A5078716665- Marine and fisheries research
- Fish Ecology and Management Studies
- Isotope Analysis in Ecology
- Marine Bivalve and Aquaculture Studies
- Fish Biology and Ecology Studies
- Coral and Marine Ecosystems Studies
- Genetic diversity and population structure
- Marine animal studies overview
- Coastal and Marine Management
- Identification and Quantification in Food
- Marine and coastal ecosystems
- Aquatic and Environmental Studies
- Environmental DNA in Biodiversity Studies
- Ocean Acidification Effects and Responses
- Fish biology, ecology, and behavior
- Extraction and Separation Processes
- Water Quality and Pollution Assessment
- Aquatic Invertebrate Ecology and Behavior
- Marine and environmental studies
- Wildlife Ecology and Conservation
- Freshwater macroinvertebrate diversity and ecology
- Ecology and biodiversity studies
- Marine Biology and Ecology Research
- Cruise Tourism Development and Management
- Hydrology and Sediment Transport Processes
Secretariat of the Pacific Community
2013-2025
Arthur Rylah Institute for Environmental Research
2006-2021
University of Iceland
2014-2021
The University of Melbourne
2017-2018
South Australian Research and Development Institute
2012
Griffith University
2010
University of Tasmania
2007
Southern smelts (Retropinna spp.) in coastal rivers of Australia are facultatively diadromous, with populations potentially containing individuals diadromous or wholly freshwater life histories. The presence is expected to reduce genetic structuring between river basins due larval dispersal via the sea. We use otolith chemistry distinguish and nondiadromous histories population genetics examine interbasin connectivity resulting from diadromy. Otolith strontium isotope ((87) Sr:(86) Sr)...
ABSTRACT Climatic variation can play a critical role in driving synchronous and asynchronous patterns the expression of life history characteristics across vast spatiotemporal scales. The synchronisation traits, such as an individual's growth rate, under environmental stress may indicate loss phenotypic diversity thus increased population vulnerability to stochastic deleterious events. In contrast, favourable ecological conditions asynchrony during unfavourable help resilience buffer against...
Otolith chemical analyses (proton‐induced X‐ray emission and laser ablation inductively coupled plasma mass spectrometry) were used to examine patterns of diadromy in Australian grayling Prototroctes maraena collected from three rivers south‐eastern Australia. Concentrations Sr:Ca Ba:Ca measured the sagittal otoliths 25 fish water samples on two occasions multiple sites within freshwater, estuarine marine reaches rivers. The results provide evidence residency during juvenile phase, with high...
Abstract Movement between habitats in river fish assemblages is often restricted by instream structures such as culverts. The ability of diadromous common jollytail, Galaxias maculatus (Jenyns), and spotted galaxias, truttaceus (Val.), to pass upstream through an situ pipe culvert modified the installation baffles was assessed. Spoiler (100 × 70 28 or 56 mm) were installed three spatial arrangements along a 5.5‐m section pipe, individual passage assessed at flow velocities (0.35, 0.70 1.0 m...
Patterns of dispersal in riverine populations Australian smelt ( Retropinna semoni ) were examined using otolith chemistry (Mg:Ca, Mn:Ca, Sr:Ca, Ba:Ca) and genetic markers (allozymes, mtDNA, microsatellite DNA). During a period prolonged low flows, young-of-year collected from 13 streams within three catchments the southern Murray–Darling Basin, Australia. Spatial differences core edge chemical signatures high levels assignment to sampling locations observed, suggesting that most recruits...
Defining the ecological impacts conferred by invasive fishes provides a framework for evaluating feasibility of control efforts in invaded waterways, and predicting consequences future incursions. Eastern gambusia (Gambusia holbrooki) is remarkably successful invader freshwater systems worldwide, with capacity to detrimentally impact native both directly (e.g. competition, predation, agonistic interactions) indirectly triggering trophic cascades). Here, we modelled influence eastern several...
Abstract Fish growth underpins individual fitness and population-level metrics, with fluctuations linked to environmental variability. Growth chronologies derived from otolith increment analysis are a powerful proxy understand population responses change productivity. Yet, long-term patterns of their drivers better understood for shallow-water species compared deep-water inhabitants. Additionally, focus is largely on adults, disregarding the potential influence juvenile which critical size-...
Abstract Laser ablation‐inductively coupled plasma mass spectrometry has been widely used in studies aimed at identifying the natal sites of fish through analysis otolith core region. It is critical, then, that measurements chemistry accurately represent chemical environment, rather than reflecting potential physiological and ontogenetic influences on elemental incorporation during embryonic early larval phases. We analyzed sagittal otoliths from 840 age‐0 age‐1 Australian smelt Retropinna...
Understanding migratory requirements is critical for the conservation of diadromous fishes. Tupong (Pseudaphritis urvillii) are fishes found in freshwater and estuarine regions south-eastern Australia. Previous studies have hypothesised that mature female tupong undertake downstream spawning migrations from to estuary or sea, with a compensatory return juveniles, possibly spent fish, back upstream. We applied acoustic telemetry test this hypothesis. tagged 55 two river systems Victoria,...
The contributions of nursery habitats to recruitment non-native common carp (Cyprinus carpio) were estimated via analysis water and otolith 87 Sr/ 86 Sr trace element concentrations (Mg:Ca, Mn:Ca, Sr:Ca, Ba:Ca) over 3 years in the Lachlan River, Australia. Water samples otoliths postlarval analyzed characterize multi-elemental signatures habitats. Considerable temporal variation occurred both signatures, which limited our ability directly match nurseries lower catchment. However, spatial was...
Understanding the migratory behaviour of fishes is critical to conservation and management fish assemblages in coastal rivers. We analysed otolith chemical signatures smelt, Retropinna sp., from inland populations mainland south-eastern Australia determine whether individuals within species were diadromous. Assessments composition combined with water chemistry data used make inferences about migration histories individual fish. A proportion smelt collected freshwater reaches a river...
Migratory life cycles and population structure of 2 putatively diadromous Australian fishes were examined using otolith chemistry (87Sr/86Sr) genetics (microsatellites mitochondrial deoxyribonucleic acid [mtDNA]). whitebait (Lovettia sealii) is widely considered to be one only a few anadromous fish species in the southern hemisphere. The congolli or tupong (Pseudaphritis urvillii) reported undertake an unusual form sexually segregated catadromous migration, where females switch habitats...
Summary Amphidromy, the dispersal of larvae to estuarine or marine environment with juveniles recolonising fresh waters complete development, is common on tropical islands. This has led suggestion that amphidromy an adaptation hydrologically unpredictable environments, allowing recolonisation after local extinction (dispersal‐limitation hypothesis). Alternatively, may be more in streams stronger flow, as high tractive forces flush into estuarine/marine environment, forcing them recolonise...
The biological status of many commercially exploited fishes remains unknown, mostly due to a lack data necessary for their assessment. Investigating the spatiotemporal dynamics such species can lead new insights into population processes and foster path towards improved spatial management decisions. Here, we focused on striped red mullet (Mullus surmuletus), widespread yet data-limited high commercial importance. Aiming quantify range in this data-poor scenario, combined fishery-dependent...
Summary Spawning migration by freshwater eels to their marine spawning grounds is widely considered be direct and rapid; however, emerging evidence suggests that eel migratory behaviour more complex than previously thought, with potential implications for conservation management. Over a 5‐year period, we tagged 97 yellow‐phase short‐finned Anguilla australis acoustic transmitters in the reaches of south‐eastern Australian river to: (i) examine environmental correlates associated seaward...
The chemical composition of common carp Cyprinus carpio asteriscus (vaterite) and lapillus (aragonite) otoliths from the same individual reflecting growth period was measured to (1) determine whether there are differences in uptake trace metals (Mg:Ca, Mn:Ca, Sr:Ca Ba:Ca ) Sr isotope ratios ( 87 Sr: 86 Sr) co‐precipitating lapilli asterisci (2) compare ability multi‐element isotopic signatures lapilli, both otolith types combined discriminate C. populations over a large spatial scale within...
Abstract. Coupled physical–biological models usually resolve only parts of the trophic food chain; hence, they run risk neglecting relevant ecosystem processes. Additionally, this imposes a closure term problem at respective “ends” levels considered. In study, we aim to understand how implementation higher in nutrient–phytoplankton–zooplankton–detritus (NPZD) model affects simulated response using consistent NPZD–fish modelling approach (ECOSMO E2E) combined North Sea–Baltic Sea system....
Abstract Sample cross-contamination remains a pervasive issue in genetics and genomics. With growing reliance on molecular methods for managing marine resources, the need to ensure integrity of tissue samples that underpin these has never been more pressing. We conducted an experiment wild-caught bigeye tuna (Thunnus obesus) assess risk under seven at-sea laboratory-based sampling treatments. The six treatments (T1–T6) differ equipment, cleaning, storage procedures. Combining observed...
Social learning can be fundamental to cohesive group living, and schooling fishes have proven ideal test subjects for recent work in this field. For many species, both demographic factors, inter‐ (and intra‐) generational information exchange are considered vital ingredients how movement decisions reached. Yet key is often missing on the spatial outcomes of such decisions, questions concerning migratory traditions influenced by collective memory, density‐dependent density‐independent...
Delineating the stock structure of highly-mobile, wide-ranging fishes subject to exploitation is a challenging task, yet one that fundamental optimal fisheries management. A case in point are stocks skipjack tuna (Katsuwonus pelamis), yellowfin (Thunnus albacares), bigeye obesus) and albacore alalunga) Pacific Ocean, which support important commercial, artisanal, subsistence, recreational fisheries, contribute roughly 70 % global commercial catches. Although some spatial temporal structuring...