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Anthelmintic Efficacy Of Rosemary Oil And Its Nanoemulsion Against The Monogenean Parasite, Zeuxapta Seriolae, In Yellowtail Kingfish (Seriola Lalandi), Md Reaz Chaklader, Lindsey Woolley, Hosna Gholipour-Kanani, Masashi Maita, Gavin Partridge

Fisheries Research Articles

This study evaluated the anthelmintic efficacy of rosemary oil delivered as a nanoemulsion compared with regular rosemary oil against the monogenean parasite Zeuxapta seriolae in yellowtail kingfish (YTK; Seriola lalandi). A 20-day feeding trial tested three dietary treatments: two levels of regular rosemary oil (providing 0.85 and 1.7 g cineole·kg−1 feed) and a rosemary-oil nanoemulsion (providing 0.85 g cineole·kg−1 feed), against a control diet without rosemary oil. Juvenile fish (293 ± 5 g) were pre-exposed to Z. seriolae oncomiracidia before the trial, resulting in an initial mean parasite abundance of 97 ± 4 per fish. At trial completion, plasma …

Evaluation Of Dietary Additives On Yellowtail Kingfish (Seriola Lalandi) Gut And Skin Health And Disease Resistance Against Photobacterium Damselae Subsp. Damselae, Md Reaz Chaklader, Lindsey Woolley, Chelsea Woods, Frances Stephens, Richard Smullen, Gavin Partridge

Fisheries Research Articles

The present study evaluated the effectiveness of five dietary additives in improving growth performance, gut and skin health and disease resistance against Photobacterium damselae subsp. damselae (Pdd) in yellowtail kingfish (YTK) (Seriola lalandi). The additives were top-coated onto a commercial diet. The five additives evaluated were brewer’s yeast (BY), a yeast-based mannan oligosaccharide (MOS), a polyphenol product, a monoglyceride product and a combination of MOS and a superoxide dismutase (SOD) product. The monoglyceride and polyphenol products were trialled at both a low and high inclusion level. Diets were fed to YTK in triplicate tanks for 55 days. The …

The Efficacy Of Rosemary Oil And Microencapsulated Essential Oils On Zeuxapta Seriolae Mitigation In Yellowtail Kingfish, Seriola Lalandi, Md Reaz Chaklader, Lindsey Woolley, Ross Woodward-Williams, Richard Smullen, Gavin J. Partridge

Fisheries Research Articles

Two additives, rosemary oil and a commercial herbal product (HP; AROTEC-G) containing garlic essential oil, carvacrol and thymol were investigated for their potential to reduce the parasitic burden in yellowtail kingfish (YTK; Seriola lalandi) infected with Zeuxapta seriolae. Naturally infected fish were fed diets supplemented with either 2.5 mL.kg−1 rosemary oil or two concentrations of HP (5 and 10 g.kg−1) for 20 days. At 10 and 20 days, the effect of the diets on parasite abundance was evaluated. Feed intake and growth were similar across treatments (p > 0.05). By day 10, both rosemary oil and HP significantly …

Successful Artificial Incubation And Juvenile-Rearing Of Dropped Eggs Of A Critically Endangered Freshwater Crayfish (Cherax Tenuimanus), Rodney Duffy Dr., Blaine Hodgson, Amber Quinn, Marcus Newman

Fisheries Research Articles

One-third of the world’s freshwater crayfish species face extinction risk, necessitating extreme and urgent conservation measures such as captive rearing. Little information exists on these measures for most threatened species. The hairy marron, Cherax tenuimanus (Parastacidae), is a critically endangered freshwater crayfish endemic to the Margaret River in south-western Western Australia. C. tenuimanus is being rapidly replaced by the smooth marron, Cherax cainii, a translocated congener, causing its progressive decline in range, and now it faces imminent extinction in the wild. Attempts at captive breeding have resulted in few occurrences of egg laying of C. tenuimanus, which ended in complete …

Recreational Boat Fishing Participation Varies Across Bioregional Fisheries In Western Australia, With Persistent Patterns Within Fisheries And Fisher Typologies Over Time, Karina L. Ryan, Eva Lai, Claire B. Smallwood, Jeremy M. Lyle, Kate E. Stark, Sean R. Tracey

Fisheries Research Articles

Recreational fishing is popular worldwide and understanding variability in participation can inform policies that seek to improve sustain[1]ability of recreational fisheries and amenity for recreational fishers. However, not all recreational fishers are alike in their demographics or behaviours. This study explores temporal and spatial variability in licensed boat-based recreational fishing participation in Western Australia using data from a consistent survey design delivered 12 times from 2011 to 2024. Five fisher participation typologies were identified across four marine bioregions (North Coast, Gascoyne Coast, West Coast, and South Coast) and four fishery types (demersal, nearshore, pelagic, and invertebrate) with varied fisher characteristics …

Advancing Fishery Dependent And Independent Habitat Assessments Using Automated Image Analysis: A Fisheries Management Agency Case Study, Scott Evans, Bronson Philippa, Carlo Mattone, Nick Konzewitsch, Renae Hovey, Marcus Sheaves, Gary A. Kendrick, Lynda M. Bellchambers

Fisheries Research Articles

Advances in artificial intelligence and machine learning have revolutionised data analysis, including in the field of marine and fisheries sciences. However, many fisheries agencies manage sensitive or proprietary data that cannot be shared externally, which can limit the adoption of externally hosted artificial intelligence platforms. In this study, we develop and evaluate two residual network-based automatic image annotation models to process fishery specific habitat data to support ecosystem-based fisheries management in the Exmouth Gulf Prawn Managed Fishery in Western Australia. Using an extensive dataset of 13,128 manually annotated benthic habitat images, we train a grid-based annotation model and an image-level …

Sustainable Fishmeal Alternatives: Impact Of Partially Defatted Black Soldier Fly (Hermetia Illucens) Meal On Growth And Health Of Yellowtail Kingfish (Seriola Lalandi), Luke Pilmer, Lindsey Woolley, Alan J. Lymbery, Michael Salini, Chinh Dam, Md Javed Foysal, Gavin Partridge

Fisheries Research Articles

Reducing fishmeal (FM) in aquaculture diets is essential for improving sustainability and reducing reliance on marine resources. Black soldier fly (BSF; Hermetia illucens) larvae meal is a promising alternative protein source. This study evaluated the effects of replacing FM with BSF meal on the growth and health of juvenile yellowtail kingfish (YTK) (Seriola lalandi, initial weight ~22 g). Fish were reared in 24 tanks (three replicates per treatment) and fed for 33 days under controlled conditions. Eight diets were tested: a control (40% FM) and seven diets with BSF meal replacing FM at 25%, 50%, or 75%, …

Transcriptional Profiles Reveal Physiological Mechanisms For Compensation During A Simulated Marine Heatwave In Yellowtail Kingfish (Seriola Lalandi), Sharon E. Hook, Ryan J. Farr, Jenny Su, Alistair J. Hobday, Catherine Wingate, Lindsey Woolley, Luke Pilmer

Fisheries Research Articles

Background

Changing ocean temperatures are already causing declines in populations of marine organisms. Predicting the capacity of organisms to adjust to the pressures posed by climate change is a topic of much current research effort, particularly for species we farm or harvest. To explore one measure of phenotypic plasticity, the physiological compensations in response to heat stress as might be experienced in a marine heatwave, we exposed Yellowtail Kingfish (Seriola lalandi) to sublethal heat stress, and used the transcriptome in gill and muscle, benchmarked against heat shock proteins and oxidative stress indicators, to characterise the acute heat stress …

Exploring Single Cell Microbial Protein As A Sustainable Fishmeal Alternative In Yellowtail Kingfish (Seriola Lalandi) Diets: Impacts On Health And Gut Microbiome, Luke Pilmer, Lindsey Woolley, Alan Lymbery, Chinh Dam, Abigail Elizur, Md Javed Foysal, Gavin Partridge

Fisheries Research Articles

Background

With the global expansion of aquaculture and the increasing demand for fish meal, identifying appropriate and sustainable alternative protein sources for aquafeeds has become essential. Single-cell protein (SCP), derived from methanotrophic bacteria, presents a promising alternative by converting methane into protein, potentially addressing both the need for alternative protein sources and reducing industrial greenhouse gas emissions. This study aimed to evaluate the effects of different levels of SCP inclusion (0%, 25%, 50%, and 75% fish meal replacement) on the health, gene expression, and gut microbiome of yellowtail kingfish (YTK, Seriola lalandi) following a 35-day growth trial.

Results

The …

Coverage Matters: Identifying And Mitigating Sampling Frame Issues In Recreational Fishing Surveys, Steve Taylor, Annica De Groote, Kieran Hyder, Jon Volstad, B W. Hartill, J Foster, R Andrews, Karina L. Ryan

Fisheries Research Articles

Surveys play an integral part in monitoring and maintaining sustainable recreational fisheries. For any probabilistic survey, the selection of a sampling frame (e.g., list of individuals or fishers) is an important decision because it influences the ability to provide unbiased estimates of recreational catch and effort. Undercoverage occurs when units of the target population (i.e., the population of interest) are missing from the frame population. This error can undermine the reliability of research advice generated from survey estimates. In this review, we: (i) define six sampling frame configurations that are commonly applied in probabilistic recreational fishing surveys; (ii) synthesise how …

Accounting For Post-Release Mortality In Data-Limited, Length-Based Assessments For Four Demersal Fish Species With Varying Life Histories, Brett Crisafulli, Sybrand A. Hesp, Ebenezer Afrifa-Yamoah, Ute A. Mueller, Karina L. Ryan, David V. Fairclough, Norman G. Hall, Johnny Lo

Fisheries Research Articles

Released (or discarded) fish from recreational and commercial line fisheries can experience significant levels of post-release mortality (PRM), affecting sustainability. Although PRM effects are often considered in data-rich (integrated model) assessments, this is uncommon in data-limited assessments. This study investigates impacts of PRM when applying data-limited, length-based assessment methods for four reef-dwelling demersal fish species in temperate Western Australia (Glaucosoma hebraicum, Chrysophrys auratus, Choerodon rubescens and Epinephelides armatus). These species differ considerably in their biology and susceptibility to PRM. For each species simulations were undertaken to (1) evaluate the reliability of a length-based catch curve (LBCC) …

Recreational Fishers’ Attitudes To Fisheries Management And Compliance, Karina L. Ryan, Clinton Syers, Kane Holtom, Timothy J. Green, Jeremy M. Lyle, Kate E. Stark, Sean R. Tracey

Fisheries Research Articles

Recreational fisheries policy decisions have social and ecological outcomes that depend on whether regulations are understood and meet expectations, which in turn enhances compliance. This study investigates perceptions of management and compliance among boat-based recreational fishers in Western Australia with consideration of demography (age, residence) and fishing behaviour (avidity, bioregion fished). Most respondents considered themselves to be informed about rules governing their fishing and there was strong support for current input and output controls, including area and seasonal closures and possession and size limits. There was less support for alternative regulations that are not currently in practice, such as annual …

On The Line And Online: Higher Non-Response To Web-Based Surveys Over-Represents Avid Recreational Fishers Compared With Telephone Surveys, Karina L. Ryan, Steve Taylor, Jeremy M. Lyle, Kate Stark, Sean R. Tracey

Fisheries Research Articles

Recreational fishing surveys have an important role in providing data to inform fisheries management. The selection of a contact method is an important and often challenging consideration that influences the potential for non-sampling errors that can result in unrepresentative data and biased estimates. Telephones are used for many off-site recreational fishing surveys, but widespread use of digital technology suggests that online surveys could be a viable alternative. We compared phone surveys with alternative online surveys using probability sampling from a licence database. Response rates were lower for online surveys (13%–26%) than phone surveys (97%–98%). The proportion of respondents who reported …

Density-Dependence Inside A Marine Protected Area Increases Natural Mortality And Stunts The Growth Of A Spiny Lobster, Emma-Jade Tuffley, Simon De Lestang

Fisheries Research Articles

Sustainable fisheries management often requires the modelling of stocks under unfished conditions, when the influence of population densities on animal growth and mortality can be substantial. This can be especially true for species such as spiny rock lobster, which are very habitat specific. Using western rock lobster (Panulirus cygnus) tag-recapture data from adjacent and similar fished and unfished areas, the key life history parameters of natural mortality and growth were examined and compared under different population density scenarios. In an area representative of virgin biomass levels, lobsters exhibited reduced growth rates and a substantially higher rate of natural mortality …

Estimation Of Effective Number Of Breeders And Effective Population Size In An Abundant And Heavily Exploited Marine Teleost, Andrea Bertram, Justin Bell, Chris Brauer, David Fairclough, Paul Hamer, Jonathan Sandoval-Castillo, Maren Wellenreuther, Luciano B. Beheregaray

Fisheries Research Articles

Obtaining reliable estimates of the effective number of breeders (Nb) and generational effective population size (Ne) for fishery-important species is challenging because they are often iteroparous and highly abundant, which can lead to bias and imprecision. However, recent advances in understanding of these parameters, as well as the development of bias correction methods, have improved the capacity to generate reliable estimates. We utilized samples of both single-cohort young of the year and mixed-age adults from two geographically and genetically isolated stocks of the Australasian snapper (Chrysophrys auratus) to investigate the feasibility of generating reliable Nb and Ne estimates for a …

Genomic Population Structure Of Great Hammerhead Sharks (Sphyrna Mokarran) Across The Indo-Pacific, Naomi L. Brunjes, Samuel M. Williams, Alexis L. Levengood, Matt K. Broadhurst, Vincent Raoult, Alastair V. Harry, Matias Braccini, Madeline E. Green, Julia L. Y. Spaet, Michael J. Travers, Bonnie J. Holmes

Fisheries Research Articles

Context

Currently, little information exists describing the population structure of great hammerhead sharks (Sphyrna mokarran) in Australian waters. Aims

This study used single nucleotide polymorphisms to investigate fine-scale population structure in S. mokarran across the Indo-Pacific. Methods

DNA was extracted from 235 individuals across six Australian locations and a Red Sea outgroup. Population parameters were calculated and visualised to test structuring across locations. Key results

No fine-scale population structuring was observed for S. mokarran across the Indo-Pacific. However, population structuring occurred for all Australian locations when compared to the Red Sea outgroup. Conclusions

Findings suggest a single stock …

The Social And Economic Dimensions Of One Of The World’S Longest-Operating Shark Fisheries, Matias Braccini, Maddison Watt, Clinton Syers, Nick Blay, Matthew Navarro, Michael Burton

Fisheries Research Articles

Context

Social and economic information is limited for coastal commercial and recreational fisheries, particularly shark fisheries, which are perceived as unsustainable and as targeting sharks for fins.

Aims

To characterise the social and economic dimensions of one of the world’s few long-standing sustainable shark fisheries.

Methods

We reviewed historic data and surveyed stakeholders to understand the economic and social dimensions of the shark fishery currently operating in Western Australia.

Key results

Since the fishery’s historic peak, there has been a substantial reduction in the number of operating vessels and ports due to management intervention. For the vessels that have remained, …

Variations In Life-History Traits In Exploited And Unexploited Populations Of Perth Herring (Nematalosa Vlaminghi): Evidence For Density-Dependent Growth?, Kimberley A. Smith, Sybrand Alexander Hesp, Peter Graham Coulson

Fisheries Research Articles

Results supported the hypothesis of faster growth in exploited populations because of density-dependent processes. Environmental factors may also have contributed to trait differences between populations.

Puerulus Settlement Forecasting In A Harvest Strategy Evaluation Of The Rock Lobster Fishery In South Australia, Richard Mcgarvey, Adrian Linnane, John E. Feenstra, Janet M. Matthews, Lachlan J. Mcleay, Annabel Jones, Kyriakos Toumazos, Simon De Lestang

Fisheries Research Articles

Harvest strategies are utilised in the management of fishery resources globally. Critical to their success is harvest strategy evaluation, whereby future performance is assessed through projection modelling. Using the observed relationship between a puerulus settlement index and model-estimated recruitment, we evaluated a southern rock lobster (Jasus edwardsii) harvest strategy in South Australia. Short-to-medium puerulus settlement recruitment forecasting was incorporated into future projections of catch, catch per unit effort, and percent unexploited egg production (%UEP) during 2019–2022. Observed values of indicators that closely aligned with projected outputs indicated that puerulus forecasting underpinned reliable evaluation of future fishery performance. A …

A Large-Scale Experiment Finds No Consistent Evidence Of Change In Mortality Or Commercial Productivity In Silverlip Pearl Oysters (Pinctada Maxima) Exposed To A Seismic Source Survey, Miles J G Parsons, Diego R. Barneche, Conrad W. Speed, Robert D. Mccauley, Ryan D. Day, Cecile Dang, Rebecca Fisher, Hosna Gholipour-Kanani, Stephen J. Newman

Fisheries Research Articles

High-intensity, impulsive sounds are used to locate oil and gas reserves during seismic exploration of the seafloor. The impacts of this noise pollution on the health and mortality of marine invertebrates are not well known, including the silverlip pearl oyster (Pinctada maxima), which comprises one of the world's last remaining significant wildstock pearl oyster fisheries, in northwestern Australia. We exposed ≈11,000 P. maxima to a four-day experimental seismic survey, plus one vessel-control day. After exposure, survival rates were monitored throughout a full two-year production cycle, and the number and quality of pearls produced at harvest were assessed. Oysters from two …

An Integrated Approach For Assessing The Survival Of Discarded Sandbar Sharks, Carcharhinus Plumbeus, Captured In Scientific Longlines, Taylor Grosse, Cynthia Awruch, Euan S. Harvey, Benjamin J. Saunders, Chris Dowling, Daniela Waltrick, Matias Braccini

Fisheries Research Articles

Context

The sandbar shark (Carcharhinus plumbeus) has a global distribution and is caught by commercial fishers and recreational anglers. Aims

To assess the stress physiology, release condition, and post-release survival of sandbar sharks caught in longline surveys conducted in Western Australia. Methods

Post-release survival of sandbar sharks caught in longlining surveys was assessed using an integrated approach that combined the use of hook-timers, qualitative release conditions, satellite-tagging, and blood physiology. Key results

Of 57 individuals examined, there was 100% post-capture survival after a maximum of 4 h on the hook. Most of these animals (88%) displayed a strong …

Observations Of The Association By Early-Juvenile Western Rock Lobster Panulirus Cygnus George, 1962 With Seagrass Assemblages (Decapoda: Achelata: Palinuridae), Daphne Oh, Tim J. Langlois, Michael A. Brooker, Hugo Salinas, Jason R. How, Simon De Lestang

Fisheries Research Articles

The fishery of the western rock lobster, Panulirus cygnus George, 1962, is Australia’s most valuable wild-caught single-species fishery. Recruitment in some regions of the fishery was observed to be significantly lower than expected after the 2010/2011 West Australian marine heatwave that caused extensive disturbance of dominant coastal habitats. This event generated interest in the study of the factors influencing survival and recruitment of post-larval benthic P. cygnus after settlement. The habitat associations of the highly cryptic post-settlement early-juveniles were previously unknown, with only anecdotal observations of individuals within limestone crevices in nearshore habitats. Our study used early-juveniles derived from …

Utility Of Body And Otolith Morphometry To Discriminate Cryptic Juveniles Of Two Sympatric Red Snappers (Perciformes: Lutjanidae), Miwa Takahashi, Corey B. Wakefield, Stephen J. Newman, Kyle B. Hillcoat, Benjamin J. Saunders, Euan S. Harvey

Fisheries Research Articles

The sympatric red snappers, Lutjanus erythropterus and Lutjanus malabaricus, are highly valued by commercial and recreational fishers along the tropical northern coasts of Australia and throughout their distribution. Studies on the life history and ecology of these congeners are confounded by difficulties in distinguishing the cryptic juveniles of each species (i.e., < 200 mm total length). This study aimed to validate a robust and cost-effective method to discriminate these juveniles using body and/or otolith morphometric data in a multivariate analysis. Juvenile samples were collected from the northwest (n = 71) and northeast (n = 19) coasts of Australia, and species identification was confirmed using DNA barcoding. The most parsimonious multivariate models achieved accurate species prediction rates of 98.8%, which consisted of just three body variables (dorsal fin length, the distance from the snout to the anterior edge of the eye, and either jaw length or distance from the snout to the preoperculum). The high level of discrimination for these cryptic juveniles highlights the robustness of this morphometric approach. The slightly lower rate of discrimination using otolith morphology (84.9%) was associated with greater regional variation in L. malabaricus between the northwest and northeast coasts. Slight variations in otolith shape are typically used to determine stock structure, which highlights the potential need to collect samples over a broader area of a species geographic range when using an otolith morphometric discrimination model. The method outlined in this study could be applied to distinguish other cryptic congeneric fish species, including from archived otolith collections. Moreover, this method has the potential to be utilized in assessing species compositions using body measurements from in situ stereo-video.

Initial Impacts Of The Covid-19 Pandemic On Australian Fisheries Production, Research Organisations And Assessment: Shocks, Responses And Implications For Decision Support And Resilience, Emily M. Ogier, David C. Smith, Sian Breen, Caleb Gardner, Daniel J. Gaughan, Harry K. Gorfine, Alistair J. Hobday, Natalie Moltschaniwskyj, Ryan Murphy, Thor Saunders, Michael Steer, James Woodhams

Fisheries Research Articles

Australia’s fisheries have experience in responding individually to specific shocks to stock levels (for example, marine heatwaves, floods) and markets (for example, global financial crisis, food safety access barriers). The COVID-19 pandemic was, however, novel in triggering a series of systemic shocks and disruptions to the activities and operating conditions for all Australia’s commercial fisheries sectors including those of the research agencies that provide the information needed for their sustainable management. While these disruptions have a single root cause—the public health impacts and containment responses to the COVID-19 pandemic—their transmission and effects have been varied. We examine both the impacts …

Fine-Scale Variability In Catch And Growth Rates Of Western Rock Lobsters (Panulirus Cygnus) Show Heterogeneous Life-History Parameters, A Miller, Jason How, Simon De Lestang, Brooke A. Gibbons, E Lester, M Navarro, J Fitzhardinge, Tim J. Langlois

Fisheries Research Articles

Context: The western rock lobster fishery is recognised to be conservatively managed, with breeding stock levels estimated to be at record levels over the past decade. Despite this, anecdotal reports from commercial fishers identified an area of unexpectedly low catches in the centre of the fishery and lobsters’ biogeographic distribution.

Aim: To confirm the presence of this suspected ‘low-catch’ zone and examine the variability in catch and growth rates of lobsters if identified.

Methods: This study conducted an intensive mark–recapture survey over 8 months to explore catch rate, density, movement and growth rates across this ‘low-catch’ zone and three comparable …

Widespread Exposure Of Marine Parks, Whales, And Whale Sharks To Shipping, Vincent Raoult, Vanessa Pirotta, Troy F. Gaston, Brad Norman, Samanatha Reynolds, Tim M. Smith, Mike Double, Jason How, Matt W. Hayward

Fisheries Research Articles

Context: Shipping impacts are a major environmental concern that can affect the behaviour and health of marine mammals and fishes. The potential impacts of shipping within marine parks is rarely considered during the planning process.

Aims: We assessed the areal disturbance footprint of shipping around Australia, its overlap with marine parks, and known locations of megafauna, so as to identify areas of concern that warrant further investigation.

Methods: Automatic Identification System (AIS) shipping data from 2018 to 2021 were interpreted through a kernel-density distribution and compared with satellite data from ∼200 individuals of megafauna amalgamated from 2003 to 2018, and …

Smart Drumlines Ineffective In Catching White Sharks In The High Energy Capes Region Of Western Australia: Acoustic Detections Confirm That Sharks Are Not Always Amenable To Capture, Stephen M. Taylor, Jason How, Michael J. Travers, Stephen J. Newman, Silas Mountford, Daniela Waltrick, Christopher E. Dowling, Ainslie M. Denham, Daniel J. Gaughan

Fisheries Research Articles

The management of human-shark interactions can benefit from the implementation of effective shark hazard mitigation measures. A Shark-Management-Alert-in-Real-Time (SMART) drumline trial in the Capes region of Western Australia was instigated after several serious incidents involving surfers and white sharks (Carcharodon carcharias). The project aimed to determine whether white sharks (target species), which were relocated after capture, remained offshore using satellite and acoustic tagging. Over a 27-month period, 352 fish were caught, 55% of which comprised tiger sharks (Galeocerdo cuvier). Ninety-one percent of animals were released alive in good condition. Only two white sharks were caught; both were relocated ≥ 1 …

Are Sharks Attracted To Caged Fish And Associated Infrastructure?, Charlie Huveneers, Yuri Niella, Michael Drew, Joshua Dennis, Thomas M. Clarke, Alison Wright, Simon Bryars, Matias Braccini, Chris Dowling, Stephen J. Newman, Paul Butcher, Scott Dalton

Fisheries Research Articles

Huveneers Charlie, Niella Yuri, Drew Michael, Dennis Joshua, Clarke Thomas M., Wright Alison, Bryars Simon, Braccini Matias, Dowling Chris, Newman Stephen J., Butcher Paul, Dalton Scott (2022) Are sharks attracted to caged fish and associated infrastructure?. Marine and Freshwater Research 73, 1404-1410.

https://doi.org/10.1071/MF22039

Using Dietary Additives To Improve Palatability Of Diets Containing Single‐Cell Protein From Methanotrophic Bacteria In Yellowtail Kingfish (Seriola Lalandi) Diets, Luke Pilmer, Lindsey Woolley, Alan J. Lymbery, Michael Salini, Gavin Partridge

Fisheries Research Articles

Single-cell protein (SCP) derived from methanotrophic bacteria has significant potential as a fishmeal alternative in aquafeeds. However, SCP has known palatability issues, to overcome these issues tuna hydrolysate and garlic powder were tested as palatability enhancers against basal diets without these additives. This study tested the inclusion of SCP at four dietary levels of 0%, 10%, 20% and 30%, representing 0%, 25%, 50% and 75% fishmeal replacement in juvenile yellowtail kingfish (Seriola lalandi) (YTK) diets. YTK were fed these diets in triplicate over 35 days. Compared with the control diet, fish fed the SCP10% diet ate less feed, …

Fisheries Genomics Of Snapper (Chrysophrys Auratus) Along The West Australian Coast, Andrea Bertram, David Fairclough, Jonathan Sandoval-Castillo, Chris Brauer, Anthony Fowler, Maren Wellenreuther, Luciano B. Beheregaray

Fisheries Research Articles

The efficacy of fisheries management strategies depends on stock assessment and management actions being carried out at appropriate spatial scales. This requires understanding of spatial and temporal population structure and connectivity, which is challenging in weakly structured and highly connected marine populations. We carried out a population genomics study of the heavily exploited snapper (Chrysophrys auratus) along ~2600 km of the Australian coastline, with a focus on Western Australia (WA). We used 10,903 filtered SNPs in 341 individuals from eight sampling locations to characterize population structure and connectivity in snapper across WA and to assess if current spatial …