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107 results for “Cavefish”
FIGURE 3 in A new cavefish species from Southwest China, Sinocyclocheilus gracilicaudatus sp. nov. (Teleostei: Cypriniformes: Cyprinidae)
FIGURE 3. Comparison of caudal peduncle depth vs caudal peduncle length between Sinocyclocheilus gracilicaudatus sp. nov. (×) and S. donglanensis (○).
FIGURE 4 in A new cavefish species from Southwest China, Sinocyclocheilus gracilicaudatus sp. nov. (Teleostei: Cypriniformes: Cyprinidae)
FIGURE 4. Comparison of eye diameter relative to standard length between Sinocyclocheilus gracilicaudatus sp. nov. (×) and S. donglanensis (○).
FIGURE 1 in A new cavefish species from Southwest China, Sinocyclocheilus gracilicaudatus sp. nov. (Teleostei: Cypriniformes: Cyprinidae)
FIGURE 1. Sinocyclocheilus gracilicaudatus sp. nov. Holotype 186399, ASIZB, 94.7mm SL, scale bar 10mm
FIGURE 6 in A new cavefish species from Southwest China, Sinocyclocheilus gracilicaudatus sp. nov. (Teleostei: Cypriniformes: Cyprinidae)
FIGURE 6. Principal component analysis based on morphometric characters of Sinocyclocheilus gracilicaudatus sp. nov. (●) and S. donglanensis (○).
FIGURE 5 in A new cavefish species from Southwest China, Sinocyclocheilus gracilicaudatus sp. nov. (Teleostei: Cypriniformes: Cyprinidae)
FIGURE 5. Comparison of maxilla-barbel length and rictal barbel length relative to standard length for Sinocyclocheilus gracilicaudatus sp. nov. (×) and S. donglanensis (○).
Kinematic analysis of social interactions deconstructs the evolved loss of schooling behavior in cavefish
<p>Video tracking software (<a href="https://zenodo.org/api/files/cfb2f8f7-ecb0-4ef8-a16c-3f50e620549c/trilab-tracker-0.2.0.zip?versionId=ec71e34e-8049-450e-b00e-102d67cc3a43">trilab-tracker-0.2.0.zip</a>) and dataset (<a href="https://zenodo.org/api/files/cfb2f8f7-ecb0-4ef8-a16c-3f50e620549c/dataset.zip?versionId=025b9b87-2b06-4012-adb3-cd1b508d5bd1">dataset.zip</a>) for the research article "Kinematic analysis of social interactions deconstructs the evolved loss of schooling behavior in cavefish". The latest version of Trilab-Tracker can be found at <a href="https://github.com/yffily/trilab-tracker">https://github.com/yffily/trilab-tracker</a>.</p>
Hybridization underlies localized trait evolution in cavefish
<p>A rapidly growing body of work has demonstrated that introgressive hybridization often drives patterns of phenotypic evolution and may play an integral role in the evolutionary processes of local adaptation and speciation. Indeed, several of studies have shown that behavioral variation can result from introgressive hybridization (e.g., song in hybrid Darwin's finches, mate choice in hybrid baboons, defensive behavior in hybrid honey bees), providing new substrate for selection to act upon. A powerful model system for investigating the genetic and evolutionary basis of trait development and behavior is the Mexican tetra, <i>Astyanax mexicanus</i>. Cave populations have repeatedly evolved numerous traits including eye loss, sleep loss, and albinism. Of the 30 caves inhabited by <i>A. mexicanus</i>, the Chica cave is unique because it contains several pool microenvironments inhabited by putative hybrids between surface and cave populations, providing an opportunity to investigate hybridization and its impact on complex trait evolution. We demonstrate that hybridization between cave and surface populations contributes to highly localized variation in pigmentation, eye development, and sleep, traits that are thought to be associated with cave evolution. Our findings suggest that hybridization drives highly-localized behavioral and morphological evolution. Lastly, our analyses uncovered a compelling example of convergent evolution in a core circadian clock gene in multiple independent cavefish lineages and burrowing mammals, suggesting a shared genetic mechanism underlying circadian disruption in subterranean vertebrates. Together, our results provide insight into the evolutionary mechanisms that generate adaptive genetic variation. </p>
FIGURE 3 in Speolabeo hokhanhi, a new cavefish from Central Vietnam (Teleostei: Cyprinidae)
FIGURE 3. Oromandibular structures in Speolabeo hokhanhi sp. nov.; lj, lower jaw; ll, lower lip; mb, maxillary barbel; pg, postlabial groove; rb, rostral barbel; rf, rostral fold; ul, upper lip; uj, upper jaw.
FIGURE 1 in Speolabeo hokhanhi, a new cavefish from Central Vietnam (Teleostei: Cyprinidae)
FIGURE 1. Lateral view of Speolabeo hokhanhi, IHB 2016092883, holotype 74.6 mm SL; central Vietnam, Son River basin, Hang Va Cave.
FIGURE 5 in Speolabeo hokhanhi, a new cavefish from Central Vietnam (Teleostei: Cyprinidae)
FIGURE 5. Vietnam: Son River basin: Hang Va Cave. a) habitat of Speolabeo hokhanhi, b) the pool where type specimens were collected.
FIGURE 5 in Sinocyclocheilus brevifinus (Teleostei: Cyprinidae), a new species of cavefish from Guangxi, China
FIGURE 5. Type locality of Sinocyclocheilus brevifinus. Upper, general area near outlet. Lower, spring fed area where species was found.
FIGURE 3 in Sinocyclocheilus brevifinus (Teleostei: Cyprinidae), a new species of cavefish from Guangxi, China
FIGURE 3. Species presumed to be closely related to Sinocyclocheilus brevifinus sp. nov. a) S. guilinensis b) S. jii c) S. huangtianensis d) S. gracilis.
FIGURE 4 in Sinocyclocheilus brevifinus (Teleostei: Cyprinidae), a new species of cavefish from Guangxi, China
FIGURE 4. Distribution of Sinocyclocheilus brevifinus sp. nov. and related species. ▲ S. brevifinus sp. nov., + S. macrolepis, ★ S. yishanensis, ● S. jii, ■ S. huangtianensis,•S.guilinensis, and ♦ S.gracilis
FIGURE 2 in Sinocyclocheilus brevifinus (Teleostei: Cyprinidae), a new species of cavefish from Guangxi, China
FIGURE 2. Sinocyclocheilus brevifinus sp. nov. a) Lateral view of holotype, PRFRI2012001, 111.1 mm SL. China, Guangxi Zhuang Autonomous Region, Wanggao, Zhujiang Basin, Hejiang drainage; "b) Live specimen of" Sinocyclocheilus brevifinus sp. nov. from same locality.
FIGURE 6 in Sinocyclocheilus brevifinus (Teleostei: Cyprinidae), a new species of cavefish from Guangxi, China
FIGURE 6. Results from principal component analysis of mensural characters for PC2 and PC3, illustrating distinctiveness of S. brevifinus from relatives S.gracilis, S.guilinensis, S. huangtianensis, and S. jii.
Selection-driven trait loss in independently evolved cavefish populations
<p>Laboratory studies have demonstrated that a single phenotype can be produced by many different genotypes; however, in natural systems, it is frequently found that phenotypic convergence is due to parallel genetic changes. This suggests a substantial role for constraint and determinism in evolution and indicates that certain mutations are more likely to contribute to phenotypic evolution. Here we use whole-genome resequencing in the Mexican tetra, <em>Astyanax</em> <em>mexicanus</em>, to investigate how selection has shaped the repeated evolution of both trait loss and enhancement across independent cavefish lineages. We show that selection on standing genetic variation and de novo mutations both contribute substantially to repeated adaptation. Our findings provide empirical support for the hypothesis that genes with larger mutational targets are more likely to be the substrate of repeated evolution and indicate that features of the cave environment may impact the rate at which mutations occur.</p>
Dataset: Metabolic shift toward ketosis in asocial cavefish increases social-like affinity -2
<p>This is a video dataset 2 for the publication at BMC Biology 2023 whose summary is: </p> <p>Background:<br> Social affinity and collective behavior are nearly ubiquitous in the animal kingdom, but many lineages feature evolutionarily asocial species. These solitary species may have evolved to conserve energy in food-sparse environments. However, the mechanism by which metabolic shifts regulate social affinity is not well investigated.</p> <p>Results:<br> In this study, we used the Mexican tetra (Astyanax mexicanus), which features riverine sighted surface (surface fish) and cave-dwelling populations (cavefish), to address the impact of metabolic shifts on asociality and other cave-associated behaviors in cavefish, including repetitive turning, sleeplessness, swimming longer distances, and enhanced foraging behavior. After one month of ketosis-inducing ketogenic diet feeding, asocial cavefish exhibited significantly higher social affinity, whereas social affinity regressed in cavefish fed the standard diet. The ketogenic diet also reduced repetitive turning and swimming in cavefish. No major behavioral shifts were found regarding sleeplessness and foraging behavior, suggesting that other evolved behaviors are not largely regulated by ketosis. We further examined the effects of the ketogenic diet via supplementation with exogenous ketone bodies, revealing that ketone bodies are pivotal molecules positively associated with social affinity.</p> <p>Conclusions:<br> Our study indicated that fish that evolved to be asocial remain capable of exhibiting social affinity under ketosis, possibly linking the seasonal food availability and sociality.</p>
Dataset: Metabolic shift toward ketosis in asocial cavefish increases social-like affinity -1
<p>These are video dataset 1 for the publication at BMC Biology 2023 whose summary is: </p> <p>Background:</p> <p>Social affinity and collective behavior are nearly ubiquitous in the animal kingdom, but many lineages feature evolutionarily asocial species. These solitary species may have evolved to conserve energy in food-sparse environments. However, the mechanism by which metabolic shifts regulate social affinity is not well investigated.</p> <p>Results:</p> <p>In this study, we used the Mexican tetra (<em>Astyanax mexicanus</em>), which features riverine sighted surface (surface fish) and cave-dwelling populations (cavefish), to address the impact of metabolic shifts on asociality and other cave-associated behaviors in cavefish, including repetitive turning, sleeplessness, swimming longer distances, and enhanced foraging behavior. After one month of ketosis-inducing ketogenic diet feeding, asocial cavefish exhibited significantly higher social affinity, whereas social affinity regressed in cavefish fed the standard diet. The ketogenic diet also reduced repetitive turning and swimming in cavefish. No major behavioral shifts were found regarding sleeplessness and foraging behavior, suggesting that other evolved behaviors are not largely regulated by ketosis. We further examined the effects of the ketogenic diet via supplementation with exogenous ketone bodies, revealing that ketone bodies are pivotal molecules positively associated with social affinity.</p> <p>Conclusions:</p> <p>Our study indicated that fish that evolved to be asocial remain capable of exhibiting social affinity under ketosis, possibly linking the seasonal food availability and sociality.</p>
Data from: Effects of climatic and geological processes during the Pleistocene on the evolutionary history of the northern cavefish, Amblyopsis spelaea (Teleostei: Amblyopsidae)
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Hybridization underlies localized trait evolution in cavefish
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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.