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140 results for “Perch”
Figure 1 in Diverging structures, perch heights, temperatures, and levels of sunlight of spatial niche dimensions ease the syntopic life of Tropidurus hispidus and Tropidurus semitaeniatus (Squamata: Tropiduridae)
Figure 1. Ordination by non-metric multidimensional scaling comparing proportions of leaf litter, sand, vegetation, and rock between (a) Tropidurus semitaeniatus (×) and environmental availability (∆) (stress = 0.1534), and (b) Tropidurus hispidus (○) and environmental availability (∆) (stress = 0.0877). Proximity and distance between points indicates, respectively, similarity or dissimilarity.
Figure 4 in Diverging structures, perch heights, temperatures, and levels of sunlight of spatial niche dimensions ease the syntopic life of Tropidurus hispidus and Tropidurus semitaeniatus (Squamata: Tropiduridae)
Figure 4. Differences in distances from nearest potential shelters (cm, log) among types of shelter for Tropidurus semitaeniatus. The mean distance was longer from vegetation than from rock shelters. Upwards, the horizontal lines of the boxplots represent the minimum range, first quartile, median, third quartile, and maximum range. The unit of the original measurement scale is presented for the logarithmic values of the vertical axis.
Figure 2 in Diverging structures, perch heights, temperatures, and levels of sunlight of spatial niche dimensions ease the syntopic life of Tropidurus hispidus and Tropidurus semitaeniatus (Squamata: Tropiduridae)
Figure 2. Ordination by non-metric multidimensional scaling comparing proportions of shade, filtered sunlight, and full sunlight, air temperatures and substrate temperatures between (a) Tropidurus hispidus (○) and T. semitaeniatus (×) (stress = 0.1785), (b) T. hispidus (○) and environmental availability (∆) (stress = 0.1004), and (C) T. semitaeniatus (×) and that available in the environment (∆) (stress = 0.2534). Proximity and distance between points indicates, respectively, similarity or dissimilarity.
Figure 5 in Diverging structures, perch heights, temperatures, and levels of sunlight of spatial niche dimensions ease the syntopic life of Tropidurus hispidus and Tropidurus semitaeniatus (Squamata: Tropiduridae)
Figure 5. Frequency distribution (horizontal axis; in %) of perch heights (vertical axes; in cm) used by Tropidurus hispidus and Tropidurus semitaeniatus.
Larval yellow perch locations during locomotion assays after exposure to MeHg and PCB126
<p>Fish swimming behavior is a commonly measured response in aquatic ecotoxicology because behavior is considered a whole organism-level effect that integrates many sensory systems. Recent advancements in animal behavior models, such as hidden Markov chain models (HMM), suggest an improved analytical approach for toxicology. Using both new and traditional approaches, we examined the sublethal effects of PCB126 and methylmercury on yellow perch (YP) larvae (<em>Perca flavescens</em>) using three doses. Both approaches indicate larvae increase activity after exposure to either chemical. The middle methylmercury-dosed larvae showed multiple altered behavior patterns. First, larvae had a general increase in activity, typically performing more behavior states, more time swimming, and more swimming bouts per second. Second, when larvae were in a slow or medium swimming state, these larvae tended to switch between these states more often. Third, larvae swam slower during the swimming bouts. The upper PCB126-dosed larvae exhibited a higher proportion and a fast swimming state, but the total time spent swimming fast decreased. The middle PCB126-dosed larvae transitioned from fast to slow swimming states less often than the control larvae. These results indicate that developmental exposure to very low doses of these neurotoxicants alters YP larvae overall swimming behaviors, suggesting neurodevelopment alteration.</p>
Figure 5 in Evidence for vocal diversity during physical interference at the perch in sympatric Carollia species (Chiroptera: Phyllostomidae): a key to social organization and species coexistence?
Figure 5. Cluster analysis of class usage per dyad during physical interference at the perch, based on Euclidean distances. Each symbol represents a specific dyad. The x-axis represents the three clusters set by k-means clustering to which a given dyad was sorted; the y-axis represents the species to which a given dyad belonged, and the z-axis represents the relative distances of each dyad from the respective cluster centre. Dyad sex composition (passive bat is given second) is indicated by different symbols, with the sex of the passive bat indicated by different colours (in red–pink dyads, the passive bat is female; in blue–turquoise dyads it is male). Note that most dyads of a given species grouped in a specific cluster, whereas no clear pattern was found for dyad sex composition or sex of the passive bat.
Figure 4 in Evidence for vocal diversity during physical interference at the perch in sympatric Carollia species (Chiroptera: Phyllostomidae): a key to social organization and species coexistence?
Figure 4. The frequency of occurrence of a class across interactions is represented by different colours for Carollia castanea (Cc), Carollia sowelli (Cs) and Carollia perspicillata (Cp). Of the 21 classes discriminated, 20 occurred in C. castanea, 12 in C. perspicillata and five in C. sowelli. The high vocal variability of C. castanea is highlighted by the presence of six rarely occurring classes specific for this species, summarized as other. Please note that class dms, selected for comparative analyses, occurred frequently across all species.
Figure 3 in Evidence for vocal diversity during physical interference at the perch in sympatric Carollia species (Chiroptera: Phyllostomidae): a key to social organization and species coexistence?
Figure 3. Oscillograms (upper panels) and sonagrams (lower panels) representing down-sweeps (sensu Knörnschild et al., 2013) emitted by the three sympatric Carollia species present at Hitoy Cerere, Costa Rica. A, C, E, parts of a dms bout of Carollia castanea (A), a dms bout of Carollia sowelli (C) and a dms bout of Carollia perspicillata (E) are given. B, D, F, for comparison, two ds syllables of C. castanea (B), two of C. sowelli (D) and four of C. perspicillata (F) are shown. Note that syllable durations and time intervals between syllables are quasi-constant within dms bouts and more variable for sequences of ds syllables.
Figure 2 in Evidence for vocal diversity during physical interference at the perch in sympatric Carollia species (Chiroptera: Phyllostomidae): a key to social organization and species coexistence?
Figure 2. Oscillograms (upper panels) showing the relative amplitude (rel. amp.) and sonagrams (lower panels) representing typical frequency–time contours of vocalization classes associated with the social interaction of Carollia bats landing on, grabbing or hanging on a perched conspecific: warbles (A), down-sweep-warble (B), U (C), sinus (D), convex downwardmodulated (E), a dms syllable followed by upward-modulated-sweep (F), other_6 (G), other_1 (H) followed by other_2 (I), U-warbles (J), shallow-U (K), other_3 (L) followed by flat-down-sweep (M), sinus-warble (N) and other_4 (O). A and B are examples from Carollia perspicillata; other examples are from Carollia castanea.
Figure 1 in Evidence for vocal diversity during physical interference at the perch in sympatric Carollia species (Chiroptera: Phyllostomidae): a key to social organization and species coexistence?
Figure 1. Phylogenetic tree for species of the genus Carollia. Genus Rhinophylla served as an outgroup. The numbers above branches are posterior probability estimations. Note how the individuals of the study cluster together in the correct species. Carollia perspicillata are indicated in orange, Carollia sowelli in green and Carollia castanea in yellow.
Figure 6 in Evidence for vocal diversity during physical interference at the perch in sympatric Carollia species (Chiroptera: Phyllostomidae): a key to social organization and species coexistence?
Figure 6. Species discrimination based on a discriminant function analysis of acoustic parameters of dms syllables. Median values for each dyad were used in the analysis. The two discriminant functions (DF1 and DF2) are given with the percentage of variance explained. Carollia castanea (Cc) is represented by circles, Carollia sowelli (Cs) by triangles and Carollia perspicillata (Cp) by squares. The corresponding centroids are shown with a bigger symbol. For each species, 95% confidence ellipses are also plotted.
Supplementary data for "Crawling, Climbing, Perching, and Flying by FiBa Soft Robots"
<p>Supplementary Information for paper "Crawling, climbing, perching, and flying by FiBa soft robots". <a href="https://doi-org.ezp-prod1.hul.harvard.edu/10.1126/scirobotics.adk4533">DOI: 10.1126/scirobotics.adk4533</a> </p>
FIGURE 1 in Grammatonotus bianchi, a new species of splendid perch (Percoidei: Callanthiidae) from Myanmar, northeastern Indian Ocean
FIGURE 1. Localities of Grammatonotus spp. within the Indian Ocean. Orange markers represents G. bianchi sp. nov.; white triangle G. lanceolatus; white square G. sp.1 (Mascarenes); and white star G. sp. 2 (Mozambique).
FIGURE 3 in Grammatonotus bianchi, a new species of splendid perch (Percoidei: Callanthiidae) from Myanmar, northeastern Indian Ocean
FIGURE 3. Radiograph of Grammatonotus bianchi sp. nov. Holotype, SAIAB 208486, 68.7 mm SL (a–c); a: whole specimen in lateral view; b: close-up illustrating the configurations of supraneural bones (sn), anterior neural spines (ns), and anterior dorsal pterygiophore (pt); c: close-up of caudal skeleton where: (epu) epuralia, (hp) hypurals, (npu-2) neural process, (ph) parhypurale, (un) uroneurale (images by Mark Lisher & Nkosinathi Mazungula).
FIGURE 2 in Grammatonotus bianchi, a new species of splendid perch (Percoidei: Callanthiidae) from Myanmar, northeastern Indian Ocean
FIGURE 2. Fresh coloration of Grammatonotus bianchi sp. nov. shortly after collection: (a) Holotype, SAIAB 208486, 68.7 mm SL (photo by P.N. Psomadakis); (b) Specimen collected in 2015, 121 mm TL (photo by O. Alvheim) for which voucher is unavailable (specimen lost).
Do I stay or do I go? Shifts in perch use by lizards during twilight suggests anticipatory behaviour
<p>Anticipatory behaviour is the expectation of a near-future event based on information processed in the past and influences an animal's tactical decisions, particularly when there are significant fitness consequences. The grass lizard (<i>Takydromus viridipunctatus</i>) perches on blades of grass at night which likely reduces the probability of predation by terrestrial predators such as snakes, rodents, and shrews. During twilight (starting 30 mins before sunrise) they move from above the grass to within grass clumps and this is thought to afford the lizard protection while reducing detection by avian predators. Here, we examined how lizards shift their behaviour as a function of visual detectability to their primary predator, the cattle egret (<i>Bubulcus ibis</i>). We show that the lizards shift from their perch site during twilight at the earliest time at which egrets depart communal roosts. At the same time, visual modelling shows a dramatic increase in detectability of the lizards to the visual system of egrets. Therefore, anticipatory behaviour in response to environmental cues acts to reduce predation risk as lizards become more conspicuous and predators become more active. Grass lizard anticipatory behaviour appears to be finely tuned by natural selection to adjust to temporal changes in predation risk.</p>
Fig. 1 in Records of Perching by Dung Beetles (Coleoptera: Scarabaeidae: Scarabaeinae) in the Northeastern Atlantic Forest of Brazil
Fig. 1. Dung beetles perching on leaves in northeastern Brazilian Atlantic Forest remnants. A) Canthon staigi; B) Canthidium sp. 1; C) Canthidium sp. 2. Photographs by Hugo Neves (A), Rafael Barros (B), and Adriano DeSouza (C).
Figure 6 in Newly Described Coccidia Goussia Bayae From White Perch Morone Americana: Morphology And Phylogenetics Support Emerging Taxonomy Of Goussia Within Piscine Hosts
Figure 6. Bayesian phylogenetic relationships of partitioned 18S rDNA and cytochrome oxidase 1 (COI). Posterior probability is indicated at branch sites. Toxoplasma gondii served as an outgroup. Accession numbers follow species names in parentheses (18S rDNA, COI).
Figure 5 in Newly Described Coccidia Goussia Bayae From White Perch Morone Americana: Morphology And Phylogenetics Support Emerging Taxonomy Of Goussia Within Piscine Hosts
Figure 5. Bayesian phylogenetic relationships of fish-infecting Goussia and Choleoeimeria spp. based on partial 18S rDNA. Selected sequences represent different morphology types (epicellular, leucisci, dispersed, and nodular) defined by Rosenthal et al. (2016). Hammondia hammondi was used as an outgroup. Posterior probability is indicated at branch sites. Accession numbers follow species names in parentheses.
Figure 4 in Newly Described Coccidia Goussia Bayae From White Perch Morone Americana: Morphology And Phylogenetics Support Emerging Taxonomy Of Goussia Within Piscine Hosts
Figure 4. Light micrographs of coccidia of Goussia bayae n. sp. in hepatic bile ducts of white perch, Morone americana. (A) Developing stages of coccidia epicellular to biliary epithelium. (B) Microgamont (Mi), macrogamont (Ma), and meront (Me) along epithelium. (C) Longitudinal view of bile duct with developing coccidia along epithelium (arrow) and sporulating oocysts (O) in lumen. (D). Cross-section of enlarged bile duct with numerous developing and mature coccidia.
ScienceDex guides
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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.