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55 results for “commercial fishes”
Commercial fishing influences life histories of fish in the world’s largest desert lake
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Data from: Projected impacts of warming seas on commercially fished species at a biogeographic boundary of the European continental shelf
<p>1. Projecting the future effects of climate change on marine fished populations can help prepare the fishing industry and management systems for resulting ecological, social and economic changes. Generating projections using multiple climate scenarios can provide valuable insights for fisheries stakeholders regarding uncertainty arising from future climate data.</p> <p>2. Using a range of climate projections based on the Intergovernmental Panel on Climate Change A1B, RCP4.5 and RCP8.5 climate scenarios, we modelled abundance of eight commercially important bottom dwelling fish species across the Celtic Sea, English Channel and southern North Sea through the 21<sup>st</sup> century. This region spans a faunal boundary between cooler northern waters and warmer southern waters, where mean sea surface temperatures are projected to rise by 2 to 4ºC by 2098.</p> <p>3. For each species, Generalised Additive Models were trained on spatially explicit abundance data from six surveys between 2001 and 2010. Annual and seasonal temperatures were key drivers of species abundance patterns. Models were used to project species abundance for each decade through to 2090.</p> <p>4. Projections suggest important future changes in the availability and catchability of fish species, with projected increases in abundance of red mullet (<i>Mullus surmuletus</i> L.), Dover sole (<i>Solea solea </i>L.), John dory (<i>Zeus faber</i> L.) and lemon sole (<i>Microstomus kitt</i> L.) and decreases in abundance of Atlantic cod (<i>Gadus morhua</i> L.), anglerfish (<i>Lophius piscatorius</i> L.) and megrim (<i>Lepidorhombus whiffiagonis</i> L.). European plaice (<i>Pleuronectes platessa </i>L.) appeared less affected by projected temperature changes. Most projected abundance responses were comparable among climate projections, but uncertainty in the rate and magnitude of changes often increased substantially beyond 2040.</p> <p>5. <i>Synthesis and applications</i>. These results indicate potential risks as well as some opportunities for demersal fisheries under climate change. These changes will challenge current management systems, with implications for decisions on target fishing mortality rates, fishing effort and allowable catches. Increasingly flexible and adaptive approaches that reduce climate impacts on species while also supporting industry adaptation are required.</p>
Data from: Demographic plasticity facilitates ecological and economic resilience in a commercially important reef fish
1. Variation in life-history characteristics is evident within and across animal populations. Such variation is mediated by environmental gradients and reflects metabolic constraints or trade-offs that enhance reproductive outputs. While generalizations of life-history relationships across species provide a framework for predicting vulnerability to overexploitation, deciphering patterns of intraspecific variation may also enable recognition of peculiar features of populations that facilitate ecological resilience. 2. This study combines age-based biological data from geographically disparate populations of bluespine unicornfish (Naso unicornis)—the most commercially-valuable reef-associated species in the insular Indo-Pacific—to explore the magnitude and drivers of variation in life span and examine the mechanisms enabling peculiar mortality schedules. 3. Longevity and mortality schedules were investigated across eleven locations encompassing a range of latitudes and exploitation levels. The presence of different growth types was examined using back-calculated growth histories from otoliths. Growth-type dependent mortality (mortality rates associated with particular growth trajectories) was corroborated using population models that incorporated size-dependent competition. 4. We found a threefold geographic variation in life span that was strongly linked to temperature, but not to anthropogenic pressure or ocean productivity. All populations consistently displayed a two-phase mortality schedule, with higher than expected natural mortality rates in earlier stages of post-settlement life. Reconstructed growth histories and population models demonstrated that variable growth types within populations can yield this peculiar biphasic mortality schedule, where fast growers enjoy early reproductive outputs at the expense of greater mortality, and benefits for slow growers derive from extended reproductive outputs over a greater number of annual cycles. This promotes population resilience because individuals can take advantage of cycles of environmental change operating at both short and long-term scales. 5. Our results highlight a prevailing, fundamental misperception when comparing the life histories of long-lived tropical ectotherms: the seemingly incongruent combination of extended life spans with high mortality rates was enabled by coexistence of variable growth types in a population. Thus a demographic profile incorporating contrasting growth and mortality strategies obscures the demographic effects of harvest across space or time in N. unicornis and possibly other ectotherms with the combination of longevity and asymptotic growth.
Data from: Effects of seal predation on a modelled marine fish community and consequences for a commercial fishery
We constructed a size- and trait-based dynamic marine community model of the Celtic Sea/Biologically Sensitive Area, including grey seals Halichoerus grypus (Fabricius 1791) and harbour seals Phoca vitulina vitulina (Linnaeus 1758) to examine potential resource conflict between seals and commercial trawl fisheries. The model incorporates seal diet preference, population size and commercial fishery catch, with survey data to quantify ecological interactions between seals and fisheries. Total annual consumption by seals was an order of magnitude less than the catch of the modelled trawl fishery. Increasing fishing pressure reduced fish spawning stock biomass (SSB) much more than a proportionally equivalent increase in seal predation. For most fish species, quadrupling seal predation showed little effect on the predicted fishery catch. These results arise from relatively low seal abundance and partial niche partitioning. The fishery harvested a wider range of fish lengths and species than seals consumed. The fish community was dominated by small fish lengths and seals predated on these more than suggested by their calculated diet preference. Seal predation disproportionately affected several fish species not targeted by the fishery, but seal predation did not significantly affect the SSB of any of the species that constitute 90% of the total landings of the fishery. Synthesis and applications. Predation of fish by grey and harbour seals is unlikely to harm commercial trawl fisheries in south-west Irish waters. This conclusion differs from those of some model-based studies of other North Atlantic systems, demonstrating the need for ecosystem-specific evidence in considering such conflicts. In systems with low niche overlap between seals and fisheries, the two are largely decoupled in effect, leaving fishing pressure as the overwhelming determinant of targeted fish stock status.
Data from: Impact of disease on the survival of three commercially fished species
Recent increases in emergent infectious diseases have raised concerns about the population stability of some marine species. The complexity and expense of studying diseases in marine systems often dictate that conservation and management decisions are made without quantitative data on population-level impacts of disease. Mark-recapture is a powerful, underutilized, tool for calculating impacts of disease on population size and structure, even in the absence of etiological information. We applied logistic regression models to mark-recapture data to obtain estimates of disease-associated mortality rates in three commercially-important marine species: snow crab (Chionoecetes opilio) in Newfoundland, Canada, that experience sporadic epizootics of bitter crab disease; striped bass (Morone saxatilis) in the Chesapeake Bay, USA, that experience chronic dermal and visceral mycobacteriosis; and American lobster (Homarus americanus) in the Southern New England stock, that experience chronic epizootic shell disease. All three diseases decreased survival of diseased hosts. Survival of diseased adult male crabs was 1% (0.003 – 0.022, 95% CI) that of uninfected crabs indicating nearly complete mortality of infected crabs in this life stage. Survival of moderately and severely diseased striped bass (which comprised 15% and 11% of the population, respectively) was 84% (70 – 100%, 95% CI), and 54% (42- 68%, 95% CI) and that of healthy striped bass. The disease-adjusted yearly natural mortality rate for striped bass was 0.29, nearly double the previously accepted value, which did not include disease. Survival of moderately and severely diseased lobsters was 30% (15 – 60%, 95% CI) that of healthy lobsters and survival of mildly diseased lobsters was 45% (27 – 75%, 95% CI) that of healthy lobsters. High disease mortality in ovigerous females may explain the poor recruitment and rapid declines observed in this population. Stock assessments should account for disease-related mortality when resource management options are evaluated.
Data Figures Indicators of the 'wild seafood' provisioning ecosystem service based on the surplus production of commercial fish stocks
<p>This excel sheet contains the underlying data for the Figures that are presented by Piet al (2017).</p> <p>Piet, GJ, HMJ van Overzee, DCM Miller, E Royo Gelabert, 2017. Indicators of the ‘wild seafood’ provisioning ecosystem service based on the surplus production of commercial fish stocks. Ecological Indicators, Volume 72: 194-202.</p>
Dataset for modeling distribution of commercial fish and shrimps
<p>This dataset show output of MaxEnt for modeling distribution of commercial fish and shrimps </p>
Data from: Projected impacts of warming seas on commercially fished species at a biogeographic boundary of the European continental shelf
Open the record for dataset details and reuse information.
Data from: Impact of disease on the survival of three commercially fished species
Open the record for dataset details and reuse information.
Data from: Effects of seal predation on a modelled marine fish community and consequences for a commercial fishery
Open the record for dataset details and reuse information.
Data from: Demographic plasticity facilitates ecological and economic resilience in a commercially important reef fish
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Figure 1 in Socioeconomic aspects and profile of fishing according to fishers of commercial edible fish in the municipality of Barcelos, middle Negro River, Amazonas, Brazil
Figure 1. Demonstrative map of the region of the Municipality of Barcelos in the middle Negro River basin, State of Amazonas.
Figure 5 in Socioeconomic aspects and profile of fishing according to fishers of commercial edible fish in the municipality of Barcelos, middle Negro River, Amazonas, Brazil
Figure 5. Age of onset in the commercial fishing activity of fishermen in the municipality of Barcelos, in the middle Negro River basin, Amazonas.
Figure 8 in Microplastics in commercial fish digestive tracts from freshwater habitats in Northern Thailand
Figure 8. Comparison of abundance of plastics among fishes from different habitat groups (demersal, benthopelagic, and pelagic fishes).
Physiological PBPK parameters from commercially relevant fish species in the Arctic region
<p>Dataset with values collected for a list of species deemed commercially relevant, who are present in the Arctic region. The aim of the literature search was to assess the data availability of physiological parameters for an Arctic Physiologically-based pharmacokinetic (PBPK) model. The literature search was conducted in the Web of Science database, in addition to searches for all listed species in the local database at The Norwegian Institute of Water Research (NIVA), and data was shared for Atlantic cod <em>(Gadus morhua), </em>and Atlantic halibut <em>(Hippoglossus hippoglossus) </em>by The Norwegian Institute of Marine Research (IMR/HI). Includes one sheet of data for lipid content of different tissues, tissue volumes, blood flow to tissues, cardiac output and oxygen consumption rates retrieved from FishBase (https://www.fishbase.se/)</p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.