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29 results for “Thymallus”
Background data 'Effect of biotic dependencies in species distribution models: The future distribution of Thymallus thymallus under consideration of Allogamus auricollis'
<p>Background data of the paper 'Effect of biotic dependencies in species distribution models: The future distribution of Thymallus thymallus under consideration of Allogamus auricollis'</p>
Fig. 1 in Current Distribution Of The European Grayling, Thymallus Thymallus, And Huchen, Hucho Hucho, In The Transcarpatian Region Of Ukraine
Fig. 1. Distribution of the European grayling, Thymallus thymallus, in the Transcarpatian Region of Ukraine:potential distribution — information obtained from interviewing inspectors of the Transcarpathian Fish Protection Inspection, forestry inspectors, and local people; places of catches — sites, where European grayling were actually caught and/or recorded during scientific surveys, in recreational or poacher's fishing gears.
Figure 2. – Maximum Likelihood phylogenetic tree inferred with the 13 in The complete mitochondrial genome of Thymallus thymallus (Linnaeus, 1758) (Actinopterygii, Salmonidae) obtained by long range PCRs and double multiplexing
Figure 2. – Maximum Likelihood phylogenetic tree inferred with the 13 protein coding genes. The values of bootstrap are represent- ed beside the nodes.
Figure 6 in A third European species of grayling (Actinopterygii, Salmonidae), endemic to the Loire River basin (France), Thymallus ligericus n. sp.
Figure 6. – Dorsal fin on a live paratype of Thymallus ligericus n. sp. MNHN 2018-0726, 290 mm SL ♀, Lignon River at Boën-surLignon, 29 May 2015, Persat, Juglaret and Buttazzoni coll.
Figure 4 in A third European species of grayling (Actinopterygii, Salmonidae), endemic to the Loire River basin (France), Thymallus ligericus n. sp.
Figure 4. – Mouth in ventral view of Thymallus spp. A: Holotype of Thymallus ligericus n. sp. MNHN 2018-0722, 337 mm SL J, Alagnon River at La Chapelle d'Alagnon, 9 Sep. 2016, Persat and FDAAPPMA15 coll.; B: Thymallus thymallus UCBLZ 2012.9.1010, 376 mm TL, Rhône drainage, Ain River at Crotenay, 10 Jun. 2014, Persat and FDAAPPMA39 coll.
Figure 2 in A third European species of grayling (Actinopterygii, Salmonidae), endemic to the Loire River basin (France), Thymallus ligericus n. sp.
Figure 2. – Specimens of Thymallus spp. in lateral view. Holotype of Thymallus ligericus n. sp. MNHN 2018- 0722, 337 mm SL J, Alagnon River at La Chapelle d'Alagnon, 9 Sep. 2016, Persat and FDAAPPMA 15 coll., in live (A) and after preservation (B); Paratype of Thymallus ligericus n. sp. MNHN 2019-0267 (C), 269 mm SL ♀, Loire River at Chadron, 22 Sep. 2016, Persat and ONEMA43 coll; UCBLZ – 2012.9.1011 (D), 292 mm TL, Rhône drainage, Ain River at Crotenay, 10 Jun. 2014, Persat and FDAAPPMA39 coll.
Figure 1 in A third European species of grayling (Actinopterygii, Salmonidae), endemic to the Loire River basin (France), Thymallus ligericus n. sp.
Figure 1. – The three supplementary measurements made on the ventral side of the head, in addition to those of Surre et al. (1986): the mandible width, the chin length (from the basibranchial junction to the extremity of the mandible) and the ventral snout length (from the same point to the extremity of the snout).
Figure 3 in A third European species of grayling (Actinopterygii, Salmonidae), endemic to the Loire River basin (France), Thymallus ligericus n. sp.
Figure 3. – Head profiles of Thymallus spp. A: Paratype of Thymallus ligericus n. sp. MNHN 2018-0728, 300 mm SL J, Dore River at Vertolaye, 29 May 2015, Persat, Juglaret and Buttazzoni coll.; B: Thymallus thymallus UCBLZ – 2012.9.1010, 376 mm TL, Rhône drainage, Ain River at Crotenay, 10 Jun. 2014, Persat and FDAAPPMA39 coll.
Fig. 1 in Global systematic diversity, range distributions, conservation and taxonomic assessments of graylings (Teleostei: Salmonidae; Thymallus spp.)
Fig. 1 Map showing the global distribution range of Thymallus species. Information on sampling sites and species is given in Table S1. Numbers in the map refer to known contact zones of the following species: 1 = T. arcticus s.l. and T. baicalensis in the lower Enisei River; 2 = T. arcticus s.l. and T. baicalolenensis in the lower Lena River; 3 = T. nikolskyi and T. baicalensis in tributaries of the upper Ob River; 4 = T. baicalolenensis and T. baicalensis in tributaries of Lake Baikal; 5 = T. grubii, T. tugarinae
Figure 5 in Genetic integrity of the European grayling (Thymallus thymallus) populations within the Vienne River drainage basin after five decades of stockings
Figure 5 - Results of the Structure analysis (Q-values) for 8 loci (A) and 10 loci (B). Colours represent the different "k" units chosen using the approach of Evanno et al. (2005). Population names are shown on the x-axis, and Q-values (contribution or assignment from each k partition) are shown on the Y-axis. For 8 loci, k = 8, and for 10 loci k = 11.
Figure 2 in Genetic integrity of the European grayling (Thymallus thymallus) populations within the Vienne River drainage basin after five decades of stockings
Figure 2. - Close-up of grayling distribution and four sampled sites (stars) within the upper Vienne district in 2012 (relief background from IGN-Geoportail).
Figure 4 in Genetic integrity of the European grayling (Thymallus thymallus) populations within the Vienne River drainage basin after five decades of stockings
Figure 4. - Factorial Correspondence Analyses (FCA) of individuals based on the presence and absence of microsatellite alleles. A: Bi-variate plot of the first two FCA factors (F1 & F2), graphically partitioned by population. B: Bi-variate plot of the third and fourth FCA factors (F3 & F4) partitioned by population. The percentage inertia for each factor is as follows: FC1 = 4.44%; FC2 = 4.03%; FC3 = 3.46%; FC4 = 2.82%.
Figure 1 in Genetic integrity of the European grayling (Thymallus thymallus) populations within the Vienne River drainage basin after five decades of stockings
Figure 1. - Distribution of grayling in Europe (green) and its former distribution in France around 1900 (red). Sample sites (white stars = wild populations, black stars = hatcheries) are numbered following table II.
Figure 3 in Genetic integrity of the European grayling (Thymallus thymallus) populations within the Vienne River drainage basin after five decades of stockings
Figure 3. - Median Joining network of haplotypes found in this study augmented by additional published haplotypes provided for reference. All new haplotypes use the simple abbreviation "Ht" with a serial number reflecting the order in which they were first found in our data. The small black dots indicate substitutional steps whereas the small red dots represent multifurcating nodes. The following haplotypes and corresponding clade names stem from Weiss et al. (2002). "Danube drainage (Northern Alps)": Da1, Da2, Da4, Da11; "Mixed Central Europe": Rh1, Rh4, Rh6 all first reported from the Rhone basin; "Mixed Central Europe": At14, At15 both frequent and widespread in the Rhine basin; "Scandinavia": At6 reported from Finland; and AT1 first reported from the Loire River.
Low adaptive potential for tolerance to ethynylestradiol, but also low toxicity, in a grayling population (Thymallus thymallus)
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Data from: Plastic and evolutionary gene expression responses are correlated in European grayling (Thymallus thymallus) sub-populations adapted to different thermal environments
Understanding how populations adapt to changing environmental conditions is a long-standing theme in evolutionary biology. Gene expression changes have been recognized as an important driver of local adaptation, but relatively little is known regarding the direction of change and in particular, about the interplay between plastic and evolutionary gene expression. We have previously shown that the gene expression profiles of European grayling (Thymallus thymallus) populations inhabiting different thermal environments include both plastic and evolutionary components. However, whether the plastic and evolutionary responses were in the same direction was not investigated in detail, nor was the identity of the specific genes involved. In this study, we show that the plastic changes in protein expression in response to different temperatures are highly correlated with the evolutionary response in grayling subpopulations adapted to different thermal environments. This finding provides preliminary evidence that the plastic response most likely facilitates adaptation during the early phases of colonization of thermal environments. The proteins that showed significant changes in expression level between warm and cold temperature treatments were mostly related to muscle development, which is consistent with earlier findings demonstrating muscle mass differentiation between cold and warm grayling populations.
Data from: Genetic parentage analysis confirms a polygynandrous breeding system in the European grayling (Thymallus thymallus)
Knowing the breeding system of a species is important in order to understand individual variation in reproductive success. Large variation in reproductive success and thus reproductive skew strongly impacts on the effective number of breeders and thus the long-term effective population size (Ne). Fishes, in particular species belonging to the salmonid family, exhibit a wide diversity of breeding systems. In general, however, breeding systems are rarely studied in detail in the wild. Here we examine the breeding system of the spring-spawning European grayling Thymallus thymallus from a small Norwegian stream using parentage assignment based on the genotyping of 19 polymorphic microsatellite loci. In total 895 individual grayling fry and 154 mature grayling (57 females and 97 males) were genotyped. A total of 466 offspring were assigned a father, a mother, or a parent pair with a confidence of 90% or higher. Successfully reproducing males had on average 11.9 ± 13.3 (SD) offspring with on average 2.1 ± 1.2 partners, whereas successful females had on average 9.5 ± 12.8 offspring and 2.3 ± 1.5 partners. Parents with more partners also produced more offspring. Thus the grayling breeding system within this small stream revealed a polygynandrous breeding system, similar to what has been observed for many other salmonid fish species. The present study thus unambiguously corroborates a polygynadrous breeding system in the European grayling. This knowledge is critical for managing populations of this species, which has suffered significant local population declines throughout its range over the last several decades.
Influence of beaver mimicry restoration on habitat availability for fishes, including Arctic grayling (Thymallus arcticus)
<p>Beaver-dam-mimicry is an emergent conservation practice. We evaluated the influence of constructed riffles, a unique type of beaver mimicry aimed to store water and allow fish passage, on habitat for fishes in one control reach and one manipulated reach with mimicry structures added. The beaver mimicry reach had deeper pool habitats and deeper and wider riffle habitats compared to an unmanipulated control reach. Dissolved oxygen was similar among reaches, averaging 8.7 ± 0.2 and 8.9 mg/L in the beaver mimicry and control reaches, respectively. Sediment size was also similar among reaches, with a <i>D<sub>50</sub></i> of 8.1 and 10.6 mm in the beaver mimicry and control reaches, respectively. The beaver mimicry reach had little to no overhanging bank vegetation or riparian vegetation shade cover, while the control had 38% of its bank covered by canopy and 56% overhung by vegetation. These riparian characteristics result from a legacy of livestock grazing and lack of consistent vegetation planting during restoration. Longnose dace (<i>Rhinichthys cataractae</i>) and white sucker (<i>Catostomus commersonii</i>) dominated in the beaver mimicry reach, together comprising 70% of the fish assemblage post-structure installation. Arctic grayling (<i>Thymallus arcticus</i>)<b> </b>were not found in the beaver mimicry reach but were present in the control, albeit in small numbers of only 3% of the assemblage post-structure installation. These results highlight the need to consider both in-stream and riparian habitat features for fishes, as well as timescales of both hydrological and ecological outcomes in restoration design.</p>
Data from: Seasonal change in trophic niche of adfluvial arctic grayling (Thymallus arcticus) and coexisting fishes in a high-elevation lake system
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Data from: Genetic parentage analysis confirms a polygynandrous breeding system in the European grayling (Thymallus thymallus)
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