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9 results for “Coregonus albula”
Fig.5 in Genetic And Morphological Variability Of Small Vendace (Coregonus Albula (Linnaeus, 1758)) Population In Three Latvian Lakes
Fig.5. Principal component analysis (PCA) plot of the genetic structuring among the three vendace populations. A). PC1 and PC2 explain 25.50% and 21.88% of the total variation, respectively (by allozyme markers); B). PC1 and PC2 explain 19.52% and 13.73% of the total variation, respectively (by RAPD markers).
Fig. 4 in Genetic And Morphological Variability Of Small Vendace (Coregonus Albula (Linnaeus, 1758)) Population In Three Latvian Lakes
Fig. 4. Number of RAPD loci and gene diversity of Coregonus albula in three Latvian lakes, based on RAPD markers.
Fig.3 in Genetic And Morphological Variability Of Small Vendace (Coregonus Albula (Linnaeus, 1758)) Population In Three Latvian Lakes
Fig.3. Allelic richness and polymorphism in Coregonus albula populations in studied lakes based on allozyme markers.
Data from: Evolution and disappearance of sympatric Coregonus albula in a changing environment - a case study of the only remaining population pair in Sweden
<p>During the past 50 years Fennoscandian populations of spring-spawning Baltic cisco (<em>Coregonus albula</em>), sympatric to common autumn-spawners, have declined or disappeared; e.g., three out of four known spring-spawning populations in Sweden are regarded as extinct. Over the same period, climate has changed and populations have been subject to other anthropogenic stressors. We compared historic (1960s) and recent (1990-2000s) morphological data from the still existent sympatric cisco populations in Lake Fegen, Sweden. Phenotypic changes were found for spring-spawners making them more similar to the sympatric autumn-spawners (that had remained virtually unchanged). Based on results for other salmoniform fishes, a phenotypically plastic response to increased temperature during early development appears unlikely. The recent material was also analysed with microsatellite markers; long-term effective population size in spring-spawners was estimated to be about 20 times lower than autumn-spawners, with signs of long-term gene flow in both directions and a recent genetic bottleneck in spring-spawners. The change towards a less distinct phenotype in spring-spawners is suggested to reflect a recent increase in gene flow from autumn-spawners. Time since divergence was estimated to only c. 1 900 years (95% CI: 400 – 5 900), but still the Fegen populations represent the most morphologically and genetically distinct sympatric populations studied. Consequently, we hypothesise that less distinct population pairs can be even younger, and that spring-spawning may have repeatedly evolved and disappeared in several lakes since the end of the last glaciation, concurrent with changed environmental conditions.</p>
Fig. 1 in Genetic And Morphological Variability Of Small Vendace (Coregonus Albula (Linnaeus, 1758)) Population In Three Latvian Lakes
Fig. 1. The location of sampling sites. - Lake Sventes, Lake Nirzas and Lake Rāznas.
Data from: Evolution and disappearance of sympatric Coregonus albula in a changing environment - a case study of the only remaining population pair in Sweden
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Fig. 1 in Morphological specificities of vendace (Salmoniformes: Salmonidae: Coregoninae: Coregonus albula) population in Lake Pleshcheyevo (the Volga River basin): relationships of two phylogenetic lineages in a new zone of secondary contact
Fig. 1 Map of European north of Russia marking the selected sampling location. 1, 2—Lake Goreloye [16] and Lake Bol'shoye Krasnoye [35] (Bol'shoy Solovetsky Island); 3—Lake Beloye [16]; 4—Lake Pleshcheyevo: lineages E [44] and ALBP2 [29]; 5—Lake Vishtynetskoye (Kaliningrad region) [28]. In square brackets, the sample size is shown
Fig. 3 in Morphological specificities of vendace (Salmoniformes: Salmonidae: Coregoninae: Coregonus albula) population in Lake Pleshcheyevo (the Volga River basin): relationships of two phylogenetic lineages in a new zone of secondary contact
Fig. 3 Plots of scores for the first two discriminant functions for size-free morphometric data for six vendace (C. albula) groups. 1—Lake Pleshcheyevo, lineage E; 2—Lake Pleshcheyevo, lineage ALBP2; 3—Lake Goreloye; 4—Lake Bol'shoye Krasnoye; 5—Lake Vishtynetskoye; 6—Lake Beloye. 95% confidence ellipses are shown
Fig. 2 in Genetic And Morphological Variability Of Small Vendace (Coregonus Albula (Linnaeus, 1758)) Population In Three Latvian Lakes
Fig. 2. Relationship between the total length and weight of vendace individuals in studied lakes.
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