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40 results for “Pandalus”
FIGURE 21 in Morphological features of larvae of Pandalus eous, P. goniurus, and P. tridents (Decapoda, Pandalidae) from planktonic samples taken in marine waters near Kamchatka Peninsula
FIGURE 21. Variations of the structure of the rostrum (first–sixth zoeal stages) in corresponding stages of Pandalus goniurus.
FIGURE 20 in Morphological features of larvae of Pandalus eous, P. goniurus, and P. tridents (Decapoda, Pandalidae) from planktonic samples taken in marine waters near Kamchatka Peninsula
FIGURE 20. Variations of the structure of the rostrum (first-seventh zoeal stages) in corresponding stages of Pandalus eous.
FIGURE 13 in Morphological features of larvae of Pandalus eous, P. goniurus, and P. tridents (Decapoda, Pandalidae) from planktonic samples taken in marine waters near Kamchatka Peninsula
FIGURE 13. Morphology features of Pandalus goniurus. Fourth zoeal stage. Abbreviations above in Materials and methods. Scale: 1 mm.
FIGURE 4 in Morphological features of larvae of Pandalus eous, P. goniurus, and P. tridents (Decapoda, Pandalidae) from planktonic samples taken in marine waters near Kamchatka Peninsula
FIGURE 4. Morphology features of Pandalus eous. Third zoeal stage. Abbreviations above in Materials and methods. Scale: 1 mm.
FIGURE 15 in Morphological features of larvae of Pandalus eous, P. goniurus, and P. tridents (Decapoda, Pandalidae) from planktonic samples taken in marine waters near Kamchatka Peninsula
FIGURE 15. Morphology features of Pandalus goniurus. Sixth zoeal stage. Abbreviations above in Materials and methods. Scale: 1 mm.
FIGURE 3 in Morphological features of larvae of Pandalus eous, P. goniurus, and P. tridents (Decapoda, Pandalidae) from planktonic samples taken in marine waters near Kamchatka Peninsula
FIGURE 3. Morphology of Pandalus eous. Second zoeal stage. Abbreviations above in Materials and methods. Scale: 1 mm. Abbreviations above in Materials and methods. Scale: 0.5 mm.
FIGURE 2 in Morphological features of larvae of Pandalus eous, P. goniurus, and P. tridents (Decapoda, Pandalidae) from planktonic samples taken in marine waters near Kamchatka Peninsula
FIGURE 2. Morphology of Pandalus eous. First zoeal stage. Abbreviations above in Materials and methods. Scale: 1 mm.
FIGURE 1 in Morphological features of larvae of Pandalus eous, P. goniurus, and P. tridents (Decapoda, Pandalidae) from planktonic samples taken in marine waters near Kamchatka Peninsula
FIGURE 1. Distributions of surveys in Northwestern Pacific used to Pandalid investigations: A—Western Kamchatka shelf, B—Avacha Gulf, C—Oliutorsko-Navarinsky region, D—Gulf of Anadyr.
FIGURE 14 in Morphological features of larvae of Pandalus eous, P. goniurus, and P. tridents (Decapoda, Pandalidae) from planktonic samples taken in marine waters near Kamchatka Peninsula
FIGURE 14. Morphology features of Pandalus goniurus. Fifth zoeal stage. Abbreviations above in Materials and methods. Scale: 1 mm.
FIGURE 8 in Morphological features of larvae of Pandalus eous, P. goniurus, and P. tridents (Decapoda, Pandalidae) from planktonic samples taken in marine waters near Kamchatka Peninsula
FIGURE 8. Morphology features of Pandalus eous. Seventh zoeal stage. Abbreviations above in Materials and methods. Scale: 1 mm.
FIGURE 10 in Morphological features of larvae of Pandalus eous, P. goniurus, and P. tridents (Decapoda, Pandalidae) from planktonic samples taken in marine waters near Kamchatka Peninsula
FIGURE 10. Morphology features of Pandalus goniurus. First zoeal stage. Abbreviations above in Materials and methods. Scale: 1 mm.
FIGURE 12 in Morphological features of larvae of Pandalus eous, P. goniurus, and P. tridents (Decapoda, Pandalidae) from planktonic samples taken in marine waters near Kamchatka Peninsula
FIGURE 12. Morphology features of Pandalus goniurus. Third zoeal stage. Abbreviations above in Materials and methods. Scale: 1 mm.
FIGURE 18 in Morphological features of larvae of Pandalus eous, P. goniurus, and P. tridents (Decapoda, Pandalidae) from planktonic samples taken in marine waters near Kamchatka Peninsula
FIGURE 18. Morphology features of Pandalus tridens. Second zoeal stage. Abbreviations above in Materials and methods. Scale: 1 mm.
FIGURE 19 in Morphological features of larvae of Pandalus eous, P. goniurus, and P. tridents (Decapoda, Pandalidae) from planktonic samples taken in marine waters near Kamchatka Peninsula
FIGURE 19. Morphology features of Pandalus tridens. Third zoeal stage. Abbreviations above in Materials and methods. Scale: 1 mm.
FIGURE 22 in Morphological features of larvae of Pandalus eous, P. goniurus, and P. tridents (Decapoda, Pandalidae) from planktonic samples taken in marine waters near Kamchatka Peninsula
FIGURE 22. Morphology of antennae of P. goniurus (A, after Haynes, 1978) and P. eous (B, after Haynes, 1979). Scale: 0.5 mm.
FIGURE 5 in Morphological features of larvae of Pandalus eous, P. goniurus, and P. tridents (Decapoda, Pandalidae) from planktonic samples taken in marine waters near Kamchatka Peninsula
FIGURE 5. Morphology features of Pandalus eous. Fourth zoeal stage. Abbreviations above in Materials and methods. Scale: 1 mm.
Data from: Genetically distinct populations of northern shrimp, Pandalus borealis, in the North Atlantic: adaptation to different temperatures as an isolation factor
The large-scale population genetic structure of northern shrimp, Pandalus borealis, was investigated over the species' range in the North Atlantic, identifying multiple genetically distinct groups. Genetic divergence among sample localities varied among 10 microsatellite loci (range: FST = −0.0002 to 0.0475) with a highly significant average (FST = 0.0149; P < 0.0001). In contrast, little or no genetic differences were observed among temporal replicates from the same localities (FST = 0.0004; P = 0.33). Spatial genetic patterns were compared to geographic distances, patterns of larval drift obtained through oceanographic modelling, and temperature differences, within a multiple linear regression framework. The best-fit model included all three factors and explained approximately 29% of all spatial genetic divergence. However, geographic distance and larval drift alone had only minor effects (2.5–4.7%) on large-scale genetic differentiation patterns, whereas bottom temperature differences explained most (26%). Larval drift was found to promote genetic homogeneity in parts of the study area with strong currents, but appeared ineffective across large temperature gradients. These findings highlight the breakdown of gene flow in a species with a long pelagic larval phase (up to 3 months) and indicate a role for local adaptation to temperature conditions in promoting evolutionary diversification and speciation in the marine environment.
Data from: Genetically distinct populations of northern shrimp, Pandalus borealis, in the North Atlantic: adaptation to different temperatures as an isolation factor
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DNA-metabarcoding reveals the importance of gelatinous zooplankton in the diet of Pandalus borealis, a keystone species in the Arctic
<p>Information about the dietary composition of species is crucial to understand their position and role in the food web. Stomach content analysis (SCA) and stable isotope analysis (SIA) are commonly used to study marine trophic relationships. SCA can provide high taxonomic resolution but requires taxonomic expertise and frequently underestimates digestible taxa. SIA provides a time-integrated view of the dietary sources but often lacks in taxonomic resolution. The use of molecular approaches such as DNA-metabarcoding may alleviate these problems. Here, we used DNA-metabarcoding with universal primers for cytochrome c oxidase I (COI), to study the diet composition of the Northern shrimp (<i>Pandalus borealis</i>) from the Barents Sea, a keystone species in the Arctic region with large socio-economic importance. Across locations, jellyfish and chaetognaths were the most important components in the diet of <i>P. borealis</i>, jointly accounting for 40-60% of the total read abundance. This dietary importance of gelatinous zooplankton contrasts sharply with published results based on SCA. At the same time, diet composition differed between fjord and shelf locations, pointing to different food webs supporting <i>P. borealis</i> in these two systems. Our study underscores the potential of molecular approaches to provide important new insights into the diet of marine invertebrates that are difficult or impossible to obtain with traditional methods, and calls for a revision of the role of gelatinous zooplankton in the diet of the key Arctic species <i>P. borealis</i>, and in extension, Arctic food webs.</p>
DNA-metabarcoding reveals the importance of gelatinous zooplankton in the diet of Pandalus borealis, a keystone species in the Arctic
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