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1,017 results for “freshwater fish”
Fig. 9 in The non-native freshwater fishes of Singapore: an annotated compilation
Fig. 9. Scleropages jardini, ca. 350 mm SL, trade material.
Fig. 6 in The non-native freshwater fishes of Singapore: an annotated compilation
Fig. 6. Notopterus notopterus, ca. 250 mm SL, Tengeh Reservoir.
Fig. 5. Chitala ornata, 650 in The non-native freshwater fishes of Singapore: an annotated compilation
Fig. 5. Chitala ornata, 650 mm SL, Pandan Reservoir.
Fig. 4. Arapaima gigas, 181.2 in The non-native freshwater fishes of Singapore: an annotated compilation
Fig. 4. Arapaima gigas, 181.2 mm SL, trade material.
Fig. 2 in The non-native freshwater fishes of Singapore: an annotated compilation
Fig. 2. Atractosteus spatula, ca. 1,200 mm SL, Bedok Reservoir.
Fig. 90. Herichthys carpintis, 210 in The non-native freshwater fishes of Singapore: an annotated compilation
Fig. 90. Herichthys carpintis, 210 mm SL, Sungei Buloh.
Fig. 11 in Revision of the South American freshwater fish genus Laemolyta Cope, 1872 (Ostariophysi: Characiformes: Anostomidae)
Fig. 11. Scatter plot of body depth on standard length for populations of Laemolyta fernandezi.
Fig. 23 in Revision of the South American freshwater fish genus Laemolyta Cope, 1872 (Ostariophysi: Characiformes: Anostomidae)
Fig. 23. Laemolyta taeniata, lectotype, NMW 81379: 2, 159.4 mm SL; Brazil, rio Guaporé.
Fig. 5 in Revision of the South American freshwater fish genus Laemolyta Cope, 1872 (Ostariophysi: Characiformes: Anostomidae)
Fig. 5. Scatter plot of body depth on standard length for all species of Laemolyta.
Fig. 3 in Revision of the South American freshwater fish genus Laemolyta Cope, 1872 (Ostariophysi: Characiformes: Anostomidae)
Fig. 3. Premaxillary (pmx) of Laemolyta fernandezi, INPA 12234, 93.7 mm SL, left side, medial view.
Fig. 4. Laemolyta fernandezi, CAS 116126 in Revision of the South American freshwater fish genus Laemolyta Cope, 1872 (Ostariophysi: Characiformes: Anostomidae)
Fig. 4. Laemolyta fernandezi, CAS 116126, holotype, 73.1 mm SL; Venezuela, upper río Orinoco.
Seasonal variation of behavior and brain size in a freshwater fish
<p>Teleost fishes occupy a range of ecosystem and habitat types subject to large seasonal fluctuations. Temperate fishes in particular, survive large seasonal shifts in temperature, light availability, and access to certain habitats. Mobile species like lake trout (Salvelinus namaycush) can behaviorally respond to seasonal variation by shifting their habitat deeper and further offshore in response to warmer surface water temperatures during the summer. During cooler seasons, use of more structurally complex nearshore zones by lake trout could increase cognitive demands and potentially result in a larger relative brain size during those periods. Yet, there is limited understanding of how such behavioral responses to a seasonally shifting environment might shape, or be shaped by, the nervous system.</p> <p>Here we quantified variation in relative brain size and the size of five externally visible brain regions in lake trout, across six consecutive seasons in two different lakes. Acoustic telemetry data from one of our study lakes was collected during the study period from a different subset of individuals and used to infer relationships between brain size and seasonal behaviors (habitat use and movement rate). </p> <p>Our results indicated that lake trout relative brain size was larger in the fall and winter compared to the spring and summer in both lakes. Larger brains coincided with increased use of nearshore habitats and increased horizontal movement rates in the fall and winter based on acoustic telemetry. The telencephalon followed the same pattern as whole brain size, while the other brain regions (cerebellum, optic tectum, olfactory bulbs, hypothalamus) were only smaller in the spring. </p> <p>These findings provide evidence that flexibility in brain size could underpin shifts in behavior, which could potentially subserve functions associated with differential habitat use during cold and warm seasons and allow fish to succeed in seasonally variable environments.</p>
Figure 3 in Non-native freshwater fish from drainages of Rio Grande do Sul State, Brazil
Figure 3. Total number of records of exotic species by drainage basin cataloged in scientific collections between 1965 and 2020. No records were found in scientific collections for the big-headed carp Hypophthalmichthys molitrix.
Figure 12 in Non-native freshwater fish from drainages of Rio Grande do Sul State, Brazil
Figure 12. Serrasalmus maculatus (Palometa), UFRGS 28800, 75.1 mm SL, arroio dos Lourenços, tributary of the Rio Vacacaí, Laguna dos Patos system. Photo: Juliano Ferrer.
Figure 7 in Non-native freshwater fish from drainages of Rio Grande do Sul State, Brazil
Figure 7. Distribution of records of Acestrorhynchus pantaneiro in Río Uruguay, Laguna dos Patos and Rio Tramandaí basins.
Figure 11 in Non-native freshwater fish from drainages of Rio Grande do Sul State, Brazil
Figure 11. Number of records of allochthonous species Trachelyopterus lucenai recorded over the years in the Laguna dos Patos (SLP) and Rio Tramandaí (TRA) systems according to scientific collections databases. PR = First published record for the Rio Tramandaí system (Schifino et al., 2004).
Figure 16 in Non-native freshwater fish from drainages of Rio Grande do Sul State, Brazil
Figure 16. Number of records of exotic fish species introduced in Brazil according to scientific collections databases.
Figure 14 in Non-native freshwater fish from drainages of Rio Grande do Sul State, Brazil
Figure 14. Number of records of the ten exotic species found in Brazil by de- Figure 15. Number of records per decade between 1960 and 2020 of the cades between 1960 and 2020 according to scientific collections databases. two exotic species with the highest number of records in scientific collections.
Figure 9 in Non-native freshwater fish from drainages of Rio Grande do Sul State, Brazil
Figure 9. Number of records of allochthonous species Acestrorhynchus pantaneiro recorded over the years in the Laguna dos Patos (SLP) and Rio Tramandaí (TRA) systems according to scientific collections databases.
Figure 13 in Non-native freshwater fish from drainages of Rio Grande do Sul State, Brazil
Figure 13. Number of records of exotic species by Brazilian states according to scientific collections databases.
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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.