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694 results for “fish diversity”
Sponge presence increases the diversity and abundance of fish and invertebrates in a subtropical seagrass bed
<p>Ecosystem engineers (e.g., seagrasses) can have profound effects on biodiversity and community structure. Sponges possess many traits (e.g., create complex structure) that suggest they may act as ecosystem engineers, but we know little about their relationships with the animal communities that inhabit seagrass beds. This study explored the effects of the marine sponge, <em>Ircinia</em> <em>felix</em>, on fish and invertebrate taxa richness, abundance, turnover, and community composition in a seagrass bed through a 1-year field experiment performed in The Bahamas. We recorded the fish and invertebrate communities present in 5 × 5 m plots with the addition of either a live sponge, a polypropylene sponge replica (structure), or no additional structure (control). Both taxonomic groups responded similarly to the addition of a live sponge. Taxa richness and abundance increased at least 4-fold over a year in the presence of <em>I</em>. <em>felix</em> but decreased 2-fold or more in the other plot types. Live sponge presence increased the number of new taxa gained by at least 24% and reduced the number of taxa lost compared to other plot types. Finally, we found that the fish community shifted in a more consistent direction in the presence of a live sponge than in the other plots. Our study shows that sponges can act as ecosystem engineers in subtropical seagrass systems; however, additional research is needed to determine the full extent and implications of their ecological effects.</p>
High functional diversity in deep-sea fish communities and increasing intra-specific trait variation with increasing latitude
<p>Variation in both inter- and intra-specific traits affect community dynamics, yet we know little regarding the relative importance of external environmental filters vs internal biotic interactions that shape the functional space of communities along broad-scale environmental gradients, such as latitude, elevation or depth. We examined changes in several key aspects of functional alpha-diversity for marine fishes along depth and latitude gradients by quantifying intra- and inter-specific richness, dispersion and regularity in functional trait space. We derived eight functional traits related to food acquisition and locomotion, and calculated seven complementary indices of functional diversity for 144 species of marine ray-finned fishes along large-scale depth (50 m – 1200 m) and latitudinal gradients (29° – 51° S) in New Zealand waters. Traits were derived from morphological measurements taken directly from footage obtained using Baited Remote Underwater Stereo-Video systems and museum specimens. We partitioned functional variation into intra- and inter-specific components for the first time using a PERMANOVA approach. We also implemented two tree-based diversity metrics in a functional distance-based context for the first time: namely, the variance in pairwise functional distance, and the variance in nearest-neighbour distance. Functional alpha diversity increased with increasing depth, and decreased with increasing latitude. More specifically, the dispersion and mean nearest-neighbour distances among species in trait space, and intra-specific trait variability all increased with depth, whereas functional hypervolume (richness) was stable across depth. In contrast, functional hypervolume, dispersion and regularity indices all decreased with increasing latitude; however, intra-specific trait variation increased with latitude, suggesting that intra-specific trait variability becomes increasingly important at higher latitudes. These results suggest that competition within and among species are key processes shaping functional multi-dimensional space for fishes in the deep sea. Increasing morphological dissimilarity with increasing depth may facilitate niche partitioning to promote coexistence, whereas abiotic filtering may be the dominant process structuring communities with increasing latitude.</p>
Genotype and genetic diversity data for: Contrasts in riverscape patterns of intraspecific genetic variation in a diverse Neotropical fish community of high conservation value
<p><span>Spatial patterns in genetic variation compared across species provide information about the predictability of genetic diversity of natural populations and areas requiring conservation measures. Due to their remarkable fish diversity, rivers in Neotropical regions are ideal systems to confront theory with observations and would benefit greatly from such approaches given their increasing vulnerability to anthropogenic pressures. We used SNP data from 18 fish species with contrasting life-history traits, co-sampled across 12 sites in the Maroni – a major river system from the Guiana Shield – to compare patterns of intraspecific genetic variation and identify their underlying drivers. Analyses of covariance revealed a decrease in genetic diversity as distance from the river outlet increased for 5 of the 18 species, illustrating a pattern commonly observed in riverscapes for species with low-to-medium dispersal abilities. However, mean within-site genetic diversity was lowest in the two easternmost tributaries of the Upper Maroni and around an urbanized location downstream, indicating the need to address the potential influence of local pressures in these areas, such as goldmining or fishing. Finally, the relative influence of isolation by stream distance, isolation by discontinuous river flow and isolation by spatial heterogeneity in effective size on pairwise genetic differentiation varied across species. Species with similar dispersal and reproductive guilds did not necessarily display shared patterns of population structure. Increasing the knowledge of specific life history traits and ecological requirements of fish species in these remote areas should help further understand factors that influence their current patterns of genetic variation.</span></p>
Fig. 47 in The non-native freshwater fishes of Hong Kong: diversity, distributions, and origins
Fig. 47. Poecilia sphenops (melanistic variety), Lam Tsuen River, note damaged dorsal fin, photographed by Chun Hin Wan.
Fig. 53 in The non-native freshwater fishes of Hong Kong: diversity, distributions, and origins
Fig. 53. Distribution of non-native freshwater fish species in Hong Kong. Each record was location and species-specific, which means that multiple records of one species in the same locality were represented only once in the heatmap. In total there are 999 locality records for 93 species (two species have unknown distribution) and five hybrids.
Fig. 52 in The non-native freshwater fishes of Hong Kong: diversity, distributions, and origins
Fig. 52. First records of non-native freshwater fish species from 1930 to 2022 and their suspected introduction sources.
Fig. 48. Xiphophorus hellerii, 34.8 in The non-native freshwater fishes of Hong Kong: diversity, distributions, and origins
Fig. 48. Xiphophorus hellerii, 34.8 mm SL female (top), 35.1 mm SL male (middle), Wong Lung Hang Stream, 38.8 mm SL redvariety male (bottom), Tai Po Kau Nature Reserve.
Fig. 59 in The non-native freshwater fishes of Hong Kong: diversity, distributions, and origins
Fig. 59. Gobiopterus cf. macrolepis, non-native specimen (top), Tai Lam Chung Reservoir, native specimen (female with eggs) (bottom), Kam Tin River.
Fig. 46. Poecilia salvatoris, 30 in The non-native freshwater fishes of Hong Kong: diversity, distributions, and origins
Fig. 46. Poecilia salvatoris, 30 mm SL female (top), Lam Tsuen River, 30 mm SL male (bottom), Sam Dip Tam Stream.
Fig. 43. Gambusia affinis, 23.9 in The non-native freshwater fishes of Hong Kong: diversity, distributions, and origins
Fig. 43. Gambusia affinis, 23.9 mm SL female (top), Lam Tsuen River, 18.2 mm SL male (bottom), Lin Au Stream.
Fig. 8. Cyprinus carpio wild type, 307 in The non-native freshwater fishes of Hong Kong: diversity, distributions, and origins
Fig. 8. Cyprinus carpio wild type, 307 mm SL, Tai O River (top), ornamental variety, 596mm SL, Shing Mun Reservoir (bottom).
Fig. 22. A in The non-native freshwater fishes of Hong Kong: diversity, distributions, and origins
Fig. 22. A, Channa argus, Ng Tung River, Channa maculata, B1, (dorsal head pattern), B2, (lateral pattern), She Shan River (uncertain origin), Channa argus × Channa maculata hybrid, C1, (dorsal head pattern), C2, (lateral pattern), Ng Tung River.
Supplementary data for Long-term trends in functional diversity of exploited marine fish in the Azores archipelago: past and present
<p>Supplementary infromation for the manuscript entitled "<strong>Long-term trends in functional diversity of exploited marine fish in the Azores’ archipelago: past and present</strong>"</p>
FIGURE 8. Labeo manasseeae, n in Description of two new Labeo (Labeoninae; Cyprinidae) endemic to the Lulua River in the Democratic Republic of Congo (Kasai ecoregion); a hotspot of fish diversity in the Congo basin
FIGURE 8. Labeo manasseeae, n. sp. Holotype (AMNH 269110): CT scan renderings of A. posterior neurocranium, Weberian apparatus and proximal axial elements; B. isolated urohyal bone; and C. infraorbital series. Scale bars = 1 mm.
FIGURE 6. Labeo mbimbii, n in Description of two new Labeo (Labeoninae; Cyprinidae) endemic to the Lulua River in the Democratic Republic of Congo (Kasai ecoregion); a hotspot of fish diversity in the Congo basin
FIGURE 6. Labeo mbimbii, n. sp. Holotype (AMNH 277862): CT scan renderings of A. posterior neurocranium, Weberian apparatus and proximal axial elements; B. isolated urohyal bone; and C. infraorbital series. Scale bars = 1 mm
FIGURE 5. Labeo mbimbii, n in Description of two new Labeo (Labeoninae; Cyprinidae) endemic to the Lulua River in the Democratic Republic of Congo (Kasai ecoregion); a hotspot of fish diversity in the Congo basin
FIGURE 5. Labeo mbimbii, n. sp. Holotype (AMNH 277862, AMCC 249232) in A. lateral view, immediately postmortem; B. in preservation, lateral view; C. ventral view; and D. dorsal view. Scale bar = 1 cm.
FIGURE 2 in Description of two new Labeo (Labeoninae; Cyprinidae) endemic to the Lulua River in the Democratic Republic of Congo (Kasai ecoregion); a hotspot of fish diversity in the Congo basin
FIGURE 2. Homologous landmarks used in geometric morphometric analyses (following Armbruster, 2012): A. lateral and B. ventral views.
FIGURE 1. A in Description of two new Labeo (Labeoninae; Cyprinidae) endemic to the Lulua River in the Democratic Republic of Congo (Kasai ecoregion); a hotspot of fish diversity in the Congo basin
FIGURE 1. A. Longitudinal profile of the Lulua River indicating subdivision into three sections based on channel slope gradient (after Mbimbi et al., 2021). B. Lulua River basin showing collection localities of the two new species (arrows indicate type localities). C. Location of the Congo basin, Kasai, Lulua, and adjacent ecoregions.
FIGURE 4. A in Description of two new Labeo (Labeoninae; Cyprinidae) endemic to the Lulua River in the Democratic Republic of Congo (Kasai ecoregion); a hotspot of fish diversity in the Congo basin
FIGURE 4. A. Scatterplot of PC2 against PC1 (PCA of 13 meristic counts for 120 specimens representative of 9 species). B. Scatterplot of PC2 against PC1 (PCA of 12 meristic counts for 44 specimens representative of the five species overlapping with L. manasseeae in A). C. Scatterplot of PC2 against PC1 (log-transformed matrix, 12 morphometric measurements, for 114 specimens representative of 8 species).
FIGURE 7. Labeo manasseeae, n in Description of two new Labeo (Labeoninae; Cyprinidae) endemic to the Lulua River in the Democratic Republic of Congo (Kasai ecoregion); a hotspot of fish diversity in the Congo basin
FIGURE 7. Labeo manasseeae, n. sp. Holotype (AMNH 269110, AMCC 249240): A. immediately postmortem; B. in preservation, lateral view; C. ventral view; and D. dorsal view. Scale bar = 1 cm
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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.