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131 results for “Semi-aquatic”
FIGURE 2 in Taxonomic revision of the semi-aquatic skink Parvoscincus leucospilos (Reptilia: Squamata: Scincidae), with description of three new species
FIGURE 2. Partitioned Bayesian majority rule consensus estimate of molecular phylogeny from the concatenated (ND2 + PTGER4) data of Parvoscincus. Populations within the P. leucospilos Complex are genetically unique and are diagnosed as new species based on morphological differences. Black circles label nodes with posterior probabilities above 0.95.
FIGURE 4 in Taxonomic revision of the semi-aquatic skink Parvoscincus leucospilos (Reptilia: Squamata: Scincidae), with description of three new species
FIGURE 4. Photographs of heads from dorsal and lateral perspectives to show pigmentation and scale pattern variation among species. With the exception of P. leucospilos (KU 313870), all photographs are of the holotypes of the new species.
FIGURE 1 in Taxonomic revision of the semi-aquatic skink Parvoscincus leucospilos (Reptilia: Squamata: Scincidae), with description of three new species
FIGURE 1. Map of the Luzon Island, Philippines, showing the collection localities for the new species and P. leucospilos.
FIGURE 3 in Taxonomic revision of the semi-aquatic skink Parvoscincus leucospilos (Reptilia: Squamata: Scincidae), with description of three new species
FIGURE 3. Dorsal views of representative specimen heads and flanks, exhibiting pigmentation pattern variation among species.
FIGURE 5 in Taxonomic revision of the semi-aquatic skink Parvoscincus leucospilos (Reptilia: Squamata: Scincidae), with description of three new species
FIGURE 5. Photographs in life of (A) P. leucospilos (Mt. Banahao; TNHC 62683); (B) P. leucospilos (Angat Watershed; KU 329388); (C) P. manananggalae sp. nov. (PNM 9794); and (D) P. tikbalangi sp. nov. (Holotype; PNM 9795).
Supplementary material 1 from: Boda P, Bozóki T, Vásárhelyi T, Bakonyi G, Várbíró G (2015) Revised and annotated checklist of aquatic and semi-aquatic Heteroptera of Hungary with comments on biodiversity patterns. ZooKeys 501: 89-108. https://doi.org/10.3897/zookeys.501.8964
Checklist of aquatic and semi-aquatic Heteroptera (Heteroptera: Nepomorpha, Gerromorpha) occurred in Hungary, and the neighbouring countries:
Myoglobin primary structure reveals multiple convergent transitions to semi-aquatic life in the world's smallest mammalian divers
<p>Identifying the phylogenomic underpinnings of specialized phenotypes that fueled evolutionary transitions into new adaptive zones is central to evolutionary biology. The order Eulipotyphla (e.g., moles, shrews, and hedgehogs) is ideally suited to address this question as semi-fossorial, fossorial, and semi-aquatic forms have repeatedly arisen from terrestrial forbearers. However, our understanding of the ecomorphological pathways leading to these diverse lifestyles has been confounded by a fragmentary fossil record and potential morphological convergence. The net surface charge of myoglobin (<i>Z</i><sub>Mb</sub>) is readily determined from its primary structure and provides an objective target to map ancient evolutionary transitions due to mechanistic linkages of <i>Z</i><sub>Mb</sub> with myoglobin concentration. Myoglobin facilitates O<sub>2</sub> storage and transport in muscle and its concentration is sharply elevated in breath-hold divers relative to terrestrial mammals, with fossorial and high-elevation species only showing minor increases. Here we trace the evolution of <i>Z</i><sub>Mb</sub> to unravel the history of lifestyle transitions in the clade containing the world's smallest endothermic divers. We first constructed a comprehensive phylogeny that resolved previously intractable intra-family relationships, and confirmed that <i>Z</i><sub>Mb</sub> accurately predicts aquatic habits within Eulipotyphla. Ancestral reconstructions of <i>Z</i><sub>Mb</sub>, which included representatives from all seven recognized semi-aquatic genera, provide key insights into the timing and mode of adaptations that underpin the evolution of the diverse ecomorphotypes within Eulipotyphla, and unambiguously revealed that semi-aquatic lifestyles evolved twice in moles, and three times in shrews. Our phylogenetically informed analysis supports <i>Z</i><sub>Mb</sub> as an effective tool to trace ancient secondary aquatic transitions of mammals based on protein sequence alone.</p>
Figure 2 in Local habitat preferences of a semi-aquatic mammal, the Pyrenean desman Galemys pyrenaicus
Figure 2: Explanatory power (% of deviance explained) of GLMs relating the number of Pyrenean desman faeces to a single category of abiotic or biotic variables ("models by category"). See Table 1 for details about the variables belonging to each category.
Myoglobin primary structure reveals multiple convergent transitions to semi-aquatic life in the world's smallest mammalian divers
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Data from: A pipeline for metabarcoding and diet analysis from fecal samples developed for a small semi-aquatic mammal
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Data from: Degradation of key photosynthetic genes in the critically endangered semi-aquatic flowering plant Saniculiphyllum guangxiense (Saxifragaceae)
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Data from: Molecular data and ecological niche modeling reveal the Pleistocene history of a semi-aquatic bug (Microvelia douglasi douglasi) in East Asia
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Relationships between survival and habitat suitability of semi-aquatic mammals
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Figure 4 in Spatial patterns of the semi-aquatic rodent Nectomys squamipes in Atlantic forest streams
Figure 4. Linear regressions between body weight (g) and home length (m) for 29 individuals of Nectomys squamipes analysed through capture–mark–recapture (CMR). Black circles represent males and grey circles represent females. The top line represents the linear regression for males, while the bottom and dotted line represents the linear regression for females. The regression equations are presented on the figure. HL = home length; BWeight = body weight.
Figure 2 in Spatial patterns of the semi-aquatic rodent Nectomys squamipes in Atlantic forest streams
Figure 2. Geometric regression curve between river/tributary width (m) and Nectomys squamipes trapping success (%). The regression equation is presented on the figure. TS = trapping success.
Figure 1 in Spatial patterns of the semi-aquatic rodent Nectomys squamipes in Atlantic forest streams
Figure 1. Study area, in Rio de Janeiro state, Brazil. Tg 1 and Tg 2 are tributaries of Águas Claras River; Tf 1 and Tf 2 are tributaries of Floresta River.
Figure 3 in Spatial patterns of the semi-aquatic rodent Nectomys squamipes in Atlantic forest streams
Figure 3. Home length and home range (MCP) for four males (R-M) and one female (R-F) of Nectomys squamipes monitored through radio tracking and capture–mark–recapture.
Figure 5 in Spatial patterns of the semi-aquatic rodent Nectomys squamipes in Atlantic forest streams
Figure 5. Box plots of distance between successive captures (DSC) for 64 individuals of Nectomys squamipes studied using capture–mark–recapture (CMR). (a) Males' DSC between seasons; (b) females' DSCs between seasons. The middle line on boxes represents the median; the bottom and top of the boxes represent the first and the third quartiles; the whiskers extend to no more than 1.5 times the interquartile range from the boxes or to the extreme data point. Numbers in parentheses are the sample sizes for each sample group.
Data from: Diversity in morphology and locomotory behavior is associated with niche expansion in the semi-aquatic bugs
Acquisition of new ecological opportunities is a major driver of adaptation and species diversification [ 1–4 ]. However, how groups of organisms expand their habitat range is often unclear [ 3 ]. We study the Gerromorpha, a monophyletic group of heteropteran insects that occupy a large variety of water surface-associated niches, from small puddles to open oceans [ 5, 6 ]. Due to constraints related to fluid dynamics [ 7–9 ] and exposure to predation [ 5, 10 ], we hypothesize that selection will favor high speed of locomotion in the Gerromorpha that occupy water-air interface niches relative to the ancestral terrestrial life style. Through biomechanical assays and phylogenetic reconstruction, we show that only species that occupy water surface niches can generate high maximum speeds. Basally branching lineages with ancestral mode of locomotion, consisting of tripod gait, achieved increased speed on the water through increasing midleg length, stroke amplitude, and stroke frequency. Derived lineages evolved rowing as a novel mode of locomotion through simultaneous sculling motion almost exclusively of the midlegs. We demonstrate that this change in locomotory behavior significantly reduced the requirement for high stroke frequency and energy expenditure. Furthermore, we show how the evolution of rowing, by reducing stroke frequency, may have eliminated the constraint on body size, which may explain the evolution of larger Gerromorpha. This correlation between the diversity in locomotion behaviors and niche specialization suggests that changes in morphology and behavior may facilitate the invasion and diversification in novel environments.
Data from: Early evolution of the ossicular chain in Cetacea: into the middle ear gears of a semi-aquatic protocetid whale
Modifications of the morphology and acoustic properties of the ossicular chain are among the major changes that accompanied the adaptation of Cetacea to the aquatic environment. Thus, data on the middle ear ossicles of early whales are crucial clues to understand the first steps of the emblematic terrestrial/aquatic transition that occurred in that group. Yet, the delicate nature and very small size of these bones make their preservation in the fossil record extremely rare. Due to the scarcity of available data, major questions remain concerning the sound transmission pathways in early non-fully aquatic whales. Virtual reconstruction of a partially complete ossicular chain of an Eocene protocetid whale documents for the first time the three ossicles of a semi-aquatic archaeocete. Contrary to previous hypotheses, these ossicles present different evolutionary patterns, showing that the ossicular chain does not act as a single morphological module. Functional analyses of the different middle ear units highlight a mosaic pattern of terrestrial and aquatic signatures. This integrative anatomical and functional study brings strong evidence that protocetids were adapted to their dual acoustic environment with efficient hearing in both air and water.
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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.