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862 results for “marine fish”
It's a wormy world: Meta-analysis reveals several decades of change in the global abundance of the parasitic nematodes Anisakis spp. and Pseudoterranova spp. in marine fishes and invertebrates
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Individual variation in marine larval-fish swimming speed and the emergence of dispersal kernels
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Data from: Homoploid hybrid speciation in a marine pelagic fish
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More but smaller: Marine heatwaves exacerbate size truncation in overfished fish communities in the Skagerrak
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Ecological and behavioural drivers of offspring size in marine teleost fishes
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Data for: Is the hyoid a constraint on innovation? A study in convergence driving feeding in fish-shaped marine tetrapods
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A Paleocene (Danian) marine osteoglossid (Teleostei, Osteoglossomorpha) from the Nuussuaq Basin of Greenland, with a brief review of Palaeogene marine bonytongue fishes
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DNA barcoding for the assessment of marine and coastal Fish Diversity from the Coast of Mozambique
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Exploring reserve and depth refuge effects on marine fish communities: Insights from environmental DNA metabarcoding
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Data from: Fish chorusing patterns in California (USA) National Marine Sanctuaries
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Data from: Phylogenomics of marine angelfishes: diagnosing sources of systematic discordance for an iconic reef fish family (F: Pomacanthidae)
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Data and code for: Trapped DNA fragments in marine sponge specimens unveil north Atlantic deep-sea fish diversity
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Data from: Internal injuries in marine fishes caught in beam trawls using electrical versus mechanical stimulations
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Tracking long-distance migration of marine fishes using compound-specific stable isotope analysis of amino acids
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Long-term changes in taxonomic and functional composition of European marine fish communities
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Improving metabarcoding taxonomic assignment: A case study of fishes in a large marine ecosystem
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Whole genome assembly and annotation of the King Angelfish (Holacanthus passer) gives insight into the evolution of marine fishes of the Tropical Eastern Pacific
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Changes in key traits versus depth and latitude suggest energy-efficient locomotion, opportunistic feeding and light lead to adaptive morphologies of marine fishes.
1. Understanding patterns and processes governing biodiversity along broad-scale environmental gradients, such as depth or latitude, requires an assessment of not just taxonomic richness, but also morphological and functional traits of organisms. Studies of traits can help to identify major selective forces acting on morphology. Currently, little is known regarding patterns of variation in the traits of fishes at broad spatial scales. 2. The aims of this study were: (i) to identify a suite of key traits in marine fishes that would allow assessment of morphological variability across broad-scale depth (50 – 1200 m) and latitudinal (29.15 – 50.91°S) gradients; and (ii) to characterise patterns in these traits across depth and latitude for 144 species of ray-finned fishes in New Zealand waters. 3. Here, we describe three new morphological traits: namely, fin-base-to-perimeter ratio, jaw-length-to-mouth-width ratio, and pectoral-fin-base-to-body-depth ratio. Four other morphological traits essential for locomotion and food acquisition that are commonly measured in fishes were also included in the study. Spatial ecological distributions of individual fish species were characterised in response to a standardised replicated sampling design and morphological measurements were obtained for each species from preserved museum specimens. 4. With increasing depth, fishes, on average, became larger and more elongate, with higher fin-base-to-perimeter ratio and larger jaw-length-to-mouth-width ratio, all of which translates into a more eel-like anguilliform morphology. Variation in mean trait values along the depth gradient was stronger at lower latitudes for fin-base-to-perimeter ratio, elongation and total body length. Average eye size peaked at intermediate depths (500-700 m) and increased with increasing latitude at 700 m. 5. These findings suggest that, in increasingly extreme environments, fish morphology shifts towards a body shape that favours an energy-efficient undulatory swimming style and an increase in jaw-length versus mouth width for opportunistic feeding. Furthermore, increases in eye size with both depth and latitude indicate that changes in both the average ambient light conditions as well as seasonal variations in day-length can act to select ecomorphological adaptations in fishes. 10-Oct-2019
Shared, modular chromosome rearrangements enable parallel adaptation in a marine fish
Genomic architecture and standing variation can play a key role in ecological adaptation, and contribute to the predictability of evolution. In Atlantic cod (Gadus morhua), four large chromosomal rearrangements have been associated with ecological gradients and migratory behaviour in regional analyses. However, the degree of parallelism , the extent of independent inheritance, and functional distinctiveness of these rearrangements remains poorly understood. Here, we use a 12K single nucleotide polymorphism (SNP) array to demonstrate extensive individual variation in rearrangement genotype within populations across the species range, suggesting that local adaptation to fine-scale ecological variation is enabled by rearrangements with independent inheritance. Our results demonstrate significant association of rearrangement with migration phenotype and environmental gradients across the species range. Individual rearrangements exhibit functional modularity, but also contain loci showing multiple environmental associations. Clustering in genetic distance trees and reduced differentiation within rearrangements across the species range are consistent with shared variation as a source of contemporary adaptive diversity in Atlantic cod. Conversely, we also find that haplotypes in the LG12 and LG1 rearranged region have diverged across the Atlantic, despite consistent environmental associations. Exchange of these structurally variable genomic regions, as well as local selective pressures have likely facilitated individual diversity within Atlantic cod stocks. Our results highlight the importance of genomic architecture and standing variation in enabling fine-scale adaptation in marine species.
Pre-closure fishing pressure predicts effects of marine protected areas
1. Marine Protected Areas (MPAs) can be effective tools for marine resource management. However, despite evidence of the positive effects of MPAs, such as increases in body sizes of organisms targeted by fisheries, there is often heterogeneity in biological outcomes among them. 2. Because fishing can drastically impact fish populations, the goal of this study was to determine if the levels of exploitation prior to protection could predict variation in the magnitude of MPA effects. 3. Using a diver operated stereo-video camera system, we compared sizes of fishes targeted by anglers within seven MPAs spanning the Southern California Bight to nearby comparison areas (non-MPAs). We used fine-scale data on pre-closure fishing pressure to test responses of fishes to protection along a gradient of exploitation. 4. Fish size responded to protection in proportion to pre-closure fishing pressure, with MPAs in areas with high pre-closure fishing having greater responses in average lengths and size distributions than those in areas with low fishing pressure. 5. This response was evident in species heavily targeted by recreational fishing, but not in species that were not targeted in fisheries. 6. Synthesis and applications: Pre-closure fishing pressure of an area can impact the efficacy of MPAs, and, when available, should be considered when predicting and evaluating MPA performance. Prioritizing heavily exploited areas for protection when implementing spatial management tools could maximize ecological outcomes.05-Nov-2019
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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.