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1,037 results for “Canadensys”
FIGURE 18 in Ontogenetic and morphological studies on Tetranychus canadensis (Acari: Tetranychidae)
FIGURE 18. Tetranychus canadensis, male, A, leg I; B, leg II; C, leg III; D, leg IV, E, F, distal tarsus I.
FIGURE 15 in Ontogenetic and morphological studies on Tetranychus canadensis (Acari: Tetranychidae)
FIGURE 15. Tetranychus canadensis, male, A, palp femur, trochanter I and peritreme, dorsal view, arrow a,; B, supracoxal seta on palp femur; C, supracoxal dorsal coxa I. Scale bars, A 10 μm, B and C 2 μm.
FIGURE 7 in Ontogenetic and morphological studies on Tetranychus canadensis (Acari: Tetranychidae)
FIGURE 7. Tetranychus canadensis, female, A, stylophore, front view, arrows a, b, peritrematal septum; B, palp and rostrum, front view, arrow c, hole in palptibial claw; arrow d, spur on palptibial claw, arrow e, rostral fossette. Scale bars, A 20 μm, B 10 μm.
FIGURE 14 in Ontogenetic and morphological studies on Tetranychus canadensis (Acari: Tetranychidae)
FIGURE 14. Tetranychus canadensis, male, A, posterior opisthosoma, lateral view; B, palp, lateral view; Scale bars, A 20 μm, B 10 μm.
Data from: A test of somatic mosaicism in the androgen receptor gene of Canada lynx (Lynx canadensis)
Background: The androgen receptor, an X-linked gene, has been widely studied in human populations because it contains highly polymorphic trinucleotide repeat motifs that have been associated with a number of adverse human health and behavioral effects. A previous study on the androgen receptor gene in carnivores reported somatic mosaicism in the tissues of a number of species including Eurasian lynx (Lynx lynx). We investigated this claim in a closely related species, Canada lynx (Lynx canadensis). The presence of somatic mosaicism in lynx tissues could have implications for the future study of exonic trinucleotide repeats in landscape genomic studies, in which the accurate reporting of genotypes would be highly problematic. Methods: To determine whether mosaicism occurs in Canada lynx, two lynx individuals were sampled for a variety of tissue types (lynx 1) and tissue locations (lynx 1 and 2), and 1,672 individuals of known sex were genotyped to further rule out mosaicism. Results: We found no evidence of mosaicism in tissues from the two necropsied individuals, or any of our genotyped samples. Conclusions: Our results indicate that mosaicism does not manifest in Canada lynx. Therefore, the use of hide samples for further work involving trinucleotide repeat polymorphisms in Canada lynx is warranted.
Polyploidization contributes to evolution of competitive ability: a long term common garden study on the invasive Solidago canadensis in China
<p>Plant invasion initiates with the establishment of an alien species population that begins interacting with the existing community in the invaded habitat. Competitive ability may confer advantage to invasive species during establishment. Autopolyploidy has been shown to significantly contribute to successful invasion of China by Solidago canadensis that is native to North America. But how polyploidization improves competitive ability and determines the dominance of invasive species when competing with a plant community in the introduced range remains unclear. Here, we manipulated the initial plant composition of plowed land and subsequently allowed natural colonization by S. canadensis in a five-year common garden experiment. Diploid, tetraploid and hexaploid populations collected in North America (native range) and East Asia (introduced range) were separately planted and allowed to compete with associated weeds in individual plots. The diversity and compositional variation of the plant communities and the growth characteristics of S. canadensis were investigated in summer and autumn each year. Based on how the community assembled, three outcomes were found: 1) S. canadensis outcompeted local vegetation: tetraploids and hexaploids from the introduced range outcompeted associated weeds and were dominant at equilibrium; 2) S. canadensis coexisted with local vegetation: hexaploids from the native range were competitive but ultimately could not outcompete the local vegetation; and 3) S. canadensis became extinct: diploids from both the native and introduced ranges and tetraploids from the native range went extinct. Concomitantly, diversity was low in the first group and high in the second and third. Therefore, polyploidization contributes to the pre differentiation of competitive ability among native S. canadensis populations, facilitatating the invasion of China by this species. The competitive ability of polyploids was enhanced through possible rapid post introduction evolution after their introduction into China, which could be the crucial factor for successful invasion by S. canadensis.</p>
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.
FIGURE 7 in New records and within-species variability of Iberian tardigrades (Tardigrada), with comments on the species from the Echiniscus blumi-canadensis series
FIGURE 7. Double-claw photos from one Macrobiotus hystricogenitus specimen: (A) double-claws from the first pair of leg, typical Macrobiotus hystricogenitus claw morphology, and (B) double-claws from the second pair of legs with an additional spur (arrows). Scale bar = 10 μm.
FIGURE 5B in New records and within-species variability of Iberian tardigrades (Tardigrada), with comments on the species from the Echiniscus blumi-canadensis series
FIGURE 5B. Morphological variability found in Echiniscus merokensis. Percentages are provided for each morphotype. Arrows indicate missing appendages. (B) Echiniscus merokensis suecica.
FIGURE 6 in New records and within-species variability of Iberian tardigrades (Tardigrada), with comments on the species from the Echiniscus blumi-canadensis series
FIGURE 6. Morphological variability found in Echiniscus trisetosus. Percentages are provided for each morphotype. Arrows indicate missing appendages. *Morphotype found also in juvenile specimens.
FIGURE 5A in New records and within-species variability of Iberian tardigrades (Tardigrada), with comments on the species from the Echiniscus blumi-canadensis series
FIGURE 5A. Morphological variability found in Echiniscus merokensis. Percentages are provided for each morphotype. Arrows indicate missing appendages. (A) Echiniscus merokensis merokensis.
FIGURE 2 in New records and within-species variability of Iberian tardigrades (Tardigrada), with comments on the species from the Echiniscus blumi-canadensis series
FIGURE 2. Morphological variability found in Echiniscus blumi. Percentages are provided for each morphotype. Arrows indicate missing appendages.
FIGURE 3 in New records and within-species variability of Iberian tardigrades (Tardigrada), with comments on the species from the Echiniscus blumi-canadensis series
FIGURE 3. Morphological variability found in Echiniscus canadensis. Percentages are provided for each morphotype. Arrows indicate missing appendages. *Morphotype found also in juveniles. **Morphotype found only in juvenile specimens.
FIGURE 4 in New records and within-species variability of Iberian tardigrades (Tardigrada), with comments on the species from the Echiniscus blumi-canadensis series
FIGURE 4. Morphological variability found in Echiniscus mediantus. Percentages are provided for each morphotype. Arrows indicate missing appendages.
FIGURE 1 in New records and within-species variability of Iberian tardigrades (Tardigrada), with comments on the species from the Echiniscus blumi-canadensis series
FIGURE 1. (A) Map of the Iberian Peninsula indicating with a box the study area in Madrid Province. (B) Larger-scale map of the study area indicating sampling sites and altitude lines. The bold line constitutes the northern administrative border of the Comunidad de Madrid. Thin lines are equidistant altitude curves and grey areas are ecological reservoirs.
FIGURES 14–18. Oribatella canadensis, interference contrast micrographs from slide preparations. 14 in The first sexually dimorphic species of Oribatella (Acari, Oribatida, Oribatellidae) and a review of sexual dimorphism in the Brachypylina
FIGURES 14–18. Oribatella canadensis, interference contrast micrographs from slide preparations. 14, adult female, rostrum, anterior at top; 15, custodium and seta 3c; 16, adult male, detail of porose region, with porose area A3 indicated by arrow; 17, adult female, interlamellar region; 18, food bolus, with arrow to hyphal fragment.
FIGURES 7–13. Oribatella canadensis, scanning electron micrographs. 7 in The first sexually dimorphic species of Oribatella (Acari, Oribatida, Oribatellidae) and a review of sexual dimorphism in the Brachypylina
FIGURES 7–13. Oribatella canadensis, scanning electron micrographs. 7, adult female, frontal aspect; 8, adult female, ventral aspect anterior to pedotectum II; 9, adult female, lateral aspect, anterior of seta la, teeth on anterior of tibia I indicated by arrow; 10, adult female, posterior aspect of notogaster; 11, adult male, posterior of notogaster, dorsal aspect, medial tubercle indicated by arrow; 12, adult male, detail of tubercle and environs, fused porose areas indicated by arrows; 13, adult male, posterior of notogaster, in dorsolateral aspect. Scale bars: 7, 100 µm; 8, 9, 12, 13, 50 µm; 10, 20 µm; 12, 10 µm.
Fig. 2 in Gennadota canadensis (Casey) (Staphylinidae: Aleocharinae): New Records, a Range Extension, and Bionomic Notes
Fig. 2. Collection localities for Gennadota canadensis Casey in Nova Scotia, Canada. Inset map shows collection sites in Québec and Pennsylvania.
Pedicularis canadensis (Scrophulariaceae) - inflorescence - whole - unspecified
Image of Pedicularis canadensis (Scrophulariaceae) - inflorescence - whole - unspecified
Pedicularis canadensis (Scrophulariaceae) - inflorescence - lateral view of flower
Image of Pedicularis canadensis (Scrophulariaceae) - inflorescence - lateral view of flower
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
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