A5006472383- Ichthyology and Marine Biology
- Fish Ecology and Management Studies
- Marine animal studies overview
- Marine and fisheries research
- Fish Biology and Ecology Studies
- Anomaly Detection Techniques and Applications
- Remote Sensing and LiDAR Applications
- Coral and Marine Ecosystems Studies
- Identification and Quantification in Food
- Marine and coastal plant biology
- Traffic Prediction and Management Techniques
- Marine Biology and Ecology Research
- Echinoderm biology and ecology
- Animal Behavior and Reproduction
- Isotope Analysis in Ecology
- Wildlife Ecology and Conservation
- Physiological and biochemical adaptations
- Cephalopods and Marine Biology
- Functional Brain Connectivity Studies
- Paleontology and Evolutionary Biology
- Fish biology, ecology, and behavior
- Wildlife Conservation and Criminology Analyses
- Animal Vocal Communication and Behavior
- EEG and Brain-Computer Interfaces
- Neural dynamics and brain function
Sydney Institute of Marine Science
2015-2024
New South Wales Department of Primary Industries
2022-2024
Government of New South Wales
2022
The University of Sydney
2004-2014
Understanding movement and connectivity of populations is increasingly important as human climate change pressures become more pervasive, but can be problematic in difficult to observe species such large marine predators. We examined the movements bull sharks, Carcharhinus leucas, using acoustic telemetry arrays along east coast Australia. Approximately half 75 individuals released temperate waters moved into tropical reef regions, with both sexes undertaking long-range multiple making...
Abstract Delineation of population structure (i.e. stocks) is crucial to successfully manage exploited species and address conservation concerns for threatened species. Fish migration associated movements are key mechanisms through which discrete populations mix thus important determinants structure. Detailed information on fish becoming more accessible advances in telemetry analysis methods however such not yet used systematically stock assessment. Here, we described how detections...
Abstract The Bull Shark ( Carcharhinus leucas ) faces varying levels of exploitation around the world due to its coastal distribution. Information regarding population connectivity is crucial evaluate conservation status and local fishing impacts. In this study, we sampled 922 putative Sharks from 19 locations in first global assessment structure cosmopolitan species. Using a recently developed DNA‐capture approach (DArTcap), samples were genotyped for 3400 nuclear markers. Additionally,...
Abstract Acoustic telemetry enables spatial ecologists to collect movement data from a variety of aquatic species. In estuaries and rivers, accounting for the complex shape water bodies is challenging. Current methods analysing utilization distributions (UDs) are restricted using locations receivers where animals have been detected, which limits information available estimate paths. We present new r package (RSP—Refined Shortest Paths) movements tracked with acoustic transmitters in...
Information about spatial and temporal variability in the distribution abundance of shark-populations are required for their conservation, management to update measures designed mitigate human-shark interactions. However, because some species sharks mobile, migratory occur relatively small numbers, estimating patterns can be very difficult. In this study, we used a hierarchical sampling design examine differences composition species, size- sex-structures sampled with bottom-set longlines...
Abstract Bull sharks (Carcharhinus leucas) are known to frequent nearshore environments, particularly estuaries, resulting in interactions with humans. Knowledge of the behaviour large individuals temperate, estuarine environments is limited. This acoustic telemetry study reports on residency and movement patterns 40 sub-adult adult bull Sydney Harbour, a temperate estuary, over seven years. exhibited clear seasonal their occurrence during austral summer autumn, abundance peaking January...
Patchiness of habitat has important influences on distributions and abundances organisms. Given the increasing threat loss alteration habitats due to pressures associated with humans, there is a need for ecologists understand species' requirements predict changes taxa under various future environmental conditions. This study tested hypotheses about generality patterns described one species marine intertidal turban snail different, yet closely-related in subtidal along coast New South Wales,...
Abstract Background Acoustic telemetry has become a fundamental tool to monitor the movement of aquatic species. Advances in technology, particular development batteries with lives > 10 years, have increased our ability track long-term patterns many However, logistics and financial constraints often dictate locations deployment duration acoustic receivers. Consequently, there is compromise between optimal array design affordability. Such can hinder marine animals over large spatial...
Knowledge of population structure, connectivity, and effective size remains limited for many marine apex predators, including the bull shark Carcharhinus leucas. This large-bodied coastal is distributed worldwide in warm temperate tropical waters, uses estuaries rivers as nurseries. As an predator, likely plays a vital ecological role within food webs, but at risk due to inshore habitat degradation various fishing pressures. We investigated shark's global structure demographic history by...
AbstractUnifying models have shown that the amount of space used by animals (e.g., activity space, home range) scales allometrically with body mass for terrestrial taxa; however, such relationships are far less clear marine species. We compiled movement data from 1,596 individuals across 79 taxa collected using a continental passive acoustic telemetry network receivers to assess allometric scaling space. found ectothermic do exhibit an overall exponent 0.64. However, alone explained only 35%...
Conservation measures often result in a “wicked problem,” i.e., complex problem with conflicting aims and no clear or straightforward resolution without severe adverse effects on one more parties. Here we discuss novel approach to an ongoing problem, which actions reduce risk humans, involve lethal control of otherwise protected species. To protect water users, nets are used catch potentially dangerous sharks at popular bathing beaches, yet Australian waters the targeted species, white shark...
Abstract Greater Sydney is the largest coastal city in Australia and where bull sharks ( Carcharhinus leucas ) are present every summer autumn. A decade of acoustic telemetry data was used to identify drivers space use for their potential prey, according standardised 6-h intervals using dynamic Brownian bridge movement models. Influences environmental, physical, biological variables on areas use, location, predator–prey co-occurrence were investigated with generalised additive mixed Rainfall...
Unprovoked shark bites have increased over the last three decades, yet they are still relatively rare. Bull sharks globally distributed throughout rivers, estuaries, nearshore areas and continental shelf waters, capable of making long distance movements between tropical temperate regions. As this species is implicated in their range, knowledge environmental drivers bull important for better predicting likelihood occurrence at ocean beaches potentially assist reducing bites. Using largest...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 340:89-99 (2007) - doi:10.3354/meps340089 Small-scale variability in dispersion of sea urchin Heliocidaris erythrogramma among boulders A. F. Smoothey*, M. G. Chapman Centre for Research on Ecological Impacts Coastal Cities, Laboratories A11, University Sydney, New South Wales 2006, Australia *Email:...
The Australian cownose ray ( Rhinoptera neglecta ) is an understudied batoid that occurs along Australia's north and east coasts. Currently classified as Data Deficient on the IUCN Red List of Threatened Species, major knowledge gaps exist regarding species' geographic range, habitat use drivers influencing its presence in coastal waters. Sightings R. were collected during systematic aerial surveys conducted 980 km (~47%) New South Wales (NSW) coastline between 2017 2019. North-bound flown...
Abstract Aim Biogeographic boundaries and genetic structuring have important effects on the inferences interpretation of effective population size ( N e ) temporal variations, a key genetics parameter. We reconstructed historical demography divergence history vulnerable coastal high‐trophic shark using genomics assessed our ability to detect recent bottleneck events. Location Western Central Indo‐Pacific (IPA), Tropical Atlantic (WTA) Eastern Pacific (EPA). Taxon Carcharhinus leucas (Müller...
Human-shark conflict has been managed through catch-and-kill policies in most parts of the world. More recently, there a greater demand for shark bite mitigation measures to improve protection water users whilst minimizing harm non-target and target species, particularly White Sharks (Carcharodon carcharias), given their status as Threatened, Endangered, or Protected (TEP) species. A new non-lethal method, known Shark-Management-Alert-in-Real-Time (SMART) drumline, alerts responders when an...
Teeth are an integral component of feeding ecology, with a clear link between tooth morphology and diet, as without suitable dentition prey cannot be captured nor broken down for consumption. Bull sharks, Carcharhinus leucas, undergo ontogenetic niche shift from freshwater to marine habitats, which raises the question: does change ontogeny? Tooth shape, surface area thickness were measured using both morphometrics elliptic Fourier analysis determine if varied position in jaw there was...
There is increasing support for shark bite mitigation measures, such as SMART (Shark-Management-Alert-in-Real-Time) drumlines that minimise impacts on target sharks and other marine animals. On the east coast of Australia, are used in a management program to catch relocate white (Carcharodon carcharias), tiger (Galeocerdo cuvier), bull (Carcharhinus leucas; herein referred sharks). This study examines effect bait position relative seabed drumline catches eastern Australian waters, aiming...
Understanding the population structure of a species is important to accurately assess its conservation status and manage risk local extinction. The Bull Shark ( Carcharhinus leucas ) faces varying levels exploitation around world due coastal distribution. Information regarding connectivity crucial evaluate fishing impacts. In this study, we sampled 922 putative Sharks from 19 locations in first global assessment cosmopolitan species. Using recently developed DNA-capture approach (DArTcap),...