The Experts below are selected from a list of 108 Experts worldwide ranked by ideXlab platform
Matthew D Taylor - One of the best experts on this subject based on the ideXlab platform.
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Lethal and Sub-Lethal Effects of Aluminium on a Juvenile Penaeid Shrimp
Thalassas: An International Journal of Marine Sciences, 2019Co-Authors: Angela Russell, Geoff R. Macfarlane, Barbara Nowak, Natalie A. Moltschaniwskyj, Matthew D TaylorAbstract:Catchment degradation and exposure of acid sulphate soils can affect estuarine water quality, and this can have impacts on the health of estuarine species and adversely affect Fishery Productivity. In degraded catchments, aluminium (Al) is mobilised from clay minerals following oxidation of acid sulphate soils, and may be harmful to estuarine crustaceans. We tested the acute toxicity and sub-lethal effects of Al for School Prawn ( Metapenaeus macleayi ), through a series of experiments conducted under normal (pH 8) and acidic (pH 5) conditions. Experimental data were used to examine mortality. Also, histological examination of the gills and hepatopancreas was conducted to determine pathological consequences of exposure to these stressors. School Prawn did not experience mortality in response to acute exposure to Al under normal pH conditions, but mortality and tissue bioaccumulation of Al was greater under acidic conditions, suggesting an interactive effect of both stressors. Histology revealed sub-lethal effects of Al including structural abnormalities in the gills and hepatopancreas, and evidence of viral infection and immune response, particularly at lower pH and higher Al concentrations. These impacts may impede major vital functions such as respiration, osmotic regulation, metabolism and growth of juvenile School Prawn, which could contribute to Productivity bottlenecks in degraded estuaries.
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estimating the potential Fishery benefits from targeted habitat repair a case study of school prawn metapenaeus macleayi in the lower clarence river estuary
Wetlands, 2018Co-Authors: Matthew D Taylor, Colin CreightonAbstract:Development around estuaries leads to degradation of tidal wetlands and alteration of tidal flows, which impacts on Fishery Productivity. Contemporary management seeks to lessen land-use impacts on aquatic environments and restore ecosystem services, and knowledge of potential benefits will inform investment and galvanize community action. We present a framework to estimate the potential benefits that may be derived from wetland repair, demonstrated through a case study for School Prawn (Metapenaeus macleayi) in Lake Wooloweyah, Clarence River estuary. Under a scenario of good School Prawn recruitment, habitat repair could yield a benefit of ~94 kg ha−1 of subtidal creek habitat, equating to a gross value of around AUD876 ha−1 and total output of around AUD5,175 ha−1 annually. Upscaling these calculations to reflect a scenario restoring 27.6 ha of subtidal channels at the mouth of Lake Wooloweyah would contribute an expected annual yield of 2569 kg in School Prawn harvest. These estimates are conservative, not accounting for the economic outcomes derived from other species directly utilising the additional habitat, or the outwelling of additional saltmarsh-derived Productivity. Simple models such as this are useful for assessing the potential benefits of habitat repair, and supporting investment of resources into on-ground works.
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habitat Fishery linkages in two major south eastern australian estuaries show that the c4 saltmarsh plant sporobolus virginicus is a significant contributor to fisheries Productivity
Hydrobiologia, 2018Co-Authors: Vincent Raoult, Troy F Gaston, Matthew D TaylorAbstract:Estuarine fisheries Productivity is dependent upon numerous factors, including the Productivity of primary producers supporting the food web and the transport of organic matter derived from those primary producers. In this study, we use stable isotope ratios in a Bayesian mixing model to estimate the contribution of primary producers to fully recruited commercial species in two important estuarine commercial fisheries in south-eastern Australia; the Hunter and Clarence estuaries. The C4 saltmarsh plant Sporobolus virginicus had the greatest contribution to consumer diet among almost all sites and times (25–95%), though for prawns the presence of seagrass may be exerting some influence on this calculated contribution in the Clarence estuary. Particulate organic matter (POM; 30%) and fine benthic organic matter (FBOM; 39–41%) also contributed significantly to consumer diet. Mangroves and other C3 sources generally had the lowest contribution to consumers (1–31%). While the exact contributions of each source are uncertain within our Bayesian framework, these results highlight the relatively large role of saltmarsh habitat as a contributor to Fishery Productivity, especially in estuaries with no seagrasses. Given the anthropogenic threats to saltmarsh habitat, there is potential for loss of Fishery Productivity with further loss of saltmarsh areal extent.
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habitat Fishery linkages in two major south eastern australian estuaries show that the c4 saltmarsh plant sporobolus virginicus is a significant contributor to fisheries Productivity
Hydrobiologia, 2018Co-Authors: Vincent Raoult, Troy F Gaston, Matthew D TaylorAbstract:Estuarine fisheries Productivity is dependent upon numerous factors, including the Productivity of primary producers supporting the food web and the transport of organic matter derived from those primary producers. In this study, we use stable isotope ratios in a Bayesian mixing model to estimate the contribution of primary producers to fully recruited commercial species in two important estuarine commercial fisheries in south-eastern Australia; the Hunter and Clarence estuaries. The C4 saltmarsh plant Sporobolus virginicus had the greatest contribution to consumer diet among almost all sites and times (25–95%), though for prawns the presence of seagrass may be exerting some influence on this calculated contribution in the Clarence estuary. Particulate organic matter (POM; 30%) and fine benthic organic matter (FBOM; 39–41%) also contributed significantly to consumer diet. Mangroves and other C3 sources generally had the lowest contribution to consumers (1–31%). While the exact contributions of each source are uncertain within our Bayesian framework, these results highlight the relatively large role of saltmarsh habitat as a contributor to Fishery Productivity, especially in estuaries with no seagrasses. Given the anthropogenic threats to saltmarsh habitat, there is potential for loss of Fishery Productivity with further loss of saltmarsh areal extent.
Vincent Raoult - One of the best experts on this subject based on the ideXlab platform.
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habitat Fishery linkages in two major south eastern australian estuaries show that the c4 saltmarsh plant sporobolus virginicus is a significant contributor to fisheries Productivity
Hydrobiologia, 2018Co-Authors: Vincent Raoult, Troy F Gaston, Matthew D TaylorAbstract:Estuarine fisheries Productivity is dependent upon numerous factors, including the Productivity of primary producers supporting the food web and the transport of organic matter derived from those primary producers. In this study, we use stable isotope ratios in a Bayesian mixing model to estimate the contribution of primary producers to fully recruited commercial species in two important estuarine commercial fisheries in south-eastern Australia; the Hunter and Clarence estuaries. The C4 saltmarsh plant Sporobolus virginicus had the greatest contribution to consumer diet among almost all sites and times (25–95%), though for prawns the presence of seagrass may be exerting some influence on this calculated contribution in the Clarence estuary. Particulate organic matter (POM; 30%) and fine benthic organic matter (FBOM; 39–41%) also contributed significantly to consumer diet. Mangroves and other C3 sources generally had the lowest contribution to consumers (1–31%). While the exact contributions of each source are uncertain within our Bayesian framework, these results highlight the relatively large role of saltmarsh habitat as a contributor to Fishery Productivity, especially in estuaries with no seagrasses. Given the anthropogenic threats to saltmarsh habitat, there is potential for loss of Fishery Productivity with further loss of saltmarsh areal extent.
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habitat Fishery linkages in two major south eastern australian estuaries show that the c4 saltmarsh plant sporobolus virginicus is a significant contributor to fisheries Productivity
Hydrobiologia, 2018Co-Authors: Vincent Raoult, Troy F Gaston, Matthew D TaylorAbstract:Estuarine fisheries Productivity is dependent upon numerous factors, including the Productivity of primary producers supporting the food web and the transport of organic matter derived from those primary producers. In this study, we use stable isotope ratios in a Bayesian mixing model to estimate the contribution of primary producers to fully recruited commercial species in two important estuarine commercial fisheries in south-eastern Australia; the Hunter and Clarence estuaries. The C4 saltmarsh plant Sporobolus virginicus had the greatest contribution to consumer diet among almost all sites and times (25–95%), though for prawns the presence of seagrass may be exerting some influence on this calculated contribution in the Clarence estuary. Particulate organic matter (POM; 30%) and fine benthic organic matter (FBOM; 39–41%) also contributed significantly to consumer diet. Mangroves and other C3 sources generally had the lowest contribution to consumers (1–31%). While the exact contributions of each source are uncertain within our Bayesian framework, these results highlight the relatively large role of saltmarsh habitat as a contributor to Fishery Productivity, especially in estuaries with no seagrasses. Given the anthropogenic threats to saltmarsh habitat, there is potential for loss of Fishery Productivity with further loss of saltmarsh areal extent.
Troy F Gaston - One of the best experts on this subject based on the ideXlab platform.
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habitat Fishery linkages in two major south eastern australian estuaries show that the c4 saltmarsh plant sporobolus virginicus is a significant contributor to fisheries Productivity
Hydrobiologia, 2018Co-Authors: Vincent Raoult, Troy F Gaston, Matthew D TaylorAbstract:Estuarine fisheries Productivity is dependent upon numerous factors, including the Productivity of primary producers supporting the food web and the transport of organic matter derived from those primary producers. In this study, we use stable isotope ratios in a Bayesian mixing model to estimate the contribution of primary producers to fully recruited commercial species in two important estuarine commercial fisheries in south-eastern Australia; the Hunter and Clarence estuaries. The C4 saltmarsh plant Sporobolus virginicus had the greatest contribution to consumer diet among almost all sites and times (25–95%), though for prawns the presence of seagrass may be exerting some influence on this calculated contribution in the Clarence estuary. Particulate organic matter (POM; 30%) and fine benthic organic matter (FBOM; 39–41%) also contributed significantly to consumer diet. Mangroves and other C3 sources generally had the lowest contribution to consumers (1–31%). While the exact contributions of each source are uncertain within our Bayesian framework, these results highlight the relatively large role of saltmarsh habitat as a contributor to Fishery Productivity, especially in estuaries with no seagrasses. Given the anthropogenic threats to saltmarsh habitat, there is potential for loss of Fishery Productivity with further loss of saltmarsh areal extent.
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habitat Fishery linkages in two major south eastern australian estuaries show that the c4 saltmarsh plant sporobolus virginicus is a significant contributor to fisheries Productivity
Hydrobiologia, 2018Co-Authors: Vincent Raoult, Troy F Gaston, Matthew D TaylorAbstract:Estuarine fisheries Productivity is dependent upon numerous factors, including the Productivity of primary producers supporting the food web and the transport of organic matter derived from those primary producers. In this study, we use stable isotope ratios in a Bayesian mixing model to estimate the contribution of primary producers to fully recruited commercial species in two important estuarine commercial fisheries in south-eastern Australia; the Hunter and Clarence estuaries. The C4 saltmarsh plant Sporobolus virginicus had the greatest contribution to consumer diet among almost all sites and times (25–95%), though for prawns the presence of seagrass may be exerting some influence on this calculated contribution in the Clarence estuary. Particulate organic matter (POM; 30%) and fine benthic organic matter (FBOM; 39–41%) also contributed significantly to consumer diet. Mangroves and other C3 sources generally had the lowest contribution to consumers (1–31%). While the exact contributions of each source are uncertain within our Bayesian framework, these results highlight the relatively large role of saltmarsh habitat as a contributor to Fishery Productivity, especially in estuaries with no seagrasses. Given the anthropogenic threats to saltmarsh habitat, there is potential for loss of Fishery Productivity with further loss of saltmarsh areal extent.
Peter J Mumby - One of the best experts on this subject based on the ideXlab platform.
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vulnerability of coral reef fisheries to a loss of structural complexity
Current Biology, 2014Co-Authors: Alice Rogers, Julia L Blanchard, Peter J MumbyAbstract:Summary Coral reefs face a diverse array of threats, from eutrophication and overfishing to climate change. As live corals are lost and their skeletons eroded, the structural complexity of reefs declines. This may have important consequences for the survival and growth of reef fish because complex habitats mediate predator-prey interactions [1, 2] and influence competition [3–5] through the provision of prey refugia. A positive correlation exists between structural complexity and reef fish abundance and diversity in both temperate and tropical ecosystems [6–10]. However, it is not clear how the diversity of available refugia interacts with individual predator-prey relationships to explain emergent properties at the community scale. Furthermore, we do not yet have the ability to predict how habitat loss might affect the Productivity of whole reef communities and the fisheries they support. Using data from an unfished reserve in The Bahamas, we find that structural complexity is associated not only with increased fish biomass and abundance, but also with nonlinearities in the size spectra of fish, implying disproportionately high abundances of certain size classes. By developing a size spectrum food web model that links the vulnerability of prey to predation with the structural complexity of a reef, we show that these nonlinearities can be explained by size-structured prey refugia that reduce mortality rates and alter growth rates in different parts of the size spectrum. Fitting the model with data from a structurally complex habitat, we predict that a loss of complexity could cause more than a 3-fold reduction in Fishery Productivity. Video Abstract
A K Das - One of the best experts on this subject based on the ideXlab platform.
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enhancing Fishery Productivity in small reservoir in india technical manual
Research Papers in Economics, 2009Co-Authors: K K Vass, N P Shrivastava, P K Katiha, A K DasAbstract:This document is part of a series of 5 technical manuals produced by the Challenge Program Project CP34 A´Improved fisheries Productivity and management in tropical reservoirsA¶. Inland capture fisheries in India have declined in recent years, leaving thousands of fishers to sink deeper into poverty. Freshwater aquaculture in small water bodies like ponds now contributes 80% of the countryA»s inland fish production. This manual outlines the use of small reservoir for freshwater aquacultureas a means of providing rural areas with food and livelihoods and protecting aquatic ecosystems, in particular by facilitating the conservation of indigenous fish species.
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enhancing Fishery Productivity in small reservoir in india technical manual
Enhancing fishery productivity in small reservoir in India: technical manual., 2009Co-Authors: K K Vass, N P Shrivastava, P K Katiha, A K DasAbstract:This document is part of a series of 5 technical manuals produced by the Challenge Program Project CP34 “Improved fisheries Productivity and management in tropical reservoirs”. Inland capture fisheries in India have declined in recent years, leaving thousands of fishers to sink deeper into poverty. Freshwater aquaculture in small water bodies like ponds now contributes 80% of the countryi¯s inland fish production. This manual outlines the use of small reservoir for freshwater aquacultureas a means of providing rural areas with food and livelihoods and protecting aquatic ecosystems, in particular by facilitating the conservation of indigenous fish species. (PDF contains 22 pages)