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338 results for “Geographic ranges”
Fig. 3 in Geographic Range Updates for the Tiger Beetles (Coleoptera: Carabidae: Cicindelinae) of Northern Ontario, Canada
Fig. 3. Northern Ontario distribution map showing new and previous collection records for Cicindela duodecimguttata.
Fig. 8 in Geographic Range Updates for the Tiger Beetles (Coleoptera: Carabidae: Cicindelinae) of Northern Ontario, Canada
Fig. 8. Northern Ontario distribution map showing previous collection records for Cicindela purpurea.
A genetically based ecological trade-off contributes to setting a geographic range limit
<p>Understanding the ecological factors that shape geographic range limits and the evolutionary constraints that prevent populations from adaptively evolving beyond these limits is an unresolved question. Here, we investigated why the euryhaline fish, <i>Poecila reticulata</i>, is confined to freshwater within its native range, despite being tolerant of brackish water. We hypothesized that competitive interactions with a close relative, <i>Poecilia picta</i>, in brackish water prevents <i>P. reticulata</i> from colonizing brackish water. Using a combination of field transplant, common garden breeding, and laboratory behavior experiments we find support for this hypothesis, as <i>P. reticulata</i> are behaviorally subordinate and have lower survival in brackish water with <i>P. picta</i>. We also found a negative genetic correlation between <i>P. reticulata</i> growth in brackish water versus freshwater in the presence of <i>P. picta</i>, suggesting a genetically based trade-off between salinity tolerance and competitive ability could constrain adaptive evolution at the range limit.</p>
FIGURE 7 in Generic reassignment of Centropristis fuscula Poey, 1861 (Teleostei: Serranidae), with re-description of the species and comments on its geographical range and sexual system
FIGURE 7. Histological section of specimen MZUSP 71061, in which the synchronous development of testicular (1) portions, containing spermatozoa in the spermatic duct, and ovarian (2) portions, containing oocytes at an advanced stage of development, can be observed. Staining: HE. Scale bar=150 μm.
FIGURE 6 in Generic reassignment of Centropristis fuscula Poey, 1861 (Teleostei: Serranidae), with re-description of the species and comments on its geographical range and sexual system
FIGURE 6. Photos of the mature testicular portion (full of spermatozoa) of the ovotestes specimen MZUSP 71061 (left) and the ovarian portion of specimen NPM6366 (right) containing a post-ovulatory follicle (POF). Staining: HE. Scale bar=150 μm.
FIGURE 4. Serranus fusculus. A in Generic reassignment of Centropristis fuscula Poey, 1861 (Teleostei: Serranidae), with re-description of the species and comments on its geographical range and sexual system
FIGURE 4. Serranus fusculus. A) AZUSC 5962, 159 mm SL, female, Bahia, Brazil, 2008; B) fresh specimen, off Rio Grande do Sul, Brazil, pictured in Bernardes et al., 2005; C) fresh specimen, off Natal, Rio Grande do Norte, Brazil, station ARMT53B, pictured in Lins Oliveira et al., 2015; D) Holotype, MCZ 10015, male, 141 mm SL, Havana, Cuba,1864. E) Radiograph, NPM 2458, 125 mm SL, off Rio Grande do Sul, Brazil, depth 186 m. Images by Sampaio, C.L.S. (A); Fischer, L.G. (B, C, E); Museum of Comparative Zoology, Harvard University © President and Fellows of Harvard College (D).
FIGURE 5 in Generic reassignment of Centropristis fuscula Poey, 1861 (Teleostei: Serranidae), with re-description of the species and comments on its geographical range and sexual system
FIGURE 5. Otoliths from right side of Serranus fusculus with 200 mm TL, 188 mm FL, and 105 g TW in superior (A), inner (B), and outer view (C). TW=total weight, TL=total length, FL=fork length.
FIGURE 3 in Generic reassignment of Centropristis fuscula Poey, 1861 (Teleostei: Serranidae), with re-description of the species and comments on its geographical range and sexual system
FIGURE 3. Serranus fusculus, live specimen, approximately 140 mm SL, Curacao, August 2013. Image by D. Ross Robertson & Carole Baldwin
Data from: Historical biogeography using species geographical ranges
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Data from: Mycorrhizal interactions do not influence plant-herbivore interactions in populations of Clarkia xantiana ssp. xantiana spanning from center to margin of the geographic range
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Data from: Long-distance dispersal maximizes evolutionary potential during rapid geographic range expansion
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Data from: Topographic ruggedness and rainfall mediate geographic range contraction of a threatened marsupial predator
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Data from: Interactions between soil habitat and geographic range location affect plant fitness
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A genetically based ecological trade-off contributes to setting a geographic range limit
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Phylogenomics and fossil data inform the systematics and geographic range evolution of a diverse Neotropical ant lineage
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Extant species fail to estimate ancestral geographical ranges at older nodes in primate phylogeny
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Data from: Biological traits, phylogeny and human footprint signatures on the geographic range size of passerines (Order Passeriformes) worldwide
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Data from: Inferring the geographic origin of a range expansion: latitudinal and longitudinal coordinates inferred from genomic data in an ABC framework with the program X-ORIGIN
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Data from: Contrasting influences of geographic range and distribution of populations on patterns of genetic diversity in two sympatric Pilbara Acacias
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Data from: Shared genetic diversity across the global invasive range of the Monk parakeet suggests a common restricted geographic origin and the possibility of convergent selection
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OpenNeuro
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