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27 results for “Astacidae”
Figure 3 in Cheliped loss and abnormalities of the narrow-clawed crayfish, Pontastacus leptodactylus (Eschscholtz, 1823) (Crustacea: Decapoda: Astacidae)
Figure 3. Left cheliped abnormalities observed in Pontastacus leptodactylus individuals collected from the Atikhisar Reservoir in Çanakkale, Turkey. Red circles indicate the abnormalities on the left chelipeds
Figure 2 in Cheliped loss and abnormalities of the narrow-clawed crayfish, Pontastacus leptodactylus (Eschscholtz, 1823) (Crustacea: Decapoda: Astacidae)
Figure 2. Right cheliped abnormalities observed in Pontastacus leptodactylus individuals collected from the Atikhisar Reservoir in Çanakkale, Turkey. Red circles indicate the abnormalities on the right chelipeds.
Figure 1 in Cheliped loss and abnormalities of the narrow-clawed crayfish, Pontastacus leptodactylus (Eschscholtz, 1823) (Crustacea: Decapoda: Astacidae)
Figure 1. Map of the sampling area (Atikhisar Reservoir in Çanakkale, Turkey) where Pontastacus leptodactylus individuals were collected. The red triangle indicates the sampling location within the lake.
Figure 4 in Cheliped loss and abnormalities of the narrow-clawed crayfish, Pontastacus leptodactylus (Eschscholtz, 1823) (Crustacea: Decapoda: Astacidae)
Figure 4. Both right and left cheliped abnormalities observed in Pontastacus leptodactylus individuals collected from the Atikhisar Reservoir in Çanakkale, Turkey. Red circles indicate the abnormalities on both right and left chelipeds.
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.
Fig. 2 in New records of Austropotamobius pallipes (Decapoda: Astacidae) relict populations from the Ticino River
Fig. 2 - Study area and its location in Lombardy and in the Lombard Park of the Ticino Valley. In green, the locations of the whiteclawed crayfish populations. Populations A and B were discovered in 2021. C is a population already known and reconfirmed after 16 years. In red, the populations (D, F) known until 2005 but not confirmed in the 2021 surveys. In site E, the species was not found. / Area di studio e sua localizzazione in Lombardia e nel Parco Lombardo della Valle del Ticino. Le località dove sono state osservate popolazioni di gambero di fiume sono indicate in verde. Le popolazioni A e B sono state scoperte nel 2021. C'è una popolazione precedentemente nota e la cui presenza è stata riconfermata dopo 16 anni. In rosso sono indicate le popolazioni (D, F) note fino al 2005 ma la cui presenza non è stata confermata nel corso del 2021. Nel sito E la specie non è stata trovata.
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.
Fig. 2 in Short communication Prima segnalazione del gambero alloctono Pacifastacus leniusculus (Decapoda, Astacidae) in Provincia di Savona, Italia
Fig. 2 – Mappa in dettaglio: pallino nero = stazioni monitorate in provincia di Alessandria; pallino bianco con punto = segnalazioni in provincia di Savona; triangolo nero = ultima segnalazione della specie autoctona (in Candiotto et al. 2010).
Fig. 1 in Short communication Prima segnalazione del gambero alloctono Pacifastacus leniusculus (Decapoda, Astacidae) in Provincia di Savona, Italia
Fig. 1 – Esemplare di P. leniusculus osservato, nell'estate 2015, nelle acque del torrente Valla in provincia di Savona. (Foto: D. Ghia).
Fig. 11 in New Findings Of White Clawed Crayfish, Austropotamobius Pallipes (Decapoda, Astacidae), And Peculiarities Of Its Spatial Distribution In Neretvica (Bosnia And Herzegovina)
Fig. 11. Size structure of cray fish by locations.
Fig. 10 in New Findings Of White Clawed Crayfish, Austropotamobius Pallipes (Decapoda, Astacidae), And Peculiarities Of Its Spatial Distribution In Neretvica (Bosnia And Herzegovina)
Fig. 10. Isobath maps (depth, m), isotach map (velocity, m/s) — autumn.
Fig. 7 in New Findings Of White Clawed Crayfish, Austropotamobius Pallipes (Decapoda, Astacidae), And Peculiarities Of Its Spatial Distribution In Neretvica (Bosnia And Herzegovina)
Fig. 7. Typical crayfish habitats in the Gorovnik.
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