Find research datasets worth reusing

Fig. 5 in Hybridization Between the Endangered Unisexual Gray-Checkered Whiptail Lizard (Aspidoscelis dixoni) and the Bisexual Western Whiptail Lizard (Aspidoscelis tigris) in Southwestern New Mexico

Fig. 5. Karyotypes of two whiptail lizards (Aspidoscelis) from Antelope Pass, Peloncillo Mountains, Hidalgo County, New Mexico. A, Diploid unisexual A. dixoni C (AMNH R-148360, fig. 3), with 2n 5 46 chromosomes. This taxon is a clone with its ultimate ancestor having been an F1 hybrid between A. tigris marmorata (haploid complement of chromosomes in the upper two rows) X A. gularis septemvittata (haploid complement in the lower two rows of A). Note that the X chromosome that was ultimately inherited from marmorata (third largest, upper row) was apparently fissioned at the centromere (arrow) forming two additional set II-sized macrochromosomes (here arranged to suggest the ancestral unfissioned state in marmorata). Note also that the missing microchromosome of A. dixoni C is illustrated as missing from the marmorata genome (o at the right end of the second row), although we do not know from which genome it was actually lost. B, Triploid hybrid female of A. dixoni C X A. t. punctilinealis (AMNH R-148141, fig. 3), with 3n 5 69 chromosomes arranged in six rows. Rows 2 and 4 represent the haploid complement most recently inherited from A. t. punctilinealis, including its intact X chromosome (third largest). Rows 1, 3, 5, and 6 represent the two haploid complements inherited from A. dixoni C, including the fissioned X (arrow) chromosome and missing microchromosome (o), as in A, above. Bar represents 10 Mm.

Fig. 6 in Hybridization Between the Endangered Unisexual Gray-Checkered Whiptail Lizard (Aspidoscelis dixoni) and the Bisexual Western Whiptail Lizard (Aspidoscelis tigris) in Southwestern New Mexico

Fig. 6. Electrophoretic phenotypes representing products of four gene loci of Aspidoscelis. A, IDDH, a tetrameric enzyme, from liver homogenates of seven lizards. Note that the b-allele from PUN is very faint but present in the hybrid. B, PEPA, a dimeric enzyme, from muscle homogenates of seven lizards. Note that New Mexican dixoni differ from Texan dixoni and that the hybrid is triallelic. C, sMDH, a dimeric enzyme, from muscle homogenates of seven lizards. Note that New Mexican dixoni differ from Texan dixoni and the hybrid shows two doses of the a-allele. D, MPI, a monomeric enzyme, from muscle homogenates of eight lizards. Note that New Mexican dixoni differ from Texan dixoni. Letters below gels identify allozymes based on alleles present (table 2). Lanes for individual lizards are labeled beside the gel (with genotype) as follows: DIXA, A. dixoni A; DIXB, A. dixoni B; DIXC, A. dixoni C; DIXC X PUN, hybrid of A. dixoni C X A. t. punctilinealis; MAR, A. t. marmorata; SCA, A. g. scalaris, which at these loci are often the same as A. g. septemvittata; TESC, A. tesselata C-E; TESD, A. tesselata D; TESE-C, A. tesselata E-C; PUN, A. t. punctilinealis. Anode is to the right, and arrow in A indicates position of sample application.

Fig. 1 in Hybridization Between the Endangered Unisexual Gray-Checkered Whiptail Lizard (Aspidoscelis dixoni) and the Bisexual Western Whiptail Lizard (Aspidoscelis tigris) in Southwestern New Mexico

Fig. 1. The global distributional range of Aspidoscelis dixoni. This species occurs in two areas that are separated by approximately 500 km from which no specimens are known. The two areas are Antelope Pass, Peloncillo Mountains, Hidalgo County, New Mexico, and Chinati Mountains, Presidio County, Texas. Initialisms are as follows: AZ, Arizona; MX, Mexico; NM, New Mexico; and TX, Texas. Modified from Topo USA 2.0, DeLorme, Yarmouth, Maine (1999).

Fig. 4 in Hybridization Between the Endangered Unisexual Gray-Checkered Whiptail Lizard (Aspidoscelis dixoni) and the Bisexual Western Whiptail Lizard (Aspidoscelis tigris) in Southwestern New Mexico

Fig. 4. Ventral views (black-and-white) of two of the same lizards shown in figure 3. Upper, hybrid (AMNH R-148141); lower, A. t. punctilinealis (AMNH R-148113). In A. dixoni C (no photograph of ventral view) there is no black on the abdomen or throat, although there may be a few small black dots on the chest.

Fig. 2 in Hybridization Between the Endangered Unisexual Gray-Checkered Whiptail Lizard (Aspidoscelis dixoni) and the Bisexual Western Whiptail Lizard (Aspidoscelis tigris) in Southwestern New Mexico

Fig. 2. Cherry array with drift fence and pitfall traps, where one of the hybrids was found, Antelope Pass, Peloncillo Mountains, Hidalgo County, New Mexico. Photo by C.J.C., June 8, 1990.

Fig. 8 in Hybridization Between the Endangered Unisexual Gray-Checkered Whiptail Lizard (Aspidoscelis dixoni) and the Bisexual Western Whiptail Lizard (Aspidoscelis tigris) in Southwestern New Mexico

Fig. 8. Pattern of morphological distinctiveness expressed by the distribution of canonical variate scores derived from a canonical variate analysis of five meristic characters of 30 specimens of Aspidoscelis from Antelope Pass, Hidalgo County, New Mexico. The specimens include representatives of two species (A. dixoni C and A. t. punctilinealis) and hybrids between them. Note that the three hybrids cluster most closely to their maternal parent.

opencc-by-4.0Mar 2011View details →

Fig. 2 in Chromosomal analyses in Megalonema platanum (Siluriformes: Pimelodidae), an endangered species from South American rivers

Fig. 2. Somatic metaphases of Megalonema platanum submitted to treatment with AgNO 3 (a and b); FISH with 18S rDNA probe (c) and CMA 3 (d). Arrows indicate the NOR bearing chromosomes. The arrowheads indicate the secondary constriction. Detail in (d) shows the chromosome pair CMA positive.

opencc-by-4.0Mar 2011View details →

Fig. 1 in Chromosomal analyses in Megalonema platanum (Siluriformes: Pimelodidae), an endangered species from South American rivers

Fig. 1. Karyotype (a) and somatic metaphases of Megalonema platinum with C-banding (b) rio Tibagi and (c) rio Paraná. In the box the supernumerary chromosome. The arrowheads in (b) and (c) indicate the chromosome pair with interstitial heterochromatin; the arrow in (b) indicate the supernumerary chromosome partially heterochromatic and the asterisks in (c) indicate the chromosomes with heterochromatin blocks in both terminal regions. Scale bar = 10μm

opencc-by-4.0Dec 2009View details →

Fig. 1 in Scientific Note Induced spawning of the endangered Neotropical species Steindachneridion parahybae (Siluriformes: Pimelodidae)

Fig. 1. Steindachneridion parahybae, Paraíba do Sul River basin, Paraibuna, São Paulo State, Brazil. Lateral view (image by Caneppele).

Fig. 2 in Microsatellite variation and population genetic structure of a neotropical endangered Bryconinae species Brycon insignis Steindachner, 1877: implications for its conservation and sustainable management

Fig. 2. UPGMA clustering of the Nei's genetic distance (1972) of the Brycon insignis sampling locations based on six microsatellite loci. Bootstrap values above 50% are shown above branches indicating percentage support in 5000 permutations. Power Company Hatchery (PCH), São João River (SJR), Paraíba do Sul River (PSR), Imbé River (IMR), Muriaé River (MUR) and Itabapoana River (ITR).

Figure 6 in The radiation of red colobus monkeys (Primates, Colobinae): morphological evolution in a clade of endangered African primates

Figure 6. Males. Scatter plots of the first discriminant axes (DFs) of species using shape (first 30 principal components; percentages of variance explained by DF in parentheses).

Figure 4 in The radiation of red colobus monkeys (Primates, Colobinae): morphological evolution in a clade of endangered African primates

Figure 4. Males. Scatter plots of the first principal components of shape variables. See Figure 3 for the key.

Figure 1 in The radiation of red colobus monkeys (Primates, Colobinae): morphological evolution in a clade of endangered African primates

Figure 1. Distribution of red colobus taxa (modified from Colyn, 1991). (I) Piliocolobus badius (Kerr, 1792) (western Tropical Africa): (1) Piliocolobus badius ssp. temminckii (Kuhl, 1820), (2) Piliocolobus badius ssp. badius (Kerr, 1792), and (3) Piliocolobus badius ssp. waldroni (Hayman, 1936); (II) Procolobus pennantii (Waterhouse, 1838) (western equatorial Africa): (4) Procolobus pennantii ssp. epieni Grubb and Powell, 1999, (5) Procolobus pennantii ssp. pennantii (Waterhouse, 1838), (6) Procolobus pennantii ssp. preussi (Matschie, 1900), (7) Procolobus pennantii ssp. bouvieri (Rochebrune, 1887); (III) Central African assemblage: (8) Piliocolobus sp. tholloni, (9) Piliocolobus sp. oustaleti, (10) Piliocolobus sp. parmentieri Colyn & Verheyen, 1987, (11) Piliocolobus sp. lulindicus Matschie, 1914 and Piliocolobus sp. foai (de Pousargues, 1899), (12) Piliocolobus sp. langi (Allen, 1925) and Piliocolobus sp. ellioti (Dollman, 1909), (13) Piliocolobus sp. tephrosceles (Elliot, 1907); (IV) Eastern African species: (14) Piliocolobus gordonorum Matschie, 1900, (15) Piliocolobus rufomitratus, (16) Piliocolobus kirkii Gray, 1868. Grey areas are putative Pleistocenic mountain refugia, taken from Mayr & O'Hara (1986).

Figure 3 in The radiation of red colobus monkeys (Primates, Colobinae): morphological evolution in a clade of endangered African primates

Figure 3. Females. Scatter plots of the first principal components (PCs) of shape variables (percentages of variance explained in parentheses). Shape changes at positive extremes of the axes are illustrated using surface rendering with a two-fold magnification (the same magnification is used in all figures). The average shape (origin of the PCA axes) is shown by the upper right corner of the scatter plots in this and other figures. (a) PC1 vs. PC2. (b) PC3 vs. PC4.

Figure 5 in The radiation of red colobus monkeys (Primates, Colobinae): morphological evolution in a clade of endangered African primates

Figure 5. Females. Scatter plots of the first discriminat axes (DAs) of species using shape (first 35 principal components; percentages of variance explained by DA in parentheses). Shape changes predicted by regressing shape coordinates onto DA are illustrated using surface rendering for positive extremes of the axes.

Fig. 2. a in Updated distribution of the endangered freshwater stingray Urogymnus polylepis in Malaysia, with notes on biology and genetics

Fig. 2. a, Size range (left—weight in kg, right—disc width in cm) by sex for Urogymnus polylepis sighted in Malaysia in comparison with maximum sizes reported from specimens in Thailand (Weight of 600 kg in Monkolprasit & Roberts, 1990; Disc width of 250 cm in Phomikong et al., 2019). b, Number of sightings over period of time and size range of animals sighted in Malaysia.

Fig. 5 in Updated distribution of the endangered freshwater stingray Urogymnus polylepis in Malaysia, with notes on biology and genetics

Fig. 5. COI gene phylogenetic relationships and genetic distance of Urogymnus polylepis and its sister species. The bootstrap values (ML/ Bayesian Inference) are shown at the branches.

Fig. 1 in Updated distribution of the endangered freshwater stingray Urogymnus polylepis in Malaysia, with notes on biology and genetics

Fig. 1. Updated distribution map of Urogymnus polylepis in Malaysia based on citizen reports and direct sightings between 2011–2021). Blue = published sightings, red = unpublished sightings (see Appendices 3 and 4 for detailed information on individual sightings and river location).

Fig. 4. a in Updated distribution of the endangered freshwater stingray Urogymnus polylepis in Malaysia, with notes on biology and genetics

Fig. 4. a, Butchered female Urogymnus polylepis (disc width ca 190 cm) caught in the waters near Mukah, Sarawak in 2016 together with 4 fully developed pups. b, Underside of one of the pups. c, Butchered male U. polylepis (disc width ca 120 cm) caught in the waters near Sandakan, Sabah in 2018.