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106 results for “lotic”
Fig. 2 in Diversity and Distribution of Peritrich Ciliates on the Snail Physa acuta Draparnaud, 1805 (Gastropoda: Physidae) in a Eutrophic Lotic System
Fig. 2. Schematic representation of the distribution of peritrichs ciliates species on the Physa acuta shell. © 2018 Academia Sinica, Taiwan
Fig. 1 in Diversity and Distribution of Peritrich Ciliates on the Snail Physa acuta Draparnaud, 1805 (Gastropoda: Physidae) in a Eutrophic Lotic System
Fig. 1. in vivo photomicrographics of peritrich ciliates species on Physa acuta. (A-C) Peritrich ciliates attached to the shell. (D) Epistylis sp. (E) Opercularia articulata. (F) Carchesium polypinum. (G) Vorticella sp. (H) Vorticella campanula. (I) Epistylis plicatilis. (J) Thuricola kellicottiana. Scale bars: A = 0.15 cm; B = 1.5 mm; C = 0.5 mm; D-L = 25 µm.
Data from: Identifying spawning sites and other critical habitat in lotic systems using eDNA “snapshots”: a case study using the sea lamprey Petromyzon marinus L.
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Figure 1 from: Fedorova LI, Kaygorodova IA (2022) First data on the Hirudinea fauna of lotic ecosystems of the Khanty-Mansi Autonomous Area (Russia). ZooKeys 1082: 73-85. https://doi.org/10.3897/zookeys.1082.71859
Figure 1 Schematic map of geographic location of the Khanty-Mansi Autonomous Area and studied lotic systems. River basins: I = Severnaya Sosva, II = Konda-Irtysh, III = Ob, and IV = Bolshoi Yugan.
FIGURE 1 in Comparative analysis of the reproductive activity of Leporinus piau (Characiformes: Anostomidae) in lentic and lotic environments
FIGURE 1 | Histological sections of ovaries of Leporinus piau stained by HE. (A) Ovary in rest (F1) with initial perinucleolar oocytes (O1) containing basophilic cytoplasm and nucleus with various nucleoli and advanced perinucleolar ovocytes (O2) containing finely granular cytoplasm and nucleus with nucleoli close to the nuclear envelope. (B) Beginning of maturation with the appearance of pre-vitellogenic follicles with characteristic cortical alveoli (O3) in the peripheral ooplasm. (C) Maturation/mature (F2) with vitellogenic oocyte (O4) and cytoplasm filled with yolk globules, thin zona radiata (ZR), and squamous follicular cells. (D) Spawned (F3) with post-ovulatory follicles (POF) alongside follicles at all stages of development. (E) Detail of post-ovulatory follicle (POF). (F) Detail of atresic follicle (AF). Bars: A and B = 200µm; C = 300µm; D and F = 150µm; E = 50µm.
Data from: Compensatory dynamics of lotic algae break down nonlinearly with increasing nutrient enrichment
<p>One important mechanism governing the temporal maintenance of biodiversity is asynchrony in cooccurring competitors due to fluctuating environments (i.e. compensatory dynamics). Temporal niche partitioning has evolved in response to predictable oscillations in environmental conditions so that species may offset competition, but we do not yet have a clear understanding of how novel anthropogenic stressors alter seasonal patterns of succession. Many primary producers are nutrient-limited, and enrichment may decrease the importance of environmental fluctuations that govern which species are effective competitors under naturally low nutrient regimes. Consequently, elevated nutrient concentrations may synchronize species responses to seasonality. By studying benthic algal assemblages over two years from 35 streams that spanned a wide gradient of nutrient enrichment, we found that compensatory dynamics characterizing seasonal succession under natural nutrient regimes broke down at relatively low levels of total phosphorus (P) enrichment (~ 25 μg L<sup>-1</sup>). With increasing P more species were able to coexist at any given time, and seasonal variation in assemblage composition was characterized by synchronous swings in species biovolumes. We also observed much higher instability in assemblage biovolumes with declines in compensatory dynamics, which indicates that anthropogenic alteration of nutrient regimes can affect community stability by changing the dominant mode of seasonal succession. Our findings indicate that compensatory fluctuations of stream algae are driven by seasonality, and provide insight about how nutrient enrichment alters evolved drivers of species coexistence.</p>
Figure 4 from: Rodriguez P, Fend S, Lenat D (2014) Sylphella puccoon gen. n., sp. n. and two additional new species of aquatic oligochaetes (Lumbriculidae, Clitellata) from poorly-known lotic habitats in North Carolina (USA). ZooKeys 451: 1-32. https://doi.org/10.3897/zookeys.451.7304
Figure 4 - Drawings of Cookidrilus pocosinus sp. n. A anterior body region B reproductive organs C detail of the atrium showing the vasa deferentia junction and prostatic cell clusters.
Figure 6 from: Rodriguez P, Fend S, Lenat D (2014) Sylphella puccoon gen. n., sp. n. and two additional new species of aquatic oligochaetes (Lumbriculidae, Clitellata) from poorly-known lotic habitats in North Carolina (USA). ZooKeys 451: 1-32. https://doi.org/10.3897/zookeys.451.7304
Figure 6 - Drawings of Stylodrilus coreyi sp. n. A–B Anterior part of the body showing double annulation and genital pores (A) and digestive tract with associated glands (B) C details of male duct D reproductive organs.
Figure 3 from: Rodriguez P, Fend S, Lenat D (2014) Sylphella puccoon gen. n., sp. n. and two additional new species of aquatic oligochaetes (Lumbriculidae, Clitellata) from poorly-known lotic habitats in North Carolina (USA). ZooKeys 451: 1-32. https://doi.org/10.3897/zookeys.451.7304
Figure 3 - Comparative schema of the reproductive system and chaetae in the new genus Sylphella and other related prosoporous lumbriculid genera. Type-1 and type-2 penes as described by Rodriguez and Giani (1987) (see text).
Figure 5 from: Rodriguez P, Fend S, Lenat D (2014) Sylphella puccoon gen. n., sp. n. and two additional new species of aquatic oligochaetes (Lumbriculidae, Clitellata) from poorly-known lotic habitats in North Carolina (USA). ZooKeys 451: 1-32. https://doi.org/10.3897/zookeys.451.7304
Figure 5 - Cookidrilus pocosinus sp. n. A Anterior region of the body B caudal region with pygidium C chaetae D chaetal gland behind ventral bundle of chaetae E clitellum F spermathecal and male pores in front of and behind ventral chaetae of segment X G atrium H atrial ampulla showing apical junction of vasa deferentia I atrial ampulla showing junction of prostatic cell clusters J basal junction of vas deferens to atrial ampulla K detail of atrial duct and protruded penis L third spermatheca behind the female segment. A, D, J, K, L histological sections, other photographs from stained whole mounts or dissected specimens.
Figure 1 from: Rodriguez P, Fend S, Lenat D (2014) Sylphella puccoon gen. n., sp. n. and two additional new species of aquatic oligochaetes (Lumbriculidae, Clitellata) from poorly-known lotic habitats in North Carolina (USA). ZooKeys 451: 1-32. https://doi.org/10.3897/zookeys.451.7304
Figure 1 - Drawings of Sylphella puccoon gen. n., sp. n. A Anterior part of the body showing secondary annulations, clitellum and position of genital pores B chaetae of segment II and clitellar region C schematic drawing of reproductive organs (female funnel obscured by ovary) D detail of atrium E posterior lateral blood vessels.
Figure 2 from: Rodriguez P, Fend S, Lenat D (2014) Sylphella puccoon gen. n., sp. n. and two additional new species of aquatic oligochaetes (Lumbriculidae, Clitellata) from poorly-known lotic habitats in North Carolina (USA). ZooKeys 451: 1-32. https://doi.org/10.3897/zookeys.451.7304
Figure 2 - Sylphella puccoon gen. n., sp. n. A Anterior part of the worm, showing prostomium B clitellar epidermis C chaeta in XII D egg sac containing oocytes and some blood vessels E dorsal vessel showing the cardiac cells and supra-intestinal vessel, dorsal to the intestine in segment XVII F reproductive segments, showing two atria, with their respective sperm funnels, and spermathecae of an unmated specimen G sperm funnel on the septum behind the atrium H atrial ampulla with sperm in the lumen, showing the several layers of musculature I prostatic cells forming small clusters over the atrial ampulla J cross-hatched muscular fibers shown at the surface of the atrial ampulla K Spermathecal ampulla with loose sperm in the lumen L spermathecal duct M penis within the penial sac, with conical penial sheath. For comparison N penis with tubular cuticular sheath in Styloscolex japonicus, and O penis with a soft cuticular layer in Lumbriculus japonicus. D, E, G–O histological sections of reproductive organs, other photographs from stained whole mounts or dissected specimens.
Figure 7 from: Rodriguez P, Fend S, Lenat D (2014) Sylphella puccoon gen. n., sp. n. and two additional new species of aquatic oligochaetes (Lumbriculidae, Clitellata) from poorly-known lotic habitats in North Carolina (USA). ZooKeys 451: 1-32. https://doi.org/10.3897/zookeys.451.7304
Figure 7 - Stylodrilus coreyi sp. n. A Anterior part of the body, B: simple-pointed chaeta C clitellum D nephridial efferent duct in ventral part of posterior segment (anterior part facing up) E–G consecutive histological sections of male duct H–I details of prostatic glands and connection to atrial ampulla J spermathecal ampulla K spermathecal duct L female funnel. E–L histological sections, other photographs from stained whole mounts or dissected specimens.
Data from: Lotic cyprinid communities can be structured as nest webs and predicted by the stress-gradient hypothesis
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Data from: Compensatory dynamics of lotic algae break down nonlinearly with increasing nutrient enrichment
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Fishing for mammals: landscape-level monitoring of terrestrial and semi-aquatic communities using eDNA from lotic ecosystems
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Figure 1 from: Ivković M, Ivanković L (2019) The genus Dixa (Diptera, Dixidae) in Croatian lotic habitats, with a checklist of species and relationships with the fauna of neighbouring countries. ZooKeys 867: 45-54. https://doi.org/10.3897/zookeys.867.36613
Figure 1 Sampling sites of Dixa recorded from Croatia (see Table 1 for codes).
Figure 2 from: Ivković M, Ivanković L (2019) The genus Dixa (Diptera, Dixidae) in Croatian lotic habitats, with a checklist of species and relationships with the fauna of neighbouring countries. ZooKeys 867: 45-54. https://doi.org/10.3897/zookeys.867.36613
Figure 2 Comparison of the Croatian Dixa assemblage with the fauna of neighbouring countries.
Fig. 34 in A revision of the lotic genus Potamyia BANKS 1900 (Trichoptera: Hydropsychidae) with the description of eight new species
Fig. 34: Potamyia phaidra, Fig. 35: Potamyia siveci, Fig. 36: Potamyia trenhona nov.spec.
FIGURE 6 in Two new species of lotic breeding salamanders (Amphibia, Caudata, Hynobiidae) from western Japan
FIGURE 6. Egg sacs of Hynobius sematonotos n. sp. from Shobara-shi, Hiroshima Prefecture (A) and egg sacs of Hynobius oyamai n. sp. from Yamaga-shi, Kumamoto Prefecture (B). Scale bar in (B) shows 5 cm.
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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.