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81 results for “anadromous”
F I G U R E 1 in Differences in growth between offspring of anadromous and freshwater brown trout Salmo trutta
F I G U R E 1 The River Imsa (1) in southwestern Norway where the anadromous Salmo trutta spawned. (A) The location of the fish trap where the anadromous fish were sampled. (B) The location of the upstream impassable waterfall, built between 1993 and 1995. (C) The brook, Fossbekk, where the resident fish spawned
F I G U R E 4 in Differences in growth between offspring of anadromous and freshwater brown trout Salmo trutta
F I G U R E 4 Mean growth per day (Ω, Equation 1, ±S.D.) at 18.3 C and 14.9 C of juvenile age 0 offspring of (a) 7.1 C and (b) 4.4 C incubated freshwater resident Salmo trutta (1, solid line) and anadromous (3, broken line), and hybrids between freshwater resident and anadromous (2, dotted line) S. trutta of the River Imsa, Norway
F I G U R E 2 in Differences in growth between offspring of anadromous and freshwater brown trout Salmo trutta
F I G U R E 2 The experimental design: 12 anadromous (A) and 12 freshwater resident (R) Salmo trutta of each sex were crossed. Parallel groups of the fertilized eggs from each cross were incubated at two temperatures (±S.D.), either 4.4 ± 1.5 C or 7.1 ± 0.6 C. After hatching, parallel groups were reared at natural River Imsa temperature until the commencement of the growth experiment when parallels of the 16 reared groups were tested at two temperatures (±S.D.), either 14.9 ± 2.2 C or 18.3 ± 1.5 C 14.9. Ten S. trutta were used in each group tested, 320 fish altogether
Figure A2 in A student-based expansion of the strategies of reproduction in fish (STOREFISH) database to 288 North American freshwater and anadromous species for 14 egg and larval traits
Figure A2. – Summary of the 162 answers for survey questions 5-9 (see Tab. A1 for details). Letter refer to the difficulties associated with (A) finding information (B) reading articles in English, (C) accessing documents, and (D) other reasons.
Figure 2 in A student-based expansion of the strategies of reproduction in fish (STOREFISH) database to 288 North American freshwater and anadromous species for 14 egg and larval traits
Figure 2. – The number of species (A) and records (B) in the original (black bars) and new (white bars) data sets for egg (left of the vertical bar) and larval (right of the bar) traits. Numbers in the x-axis correspond to trait numbers in Table I. The maximum possible number of species in (A) was 80 and 288 for the original and new data, respectively. See Table I for trait units and description.
Figure A3 in A student-based expansion of the strategies of reproduction in fish (STOREFISH) database to 288 North American freshwater and anadromous species for 14 egg and larval traits
Figure A3. – Boxplot summaries of the number of references (Q11) and traits (Q12) that the students found. See Table A1 for details.
Fig. 4 in Intestinal coccidiosis of anadromous and landlocked alewives, Alosa pseudoharengus, caused by Goussia ameliae n. sp. and G. alosii n. sp. (Apicomplexa: Eimeriidae)
Fig. 4. Goussia alosii from the intestine of landlocked alewives, bar = 10 μm. Wet mount of (A) highly elongated unsporulated oocysts and (B) sporulated oocysts with a thicker oocyst wall making up a very regular oval shape containing four highly elongated sporocysts. (C–E) Histology of coccidial stages in the intestine; (C) various stages of coccidia with an epicellular position within the intestinal epithelium; elongated unsporulated oocysts (arrows) found within the (D) intestinal epithelium and (E) within mucoid casts in the intestinal lumen.
Fig. 3 in Intestinal coccidiosis of anadromous and landlocked alewives, Alosa pseudoharengus, caused by Goussia ameliae n. sp. and G. alosii n. sp. (Apicomplexa: Eimeriidae)
Fig. 3. Goussia ameliae from landlocked alewives, bar = 10 μm. (A–C) Wet mounts of fresh coccidia preparations with (A) unsporulated oocysts and (B,C) sporulated oocysts containing four elongated sporocysts. (D–H) Histology documenting the development of the coccidian in the pyloric cecum, stained with H&E. (D) Meronts containing merozoites within the brush border on the surface of the intestinal epithelium; (E) early developmental stages (arrowheads) embedded within the brush border; (F) macrogamonts with an epicellular position on the intestinal epithelium; (G) microgametocytes (arrowhead) and unsporulated oocysts (arrow) which have sloughed from the epithelial surface; (H) severe coccidiosis with various developmental stages occupying most of the surface of the intestinal epithelium.
Fig. 2 in Intestinal coccidiosis of anadromous and landlocked alewives, Alosa pseudoharengus, caused by Goussia ameliae n. sp. and G. alosii n. sp. (Apicomplexa: Eimeriidae)
Fig. 2. Histology of coccidia infection in the intestine of anadromous alewives, stained with H&E, bar = 10 μm. (A,B) Spherical early developmental stages (arrowheads) within the brush border of the intestinal epithelium; (C) macrogamonts (arrowhead) (notice the notches nearly midway through the parasite, embedded within the surface of the intestinal epithelium); (D) macrogamonts with notches (arrowhead) and unsporulated elongated oocysts (arrows) within the intestinal epithelium.
Fig. 1 in Intestinal coccidiosis of anadromous and landlocked alewives, Alosa pseudoharengus, caused by Goussia ameliae n. sp. and G. alosii n. sp. (Apicomplexa: Eimeriidae)
Fig. 1. Goussia ameliae from anadromous alewives, bar = 10 μm. (A–C) Wet mounts of fresh coccidia preparations with (A) unsporulated oocysts, (B) oocysts in the process of sporulation, and (C) sporulated oocysts containing four sporocysts. (D–H) Histology documenting various stages of coccidia infection in the pyloric cecum, stained with H&E. (D) Intestinal epithelium with a severe infection of coccidia stages including gamonts and unsporulated oocysts covering the intestinal epithelium; (E) meront containing merozoites (arrow) attached to the microvillar surface of intestinal epithelial cells; (F) gamogony with macrogamonts (arrow) and microgametocytes (arrowhead) with an epicellular position; (G) unsporulated oocysts with an epicellular position (notice below, the focal necrosis to the intestinal epithelium); (H) a focal erosion in the intestinal epithelium with unsporulated and sporulated (arrow) oocysts released into the lumen.
Fig. 5 in Intestinal coccidiosis of anadromous and landlocked alewives, Alosa pseudoharengus, caused by Goussia ameliae n. sp. and G. alosii n. sp. (Apicomplexa: Eimeriidae)
Fig. 5. Line drawings of sporulated oocysts of Goussia ameliae from (A) anadromous and (B) landlocked alewives and (C) G. alosii sampled from landlocked alewives, bar = 5 μm.
Fig. 6 in Intestinal coccidiosis of anadromous and landlocked alewives, Alosa pseudoharengus, caused by Goussia ameliae n. sp. and G. alosii n. sp. (Apicomplexa: Eimeriidae)
Fig. 6. Phylogenetic tree based on maximum likelihood analysis (-ln = 5197.3909) based on 16 sequences obtained from Genbank and one sequence from this study (G. ameliae denoted with a bold circle). Goussia ameliae fit into a fish Goussia clade, which is distinct from other fish coccidians (*). Theilleria parva was used as an outgroup to root the tree.
Figure 2 in Resorption of scales in Atlantic salmon (Salmo salar) during its anadromous migration: a quantitative study
Figure 2. - Variations of salmon scale ratios according to sex, sea age (grilse or spring salmon) and migration stage (ascending or spawning). A: RE1 ratio (total scale surface / fork length squared). B: RE2 ratio (anterior field surface / total scale surface). C: RE3 ratio (small radius / long radius of scale). SE = standard error.
Figure 5. - Scanning electron microscopy. A in Resorption of scales in Atlantic salmon (Salmo salar) during its anadromous migration: a quantitative study
Figure 5. - Scanning electron microscopy. A: View of a spawning male scale (F = focus); B: Detail of the anterior field of the same scale showing some Howship's lacunae (arrows), which are evidence for osteoclastic resorption.
Figure 1 in Resorption of scales in Atlantic salmon (Salmo salar) during its anadromous migration: a quantitative study
Figure 1. - Measurements taken on salmon scales. A: Scale of ascending spring salmon; B: Scale of spawning spring salmon. F: Focus; LR: long radius; SA: surface of the anterior field of the scale; SP: surface of the posterior field of the scale; SR: small radius.
Postrelease exploration and stress tolerance of landlocked and anadromous Atlantic salmon and their hybrids
<p><strong>Background</strong></p> <p>We studied postrelease explorative behavior and stress tolerance of Landlocked and anadromous Atlantic salmon and their hybrids. For the research, we hybridized the Landlocked salmon of Lake Saimaa with a Baltic anadromous salmon from River Kymijoki, Southern Finland (strain originally from River Neva, Russia). These fish were hybridized in November 2017 and October 2018 in the Kainuu Fisheries Research Station, Paltamo, Kainuu, Finland (kfrs.fi).<br><br>In the data the fish are treated as four strains (column 'Strain'): <strong>1.</strong> Purebred Landlocked salmon (LLxLL), <strong>2. </strong>hybrids, where the maternal population was landlocked salmon (LLxBA), <strong>3. </strong>hybrids, where the maternal population was Baltic anadromous salmon (BAxLL) and <strong>4. </strong>purebred Baltic anadromous salmon (BAxBA).</p> <p><strong>Experiment 1. Post-release exploration</strong></p> <p>In experiment 1., consisting of two separate trials, we studied post-release exploration of the fish in four circular seminatural streams. (Datasets 'Exploration2018.csv' & 'Exploration2020.csv', see also 'Figure_1.jpg')</p> <p><strong>Experiment 2. Stress tolerance</strong></p> <p>In experiment 2. we studied the stress response and recovery of the fish (Dataset 'Stress_BernoulliData.csv', see also 'Figure_2.jpg').</p>
Anadromous waters fish surveys by the Alaska Department of Fish and Game AKSSF Project 52007
<p>Geospatial data containing stream survey information for locations in Southeast Alaska. Surveys focused on identifying the presence of anadromous fish in freshwater streams while collecting ancillary fish habitat data.</p>
Postrelease exploration and stress tolerance of landlocked and anadromous Atlantic salmon and their hybrids
Open the record for dataset details and reuse information.
Data from: Discovery and characterization of single nucleotide polymorphisms in two anadromous alosine fishes of conservation concern
Freshwater habitat alteration and marine fisheries can affect anadromous fish species, and populations fluctuating in size elicit conservation concern and coordinated management. We describe the development and characterization of two sets of 96 single nucleotide polymorphism (SNP) assays for two species of anadromous alosine fishes, alewife and blueback herring (collectively known as river herring), that are native to the Atlantic coast of North America. We used data from high-throughput DNA sequencing to discover SNPs and then developed molecular genetic assays for genotyping sets of 96 individual loci in each species. The two sets of assays were validated with multiple populations that encompass both the geographic range and the known regional genetic stocks of both species. The SNP panels developed herein accurately resolved the genetic stock structure for alewife and blueback herring that was previously identified using microsatellites and assigned individuals to regional stock of origin with high accuracy. These genetic markers, which generate data that are easily shared and combined, will greatly facilitate ongoing conservation and management of river herring including genetic assignment of marine caught individuals to stock of origin.
Quantification of thermal impacts across freshwater life stages to improve temperature management for anadromous salmonids
<p>Water temperature is the major controlling factor that shapes the physiology, behavior, and ultimately, survival of aquatic ectotherms. Here we examine temperature effects on the survival of Chinook salmon (<em>Oncorhynchus tshawytscha</em>), a species of high economic and conservation importance. We implement a framework to assess how incremental changes in temperature impact survival across populations that is based on thermal performance models for three freshwater life stages of Chinook salmon. These temperature-dependent models were combined with local spatial distribution and phenology data to translate spatial-temporal stream temperature data into maps of life stage-specific physiological performance in space and time. Specifically, we converted temperature-dependent performance (i.e., energy used by pre-spawned adults, mortality of incubating embryos, and juvenile growth rate) into a common currency that measures survival in order to compare thermal effects across life stages. Based on temperature data from two abnormally warm and dry years for three managed rivers in the Central Valley, California, temperature-dependent mortality during pre-spawning holding was higher than embryonic mortality or juvenile mortality prior to smolting. However, we found that local phenology and spatial distribution helped to mitigate negative thermal impacts. In a theoretical application, we showed that high temperatures may inhibit successful reintroduction of threatened Central Valley spring-run Chinook salmon to two rivers where they have been extirpated. To increase Chinook salmon population sizes, especially for the threatened and declining spring-run, our results indicate that adults may need more cold-water holding habitat than currently available in order to reduce pre-spawning mortality stemming from high temperatures. To conclude, our framework is an effective way to calculate thermal impacts on multiple salmonid populations and life stages within a river over time, providing local managers the information to minimize negative thermal impacts on salmonid populations, particularly important during years when cold-water resources are scarce.</p>
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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)
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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.