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528 results for “Killifish”
Data from: Predation drives the evolution of brain cell proliferation and brain allometry in male Trinidadian killifish, Rivulus hartii
<p>The external environment influences brain cell proliferation, and this might contribute to brain plasticity underlying adaptive behavioural changes. Additionally, internal genetic factors influence brain cell proliferation rate. However, to date, researchers have not examined the importance of environmental vs. genetic factors in causing natural variation in brain cell proliferation. Here, we examine brain cell proliferation and brain growth trajectories in free-living populations of Trinidadian killifish, Rivulus hartii, exposed to contrasting predation environments. Compared to populations without predators, populations in high predation environments exhibited higher rates of brain cell proliferation and a steeper brain growth trajectory (relative to body size). To test whether these differences in the wild persist in a common garden environment, we reared first generation fish originating from both predation environments in uniform laboratory conditions. Just as in the wild, brain cell proliferation and brain growth in the common garden were greater in high predation populations than in no predation populations. The similar results in field and common garden studies indicate that population differences in these brain features are intrinsic, probably genetic, differences arising from natural selection acting on overall brain growth and life history rather than differences arising through phenotypic plasticity.</p>
FIGURE 5. Aphyolebias boticarioi, UFRJ 5987 in Moema apurinan sp. n. and Aphyolebias boticarioi sp. n. (Teleostei: Cyprinodontiformes: Rivulidae): two new annual killifishes from the Rio Purus basin, Brazilian Amazon
FIGURE 5. Aphyolebias boticarioi, UFRJ 5987, female, paratype, 32.4 mm SL (one day after collection; pectoral, caudal and anal fins damaged); Brazil: Acre: Porto do Acre: Rio Purus basin.
FIGURE 4. Aphyolebias boticarioi, UFRJ 5986 in Moema apurinan sp. n. and Aphyolebias boticarioi sp. n. (Teleostei: Cyprinodontiformes: Rivulidae): two new annual killifishes from the Rio Purus basin, Brazilian Amazon
FIGURE 4. Aphyolebias boticarioi, UFRJ 5986, male, holotype, 42.1 mm SL (one day after collection; caudal and anal fins damaged); Brazil: Acre: Porto do Acre: Rio Purus basin.
FIGURE 2. Moema apurinan, UFRJ 5981 in Moema apurinan sp. n. and Aphyolebias boticarioi sp. n. (Teleostei: Cyprinodontiformes: Rivulidae): two new annual killifishes from the Rio Purus basin, Brazilian Amazon
FIGURE 2. Moema apurinan, UFRJ 5981, female, paratype, 44.4 mm SL (one day after collection); Brazil: Acre: Porto do Acre: Rio Purus basin.
FIGURE 1. Moema apurinan, UFRJ 5980 in Moema apurinan sp. n. and Aphyolebias boticarioi sp. n. (Teleostei: Cyprinodontiformes: Rivulidae): two new annual killifishes from the Rio Purus basin, Brazilian Amazon
FIGURE 1. Moema apurinan, UFRJ 5980, male, holotype, 52.5 mm SL (one day after collection); Brazil: Acre: Porto do Acre: Rio Purus basin.
FIGURE 2. Prorivulus auriferus, UFRJ 5933 in A new killifish genus and species from the coastal plains of northeastern Brazil (Teleostei: Cyprinodontiformes: Rivulidae)
FIGURE 2. Prorivulus auriferus, UFRJ 5933, female, paratype, 22.9 mm SL (two weeks after collection); Brazil: Bahia: Valença.
FIGURE 1. Prorivulus auriferus, UFRJ 5932 in A new killifish genus and species from the coastal plains of northeastern Brazil (Teleostei: Cyprinodontiformes: Rivulidae)
FIGURE 1. Prorivulus auriferus, UFRJ 5932, male, holotype, 30.3 mm SL (two weeks after collection); Brazil: Bahia: Valença.
FIGURE 1. Simpsonichthys radiosus, UFRJ 6017 in Simpsonichthys radiosus sp. n. (Teleostei: Cyprinodontiformes: Rivulidae): a new annual killifish from the upper Rio Tocantins basin, central Brazil
FIGURE 1. Simpsonichthys radiosus, UFRJ 6017, male, holotype, 23.4 mm SL (10 days after collection); Brazil: Goiás: Formosa: upper Rio Tocantins basin.
FIGURE 3 in Rivulus uatuman sp. n. (Teleostei: Cyprinodontiformes: Rivul idae): a new miniature killifish from the central Brazilian Amazon
FIGURE 3. Brazil: Amazonas: Balbina: FIGURE 4. Brazil: Amazonas: Balbina: Rio Rio Uatumã basin; general view of the type Uatumã basin; detailed view of the type locality locality of Rivulus uakti. of Rivulus uakti.
FIGURE 1. Rivulus uatuman, UFRJ 6022 in Rivulus uatuman sp. n. (Teleostei: Cyprinodontiformes: Rivul idae): a new miniature killifish from the central Brazilian Amazon
FIGURE 1. Rivulus uatuman, UFRJ 6022, male, FIGURE 2. Rivulus uatuman, UFRJ holotype, 16.6 mm SL (one day after collection); 6023, female, paratype, 16.1 mm SL (one Brazil: Amazonas: Balbina: Rio Uatumã basin. day after collection); Brazil: Amazonas:
FIGURE 2. Simpsonichthys radiosus, UFRJ 6018 in Simpsonichthys radiosus sp. n. (Teleostei: Cyprinodontiformes: Rivulidae): a new annual killifish from the upper Rio Tocantins basin, central Brazil
FIGURE 2. Simpsonichthys radiosus, UFRJ 6018, female, paratype, 23.5 mm SL (10 days after collection); Brazil: Goiás: Formosa: upper Rio Tocantins basin.
Figure 11 in Monophyly and taxonomy of the Neotropical seasonal killifish genus Leptolebias (Teleostei: Aplocheiloidei: Rivulidae), with the description of a new genus
Figure 11. Notholebias minimus, male, not preserved, about 20-mm standard length (1 day after collection); Brazil, Estado do Rio de Janeiro, Seropédica (photo by W. J. E. M. Costa).
Figure 8. Leptolebias itanhaensis, UFRJ 6453 in Monophyly and taxonomy of the Neotropical seasonal killifish genus Leptolebias (Teleostei: Aplocheiloidei: Rivulidae), with the description of a new genus
Figure 8. Leptolebias itanhaensis, UFRJ 6453, male, holotype, 20.7-mm standard length (some hours after collection); Brazil, Estado de São Paulo, Itanhaém (photo by W. J. E. M. Costa).
Figure 7. Leptolebias aureoguttatus, UFRJ 6331 in Monophyly and taxonomy of the Neotropical seasonal killifish genus Leptolebias (Teleostei: Aplocheiloidei: Rivulidae), with the description of a new genus
Figure 7. Leptolebias aureoguttatus, UFRJ 6331, female, 16.5-mm standard length (some hours after collection); Brazil, Estado do Paraná, Praia de Leste (photo by W. J. E. M. Costa).
Figure 4 in Monophyly and taxonomy of the Neotropical seasonal killifish genus Leptolebias (Teleostei: Aplocheiloidei: Rivulidae), with the description of a new genus
Figure 4. Geographical distribution of Leptolebias in São Paulo and Paraná states, southern Brazil: L. aureoguttatus (•) and L. itanhaensis (Ɨ).
Figure 3 in Monophyly and taxonomy of the Neotropical seasonal killifish genus Leptolebias (Teleostei: Aplocheiloidei: Rivulidae), with the description of a new genus
Figure 3. Osteological features in Leptolebias and Notholebias: A, medial portion of hyoid and branchial skeleton, dorsal view, of Leptolebias citrinipinnis. B, medial portion of hyoid and branchial skeleton, dorsal view, of Notholebias fractifasciatus. C, anguloarticular region, left side, lateral view, of L. citrinipinnis. D, jaw suspensorium, left side, lateral view, of N. fractifasciatus. Abbreviations: AA, anguloarticular; B1–B3, basibranchials 1–3; BB, basibranchial cartilage; BC, basihyal cartilage; BH, basihyal; H1–H3, hypobranchials 1–3; HY, hyomandibula; MS, mesopterygoid; MT, metapterygoid; PL, autopalatine; PO, preopercle; QU, quadrate; RA, retroarticular; SY, sympletic. Larger stippling indicates cartilage. Scale bar: 1 mm.
Figure 1. Most parsimonious phylogeny among 12 in Monophyly and taxonomy of the Neotropical seasonal killifish genus Leptolebias (Teleostei: Aplocheiloidei: Rivulidae), with the description of a new genus
Figure 1. Most parsimonious phylogeny among 12 species of the Rivulidae (tree length, L = 118; consistency index, CI = 0.82; retention index, RI = 0.85). Numbers above branches are bootstrap values.
Figure 2 in Monophyly and taxonomy of the Neotropical seasonal killifish genus Leptolebias (Teleostei: Aplocheiloidei: Rivulidae), with the description of a new genus
Figure 2. Frontal squamation and neuromast pattern in Leptolebias aureoguttatus. Abbreviations: A–H, frontal scales A–H; AIS, anterior infraorbital series; AN, anterior nostril; ARN, anterior rostral neuromast; ASN, anterior supraorbital neuromast; PAS, parietal series; PBS, preorbital series; PN, posterior nostril; PRN, posterior rostral neuromast; PSS, posterior supraorbital series. Scale bar: 1 mm.
Figure 5 in Monophyly and taxonomy of the Neotropical seasonal killifish genus Leptolebias (Teleostei: Aplocheiloidei: Rivulidae), with the description of a new genus
Figure 5. Geographical distribution of Leptolebias in Rio de Janeiro state, south-eastern Brazil: 1, L. marmoratus, L. splendens, and L. opalescens; 2, L. marmoratus and L. opalescens; 3, L. splendens; 4, L. citrinipinnis.
Figure 10 in Monophyly and taxonomy of the Neotropical seasonal killifish genus Leptolebias (Teleostei: Aplocheiloidei: Rivulidae), with the description of a new genus
Figure 10. Leptolebias itanhaensis, male, not preserved; Brazil, Estado de São Paulo, Itanhaém (photo by G. C. Brazil).
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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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.