Marine and Freshwater Research最新文献

{"title":"Taxonomic diversity of fishes from two coral-reef waters of the South China Sea","authors":"Yuanjie Li, Jun Zhang, Zuozhi Chen, Xuejiao Dai, Pengli Xiong, Wenming Yu","doi":"10.1071/mf22093","DOIUrl":"https://doi.org/10.1071/mf22093","url":null,"abstract":"<strong> Context</strong><p>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.</p><strong> Aims</strong><p>To describe the species composition, taxonomic diversity and <i>G-F</i> diversity-measurement index of Qilianyu Island and Meiji Reef, South China Sea, coral-reef fish assemblages.</p><strong> Methods</strong><p>Coral reef-dwelling fish were sampled in 2018 and 2019 at Meiji Reef and Qilianyu Island by using various fishing gears, identified to the lowest taxonomic category, and their taxonomic relatedness was compared at levels of class, order, family, genus and species.</p><strong> Key results</strong><p>The reef-dwelling fish fauna of this region comprises 123 species in 5 orders (dominated by Perciformes, at 78%), 22 families and 46 genera. The average taxonomic distinctness (Δ⁺) of Qilianyu Island fish assemblages is 55.52, and variation in taxonomic distinctness (Λ⁺) is 138.18; for Meiji Reef, values for Δ⁺ and Λ⁺ are 53.02 and 135.33 respectively.</p><strong> Conclusions</strong><p>High species diversity and low taxonomic diversity are important features of coral-reef fish assemblages in the South China Sea.</p><strong> Implications</strong><p>The high species diversity of reef fish in the South China Sea, along with a well-distributed assemblage of families and genera, is crucial for preserving the region’s fish biodiversity. Consequently, timely prioritisation of reef fish conservation is essential.</p>","PeriodicalId":18209,"journal":{"name":"Marine and Freshwater Research","volume":"27 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138542596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pump my wetland: potential benefits of using water pumps fitted with large-mesh screens to conserve anurans in regulated floodplain environments","authors":"Damian R. Michael, Gilad Bino, Anthony Conallin, James Maguire, Skye Wassens","doi":"10.1071/mf23158","DOIUrl":"https://doi.org/10.1071/mf23158","url":null,"abstract":"<strong> Context</strong><p>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.</p><strong> Aims</strong><p>To quantify fish and tadpole responses to refilling wetlands with water pumps fitted with large-mesh screens following drawdown <i>v</i>. overland reconnections in the mid-Murrumbidgee region of New South Wales.</p><strong> Methods</strong><p>Frog and fish communities were compared between wetlands under managed inundation and overland reconnections by using PERMANOVA, and non-metric multidimensional scaling was used to evaluate community divergence between watering strategies. Classification and regression trees were used to identify thresholds in explanatory variables and predicted threshold responses in fish and tadpole abundance.</p><strong> Key results</strong><p>Fish and tadpole communities differed in relation to watering strategies. Managed inundation resulted in a higher abundance of tadpole species and one native fish, whereas overland reconnections resulted in a high abundance of exotic fish species and fewer tadpoles. Water depth was a driver of tadpole abundance in two species, including the threatened southern bell frog (<i>Litoria raniformis</i>).</p><strong> Conclusions and implications</strong><p>Using filtered pumps with large-mesh screens to deliver water to wetlands of high conservation value may be an effective strategy for reducing large-bodied exotic fish and enhancing frog and fish populations in regulated floodplain systems.</p>","PeriodicalId":18209,"journal":{"name":"Marine and Freshwater Research","volume":"44 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138516562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of hydroperiod on aquatic food-web structure and energy production in a floodplain wetland: implications for environmental flow management","authors":"Lindsey K. Frost, Sarah J. Mika, Ross M. Thompson, Ivor Growns","doi":"10.1071/mf23163","DOIUrl":"https://doi.org/10.1071/mf23163","url":null,"abstract":"<strong> Context</strong><p>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.</p><strong> Aims</strong><p>To test the hypothesis that increasing hydroperiod affects food-web structure and energy production in floodplain wetlands.</p><strong> Methods</strong><p>Fatty acids and stable isotopes of δ¹³C and δ¹⁵N were used to define food-web structure, and estimate total energy production throughout a managed inundation event in a wetland in the northern Murray–Darling Basin.</p><strong> Key results</strong><p>Food-web complexity increased with an increasing hydroperiod in line with predictable patterns of community assemblage development, before reducing sharply immediately prior to drying. Energy availability increased with an increasing hydroperiod and there was a strong correlation (<i>ρ</i> = 0.669, <i>P</i> = 0.0001) between energy availability and fatty acid concentration, which was in turn related to patterns of taxon occurrence.</p><strong> Conclusions and implications</strong><p>Hydroperiod exerts a strong influence on aquatic invertebrate community trophic dynamics and energy provision. Planned flows should support maturation and stabilisation of the invertebrate community to optimise energy provision to consumers.</p>","PeriodicalId":18209,"journal":{"name":"Marine and Freshwater Research","volume":"95 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138516563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical modelling for ecologically successful spawning-site restoration in Chin-sha River, China","authors":"Yuqian Xi, Pengcheng Li, Xiaolan Pang, Yu Han, Junqiang Lin, Qianqian Wang, Yike Li, Weiwei Yao","doi":"10.1071/mf23100","DOIUrl":"https://doi.org/10.1071/mf23100","url":null,"abstract":"Context The construction of dams on the Chin-sha River will affect fish spawning sites, leading to a decline in fish species. Aims This paper presents a model to evaluate the ecological status of restoration strategies aimed at fish species living at a spawning site. Methods The model comprises hydro-morphodynamic and habitat modules. The modelling approach was applied with two restoration strategies (side-channel addition and riverbank reconstruction) and their corresponding post-restoration effects. Key results Three indicators were utilised to assess the ecological status of the spawning site. Modelling results showed poor ecological status under current hydrological conditions, with weighted usable area and overall suitability index values of 1.07 × 106 m2 and 0.41. Without implementing a restoration strategy, the ecological status would continue to fragment and deteriorate. Conclusions The weighted usable area can be recovered to 2.86 × 106 and 1.67 × 106 m2 in scenarios of side-channel and bank construction respectively. The overall suitability index values increase to 0.67 and 0.63 respectively. Implications It is also noted that the ecological restoration strategy (side-channel addition) can considerably enhance the freshwater Reeves shad’s habitat status. Additionally, the restoration strategy illustrated the feasibility of the side-channel addition restoration strategy.","PeriodicalId":18209,"journal":{"name":"Marine and Freshwater Research","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135141723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantifying the accessibility of sustainable seafood in south-eastern Queensland, Australia","authors":"Tia Vella, Leslie Roberson, Caitie Kuempel, Carissa Klein","doi":"10.1071/mf23054","DOIUrl":"https://doi.org/10.1071/mf23054","url":null,"abstract":"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 seafood products in south-eastern Queensland, Australia. Methods We assessed the sustainability of 8497 seafood products from 1050 restaurants, supermarkets, and takeaway shops. Key results We determined the sustainability of 31.83% of products according to Australia’s GoodFish guide. Of these, 4.25% were classified as sustainable, 3.35% as ‘Eat Less’, and 24.23% as ‘Say No’. Australian farmed barramundi was the most common sustainable product and farmed Australian Atlantic salmon the most common ‘Say No’ product. We could not assess 68.17% of products because of a lack of information (26.73%) or the product was not included in the GoodFish guide (41.44%). Conclusions Inadequate labelling of species, origin, or production or fishing method reduces the accessibility of sustainable seafood in south-eastrn Queensland, Australia. Implications Improving labelling, especially origin information at point of sale is critical for changing consumer behaviour, which represents a significant hurdle to improving the sustainability of the seafood industry.","PeriodicalId":18209,"journal":{"name":"Marine and Freshwater Research","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135592184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Molecular ecology of the Javanese ricefish, Oryzias javanicus (Bleeker): genetic divergence along the Indonesian Archipelago","authors":"Eko Hardianto, Mio Hirayama, Diah Permata Wijayanti, Hideyuki Imai","doi":"10.1071/mf23129","DOIUrl":"https://doi.org/10.1071/mf23129","url":null,"abstract":"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 (mtDNA) control region in 335 individuals and genotyped 280 individuals for four microsatellite loci from seven Indonesian sites. Key results Both genetic diversity (h = 0.19–0.86 and DIVGene = 0.10–0.43) and nucleotide diversity (π = 0.06–0.61%) were low compared with other fish taxa. The analysis of molecular variance showed considerable genetic differences (P < 0.0001) for both genetic markers across all sampled locations. These results suggest that there has been a historical restriction on gene flow. Conclusion The observed population-structure pattern reflects a short pelagic larval development, which is closely linked to a restricted dispersal potential. This ultimately leads to isolation by distance, potentially allowing local adaptation to sites that augment any oceanographic, geographic, or biological barriers to gene flow. Implications The results presented in this study can be used to create more effective ways to protect the species in question.","PeriodicalId":18209,"journal":{"name":"Marine and Freshwater Research","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136061438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Response of true limpet Patella aspera (Patellogastropoda) pediveliger larvae to a range of settlement cues","authors":"Diego Castejón, Loreto García, Natacha Nogueira, Carlos A. P. Andrade","doi":"10.1071/mf22270","DOIUrl":"https://doi.org/10.1071/mf22270","url":null,"abstract":"Context Settlement and metamorphosis are key processes influencing the natural recruitment and aquaculture production of aquatic organisms. Recruitment requirements in limpets (Patellogastropoda) are mostly unknown, because of the lack of reliable settlement inducers. Aims This study tested the reliability of different cues as settlement inducers for competent larvae of the economically valuable Patella aspera. Methods Natural crustose coralline algae (CCA) and biofilms of the benthic diatom Navicula salinicola were tested as positive controls. The following four pharmacological agents were tested as chemical inducers in a wide range of concentrations: gamma-aminobutyric acid (GABA), acetylcholine (ACH), 3-isobutyl-1-methylxanthine (IBMX) and potassium chloride (KCl). Settlers were identified by the velum loss and teleoconch development. Key results CCA were strong settlement cues in all the assays. Contrary to previous hypotheses, GABA was a weak inducer with a peak effect at 10−5 M. Neither the diatom biofilms nor the other pharmacological agents (ACH, IBMX and KCl) promoted the settlement response. All pharmacological agents at high concentrations influenced larval behaviour. Conclusions CCA were reliable positive controls and settlement inducers for the production of post-larvae. With regard to pharmacological agents, P. aspera showed restrictive settlement requirements that should be considered for ecological and aquaculture studies in other limpet species. Implications This method allows the study of the settlement biology of limpets. It provides a positive control and integrates animal monitoring and comparative response to other cues.","PeriodicalId":18209,"journal":{"name":"Marine and Freshwater Research","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135203005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On the chemistry of small waterbodies linked to marine aerosols and local geology on the Windmill Islands and mainland near Casey Station, Antarctica","authors":"Patrick De Deckker, Allan R. Chivas, Elmer Kiss, Nicole Mikkelson","doi":"10.1071/mf23080","DOIUrl":"https://doi.org/10.1071/mf23080","url":null,"abstract":"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 saturation indices. Methods Waters were analysed using standard methods, including for some elements, flame-atomic absorption spectrometry, spectrophotometry, ion chromatography and gravimetric determination. Mineral saturation indices were calculated using the PHREEQ program. Key results Water salinities were generally low and in the range of 120–1200 mg L−1 (total dissolved solids, TDS), except for one site connected to the sea, and four slightly saline sites. The Na/Cl, Cl/Br and Ca/SO4 ratios of several waters were in the vicinity of seawater ratios, implying a contribution of marine aerosols. However, the Mg/Ca ratio of most waters departed from the seawater ratio, plus there was concordance between the molar ratios of (Na + K)/(Ca + Mg) of many of the waters sampled and those calculated from rock geochemical analyses from diverse lithologies. Such chemical ‘provincialism’ appears to be dictated by rock composition. Nitrate and phosphate concentrations were high in the vicinity of penguin rookeries. Conclusions Two sources of ions are identified, one as marine aerosols as shown by three sets of ratios (Na/Cl, Cl/Br and Ca/SO4) with known marine values, and the other from the weathering of local rocks as shown by (Na + K)/(Ca + Mg) of the lake waters compared to the same ratios for the surrounding rocks. Only a few waterbodies have saturation levels for several carbonate minerals (calcite, aragonite, dolomite and rhodochrosite). Implications Future work is recommended for monitoring the waterbodies surrounding Casey Station as a result of the increased atmospheric CO2 concentration that has occurred over the past 40 years, and likely also with the cessation of building activities around Casey Station.","PeriodicalId":18209,"journal":{"name":"Marine and Freshwater Research","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135203000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"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","authors":"Muhamad Naimullah, Kuo-Wei Lan, Cheng-Hsin Liao, Yu-Jhen Yang, Chao-Ching Chen, Hon Jung Liew, Mhd Ikhwanuddin","doi":"10.1071/mf23064","DOIUrl":"https://doi.org/10.1071/mf23064","url":null,"abstract":"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 linear mixed models (GLMMs) to investigate data from Taiwanese vessels (2011–2019) on how spatial–temporal conditions and vessel capacity affected the catch of swimming crabs when using trawls, gill-nets and traps. Key results The results showed that the traps (&gt;80.0%) caught more swimming crabs in the TS than did the gill-nets (6.6%) and trawls (8.0%). Additionally, the GLMM analysis showed that Charybdis feriatus, Portunus pelagicus and Portunus sanguinolentus catches by traps and trawls were significantly affected by different fishing locations, climate events, work hours and vessel sizes. However, for gill-nets, spatial–temporal conditions and vessel capacity did not affect the catch of C. feriatus. Conclusions Monitoring fishing efforts and environmental factors is vital to understanding their impacts on marine ecosystems. Implications These findings enable future sustainable crab fishing through harvesting strategy planning, ecosystem management and spatial–temporal governance.","PeriodicalId":18209,"journal":{"name":"Marine and Freshwater Research","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135352813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Trophic resources use pathways between two coexisting freshwater shrimp (Palaemon argentinus and Macrobrachium borellii)","authors":"M. Florencia Viozzi, Verónica Williner","doi":"10.1071/mf23096","DOIUrl":"https://doi.org/10.1071/mf23096","url":null,"abstract":"Context A better understanding of the use of different trophic pathways as a mechanism for adjusting interactions between coexisting omnivorous decapod species may help define the extent of their influence on energy flows in freshwater ecosystems. Aims Analyse the patterns of use of the benthic and littoral pathways by Macrobrachium borellii and Palaemon argentinus during a hydrological cycle in lakes of the middle Paraná River. Methods The study was conducted during one high-water (HW) and one low-water (LW) period in three lakes permanently connected to the middle Paraná River. We calculated the relative contributions of potential basal resources (benthic and littoral) to each species for each lake and hydrological period using mixing models. Key results It was observed that M. borellii feeds more in the littoral pathway and P. argentinus in the benthic pathway, especially in low water where we observed that the partitioning of resources was more pronounced. Conclusion The more aggessive species, M. borelli, during HW period quickly utilises the bioavailable material. Trophic dynamics and resource use are part of the coexistence mechanisms of both decapod species. Implications This may have important consequences in the aquatic trophic webs in which these organisms participate, because when segregating the use of resources, they intervene in different energetic pathways.","PeriodicalId":18209,"journal":{"name":"Marine and Freshwater Research","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135981702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}