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7 results for “Lontra canadensis”
Fig. 4 in Otterly diverse - A high diversity of Dracunculus species (Spirurida: Dracunculoidea) in North American river otters (Lontra canadensis)
Fig. 4. Large clusters of Dracunculus insignis in paws (A) and joint (B) of North American river otter (Lontra canadensis) from Missouri, USA.
Fig. 3 in Otterly diverse - A high diversity of Dracunculus species (Spirurida: Dracunculoidea) in North American river otters (Lontra canadensis)
Fig. 3. Surgical removal of a Clade 2 Dracunculus sp. (FL15-33934) from a North American river otter (Lontra canadensis) from Florida, USA.
Fig. 1 in Otterly diverse - A high diversity of Dracunculus species (Spirurida: Dracunculoidea) in North American river otters (Lontra canadensis)
Fig. 1. Distribution of Dracunculus spp. in North American river otters (Lontra canadensis) in North America. Species identifications are based on molecular identification or male morphology.
Fig. 2 in Otterly diverse - A high diversity of Dracunculus species (Spirurida: Dracunculoidea) in North American river otters (Lontra canadensis)
Fig. 2. Posterior end of a male worm of a Clade 1 Dracunculus sp. (NC-otter8C) from a North American river otter (Lontra canadensis) from North Carolina showing the paired spicules (A), gubernaculum (B, C), and the bulbous posterior end of the tail (D).
Fig. 5 in Otterly diverse - A high diversity of Dracunculus species (Spirurida: Dracunculoidea) in North American river otters (Lontra canadensis)
Fig. 5. Genetic relationships of Dracunculus spp. from North American river otters (Lontra canadensis) compared with other Dracunculus spp. based on partial cytochrome c oxidase subunit 1 gene sequences. The text in bold in the figure represents specimens analyzed in this study. Sequences with an asterisk (*) were derived from river otters (current and previous studies).
Data from: Impact of population expansion on genetic diversity and structure of river otters (Lontra canadensis) in central North America
Populations of North American river otters (Lontra canadensis) declined throughout large portions of the continent during the early 1900s due to habitat degradation and unregulated trapping. River otters had been extirpated in North Dakota (ND), but the Red River Valley has since been recolonized, with potential source populations including the neighboring states of Minnesota or South Dakota, or the Canadian province of Manitoba (MB). We genotyped 9 microsatellite loci in 121 samples to determine the source population of river otters in the Red River Valley of ND, as well as to assess population structure and diversity of river otters in central North America. Overall, genetic diversity was high, with an average observed heterozygosity of 0.58. Genetic differentiation was low (F ST < 0.05) between river otters in ND and those of Minnesota, suggesting that eastern ND was recolonized by river otters from Minnesota. River otters from MB were genetically distinct from all other sampled populations. Low genetic differentiation (F ST = 0.044) between South Dakota and Louisiana (LA) suggested that reintroductions using LA stock were successful. The genetic distinctiveness of river otters from different geographic regions should be considered when deciding on source populations for future translocations.
Data from: Impact of population expansion on genetic diversity and structure of river otters (Lontra canadensis) in central North America
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