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Data from: Species introduction promotes hybridization and introgression in Coregonus: is there sign of selection against hybrids?
- 负责人：
- Kahilainen, Kimmo K
- DOI：
- doi:10.5061/dryad.83n0t
- 摘要：
- . We examined two well-recognized fish species, native whitefish (Coregonus lavaretus) and introduced vendace (C. albula), as well as their morphological hybrids
Data from: Testing the devil's impact on southern Baltic and North Sea basin whitefish (Coregonus spp.) diversity
- 负责人：
- Mehner, Thomas
- DOI：
- doi:10.5061/dryad.4d79f7h
- 摘要：
- Background: The diversity and phylogeny of whitefish of the genus Coregonus is complex, and includes many endemic species of high
Data from: Oxidative phosphorylation gene transcription in whitefish species pairs reveals patterns of parallel and non-parallel physiological divergence
- 负责人：
- DOI：
- doi:10.5061/dryad.s4kc8
- 摘要：
- Across multiple lakes in North America, lake whitefish (Coregonus clupeaformis) have independently evolved “dwarf” and “normal” sympatric species
Data from: Convergence in organ size but not energy metabolism enzyme activities among wild Lake Whitefish (Coregonus clupeaformis) species pairs
- 负责人：
- DOI：
- doi:10.5061/dryad.686sq
- 摘要：
- The repeated evolution of similar phenotypes by similar mechanisms can be indicative of local adaptation, constraints or biases in the evolutionary process. Little is known about the incidence of physiological convergence in natural populations, so here we test whether energy metabolism in ‘dwarf’ and ‘normal’ Lake Whitefish evolves by similar mechanisms. Prior genomic and transcriptomic studies have found that divergence in energy metabolism is key to local adaptation in whitefish species pairs, but that distinct genetic and transcriptomic changes often underlie phenotypic evolution among lakes. Here, we predicted that traits at higher levels of biological organization, including the activities of energy metabolism enzymes (the product of enzyme concentration and turnover rate) and the relative proportions of metabolically active tissues (heart, liver, skeletal muscle), would show greater convergence than genetic and transcriptomic variation. We compared four whitefish species pairs and found convergence in organ size whereby all dwarf whitefish populations have a higher proportion of red skeletal muscle, three have relatively larger livers and two have relatively larger ventricles than normal fish. On the other hand, hepatic and muscle enzyme activities showed little convergence and were largely dependent on lake of origin. Only the most genetically divergent species pair (Cliff Lake) displayed white muscle enzyme activities matching results from laboratory-reared normal and dwarf whitefish. Overall, these data show convergence in the evolution of organ size, but not in the activities of candidate enzymes of energy metabolism, which may have evolved mainly as a consequence of demographic or ecological differences among lakes.
Data from: Parallelism in the oxygen transport system of the lake whitefish: the role of physiological divergence in ecological speciation
- 负责人：
- DOI：
- doi:10.5061/dryad.675tt
- 摘要：
- In North America, populations of lake whitefish (Coregonus clupeaformis) have evolved sympatric “dwarf” and “normal” ecotypes that ar
Data from: Sperm pre-fertilization thermal environment shapes offspring phenotype and performance
- 负责人：
- 关键词：
- Coregonus lavaretus
- DOI：
- doi:10.5061/dryad.25rg2h3
- 摘要：
- thermal environment in a cold-adapted salmonid, the European whitefish (Coregonus lavaretus L.). We used a full-factorial breeding design where the eggs of five females
Data from: MHC class I expression dependent on bacterial infection and parental factors in whitefish embryos (Salmonidae)
- 负责人：
- DOI：
- doi:10.5061/dryad.5sp75
- 摘要：
- of the lake whitefish Coregonus palaea. In order to experimentally separate paternal (i.e. genetic) from maternal and environmental effects, and determine whether
Data from: Managing cryptic biodiversity: Fine-scale intralacustrine speciation along a benthic gradient in Alpine whitefish (Coregonus spp.)
- 负责人：
- Hudson, Alan
- 关键词：
- Conservation Genetics Fisheries Management Population Genetics - Empirical Speciation Ecological Genetics Phylogeography pelagic intermediate benthic intermediate
- DOI：
- doi:10.5061/dryad.7g2c9
- 摘要：
- Whitefish (Coregonus spp.) are an important catch for many freshwater fisheries, particularly in Switzerland. In support of this, supplemental
Data from: Nonparallelism in MHC II? diversity accompanies nonparallelism in pathogen infection of lake whitefish (Coregonus clupeaformis) species
- 负责人：
- DOI：
- doi:10.5061/dryad.ft94b
- 摘要：
- Major histocompatibility (MHC) immune system genes may evolve in response to pathogens in the environment. Because they also may affect mate choice, they are candidates for having great importance in ecological speciation. Here, we use next-generation sequencing to test the general hypothesis of parallelism in patterns of MHCII? diversity and bacterial infections among five dwarf and normal whitefish sympatric pairs. A second objective was to assess the functional relationships between specific MHCII? alleles and pathogens in natural conditions. Each individual had between one and four alleles, indicating two paralogous loci. In Cliff Lake, the dwarf ecotype was monomorphic for the most common allele. In Webster Lake, the skew in the allelic distribution was towards the same allele but in the normal ecotype, underscoring the nonparallel divergence among lakes. Our signal of balancing selection matched putative peptide binding region residues in some cases, but not in others, supporting other recent findings of substantial functional differences in fish MHCII? compared with mammals. Individuals with fewer alleles were less likely to be infected; thus, we found no evidence for the heterozygote advantage hypothesis. MHCII? alleles and pathogenic bacteria formed distinct clusters in multivariate analyses, and clusters of certain alleles were associated with clusters of pathogens, or sometimes the absence of pathogens, indicating functional relationships at the individual level. Given that patterns of MHCII? and bacteria were nonparallel among dwarf and normal whitefish pairs, we conclude that pathogens driving MHCII? evolution did not play a direct role in their parallel phenotypic evolution.
Data from: Echinorhynchus salmonis Müller, 1784 (Acanthocephala: Echinorhynchidae) from the Bothnian Bay, Baltic Sea: morphological variability and radial asymmetry of proboscis hooks
- 负责人：
- 关键词：
- parasitology parasite scanning electron microscopy morphology anatomy morphometric meristic animal parasitosis helminthiasis fish disease
- DOI：
- doi:10.5061/dryad.v21k1
- 摘要：
- Coregonus lavaretus L. and smelt Osmerus eperlaus (L.) from the Bothnian Bay, northern Baltic Sea. Morphological data were compared with published descriptions
