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7 results for “Champsocephalus gunnari”
Figure 1 in Some histological data on bone and teeth in the grey notothen (Lepidonotothen squamifrons) and in the mackerel icefish (Champsocephalus gunnari) (Notothenioidei; Perciformes; Teleostei)
Figure 1. – Lepidonotothen squamifrons (227 mm SL). Cross section of the dental (APS-Groat-PIC). A: Bony tissue is deprived of osteocytes. Arrows point to vascular cavities. B: Detail of an erosive cavity showing active osteoclasts (arrowheads). The arrows point to osteoblastic canaliculi. C: Champsocephalus gunnari (150 mm SL) (AZAN). Bony tissue is deprived of osteocytes and osteoblastic canaliculi are seen (arrowheads). Scale bars: A = 250 μm; B, C = 25 μm.
Figure 5 in The complete mitochondrial genome of the mackerel icefish, Champsocephalus gunnari (Actinopterygii: Channichthyidae), with reference to the evolution of mitochondrial genomes in Antarctic notothenioids
Figure 5. Phylogenetic relationships of control regions inferred by the maximum likelihood (ML) method. Statistical support is shown on the branches: bootstrap values (above) and posterior probability (below). BI, Bayesian inference; CR, control region.
Figure 1 in The complete mitochondrial genome of the mackerel icefish, Champsocephalus gunnari (Actinopterygii: Channichthyidae), with reference to the evolution of mitochondrial genomes in Antarctic notothenioids
Figure 1. Evolution of mitochondrial genomes in Antarctic notothenioids modified from Zhuang & Cheng (2010). Abbreviations: 12S, 12S ribosomal RNA; CR, control region; Cyt b, cytochrome b; E, tRNAGlu; F, tRNAPhe; ND, nicotinamide adenine dinucleotide (reduced form) dehydrogenase; P, tRNAPro; T, tRNAThr.
Figure 4. A in The complete mitochondrial genome of the mackerel icefish, Champsocephalus gunnari (Actinopterygii: Channichthyidae), with reference to the evolution of mitochondrial genomes in Antarctic notothenioids
Figure 4. A, linear representation of three types of gene content from the partial cytochrome b (Cyt b) to 12S rRNA in the mitochondrial (mt) genome of the mackerel icefish. Black and dark grey arrows respectively represent the first and the second duplicates. The first duplicate of the type-1 genome contains full-length nicotinamide adenine dinucleotide (reduced form) dehydrogenase subunit 6 (ND6) and tRNAGlu. Type-2 contains a half-sized ND6 only. Type-3 does not contain ND6 or tRNAGlu. B, PCR amplifications for detecting ND6 and tRNAGlu in the three types of mt genome of the mackerel icefish. PCR fragments between Cyt b and control region (CR) 2 (Cyt b-CR2) and between CR2 and CR3 (CR2-CR3) contain the first and second copies of ND6, respectively. The PCR fragment between ND5 and Cyt b (ND5-Cyt b) did not contain ND6 or tRNAGlu. M, size marker. Lanes 1, 2, 7, and 10 are type-1 individuals. Lanes 3, 4, 8 and 11 are type-2 individuals. Lanes 5, 6, 9, and 12 are type-3 individuals. Abbreviations: E, tRNAGlu; F, tRNAPhe; P, tRNAPro; T, tRNAThr.
Figure 3 in The complete mitochondrial genome of the mackerel icefish, Champsocephalus gunnari (Actinopterygii: Channichthyidae), with reference to the evolution of mitochondrial genomes in Antarctic notothenioids
Figure 3. Map of the mackerel icefish mitochondrial (mt) genome as a circular diagram. The map represents the mt genome of a type-1 individual in which ND6 and tRNAGlu were transposed to a position between tRNAThr and tRNAPro flanked by intergenic spacers (UN3 and UN4), and the ND6- to -CR segment was duplicated once. Fourteen protein-coding genes, two rRNA genes, and noncoding regions are labelled with abbreviations. Twenty-four tRNA genes are shown by a one-letter amino acid code. Different codons used by each of tRNALeu and tRNASer are shown in parentheses. Genes transcribed from the heavy strand and light strand are respectively presented outside and inside the circle. Heavy- and light-strand replication origins are represented by OH and OL, respectively. Abbreviations: 12S, 12S ribosomal RNA; 16S, 16S ribosomal RNA; A, tRNAAla; ATP, ATP synthase; C, tRNACys; CO, cytochrome oxidase; Cyt b, cytochrome b; D, tRNAAsp; E, tRNAGlu; F, tRNAPhe; G, tRNAGly; H, tRNAHis; I, tRNAIle; K, tRNALys; L, tRNALeu; M, tRNAMet; N, tRNAAsn; ND, nicotiamide adenine dinucleotide (reduced form) dehydrogenase; P, tRNAPro; Q, tRNAGln; R, tRNAArg; S, tRNASer; T, tRNAThr; V, tRNAVal; W, tRNATrp; Y, tRNATyr.
Figure 2. – Lepidonotothen squamifrons. A in Some histological data on bone and teeth in the grey notothen (Lepidonotothen squamifrons) and in the mackerel icefish (Champsocephalus gunnari) (Notothenioidei; Perciformes; Teleostei)
Figure 2. – Lepidonotothen squamifrons. A: Cross section of the premaxilla (microradiography). B: Cross section of the dental (microradiography). C: Cross section of a dorsal spiny ray (microradiography). D: Cross section of a caudal vertebra (microradiography) showing the numerous vertebral bony arches fixed on the centrum. E: Detail of a section of a caudal vertebra (Polarized light showing the fibrous organization of bone and two vascular canals (arrowheads). F: Same section than Fig. E observed in transmitted natural light. The vascular canals are surround- ed by a reversal line (arrows). G: Detail of a section (polarized light) in a vertebral centrum showing growth marks. Scale bars: A = 500 μm; B = 250 μm; C, D, E, F = 200 μm; G = 50 μm. A: 415 mm TL; B-D, G: 333 mm TL; E, F: 250 mm TL.
Figure 3. – Lepidonotothen squamifrons. A in Some histological data on bone and teeth in the grey notothen (Lepidonotothen squamifrons) and in the mackerel icefish (Champsocephalus gunnari) (Notothenioidei; Perciformes; Teleostei)
Figure 3. – Lepidonotothen squamifrons. A: Horizontal section (microradiography) showing several cross sections of teeth on the right and the lower jaw on the left. B: Horizontal section (microradiography) taken lower than Fig. A. The wall of the pulp cavity of the central tooth (*) is crossed by vascular canals. We can see three very young non-functional teeth (arrowheads). C: Cross section of the lower jaw (microradiography) showing a young erupted tooth (arrow) and a fall- en tooth (*). D: Detail of a functional tooth showing the unmineralized ligament (arrowhead). E: Cross section of the jaw showing a tooth bud inserted in an alveola (arrow), beside a functional tooth (arrowhead). F, G: Cross section of a tooth (respectively in transmitted natural and polarized light. The more lateral dentinous tissue is striated, indi- cating the presence of odontoblastic canaliculi. (Scale bars: A, D = 250 μm; B, F, G = 150 μm; C = 500 μm; E = 1 mm. (A, B, F, G: 259 mm TL; C: 415 mm TL; D, E: 190 mm TL).
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