ArticleMolecular ecology2022
High levels of inbreeding with spatial and host-associated structure in lice of an endangered freshwater seal.
Article in Molecular ecology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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9 citing papers in PubMed, 13 citations in OpenAlex.
- Host Co-Occurrence and Population Size Explain Genetic Differentiation and Diversity in Seal Lice.Molecular ecology · 2025Article
- Population genomics of seal lice provides insights into the postglacial history of northern European seals.Molecular ecology · 2024Article
- Population Genomics of Pooled Samples: Unveiling Symbiont Infrapopulation Diversity and Host-Symbiont Coevolution.Life (Basel, Switzerland) · 2023Article
- First Insights into Population Structure and Genetic Diversity Versus Host Specificity in Trypanorhynch Tapeworms Using Multiplexed Shotgun Genotyping.Genome biology and evolution · 2023Article
- Loss of species and genetic diversity during colonization: Insights from acanthocephalan parasites in northern European seals.Ecology and evolution · 2023Article
- Host body size, not host population size, predicts genome-wide effective population size of parasites.Evolution letters · 2023Article
- Draft genome assemblies of the avian louse Brueelia nebulosa and its associates using long-read sequencing from an individual specimen.G3 (Bethesda, Md.) · 2023Article
- Genomic Approaches to Uncovering the Coevolutionary History of Parasitic Lice.Life (Basel, Switzerland) · 2022Review
- High levels of inbreeding with spatial and host-associated structure in lice of an endangered freshwater seal.Molecular ecology · 2022Article
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6 authors at 4 institutions in 3 countries.
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No grant is acknowledged in the PubMed record.
Abstract
Host-specialist parasites of endangered large vertebrates are in many cases more endangered than their hosts. In particular, low host population densities and reduced among-host transmission rates are expected to lead to inbreeding within parasite infrapopulations living on single host individuals. Furthermore, spatial population structures of directly-transmitted parasites should be concordant with those of their hosts. Using population genomic approaches, we investigated inbreeding and population structure in a host-specialist seal louse (Echinophthirius horridus) infesting the Saimaa ringed seal (Phoca hispida saimensis), which is endemic to Lake Saimaa in Finland, and is one of the most endangered pinnipeds in the world. We conducted genome resequencing of pairs of lice collected from 18 individual Saimaa ringed seals throughout the Lake Saimaa complex. Our analyses showed high genetic similarity and inbreeding between lice inhabiting the same individual seal host, indicating low among-host transmission rates. Across the lake, genetic differentiation among individual lice was correlated with their geographic distance, and assignment analyses revealed a marked break in the genetic variation of the lice in the middle of the lake, indicating substantial population structure. These findings indicate that movements of Saimaa ringed seals across the main breeding areas of the fragmented Lake Saimaa complex may in fact be more restricted than suggested by previous population-genetic analyses of the seals themselves.
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