of The Marine Cyanobacterium Trichodesmium Erythraeum On Iron Speciation In Seawater, Hanieh Tohidi Farid Jan 2016

The Effect Of The Marine Cyanobacterium Trichodesmium Erythraeum On Iron Speciation In Seawater, Hanieh Tohidi Farid

Theses

Iron is an essential micronutrient for growth of all phytoplankton, and in particular cyanobacteria. It is hypothesised that conditions of iron starvation may influence the relative importance of mechanisms employed by microorganisms including release of superoxide and organic exudates rate into the extracellular environment. Overall, this thesis provides a modified ferrozine method for detection of dissolved total iron in the presence of high concentrations of organic ligands, as well as a better understanding of biochemical mechanisms by which the globally significant diazotrophic cyanobacterium Trichodesmium erythraeum (IMS101) potentially modifies the bioavailability of iron under various iron nutrition scenarios.


An Investigation Of The Symbiodinium Community Structure Following Two Consecutive Coral Bleaching Events At Lord Howe Island, Eastern Australia, Nadine M. Boulotte Jan 2016

An Investigation Of The Symbiodinium Community Structure Following Two Consecutive Coral Bleaching Events At Lord Howe Island, Eastern Australia, Nadine M. Boulotte

Theses

Global climate change affects the marine environment in various ways, including more frequent and intense mass coral bleaching events. Assessment of the potential for coral survival requires understanding of their adaptive capacity, which is strongly influenced by their Symbiodinium spp. symbionts. This thesis aims to investigate the Symbiodinium community structure and dynamics following two consecutive coral bleaching events at Lord Howe Island, the world’s southernmost coral reef. The research results provide evidence of symbiont shuffling, but more importantly of switching, which will likely to lead to a paradigm shift in our understanding of the mechanisms of environmental acclimatisation in ...


Accelerated Domestication Of Australian Native Grass Species Using Molecular Tools, Sylvia Malory Jan 2014

Accelerated Domestication Of Australian Native Grass Species Using Molecular Tools, Sylvia Malory

Theses

In this study the rice (Oryza sativa) genome sequence was used for comparison with corresponding genes in Microlaena stipoides, a distant relative of rice. M. stipoides whole genome sequence was assembled to the rice genome to generate species specific polymerase chain reaction (PCR) primers for putative BADH2, GW2 and Hd6 homologues in M. stipoides. Pooled PCR amplicons were generated and then screened using the Illumina Genome Analyzer II to discover single nucleotide polymorphisms (SNPs). These SNPs were then validated by Sequenom iPlex MassARRAY. Potentially useful SNPs can be used in establishing new breeding lines of M. stipoides.


Injury, Physiological Stress And Mortality Of Recreationally Discarded Crustaceans In New South Wales, Australia, Jesse Carl Leland Jan 2014

Injury, Physiological Stress And Mortality Of Recreationally Discarded Crustaceans In New South Wales, Australia, Jesse Carl Leland

Theses

Australian recreational fishers discard large amounts of decapod crustaceans each year, but no formal studies have investigated their fate. To assess this, Scylla serrata, Portunus pelagicus and Sagmariasus verreauxi were trapped in New South Wales using popular recreational trap designs, before subsequent assessment of injury, physiological stress and mortality were made. For all species, physiological changes were generally transitory and capture-related injury was mostly non-lethal. Some S. verreauxi died (3.3%) from within-trap predation and minimal trapping-related P. pelagicus mortality occurred (1.1%). No S. serrata died. The results support the use of mandatory discarding to help control stock ...