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13 results for “Hucho”
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.
Fig. 2 in The First Appearance Of Hucho (Salmonidae) In The Fossil Record Of Eastern Europe
Fig. 2. Left opercular bone of Hucho sp., NMNHU-P 41/3079, Tretya Krucha: a — medial view; b — lateral view. Scale bar 5 mm.
Fig. 3 in The First Appearance Of Hucho (Salmonidae) In The Fossil Record Of Eastern Europe
Fig. 3. Remains of Hucho sp. from the late Miocene localities of southern Ukraine: a, a 1 — fragment of left opercular bone, NMNHU-P 41/3746, Kubanka 2 (a— medial view; a1— lateral view). Scale bar 5 mm; b, c — isolated jaw teeth, NMNHU-P 45/5699–5700, Cherevychnoe 3. Scale bar 2 mm.
Fig. 1 in The First Appearance Of Hucho (Salmonidae) In The Fossil Record Of Eastern Europe
Fig. 1. Localities of the late Miocene huchen remains in Ukraine: 1 — Kubanka 2; 2 — Cherevychnoe 3; 3 — Tretya Krucha.
Estimating the inbreeding level and genetic relatedness in an isolated population of critically endangered Sichuan taimen (Hucho bleekeri) using genome wide SNP markers
<p>Sichuan taimen (Hucho bleekeri) is critically endangered fish listed in The Red List of Threatened Species compiled by the International Union for Conservation of Nature (IUCN). Specific locus amplified fragment sequencing (SLAF-seq)-based genotyping was performed for Sichuan taimen with 43 yearling individuals from 3 locations in Taibai River (a tributary of Yangtze River) that has been sequestered from its access to the ocean for more than 30 years since late 1980s. Applying the inbreeding level and genetic relatedness estimation using 15,396 genome wide SNP markers, we found that the inbreeding level of this whole isolated population was at a low level (average F=2.6×10-3±0.079), and the means of coancestry coefficients within and between the three sampling locations were all very low (close to 0), too. Genomic differentiation was negatively correlated with the geographical distances between the sampling locations (p < 0.001) and the 43 individuals could be considered as genetically independent two groups. The low levels of genomic inbreeding and relatedness indicated a relatively large number of sexually mature individuals were involved in reproduction in Taibai River. This study suggested a genomic-relatedness-guided breeding and conservation strategy for wild fish species without pedigree information records.</p>
Estimating the inbreeding level and genetic relatedness in an isolated population of critically endangered Sichuan taimen (Hucho bleekeri) using genome wide SNP markers
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Data from: De novo assembly and characterization of the Hucho taimen transcriptome
Taimen (Hucho taimen) is an important ecological and economic species that is classified as vulnerable by the IUCN Red List of Threatened Species; however, limited genomic information is available on this species. RNA-Seq is a useful tool for obtaining genetic information and developing genetic markers for non-model species in addition to its application in gene expression profiling. In this study, we performed a comprehensive RNA-Seq analysis of taimen. We obtained 157 M clean reads (14.7 Gb) and used them to de novo assemble a high-quality transcriptome with a N50 size of 1060 bp. In the assembly, 82% of the transcripts were annotated using several databases, and 14,666 of the transcripts contained a full open reading frame. The assembly covered 75% of the transcripts of Atlantic salmon and 57.3% of the protein-coding genes of rainbow trout. To learn about the genome evolution, we performed a systematic comparative analysis across 11 teleosts including 8 salmonids, and found 313 unique gene families in taimen. Using Atlantic salmon and rainbow trout transcriptomes as the background, we identified 250 positive selection transcripts. The pathway enrichment analysis revealed a unique characteristic of taimen: it possesses more immune-related genes than Atlantic salmon and rainbow trout; moreover, some genes have undergone strong positive selection. We also developed a pipeline for identifying microsatellite marker genotypes in samples, and successfully identified 24 polymorphic microsatellite markers for taimen. These data and tools are useful for studying conservation genetics, phylogenetics, evolution among salmonids and selective breeding for threatened taimen.
Fig. 2 in Current Distribution Of The European Grayling, Thymallus Thymallus, And Huchen, Hucho Hucho, In The Transcarpatian Region Of Ukraine
Fig. 2. Distribution of the huchen, Hucho hucho, 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 huchen were actually caught and/or recorded during scientific surveys, in recreational or poacher's fishing gears, places of introduction — sites were huchen were released intentionally or escaped accidentally.
Hierarchical genetic structure and implications for conservation of the world's largest salmonid, Hucho taimen
<p>Population genetic analyses can evaluate how evolutionary processes shape diversity and inform conservation and management of imperiled species. Taimen (<i>Hucho taimen</i>), the world's largest freshwater salmonid, is threatened, endangered, or extirpated across much of its range due to anthropogenic activity including overfishing and habitat degradation. We generated genetic data using high throughput sequencing of reduced representation libraries for taimen from multiple drainages in Mongolia and Russia. Nucleotide diversity estimates were within the range documented in other salmonids, suggesting moderate diversity despite widespread population declines. Similar to other recent studies, our analyses revealed pronounced differentiation among the Arctic (Selenge) and Pacific (Amur and Tugur) drainages, suggesting historical isolation among these systems. However, we found evidence for finer-scale structure within the Pacific drainages, including unexpected differentiation between tributaries and the mainstem of the Tugur River. Differentiation across the Amur and Tugur basins together with coalescent-based demographic modeling suggests the ancestors of Tugur tributary taimen likely diverged in the eastern Amur basin, prior to eventual colonization of the Tugur basin. Our results suggest the potential for differentiation of<i> </i>taimen<i> </i>at different geographic scales, and suggest more thorough geographic and genomic sampling may be needed to inform conservation and management of this iconic salmonid.</p>
Data from: De novo assembly and characterization of the Hucho taimen transcriptome
Open the record for dataset details and reuse information.
Hierarchical genetic structure and implications for conservation of the world’s largest salmonid, Hucho taimen
Open the record for dataset details and reuse information.
Figure 1 in Hucho hucho (Linnaeus, 1758): last natural viable population in the Eastern Carpathians - conservation elements
Figure 1. Location of the 370 sampling stations in the nature park.
Figure 2. H in Hucho hucho (Linnaeus, 1758): last natural viable population in the Eastern Carpathians - conservation elements
Figure 2. H. hucho capture locations.
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