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94 results for “freshwater crayfish”
Figure 1 in The Importance Of Natura 2000 Sites And Their Management For The Conservation Of Freshwater Fish, Lamprey And Crayfish In Latvia
Figure 1. Occurrence of freshwater fish, lamprey and crayfish species (n=46) within Natura 2000 outside N2000 at GC5, grouped by 0–10 %; 10–25 %; 25–50 %;>50 % with species numbers 0–4; 5–11; 12–23; 24–40.
Figure 3 in The Importance Of Natura 2000 Sites And Their Management For The Conservation Of Freshwater Fish, Lamprey And Crayfish In Latvia
Figure 3. Occurrence of migratory freshwater fish and lamprey species (n=5) in N2000 and outside N2000 at GC5 cells, grouped by 0–10 %; 10–25 %; 25–50 %;>50 % with species numbers 0; 1; 2; 3–5.
Figure 4 in The Importance Of Natura 2000 Sites And Their Management For The Conservation Of Freshwater Fish, Lamprey And Crayfish In Latvia
Figure 4. Occurrence of introduced freshwater fish, lamprey and crayfish species (n=6) in N2000 and outside N2000 at GC5 cells, grouped by 0–10 %; 10–25 %; 25–50 %;>50 % with species numbers 0; 1; 2–3; 4.
Figure 4 in A New Species of the Freshwater Crayfish Genus Euastacus (Decapoda: Parastacidae) from Northeastern New South Wales, Australia
Figure 4. Distinguishing features of the chela of Euastacus mirangudjin n.sp. Dorsal view (A, B) and ventral view (C, D) of chela of holotype (A, C) and paratype (B, D). ad, apical mesial dactylar spine (1 spine); ap, dorsal apical propodal spine row (3–4 spin es); dce, spine row above dactylar cutting edge (3–4 spines); ldb, bumps and protuberances lateral to dactylar base; mc, mesial carpal sp ines (usually 3, paratype with 4); mp, mesial propodal spines (5); pce, spine row above propodal cutting edge (4–7 spines, extending to base of chela gape); v, ventral carpal spine (large); vm, ventromesal carpal spine (1 spine, smaller than or as large as ventral carpal spine). Photographs by Max Egan.
Figure 3. Euastacus mirangudjin n in A New Species of the Freshwater Crayfish Genus Euastacus (Decapoda: Parastacidae) from Northeastern New South Wales, Australia
Figure 3. Euastacus mirangudjin n.sp. Dorsal view of chela (paratype) showing 4 mesial carpal spines. All other specimens examined bore 3 mesial carpal spines. Photograph by Max Egan.
Freshwater crayfishes (Decapoda: Astacidea) of the Montana Entomology Collection, Montana State University
<p>Astacidea (colloquially known as crayfish, crawfish, crawdads, or mudbugs) are well-recognized crustaceans, with distributions especially of interest to fisheries and aquatic ecologists. From 2018 to 2022, Montana Entomology Collection (MTEC), funded by the Council on Library and Information Resources “Hidden Collections” grant, digitized Astacidea (Crustacea: Decapoda) specimens housed in its museum. This produced over 160 metadata records detailing sampling localities, collecting dates, number of individuals, and identifications of specimens collected mainly from Montana, USA. The metadata records reveal the efforts of 28 collectors, spanning 60 years of sampling. This dataset makes information associated with 726 individual specimens from 5 species stored in the MTEC available.</p>
Fig. 2 in An illustrated key to the Bulgarian freshwater crayfish species of family Astacidae (Crustacea: Decapoda)
Fig. 2. Astacus leptodactylus: a/ spines behind cervical groove; b/ rostrum; c/ abdominal pleura 2-4; d/ second gonopod with talon.
Fig. 3 in An illustrated key to the Bulgarian freshwater crayfish species of family Astacidae (Crustacea: Decapoda)
Fig. 3. Astacus astacus: a/ spines behind cervical groove; b/ rostrum; c/ abdominal pleura 2-4; d/ second gonopod.
Linked collectors and determiners for: Two new species of freshwater crayfish of the genus Faxonius (Decapoda: Cambaridae) from the Ozark Highlands of Arkansas and Missouri.
Natural history specimen data linked to collectors and determiners held within, "Two new species of freshwater crayfish of the genus Faxonius (Decapoda: Cambaridae) from the Ozark Highlands of Arkansas and Missouri". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/6c711c6e-5983-41a5-9ba0-133ac3e85f4a">https://bionomia.net/dataset/6c711c6e-5983-41a5-9ba0-133ac3e85f4a</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/6c711c6e-5983-41a5-9ba0-133ac3e85f4a">https://gbif.org/dataset/6c711c6e-5983-41a5-9ba0-133ac3e85f4a</a>. Formatted as a Frictionless Data package.
Fig. 3 in Distribution Of Freshwater Crayfish In Latvia
Fig. 3. Distribution of narrow-clawed crayfish in Latvia (1992-2018).
Fig. 2 in Distribution Of Freshwater Crayfish In Latvia
Fig. 2. Distribution of noble crayfish in Latvia (1992-2018).
Figure 1 in A New Species of the Freshwater Crayfish Genus Euastacus (Decapoda: Parastacidae) from Northeastern New South Wales, Australia
Figure 1. Collection locality of Euastacus mirangudjin n.sp.
Figure 2. Euastacus mirangudjin n in A New Species of the Freshwater Crayfish Genus Euastacus (Decapoda: Parastacidae) from Northeastern New South Wales, Australia
Figure 2. Euastacus mirangudjin n.sp. Dorsal view, holotype. Photograph by Max Egan.
Invasive crayfish: drivers or passengers of degradation in freshwater ecosystems?
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Data from: Monitoring a Norwegian freshwater crayfish tragedy - eDNA snapshots of invasion, infection and extinction
1.The European Noble crayfish (Astacus astacus) is threatened by crayfish plague caused by the oomycete Aphanomyces astaci, which is spread by the invasive North American crayfish (e.g. signal crayfish, Pacifastacus leniusculus). Surveillance of crayfish plague status in Norway has traditionally relied on the monitoring survival of cage‐held noble crayfish, a method of ethical concern. Additionally, trapping is used in crayfish population surveillance. Here we test whether environmental DNA (eDNA) monitoring could provide a suitable alternative to the cage‐method, and a supplement to trapping. 2.We took advantage of an emerging crayfish plague outbreak in a Norwegian watercourse following illegal introduction of disease‐carrying signal crayfish, and initiated simultaneous eDNA‐monitoring and cage‐based surveillance, supplemented with trapping. A total of 304 water samples were filtered from several sampling stations over a four year period. eDNA data (species‐specific qPCR) for the presence of A. astaci, noble and signal crayfish within the water samples were compared to cage mortality and trapping. 3.This is the first study comparing eDNA‐monitoring and cage‐surveillance during a natural crayfish plague outbreak. We show that eDNA‐monitoring corresponds well with the biological status measured in terms of crayfish mortality and trapping results. eDNA analysis also reveals the presence of A. astaci in the water up to 2.5 weeks in advance of the cage‐method. eDNA estimates of A. astaci concentration and noble crayfish numbers increased markedly during mortality, and vanished quickly thereafter. eDNA provides a snapshot of the presence, absence or disappearance of crayfish regardless of season, and constitutes a valuable supplement to the trapping‐method that relies on season and legislation. 4.Synthesis and applications. Simultaneous eDNA‐monitoring of Aphanomyces astaci (crayfish plague) and relevant native and invasive freshwater crayfish species is well‐suited for early‐warning of invasion or infection, risk assessments, habitat evaluation and surveillance regarding pathogen and invasive/native crayfish status. This non‐invasive, animal‐welfare friendly method excludes the need for cage‐held susceptible crayfish in disease‐monitoring. Further, eDNA‐monitoring is less likely to spread A. astaci than traditional methods. This study resulted in the implementation of eDNA‐monitoring for Norwegian crayfish plague and crayfish surveillance programmes, and we believe other countries could improve management strategies for freshwater crayfish using a similar approach.
Data from: Phylogenetic evidence from freshwater crayfishes that cave adaptation is not an evolutionary dead-end
Caves are perceived as isolated, extreme habitats with a set of uniquely specialized biota, which long ago led to the idea that caves are 'evolutionary dead-ends.' This suggests that cave-adapted taxa may be doomed for extinction before they can diversify or transition to a more stable state. However, this hypothesis has not been explicitly tested in a phylogenetic framework with multiple independent cave-dwelling groups. Here we use the freshwater crayfish, a group with dozens of cave-dwelling species in multiple lineages, as a system to test this hypothesis. We consider historical patterns of lineage diversification and habitat transition as well as current patterns of geographic range size. We find that while cave-dwelling lineages have small relative range sizes and rarely transition back to the surface, they exhibit remarkably similar diversification patterns to those of other habitat types and appear to be able to maintain a diversity of lineages through time. This suggests that cave-adaptation is not a 'dead-end' for freshwater crayfish, which has positive implications for our understanding of biodiversity and conservation in cave habitats.
FIGURE 9 in Two new species of South American freshwater crayfish genus Parastacus Huxley, 1879 (Crustacea: Decapoda: Parastacidae)
FIGURE 9. Parastacus caeruleodactylus Ribeiro & Araujo sp. nov. Living specimens. A, adult male dorsal view; B, adult male lateral view, arrow indicates tufts of long setae coverture in the dorsal and ventral regions of dactylus, propodus and carpus of second pereiopod; C, adult male chelipeds, arrow indicates blue coloration of fingers; D, juvenile dorsal view; E, juvenile lateral view; F, ovigerous female ventral view. Scale bars: A, B, C—2.5 cm; D, E—1cm.
FIGURE 7 in Two new species of South American freshwater crayfish genus Parastacus Huxley, 1879 (Crustacea: Decapoda: Parastacidae)
FIGURE 7. Parastacus caeruleodactylus Ribeiro & Araujo sp. nov., holotype and paratypes: A, epistome (holotype); B, thoracic sternites and gonopores (holotype); C, thoracomere 8 caudal view (holotype); D—antennal scale lateral view (paratype 1); E, mandible (paratype 8); F, third maxilliped ventral view (paratype 1); G, third maxilliped dorsal view (paratype 1); H, first pereiopod lateral view (holotype); I, first pereiopod dorsal view (holotype); J, second pereiopod lateral view (holotype). Scale bars: A, C—2.5 mm; B, J—5 mm; D, E—2 mm; F, G—5 mm; H, I—1 cm.
FIGURE 6 in Two new species of South American freshwater crayfish genus Parastacus Huxley, 1879 (Crustacea: Decapoda: Parastacidae)
FIGURE 6. Parastacus caeruleodactylus Ribeiro & Araujo sp. nov., holotype and paratypes: A, habitus dorsal (holotype); B, cephalon dorsal view (holotype); C, cephalon lateral view (holotype); D, female abdominal somites dorsal view (paratype 1); E, first and second abdominal pleura (holotype); F, first and second abdominal pleura (paratype 1); G, tailfan (holotype). Scale bars: A, D—1 cm; B, C, E, F, G—5 mm.
FIGURE 8 in Two new species of South American freshwater crayfish genus Parastacus Huxley, 1879 (Crustacea: Decapoda: Parastacidae)
FIGURE 8. Parastacus caeruleodactylus Ribeiro & Araujo sp. nov. Habitat and live specimen. A, Swamp forest; B, open chimney in moist soil; C, closed chimney; D, living specimen in moist soil.
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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
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.