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Biodiversity patterns of macrofauna associated with Halodule wrightii (Ascherson) in meadows of north-eastern Brazil Mar. Freshw. Res. (IF 1.8) Pub Date : 2024-03-14 Maria L. M. Vieira, João V. Nunes Souza, João L. L. Feitosa, José E. De Assis, José R. B. Souza
Context Seagrass meadows are highly productive habitats with a vast species diversity that perform multiple ecosystem services. The fauna associated with these environments is responsible for many of the ecosystem services. Therefore, the fauna composition and functional characteristics should be considered in studies addressing seagrass meadows. Aims This study aimed to evaluate the differences in
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Demographics and reproductive characteristics of threatened Malabar pufferfish (Carinotetraodon travancoricus) from Western Ghats hotspot, India Mar. Freshw. Res. (IF 1.8) Pub Date : 2024-03-12 Chelapurath Radhakrishnan Renjithkumar, Kuttanelloor Roshni
Context Carinotetraodon travancoricus is a threatened ornamental aquarium fish endemic to Western Ghats (WG) biodiversity hotspot of India and indiscriminate collection of this species resulted in a severe population decline. Aims To understand the impacts of wild collection of C. travancoricus for aquarium-fish trade, information on their population status and reproductive characteristics is required
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Reproductive dynamics of striped marlin (Kajikia audax) in the central North Pacific Mar. Freshw. Res. (IF 1.8) Pub Date : 2024-03-13 Robert L. Humphreys Jr, Jon K. T. Brodziak
Context Within the western and central North Pacific Ocean stock of striped marlin (Kajikia audax), reproductive information is lacking for the central North Pacific. Aims To derive estimates of sex-specific functional maturity ogives, eye-to-fork length at 50% maturity, reproductive phase composition, spawning season and sex ratios by sampling the Hawaii-based pelagic longline fishery. Methods Gonad
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Murray cod and modern fish screens: influence of water velocity and screen design on the entrainment and impingement of larval and young-of-year fish at water offtakes Mar. Freshw. Res. (IF 1.8) Pub Date : 2024-03-08 Jerom R. Stocks, Chris T. Walsh, Thomas S. Rayner, Craig A. Boys
Context Entrainment and removal of fish from aquatic ecosystems can occur at water pump offtakes. Exclusion screens that reduce these impacts are recognised as an important conservation measure. Aims Evaluate the effectiveness of the Australian screen design guidelines in protecting larvae and young-of-year age class of a native fish species, Murray cod Maccullochella peelii. Methods Entrainment and
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Detection of RNA presence of different coronaviruses in aquatic environmental samples Mar. Freshw. Res. (IF 1.8) Pub Date : 2024-03-08 Andrey Bogoyavlenskiy, Elmira Anarkulova, Makhabbat Amanbayeva, Madina Alexyuk, Pavel Alexyuk, Vladimir Berezin
Context The emergence of new methods for the analysis of environmental samples, such as massive parallel sequencing, creates a unique opportunity for studying the spread of viral nucleic acids in the environment. Aims The purpose of the article was to evaluate the diversity of ribonucleic acid (RNA) sequences of coronaviruses in the sample of water collected in the Small Aral Sea. Methods Nucleic acid
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The risky nightlife of undersized sea urchins Mar. Freshw. Res. (IF 1.8) Pub Date : 2024-02-20 Jennifer E. Smith, Emma Flukes, John P. Keane
Context Longspined sea urchins (Centrostephanus rodgersii) form extensive urchin barrens in south-eastern Australia, threatening biodiversity and lucrative fishery stocks. Although large urchins are readily visible on reefs, small or ‘undersized’ urchins have often been considered non-emergent, cryptic, and largely inaccessible to predators, meaning smaller predators are considered not to contribute
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Flexibility in reproductive attributes may facilitate the invasive capacity of the Mediterranean fanworm, Sabella spallanzanii (Gmelin) Mar. Freshw. Res. (IF 1.8) Pub Date : 2024-02-15 Sarah C. Brand, Andrew G. Jeffs
Context The Mediterranean fanworm arrived as a non-indigenous species in parts of Australasia, where it has established and then rapidly spread from the initial points of arrival, despite marked differences in environmental conditions compared from its natal habitat in the Mediterranean Sea. Aims To better understand the invasive capacity of this species in New Zealand. Methods Maturation, reproductive
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Age, growth and maturity of an endemic valuable resource, the Rio skate (Rioraja agassizii (Chondrichthyes: Rajiformes)), off Uruguay and northern Argentina Mar. Freshw. Res. (IF 1.8) Pub Date : 2024-02-05 Santiago J. Bianchi, Jorge M. Roman, Luis O. Lucifora, Santiago A. Barbini
Context Rioraja agassizii is a vulnerable species endemic to the Southwest Atlantic. It is caught by trawl fisheries throughout its range. Aims To determine the age, estimate growth parameters, and age and size at maturity. Methods Ages were determined using vertebrae readings. To fit growth models, a Bayesian framework was employed with the von Bertalanffy, Gompertz and Logistic candidate models.
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The utility of otolith weight in growth studies of young-of-year bony bream (Nematalosa erebi), Australia’s most widespread freshwater fish Mar. Freshw. Res. (IF 1.8) Pub Date : 2024-02-05 Oliver P. Pratt, Leah S. Beesley, Bradley J. Pusey, Daniel C. Gwinn, Chris S. Keogh, Samantha A. Setterfield, Michael M. Douglas
Otoliths are calcified structures in the inner ear of fish, the analysis of which can be used to derive important life-history characteristics. Otoliths can be used to age young fish by counting daily growth increments visible in the otolith cross-section; however, this is costly and time-consuming. Otolith weight is a potential surrogate for fish age in growth analysis, providing a rapid alternative
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Impacts of necrotising disease on the Endangered cauliflower soft coral (Dendronephthya australis) Mar. Freshw. Res. (IF 1.8) Pub Date : 2024-02-05 Rosemary Kate Steinberg, John Turnbull, Tracy D. Ainsworth, Katherine A. Dafforn, Alistair G. B. Poore, Emma L. Johnston
Context Diseases have affected coral populations worldwide, leading to population declines and requiring active restoration efforts. Aims Describe population and individual impacts of necrotising disease in the Endangered octocoral Dendronephthya australis. Methods We quantified population loss and recruitment by using reference photos, survey and GPS mapping and described disease lesions by using
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Rubber ramp and spat rope did not facilitate upstream passage of a galaxiid through a perched culvert Mar. Freshw. Res. (IF 1.8) Pub Date : 2024-01-31 C. F. Baker, P. Williams, N. Pyper, P. A. Franklin
Poorly installed or undersized culverts at road crossings are one of the most frequently encountered barriers to fish movements, especially for small-bodied fish species. Although replacement with more ‘fish friendly’ culvert designs is the preferred solution, at many sites remediation will be required in the short to medium term. Consequently, there is a need for effective evidence-based fish passage
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Fluorescence in the estimation of chlorophyll-a in public water reservoirs in the Brazilian cerrado Mar. Freshw. Res. (IF 1.8) Pub Date : 2024-01-31 Lucélia Souza de Barros, Tati de Almeida, Raquel Moraes Soares, Bruno Dias Batista, Henrique Dantas Borges, Rejane Ennes Cicerelli
Context The usual strategy for monitoring of eutrophication process is the use of traditional limnological methods, based on laboratory analysis. These procedures involve costly and time-consuming analyses, usually with in vitro methodologies, which can still have limitations in terms of sensitivity and reliability, if poorly managed. Phytoplankton pigments, such as chlorophyll-a (Chl-a), are highly
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Fuzzy comprehensive evaluation of seawater quality of Larimichthys Crocea mariculture areas in Zhoushan, China Mar. Freshw. Res. (IF 1.8) Pub Date : 2024-02-01 Jianwei Yu, Shun Wu, Yu Zhang
Context Aquaculture is an essential industry and assessing its impact on the environment, particularly water quality, is crucial for sustainable practices. This study aimed to comprehensively evaluate the seawater quality in the Dongji Island yellow croaker (Larimichthys crocea) aquaculture area by using the fuzzy comprehensive evaluation method and field survey. Aims The main objective of this study
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Early warning and monitoring of the safety risk of coastal nuclear power plant cold source under the stress from Phaeocystis globosa blooms Mar. Freshw. Res. (IF 1.8) Pub Date : 2024-01-29 Jialin Ni, Hongyi Chen, Li Dai, Jianda Ji, Jing Lin, Tao Yu
Context In recent years, Phaeocystis globosa has become a typical red tide species in the Beibu Gulf, posing a safety hazard to the cold-water intake system of the Guangxi Fangchenggang Nuclear Power Plant. Aims To establish an effective early risk-warning monitoring and ensure the safety of nuclear power plant cold-water intakes. Methods In this study, a multifactor and multilevel early risk-warning
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Managing flows for frogs: wetland inundation extent and duration promote wetland-dependent amphibian breeding success Mar. Freshw. Res. (IF 1.8) Pub Date : 2024-01-24 J. F. Ocock, A. Walcott, J. Spencer, S. Karunaratne, R. F. Thomas, J. T. Heath, D. Preston
Context River regulation is a key threat to amphibian communities that continue to face global declines. Prior work in regulated river catchments has indicated that wetland inundation from connecting river flows supports breeding in some frog species more than others. Aims Our aim was to identify flow metrics influencing breeding and recruitment success in flow-dependent frogs, to derive flow–ecology
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Long-distance dispersal of the endangered Pacific nurse shark (Ginglymostoma unami, Orectolobiformes) in Costa Rica revealed through acoustic telemetry Mar. Freshw. Res. (IF 1.8) Pub Date : 2024-01-24 Sergio Madrigal-Mora, Elpis J. Chávez, Randall Arauz, Christopher G. Lowe, Mario Espinoza
Long-distance movements associated with environmental and ecological drivers are common in a wide array of mobile marine species. Understanding such movements and associated drivers is particularly important for management and conservation of threatened species, which may be exposed to anthropogenic threats throughout their range. Pacific nurse sharks (Ginglymostoma unami) are endangered because of
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Impacts of VIE tagging and Rhodamine B immersion staining on two measures of performance for a small-bodied fish Mar. Freshw. Res. (IF 1.8) Pub Date : 2024-01-17 P. A. Franklin, R. Crawford, W. B. van Ravenhorst, C. F. Baker
Context Passage efficiency is an important metric for quantifying the success of fish-passage remediation. Mark–recapture methods are typically employed to estimate fish-passage efficiency. Although biotelemetry methods have become a benchmark standard for such studies, they remain unfeasible for many small-bodies species because of the excessive size of electronic tags. Aims This study compares two
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The suitability of a dynamic coastal lake to support the diadromous fish Galaxias maculatus Mar. Freshw. Res. (IF 1.8) Pub Date : 2024-01-09 Christopher G. Meijer, Michael J. H. Hickford, Duncan P. Gray, David R. Schiel
Context Globally, intermittently closed and open lakes and lagoons (ICOLLs) can constitute highly productive coastal environments that support a range of fisheries. With growing pressures on fish communities, understanding the role of ICOLL management in population dynamics is increasingly important for conservation. Aims To determine whether the flood-driven management and environmental degradation
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Salinity as a major influence on groundwater microbial communities in agricultural landscapes Mar. Freshw. Res. (IF 1.8) Pub Date : 2024-01-08 Tess Nelson, Grant C. Hose, Jodie Dabovic, Kathryn L. Korbel
Context Understanding the impacts of salinity on groundwater microbial communities is imperative, because these communities influence groundwater chemistry, quality, and its suitability for use by humans and the environment. Aim To assess groundwater salinisation and its influence on groundwater microbial communities within the Murray–Darling Basin (MDB), Australia. Methods Alluvial aquifers were sampled
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Ineffective artificial mouth-breaching practices and altered hydrology confound eutrophic symptoms in a temporarily closed estuary Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-12-14 Marelé Nel, Janine B. Adams, Lucienne R. D. Human, Monique Nunes, Lara Van Niekerk, Daniel A. Lemley
Context Artificial breaching of intermittently closed estuaries has become more frequent in the face of global-change pressures. Aims This study aimed to determine whether the ecological health of the Great Brak Estuary has been affected by the prolonged loss of marine connectivity arising from below-average inflow and failed breaching attempts. Methods We characterised primary eutrophic symptoms (inorganic
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Lobster predation on barren-forming sea urchins is more prevalent in habitats where small urchins are common: a multi-method diet analysis Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-12-07 Jennifer E. Smith, John Keane, Michael Oellermann, Craig Mundy, Caleb Gardner
Context In Tasmania, Australia, the government’s response to range-extending, barren-forming longspined sea urchin (Centrostephanus rodgersii) includes rebuilding of southern rock lobster (Jasus edwardsii) stocks to increase predation. But lobster preference for native species and continued barren expansion challenges the control efficacy. Aims To determine the impact of lobster predation on C. rodgersii
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Effects of mine tailings on aquatic macroinvertebrate structure within the first year after a major dam collapse Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-12-07 Juliana S. Leal, Bruno E. Soares, Joseph L. S. Ferro, Rafael Dellamare-Silva, Cláudia Teixeira, Virgílio José M. Ferreira Filho, Vinicius F. Farjalla
Context The collapse of a tailings dam in Brumadinho (Brazil) is considered one of the largest mining disasters worldwide. The mine tailings polluted the water and sediment of the Paraopeba River downstream of the collapsed dam. The effects of the tailings on biological communities remain unknown. Aims We evaluated the effects of the tailings dam collapse on aquatic macroinvertebrate assemblages in
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An integrated approach for assessing the survival of discarded sandbar sharks, Carcharhinus plumbeus, captured in scientific longlines Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-11-27 Taylor Grosse, Cynthia Awruch, Euan Harvey, Benjamin Saunders, Chris Dowling, Daniela Waltrick, Matias Braccini
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
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Taxonomic diversity of fishes from two coral-reef waters of the South China Sea Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-11-21 Yuanjie Li, Jun Zhang, Zuozhi Chen, Xuejiao Dai, Pengli Xiong, Wenming Yu
Context Conservation of coral-reef fishes requires an understanding of their spatial and temporal responses to climate change and anthropogenic disturbance, which also requires an understanding of patterns in their taxonomic diversity. Aims To describe the species composition, taxonomic diversity and G-F diversity-measurement index of Qilianyu Island and Meiji Reef, South China Sea, coral-reef fish
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Influence of hydroperiod on aquatic food-web structure and energy production in a floodplain wetland: implications for environmental flow management Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-11-20 Lindsey K. Frost, Sarah J. Mika, Ross M. Thompson, Ivor Growns
Context Environmental water is often used to manage floodplain wetlands that support many taxa, both terrestrial and aquatic. It is important to optimise the managed hydroperiod to maximise the provision of aquatically derived resources from wetlands. Aims To test the hypothesis that increasing hydroperiod affects food-web structure and energy production in floodplain wetlands. Methods Fatty acids
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Pump my wetland: potential benefits of using water pumps fitted with large-mesh screens to conserve anurans in regulated floodplain environments Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-11-20 Damian R. Michael, Gilad Bino, Anthony Conallin, James Maguire, Skye Wassens
Context Water pumps fitted with filtering screens are effective for delivering water to floodplain environments and excluding large-bodied exotic fish; yet, the benefits to wetland fish and anurans are unknown. Aims To quantify fish and tadpole responses to refilling wetlands with water pumps fitted with large-mesh screens following drawdown v. overland reconnections in the mid-Murrumbidgee region
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Effects of acclimation temperature and exposure time on the scope for growth of the blackfoot Pāua (Haliotis iris) Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-11-13 Thuy T. Nguyen, Islay D. Marsden, William Davison, John Pirker
Context Climate change and increased seawater temperatures can greatly affect physiological processes and growth of marine ectotherms, including the blackfoot haliotid, Pāua (Haliotis iris). Scope for growth (SFG) is a laboratory-derived measure of the energy available for growth but this has not been examined in Pāua. Aims To measure SFG of seasonally collected Pāua and their haemolymph parameters
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Managing biological, economic and social trade-offs in the Australian Southern and Eastern Scalefish and Shark Fishery Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-11-08 Florence Briton, Olivier Thébaud, Claire Macher, Caleb Gardner, Lorne Richard Little
Context Maximum sustainable yield and maximum economic yield are often advocated as desirable biological and economic objectives for fisheries management, and the analysis of trade-offs associated is often absent from scientific advice. Aims This work aims to demonstrate an operational approach for comparing trade-offs of not only biological, and economic objectives, but also social objectives, in
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Search for the vulnerable giants: the presence of giant guitarfish and wedgefish in the Karimunjawa National Park and adjacent waters Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-11-01 Faqih Akbar Alghozali, Muhammad Wiralaga Dwi Gustianto, Ashma Hanifah, Maula Nadia, Widyastuti, Nauvan Prabhu, Lufni Fauzil Adhim, Khansa Alifa Nurhaliza, Hollie Booth, Muhammad Ichsan, Andhika Prasetyo, Nesha Ichida
Context Giant guitarfish (Family: Glaucostegidae) and wedgefish (Family: Rhinidae) (Critically Endangered, IUCN Red List and CITES Appendix II) are highly exploited throughout their distribution because of their highly valued fins in the international market. Both are commonly caught as bycatch or secondary valuable catch in the Java Sea, including in Karimunjawa National Park, Central Java, Indonesia
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Ontogenetic habitat partitioning among four shark species within a nursery ground Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-10-31 Daniel P. Crear, Cassidy D. Peterson, Jeremy M. Higgs, Jill M. Hendon, Eric R. Hoffmayer
Context Nursery areas provide refuge from predators, rich foraging grounds, and physical conditions conducive to growth and development of juvenile inhabitants. Specifically, the Mississippi Sound in the northern Gulf of Mexico is likely a nursery ground for multiple large and small coastal sharks. Aims and methods Using over a decade of shark survey catch data, we employed habitat modelling approaches
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Sewage-derived nitrogen dispersal and N-fixation in Port Phillip Bay in south-eastern Australia Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-10-18 Gregory D. Parry, Kerry P. Black
Context Extreme values of nitrogen isotope ratios (δ15N) in biota identify areas influenced by sewage discharges and nitrogen fixation. Aims To measure the ecological footprint of the Western (sewage) Treatment Plant (WTP) by using δ15N measurements and an NPZ model, and to identify regions where nitrogen is fixed in Port Phillip Bay, in south-eastern Australia. Methods δ15N was measured in situ for
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Quantifying the accessibility of sustainable seafood in south-eastern Queensland, Australia Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-10-04 Tia Vella, Leslie Roberson, Caitie Kuempel, Carissa Klein
Context Seafood is a nutritious source of protein. However, seafood production can have perverse environmental impacts. Seafood sustainability differs depending on species, origin, and production or fishing method. Australian consumers seeking sustainable seafood rely on independent sustainability guides and detailed labels at point of sale. Aims We aimed to determine consumer accessibility to sustainable
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Molecular ecology of the Javanese ricefish, Oryzias javanicus (Bleeker): genetic divergence along the Indonesian Archipelago Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-09-22 Eko Hardianto, Mio Hirayama, Diah Permata Wijayanti, Hideyuki Imai
Context Investigating the patterns of genetic diversity and population structure of the Javanese ricefish, Oryzias javanicus, is instrumental in identifying their dispersal patterns and demographics in response to ecological changes and biogeographical barriers. Aims To acquire a better understanding of the evolutionary history of Javanese ricefish. Methods We sequenced part of the mitochondrial DNA
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On the chemistry of small waterbodies linked to marine aerosols and local geology on the Windmill Islands and mainland near Casey Station, Antarctica Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-09-18 Patrick De Deckker, Allan R. Chivas, Elmer Kiss, Nicole Mikkelson
Context: In total, 43 shallow waterbodies were sampled in 1983 in the vicinity of Casey Station and nearby islands in Antarctica. The following physico-chemical parameters were obtained: water and air temperature, pH, conductivity, dissolved oxygen, plus major and minor elements. Aims: To identify the physico-chemical characteristics of these waters and determine their origin, and calculate their mineral
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Effects of spatial–temporal conditions and fishing-vessel capacity on the capture of swimming crabs by using different fishing gear around the waters of Taiwan Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-09-15 Muhamad Naimullah, Kuo-Wei Lan, Cheng-Hsin Liao, Yu-Jhen Yang, Chao-Ching Chen, Hon Jung Liew, Mhd Ikhwanuddin
Context: Swimming crab is a vital fishery resource and a valuable source of income in the southern East China Sea, but it lacks management strategies, especially when using different fishing gear. Aims: This study aimed to determine the effects of spatial–temporal conditions and vessel capacity on swimming crabs by using different fishing-gear types in the Taiwan Strait (TS). Methods: We used generalised
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The lesser of two evils: the role of an instream barrier to control the distribution and invasive potential of non-native fish species in the Mooi River, South Africa Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-08-30 Matthew J. Burnett, Céline Hanzen, Alex Whitehead, Gordon C. O’Brien, Colleen T. Downs
Context: Recreational angling has a history of species introductions causing significant loss of native biodiversity. Despite this, it represents a large economy supporting many livelihoods. The Mooi River, South Africa, supports trout fisheries in its upper reach. A weir was constructed to mitigate the loss of a natural barrier, now inundated by a large impoundment. Aims: We evaluated the Inchbrakie
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A comparison of growth of a vulnerable species, common carp, Cyprinus carpio (Actinopteri: Cyprinidae), from two different reservoir types in the same river basin Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-08-31 Hakki Dereli, Bahar Bayhan
Context: The mechanisms underlying regional differences in growth parameters of common carp, Cyprinus carpio Linnaeus, 1758 (Actinopteri: Cyprinidae), are not yet fully understood, because comparisons among them have been made post hoc. Aims: To simultaneously compare growth of common carp between sexes and between regions: Demirköprü Reservoir (DR) and Marmara Lake (ML), which have different structures
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Tidal migrations of juvenile Sillago spp. in a subtropical intertidal nursery seascape Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-08-29 Max L. Giaroli, Craig A. Chargulaf, Ben L. Gilby, Ian R. Tibbetts
Context: Subtropical intertidal pools on depositional shores are important nursery habitats for smaller juveniles (10 to ~25-mm total length, TL) of commercially important smelt whiting (Sillago spp.), whereas larger juveniles >25 mm TL occupy shallow subtidal habitats at low tide. Aims: We investigated the connectivity between lower and upper shore habitats in Moreton Bay. Methods: We used funnel
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Benthic communities of the lower mesophotic zone on One Tree shelf edge, southern Great Barrier Reef, Australia Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-08-24 Raven M. Wright, Robin J. Beaman, James Daniell, Tom C. L. Bridge, Jodie Pall, Jody M. Webster
Context: Increasing interest in mesophotic coral ecosystems has shown that reefs in deep water show considerable geomorphic and ecological variability among geographic regions. Aims: We provide the first investigation of mesophotic reefs at the southern extremity of the Great Barrier Reef (GBR) to understand the biotic gradients and habitat niches in the lower mesophotic zone. Methods: Multibeam data
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Slow recovery of stream invertebrates on subantarctic Macquarie Island after eradication of introduced rabbits and regrowth of vegetation Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-08-22 R. Marchant, B. J. Kefford, M. Houghton, J. Wasley, C. K. King
Context: Streams on subantarctic Macquarie Island were first sampled for freshwater invertebrates in 1992 when rabbit numbers were low. Then an average 11.6 taxa per site were recorded. Between 2000 and 2011, vegetation was overgrazed as rabbit numbers increased. In 2008 and 2010, 7.4–8.4 taxa per site were recorded, abundance of most taxa had decreased and greatest compositional changes occurred at
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Disturbed by pH? Nacre tablet thickness of freshwater pearl mussels (Margaritifera margaritifera) is a poor temperature proxy Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-08-07 Christoph J. Gey, Frankie Thielen, Laurent Pfister, Christophe Hissler, Guilhem Türk, Sven Baier, Bernd R. Schöne
Context: The ultrastructure of marine bivalve shells, specifically the thickness of nacre tablets has recently been identified to be related to water temperature. Aims: This study investigates whether the nacre tablet thickness (NTT) of freshwater pearl mussel shells can serve as a proxy for stream water temperature. Methods: Laboratory-grown juvenile and adult Margaritifera margaritifera from three
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Toxicity of trimethoprim towards marine microalgae: implication for environmental risk assessment Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-08-08 Weiyan Duan, Bo Su, Pengfei Feng, Chan Zhang, Liqin Du, Jiangyue Wu
Context: Trimethoprim (TMP) is a common antibacterial medication used in human and veterinary medicine, including in aquaculture. Antibiotic misuse and abuse results in the antibiotic pollution of water and has attracted increasing attention. Antibiotics are frequently detected in water bodies and pose a certain environmental risk to the aquatic system. Aims: Two marine diatoms, i.e. Phaeodactylum
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Cold-water pollution impacts on two ‘warm-water’ riverine fish: interactions of dam size and life-history requirements Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-08-09 John D. Koehn, Charles R. Todd, Henry Wootton
Context: Temperature regulates most ecological processes in freshwater ecosystems. Anthropogenic changes to natural thermal regimes, especially cold water released from stratified impoundments (cold-water pollution, CWP), is a widespread and major threat to fish populations globally. Aims: Because mitigation options for CWP are often expensive, we aimed to provide robust ecological evidence to inform
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Interannual variation in a freshwater recreational fishery under the influence of drought, bushfires, floods and a global pandemic Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-08-03 Faith A. Ochwada-Doyle, Nathan Miles, Julian M. Hughes, Jeffrey J. Murphy, Kate E. Stark, Michael B. Lowry, Laurie D. West, Matthew D. Taylor
Context: As social–ecological systems, recreational fisheries often vary temporally in response to environmental changes affecting ecological processes and human behaviour. Monitoring such variability in this ecosystem service can guide adaptive management measures for sustainability. Aims: This novel research for Australian, sought to quantify interannual changes in the freshwater recreational fisheries
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Multi-gene insights into the taxonomy and conservation of Tasmania’s galaxiid fishes Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-07-28 Mark Adams, Michael P. Hammer, Peter J. Unmack, Tarmo A. Raadik, Charlotte Jense, Christopher P. Burridge
Context: Galaxiids are a widespread, southern hemisphere, radiation of mostly obligate freshwater fishes. Tasmania houses a diversity of endemic species of Galaxias and Paragalaxias. Of these, many are at risk of extinction, being landlocked, range-restricted and subject to anthropogenic threats, placing a high-conservation priority on the region. Aim: Our aim was to synthesise historic and published
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Characterisation of nematode larvae found in a vulnerable native Australian fish, the southern pygmy perch, Nannoperca australis Günther Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-07-27 Shokoofeh Shamsi, Luke Pearce, Xiaocheng Zhu
Context: The southern pygmy perch (Nannoperca australis) is an endemic freshwater fish in Australia that is facing population decline and is listed as endangered or vulnerable in several states. Aims: The aim of this study was to investigate the presence of parasites in the southern pygmy perch population and provide insights into their effect on the health and conservation of the species. Methods:
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A deep dive into the ecology of Gamay (Botany Bay, Australia): current knowledge and future priorities for this highly modified coastal waterway Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-07-19 T. P. Stelling-Wood, P. E. Gribben, G. Birch, M. J. Bishop, C. Blount, D. J. Booth, C. Brown, E. Bruce, A. B. Bugnot, M. Byrne, R. G. Creese, K. A. Dafforn, J. Dahlenburg, M. A. Doblin, T. E. Fellowes, A. M. Fowler, M. C. Gibbs, W. Glamore, T. M. Glasby, A. C. Hay, B. Kelaher, N. A. Knott, A. W. D. Larkum, L. M. Parker, E. M. Marzinelli, M. Mayer-Pinto, B. Morgan, S. A. Murray, M. J. Rees, P. M. Ross
Context: Gamay is a coastal waterway of immense social, cultural and ecological value. Since European settlement, it has become a hub for industrialisation and human modification. There is growing desire for ecosystem-level management of urban waterways, but such efforts are often challenged by a lack of integrated knowledge. Aim and methods: We systematically reviewed published literature and traditional
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Temporal functional changes in coral and fish communities on subtropical coastal coral reefs Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-07-18 Charlotte G. Clay, James Davis Reimer, Katie M. Cook, Hirotaka Yamagawa, Ellen Gravener, Lee Hui Yian Theodora, Maria Beger
Context: Global and local stressors can drive phase shifts from zooxanthellate scleractinian coral communities to macroalgae-dominated ecosystems. However, our understanding of altered ecosystem functioning, productivity and stability remains limited as pre-shift data are typically lacking for degraded coral-reef sites. Aims: Here, we assessed functional changes in fish communities in Nakagusuku Bay
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Conditioning to predators improves survival of stocked Murray cod (Maccullochella peelii) fingerlings Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-07-14 Michael Hutchison, Adam Butcher, Andrew Norris
Context: Following recent major fish kill events, there is increasing interest in stocking Murray cod fingerlings to help fish stocks recover. Strategies that can increase post-release survival of stocked fingerlings are important for conservation stocking of Murray cod and may also have application to other species. Aims: The aim of this work was to evaluate whether pre-release predator recognition
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An archaeological example of Aboriginal management of a hydro-ecological system in the Murray River valley, South Australia Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-07-10
Context: A rare archaeological example of Aboriginal water management in a Murray River floodplain upstream of Renmark is described and contextualised. Aims: Historical accounts, archaeological descriptions and hydrological modelling are used to propose a likely function of the site. Methods: The site was documented through archaeological field recording, a digital elevation model (DEM) developed through
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Phylogenetic and phylogeographic insights on Trans-Andean spectacled caiman populations in Colombia Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-06-30 Gonzalo Jiménez-Alonso, Sergio A. Balaguera-Reina, Manuel Hoyos, Carolina Ibáñez, Sandra Marcela Hernández Rangel, Carlos Miguel del Valle Useche, Juan Felipe Moncada, Paul Bloor
Context: Spectacled caiman (Caiman crocodilus) is a species complex with at least eight phylogenetic lineages distributed across Central and South America. However, several populations remain unstudied, which limits a clear understanding of the relationship among lineages as well as whether all hidden diversity has been unveiled. Aim: We analysed the molecular variation of spectacled caiman populations
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Accuracy and precision of sea-finding orientation as a function of dune proximity in hatchlings of two species of sea turtles Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-06-26 Shigetomo Hirama, Blair Witherington, Sarah Hirsch, Andrea Sylvia, Raymond Carthy
Context: Sea turtle hatchlings generally emerge at night from nests on sand beaches and immediately orient using visual cues, which are believed to entail the difference in brightness between the light seen in the seaward direction and that seen in the duneward direction. Aim: The aim of this study was to understand how dune proximity affected hatchling orientations in two sea turtle species that share
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Sedimentation from landscape clearance-induced soil erosion threatens waterhole persistence in a semi-arid river system, southern Queensland, Australia Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-06-26 John Tibby, Jonathan C. Marshall, Jaye S. Lobegeiger, Kathryn J. Amos, Giselle Pickering, Theresa Myburgh
Context: In arid and semi-arid river systems, waterholes are often the only refugia for aquatic organisms during no-flow spells. Sediment accumulation in waterholes reduces their persistence. Aims: To assess this threat, we surveyed the depth of, and dated, waterhole sediments from the Moonie River, a northern tributary of Australia’s largest river system, the Murray–Darling Basin. Methods: Fine-sediment
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Evidence of multiple stocks of catfish, Rita rita (Hamilton), from the Ganges Basin on the basis of an integrated analysis of truss morphometrics, otolith microchemistry, and otolith shape Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-06-16 Ankita, Hayden T. Schilling, Salman Khan, M. Afzal Khan, Kaish Miyan
Context: Management of Rita rita (Hamilton) in India is hampered by a lack of understanding of possible stock structure. Aim: To investigate possible spatial stock structure of Rita rita in the Ganges Basin. Methods: Independent analyses of landmark-based truss morphometry, otolith elemental analysis and otolith shape were conducted to investigate the stock structure of the catfish (Rita rita) from
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Species-specific trophic enrichment factor of stable nitrogen and carbon isotopes in fish otolith organic matter Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-06-14 Ming-Tsung Chung, Yu-Yang Peng, Aafaq Nazir, Yu-Chun Wang, Pei-Lin Wang, Jen-Chieh Shiao
Context: Although stable carbon (δ13C) and nitrogen (δ15N) isotopes are widely used to study feeding ecology, the use of these isotopes in otolith organic matter to assess the diet of fishes is rarely investigated. Aim: This study evaluated the relationship of δ13C and δ15N values among muscle, otolith organic matter and diet. The samples were analysed using an elemental analyzer connected to isotope-ratio
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Investigating microplastic contamination and biomagnification in a remote area of South Australia Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-06-08 Solomon O. Ogunola, Patrick Reis-Santos, Nina Wootton, Bronwyn M. Gillanders
Context: Microplastics are widespread in aquatic ecosystems and are commonly recorded in water, sediment and a broad spectrum of marine biota. Yet, the extent to which organisms ingest microplastics directly or indirectly by trophic transfer is largely unknown. Aims: This study characterises microplastic abundance across intertidal water, sediment, and marine biota species of different trophic levels
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Piloting the rapid R-MEET framework at a coastal Ramsar Site Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-06-09 S. M. Munguía, J. T. Heinen
Context: The Ramsar Convention on Wetlands is critical to conserving wetlands. However, it has received much criticism, particularly about the inadequacy of reporting by Contracting Parties. Aim: We previously developed a rapid assessment tool called the Rapid Ramsar Management Effectiveness Evaluation Tool (Rapid R-MEET) to alleviate the reporting burden and emphasise the Convention’s priorities.
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Multi-decadal trends in large-bodied fish populations in the New South Wales Murray–Darling Basin, Australia Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-06-05 D. A. Crook, H. T. Schilling, D. M. Gilligan, M. Asmus, C. A. Boys, G. L. Butler, L. M. Cameron, D. Hohnberg, L. E. Michie, N. G. Miles, T. S. Rayner, W. A. Robinson, M. L. Rourke, J. R. Stocks, J. D. Thiem, A. Townsend, D. E. van der Meulen, I. Wooden, K. J. M. Cheshire
Context: Native fish populations in Australia’s Murray–Darling Basin (MDB) have experienced severe declines since European settlement. Information on their status is needed to guide management and recovery. Aims: To quantify trends in MDB fish populations in New South Wales (NSW) from 1994 to 2022. Methods: Relative abundance, biomass, and size structure were examined using generalised additive mixed
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Laboratory reproduction of grey triggerfish (Balistes capriscus) Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-05-17 Leonardo Demier Cardoso, André Batista de Souza, Douglas da Cruz Mattos, Marcelo Fanttini Polese, Lucas Areias Bassul, Paulo Henrique Rocha Aride, Marlon Carlos França, Henrique David Lavander
Context: Balistes capriscus is relevant for fishing worldwide, but there is no consistent information on the maintenance of the species in a captive environment. Aims: Develop protocols for the reproduction of the species in aquaculture systems, contributing to the maintenance of the supply in the commerce through captive breeding. Methods: A Balistes capriscus couple was selected on the basis of behavioural
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Diet of the finescale triggerfish, Balistes polylepis (Steindachner), in the Gulf of California Mar. Freshw. Res. (IF 1.8) Pub Date : 2023-05-15 Tatiana A. Acosta-Pachón, Juan Manuel López-Vivas, Alejandra Mazariegos-Villarreal, Karla León-Cisneros, Marco A. Medina-López, Emelio Barjau González, Elisa Serviere-Zaragoza
Context: Establishing the roles that different species play within ecosystems is key to understanding how ecosystems function and determining the feeding relationships among species. Aims: This study analysed the stomach contents of finescale triggerfish, Balistes polylepis, at two sites in the southern Gulf of California, in order to describe its diet. Methods: The prey-specific index of relative