A5038174917- Marine and fisheries research
- Fish Ecology and Management Studies
- Isotope Analysis in Ecology
- Marine Bivalve and Aquaculture Studies
- Coral and Marine Ecosystems Studies
- Fish Biology and Ecology Studies
- Cephalopods and Marine Biology
- Marine Biology and Ecology Research
- Aquaculture Nutrition and Growth
- Veterinary Pharmacology and Anesthesia
- Reproductive biology and impacts on aquatic species
- Agricultural Systems and Practices
- Geology and Paleoclimatology Research
- Marine animal studies overview
- Aquatic Ecosystems and Biodiversity
- Physiological and biochemical adaptations
- Chemical synthesis and alkaloids
- Identification and Quantification in Food
South Australian Research and Development Institute
2016-2025
The University of Adelaide
2012-2024
Wells National Estuarine Research Reserve
2009-2010
University of Southern Mississippi
2009
Abstract Biogeochemical tracers found in the hard parts of organisms are frequently used to answer key ecological questions by linking organism with environment. However, biogeochemical relationship between environment and biogenic structure becomes less predictable higher as physiological processes become more complex. Here, we use simultaneous combination fish growth analyzed a novel modeling framework describe environmental controls on otolith chemistry an upwelling zone. First, develop...
Abstract Identifying trends and drivers of fish growth in commercial species is important for ongoing sustainable management, but there a critical shortage long‐term datasets marine systems. Using otolith (ear bone) sclerochronology mixed‐effects modeling, we reconstructed nearly four decades (37 yr) across oceanographically diverse regions an iconic fishery species, snapper ( Chrysophrys auratus ). Growth was then related to environmental factors (sea surface temperature, chlorophyll‐ ,...
Growth modelling is a fundamental component of fisheries assessments but often hindered by poor quality data from biased sampling. Several methods have attempted to account for sample bias in growth analyses. However, many cases this not overcome, especially when large individuals are under-sampled. In models, two key parameters direct biological interpretation: L 0 , which should correspond length-at-birth and ∞ approximate the average length full-grown individuals. Here, we present an...
Tolerance and adaptability to changing environmental parameters have made Nile tilapia Oreochromis niloticus (Linnaeus, 1758) a hardy desirable aquaculture species. These traits also enabled this fish become highly successful invasive species into temperate subtropical aquatic environments. Otolith-based ages of (41.3 – 400.0 mm TL, 1.34 1,293 g WW, n = 259) collected from power plant cooling reservoir the Pascagoula River proper indicated that feral populations overwintered reaching up 4+...
Abstract Most platforms for collecting images to characterise marine benthic habitats involve a downward or forward‐facing field of view that is relatively constrained (~70°), covering small area benthos (downward ~1 m 2 , forward ~25 ). Here we propose the use four‐camera platform having wide combined (~280°), much greater (up 100 We also present stereo‐camera configuration has added benefit being able accurately measure sample and dimensions biota. The design proposed robust self‐righting,...
Understanding an animal's metabolic rate and thermal history is pivotal for ecological research. Recent studies have proposed the use of stable carbon oxygen isotopes (δ13C δ18O) in biogenic carbonates as proxies experienced temperature, respectively, to overcome challenges directly measuring these data field. Our study represents first experimental investigation develop δ13C δ18O octopus. Octopus berrima hatchlings were raised captivity, at varying water temperatures, up 110 days. O....
Across the world’s oceans, our knowledge of habitats on seabed is limited. Increasingly, video/imagery data from remotely operated underwater vehicles (ROVs) and towed drop cameras, deployed vessels, are providing critical new information to map unexplored benthic (seabed) habitats. However, these vessel-based surveys involve considerable time personnel, costly, require favorable weather conditions, difficult conduct in remote, offshore, deep marine habitats, which makes mapping surveying...
Silver perch, Bairdiella chrysoura (Lacepède) [n = 485, 70.0–171.0 mm standard length (SL)] were collected from April 2002 through June 2003 in estuaries along the coast of Mississippi to quantify their life history. Ages estimated sagittal otoliths ranged 0 4 yr. Adult females significantly longer and heavier than males at a given age. perch became sexually mature end first year (0 yr), with 50% sexual maturity population occurring 91–95 SL size class. Gonadosomatic index (GSI) values for...
Exploiting the chemical and growth properties of otoliths, this study demonstrates how environmental archives with high temporal resolution can be developed. Elemental profiles (Ba:Ca Sr:Ca) fish otoliths (ear bones) from estuarine species Acanthopagrus butcheri (black bream) were related to increments on a seasonal time scale. A series mixed effects models used investigate biological, temporal, factors influencing otolith elemental profiles. Resultant seasonally resolved chronologies...
This paper documents the discovery of a large sardine (Sardinops sagax) resource off South-eastern Australia. We use information from three ichthyoplankton surveys for jack mackerel to apply Daily Egg Production Method (DEPM) stock. Mean daily egg production was estimated survey data. Spawning area and using habitat suitability model predict presence/absence eggs in unsurveyed areas. biomass calculated adult parameters adjacent Southern The spawning surveyed 262,564 t (95% CI 125,670–326–438...
Abstract The capacity to reliably identify fish eggs is critical in the application of daily egg production method ( DEPM ) estimate biomass commercially important species. This has largely been confined species that have easily identifiable eggs. Various molecular strategies used extend a broader range species, with recent approaches like situ hybridization ISH preserves integrity whole eggs, embryos or larvae recommended as suitable alternative over destructive procedures PCR . Here, we...
Abstract Age data are crucial for understanding and managing target species in commercial recreational fisheries. Octopus catches increasing worldwide, yet ageing methods still their infancy. age is estimated by counting growth increments stylets beaks. These have been validated as daily some or assumed to be other species. Here, we conducted an validation study on both the beaks of a octopus (Octopus berrima). Subsequently, compared assessed readability wild-caught O. berrima. We found that...
Abstract This paper reviews application of the Daily Egg Production Method (DEPM) to sardine (Sardinops sagax) off southern Australia between 1995 and 2019. Coefficients variation (CVs) estimates spawning biomass (SB) were reduced from 23–59% 8–12% by: (i) estimating mean daily egg production (P0), fraction (S), sex ratio (R) all historical data rather than annually; (ii) combining batch fecundity (F) female weight (W) into a single parameter, relative (F′ = F^/W). Total was estimated most...
Climate variability is a major cause of changes in marine ecosystems, including both the environment and many fish species.Understanding factors influencing key biological characteristics, such as growth, important for commercially targeted species because these characteristics are used stock assessments that inform fisheries management.In this study, otoliths were to examine growth rates chronologies 2 small pelagic species, common jack mackerel (Trachurus declivis) redbait (Emmelichthys...