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679 results for “crayfish”
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.
Fig. 2 in New Crayfishes (Decapoda: Parastacidae: Euastacus) from Northeastern New South Wales, Australia
Fig. 2. Collection localities of Euastacus girurmulayn in northeastern New South Wales. The previous Whian Whian State Forest has been designated as National Park since collection.
Fig. 3 in New Crayfishes (Decapoda: Parastacidae: Euastacus) from Northeastern New South Wales, Australia
Fig. 3. Collection localities of Euastacus guruhgi in northeastern New South Wales. The previous Wollumbin State Forest has been designated as National Park and State Conservation Area since collection.
Fig. 5 in New Crayfishes (Decapoda: Parastacidae: Euastacus) from Northeastern New South Wales, Australia
Fig. 5. Euastacus girurmulayn. Dorsal view, holotype, AM P67914. Photograph: Max Egan. Scale bar is 10 mm.
Fig. 4 in New Crayfishes (Decapoda: Parastacidae: Euastacus) from Northeastern New South Wales, Australia
Fig. 4. Euastacus dalagarbe. Dorsal view, holotype, AM P67884. Photograph: Max Egan. Scale bar is 10 mm.
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. 3 in New Findings Of White Clawed Crayfish, Austropotamobius Pallipes (Decapoda, Astacidae), And Peculiarities Of Its Spatial Distribution In Neretvica (Bosnia And Herzegovina)
Fig. 3. Isobath map (depth, m) and isopach map (velocity, m/s) (the locations of the crayfish catches are marked with red dots).
Fig. 6 in New Findings Of White Clawed Crayfish, Austropotamobius Pallipes (Decapoda, Astacidae), And Peculiarities Of Its Spatial Distribution In Neretvica (Bosnia And Herzegovina)
Fig. 6. Extraction of the crayfish from the trap at Neretvica near the confluence with the Crny Potok.
Fig. 5 in New Findings Of White Clawed Crayfish, Austropotamobius Pallipes (Decapoda, Astacidae), And Peculiarities Of Its Spatial Distribution In Neretvica (Bosnia And Herzegovina)
Fig. 5. Isobath map (depth, m) and isotach map (velocity, m/s) (the locations of the crayfish catches using scuba diving are marked with red dots).
Maps of depths are created for the site of 50 m length. Flow types are turbulent, broken standing waves, unbroken standing waves, and rippled. The average width was 8 m and varied from 5.5 to 12 m. Bed elements included bars, rocks, and step/pools. The average depth was 0.35 m, with a maximum of 0.6 m. The average velocity was 0.4 m/s, with a maximum of 1.2 m/s (figs 10). Distribution of bottom habitats at the locations with the crayfish are as follows: megalital — 5 %, macrolithal — 30 %, mesolithal — 25 %, microlithal — 15 %, psammal — 15 %, CPOM — 10 %. Assessment by hydrobiological parameters showed that the presence of Lyngbya and Oscillatoria, as well as the increase of the number of Oligochae- in New Findings Of White Clawed Crayfish, Austropotamobius Pallipes (Decapoda, Astacidae), And Peculiarities Of Its Spatial Distribution In Neretvica (Bosnia And Herzegovina)
Maps of depths are created for the site of 50 m length. Flow types are turbulent, broken standing waves, unbroken standing waves, and rippled. The average width was 8 m and varied from 5.5 to 12 m. Bed elements included bars, rocks, and step/pools. The average depth was 0.35 m, with a maximum of 0.6 m. The average velocity was 0.4 m/s, with a maximum of 1.2 m/s (figs 10). Distribution of bottom habitats at the locations with the crayfish are as follows: megalital — 5 %, macrolithal — 30 %, mesolithal — 25 %, microlithal — 15 %, psammal — 15 %, CPOM — 10 %. Assessment by hydrobiological parameters showed that the presence of Lyngbya and Oscillatoria, as well as the increase of the number of Oligochae-
Fig. 4 in New Findings Of White Clawed Crayfish, Austropotamobius Pallipes (Decapoda, Astacidae), And Peculiarities Of Its Spatial Distribution In Neretvica (Bosnia And Herzegovina)
Fig. 4. Habitat with the highest concentration of the crayfish in Neretvica at the confluence with the Crni Potok.
Fig. 5 in The Thick-Clawed Crayfish, Astacus Pachypus (Crustacea, Decapoda, Astacidae), In Ukraine: Karyotype, Allozymes And Morphological Parameters
Fig. 5. Distribution of specimens of four species of the genus Astacus in the dimensions of the first and the third canonical variables (analysis of absolute body measurements).
Fig. 4 in The Thick-Clawed Crayfish, Astacus Pachypus (Crustacea, Decapoda, Astacidae), In Ukraine: Karyotype, Allozymes And Morphological Parameters
Fig. 4. The distribution of specimens of four species of the genus Astacus in the dimensions of the first and the second canonical variables (analysis of absolute body measurements).
Fig. 3 in The Thick-Clawed Crayfish, Astacus Pachypus (Crustacea, Decapoda, Astacidae), In Ukraine: Karyotype, Allozymes And Morphological Parameters
Fig. 3. General view of the male: a — broad-clawed crayfish (A. astacus); b — thick-clawed crayfish (A. pachypus); c — long-clawed crayfish (A. leptodactylus); d — A. angulosus.
Google Scholar search record: ?start=0&q=crayfish+%22water+chemistry%22&hl=en&as_vis=0,5&as_sdt=0,5
File generated: Search date, time, timezone: 2022-04-15 17:50:45 (Europe/London) Search parameters: All these words: crayfish None of these words: This exact word or phrase: "water chemistry" Any these words: Language: en Between these years: and Number of pages exported: 1 Starting from page: 1 Citations included: TRUE Citations included: TRUE Search only in the title: FALSE Authors: Source: GS links generated: https://scholar.google.co.uk/scholar?start=0&q=crayfish+%22water+chemistry%22&hl=en&as_vis=0,5&as_sdt=0,5
Google Scholar search record: ?start=0&q=crayfish+%22water+chemistry%22&hl=en&as_vis=0,5&as_sdt=0,5
File generated: Search date, time, timezone: 2022-04-15 17:34:33 (Europe/London) Search parameters: All these words: crayfish None of these words: This exact word or phrase: "water chemistry" Any these words: Language: en Between these years: and Number of pages exported: 1 Starting from page: 1 Citations included: TRUE Citations included: TRUE Search only in the title: FALSE Authors: Source: GS links generated: https://scholar.google.co.uk/scholar?start=0&q=crayfish+%22water+chemistry%22&hl=en&as_vis=0,5&as_sdt=0,5
Underwater crayfish dataset
<p>The crayfish dataset was generated using the <a href="https://roboflow.com/">Roboflow</a> platform. The annotations are compatible with the <a href="https://github.com/ultralytics/yolov5">PyTorch YOLOv5</a> architecture.</p> <p><em><strong>Dataset details:</strong></em></p> <p><strong>Training Set:</strong> 92%, 1.2k images</p> <p><strong>Validation Set</strong>: 5%, 69 images</p> <p><strong>Testing Set</strong>: 3%, 35 images</p> <p><strong>Dimensions:</strong> 416x416</p> <p><em><strong>Augmentations:</strong></em></p> <p><strong>Flip:</strong> Horizontal</p> <p><strong>90° Rotate:</strong> Clockwise, Counter-Clockwise</p> <p><strong>Crop:</strong> 0% Minimum Zoom, 20% Maximum Zoom</p> <p><strong>Grayscale:</strong> Apply to 50% of images</p> <p><strong>Hue:</strong> Between -48° and +48°</p> <p><strong>Saturation:</strong> Between -25% and +25%</p> <p><strong>Brightness:</strong> Between -25% and +25%</p> <p><strong>Exposure:</strong> Between -25% and +25%</p> <p><strong>Blur:</strong> Up to 10px</p> <p><strong>Noise:</strong> Up to 5% of pixels</p> <p><strong>Cutout</strong>: 3 boxes with 10% size each</p> <p><strong>Mosaic:</strong> Applied</p>
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