筛选
科学数据
统计数据
共检索到41条 ,权限内显示50条;
: Coregonidae)
- 负责人：
- DOI：
- doi:10.5061/dryad.pd2tq5g
- 摘要：
- x known species: Coregonus steinmanni sp. nov. occurs in both lakes; Coregonus profundus sp. nov. and Coregonus acrinasus sp. nov. are endemic to Lake Thun
Data from: Rapid buildup of sympatric species diversity in Alpine whitefish
- 负责人：
- DOI：
- doi:10.5061/dryad.k183ft7
- 摘要：
- Adaptive radiations in postglacial fish offer excellent settings to study the evolutionary mechanisms involved in the rapid buildup of sympatric species diversity from a single lineage. Here, we address this by exploring the genetic and ecological structure of the largest Alpine whitefish radiation known, that of Lakes Brienz and Thun, using microsatellite data of more than 2000 whitefish caught during extensive species?targeted and habitat?randomized fishing campaigns. We find six strongly genetically and ecologically differentiated species, four of which occur in both lakes, and one of which was previously unknown. These four exhibit clines of genetic differentiation that are paralleled in clines of eco?morphological and reproductive niche differentiation, consistent with models of sympatric ecological speciation along environmental gradients. In Lake Thun, we find two additional species, a profundal specialist and a species introduced in the 1930s from another Alpine whitefish radiation. Strong genetic differentiation between this introduced species and all native species of Lake Thun suggests that reproductive isolation can evolve among allopatric whitefish species within 15,000 years and persist in secondary sympatry. Consistent with speciation theory, we find stronger correlations between genetic and ecological differentiation for sympatrically than for allopatrically evolved species.
Data from: A de novo chromosome-level genome assembly of Coregonus sp. “Balchen”: one representative of the Swiss Alpine whitefish radiation
- 负责人：
- DOI：
- doi:10.5061/dryad.xd2547ddf
- 摘要：
- out PacBio sequencing from one wild-caught Coregonus sp. “Balchen” from Lake Thun to ~90x coverage. PacBio reads were assembled independently using thr
Data from: Anthropogenic hybridization between endangered migratory and commercially harvested stationary whitefish taxa (Coregonus spp.)
- 负责人：
- DOI：
- doi:10.5061/dryad.n62dm
- 摘要：
- Natural hybridization plays a key role in the process of speciation. However, anthropogenic (human induced) hybridization of historically isolated taxa raises conservation issues. Due to weak barriers to gene flow and the presence of endangered taxa, the whitefish species complex is an excellent study system to investigate the consequences of hybridization in conservation. We focused on three naturally reproductively isolated whitefish taxa in Germany: the endangered, anadromous North Sea houting (NSH) and Baltic houting (BH), which were reintroduced after local extinction, and the commercially stocked European whitefish (EW). To evaluate the genetic integrity of each taxon, source and reintroduced populations of NSH and BH, and EW populations were characterized based on two mitochondrial and 17 microsatellite loci. Additionally, we investigated gill raker counts as an adaptive phenotypic trait. Even though clear genetic and phenotypic differentiation confirmed the houtings as separate evolutionarily significant units, admixture analyses revealed an extensive hybrid zone. Hybridizations were introgressive, positively correlated with genetic diversity, and were reflected in the gill raker counts. The BH distribution range showed higher heterogeneity and stronger admixture than the NSH range. Erroneous stocking with non-native genotypes best explained these patterns, which pose challenges for the conservation of the endangered NSH and BH.
Data from: Genomic insights into the vulnerability of sympatric whitefish species flocks
- 负责人：
- DOI：
- doi:10.5061/dryad.gp25h48
- 摘要：
- by anthropogenic perturbation. Here, we analyse three sympatric whitefish species (Coregonus spp) sampled across two neighbouring and connected Swiss pre
Data from: Addressing incomplete lineage sorting and paralogy in the inference of uncertain salmonid phylogenetic relationships
- 负责人：
- DOI：
- doi:10.25338/B8DC81
- 摘要：
- relationships: (1) subfamily branching, (2) monophyly of?Coregonus, and (3) placement of?Parahucho. Coregoninae and Thymallinae are resolved
Data from: Phenotype-environment association of the oxygen transport system in trimorphic European whitefish (Coregonus lavaretus) populations
- 负责人：
- DOI：
- doi:10.5061/dryad.351h3
- 摘要：
- o the eco-evolutionary dynamics that lead to the formation of new species. Here, we show that in trimorphic adaptive radiations of European whitefish (Coregonus
Data from: Additive genetic variation for tolerance to estrogen pollution in natural populations of Alpine whitefish (Coregonus sp., Salmonidae)
- 负责人：
- DOI：
- doi:10.5061/dryad.md103
- 摘要：
- The evolutionary potential of natural populations to adapt to anthropogenic threats critically depends on whether there exists additive genetic variation for tolerance to the threat. A major problem for water-dwelling organisms is chemical pollution, and among the most common pollutants is 17?-ethinylestradiol (EE2), the synthetic estrogen that is used in oral contraceptives and that can affect fish at various developmental stages, including embryogenesis. We tested whether there is variation in the tolerance to EE2 within Alpine whitefish. We sampled spawners from two species of different lakes, bred them in vitro in a full-factorial design each, and studied growth and mortality of embryos. Exposure to EE2 turned out to be toxic in all concentrations we tested (?1 ng/L). It reduced embryo viability and slowed down embryogenesis. We found significant additive genetic variation in EE2-induced mortality in both species, that is, genotypes differed in their tolerance to estrogen pollution. We also found maternal effects on embryo development to be influenced by EE2, that is, some maternal sib groups were more susceptible to EE2 than others. In conclusion, the toxic effects of EE2 were strong, but both species demonstrated the kind of additive genetic variation that is necessary for an evolutionary response to this type of pollution.
Data from: Standing chromosomal variation in Lake Whitefish species pairs: the role of historical contingency and relevance for speciation
- 负责人：
- DOI：
- doi:10.5061/dryad.tg0mt
- 摘要：
- r appearance. We tested a potential relationship between chromosome changes and speciation by studying two Lake Whitefish (Coregonus clupeaformis) lineages tha
Data from: Maternal and paternal contributions to pathogen resistance dependent on development stage in a whitefish (Salmonidae)
- 负责人：
- DOI：
- doi:10.5061/dryad.t91gr
- 摘要：
- from ecological effects, we sampled a natural population of the whitefish Coregonus palaea, used gametes for full-factorial in vitro fertilization
