Redescription of the Tuvirão,<i>Gymnotus inaequilabiatus</i>Valenciennes, 1839, Using High-Resolution X-ray Computed Tomography

Maxime, Emmanuel L.; Albert, James S.

doi:10.1643/ci-13-054

Cited by 14 publications

(6 citation statements)

References 21 publications

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“…cuia presented also 99% of identity with Gymnotus new sp. RS2 that, according to Tagliacollo et al (2016), belongs to G. carapo clade and not to G. tigre clade, which includes the species G. inaequilabiatus and G. paraguensis (Maxime, Albert, 2014;Craig et al, 2018). It is possible that the specimens identified as G. inaequilabiatus in previous studies based on Graça, Pavanelli (2007) and Ota et al (2018) may be actually G. cuia.…”

Section: Discussionmentioning

confidence: 89%

“…Of these species, G. carapo australis, G. cuia, and G. pantanal are ecologically abundant and G. inaequilabiatus, G. pantherinus, G. paraguensis and G. sylvius are not abundant. Gymnotus inaequilabiatus is often misidentified or mistaken for other species, despite the presence of multiple salient external diagnostic characters (Maxime, Albert, 2014) that place it in the G. tigre clade rather than the G. carapo clade. Further, G. inaequilabiatus is unique among congeners in its large adult body size, growing to one-meter total length.…”

Section: Discussionmentioning

confidence: 99%

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Molecular assessment of Gymnotus spp. (Gymnotiformes: Gymnotidae) fishing used as live baitfish in the Tietê River, Brazil

et al. 2019

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The capture of live bait for sport fishing is an important activity for fishing communities. The main species used for this purpose are members of the genus Gymnotus, which comprises numerous species of cryptic nature that are difficult to identify based on external morphology. The aims of this work were to identify through partial sequences of the COI gene Gymnotus species fished in the Jacaré-Guaçu River, SP, and to develop a molecular diagnostic approach using PCR-RFLP to identify these species. Partial COI sequences were compared to those of other species deposited in GenBank. The sequences were assessed in the NEBCutter program to determine restriction sites in the sequence and the enzymes to be tested. Phenetic analysis performed by Neighbor-Joining method showed that the specimens sampled belong to two species preliminary identified here as G. cf. sylvius and G. cf. cuia, with G. cf. sylvius accounting for 95.2% of the individuals sampled. The enzymes NlaIII and SacI generated fragments that allowed distinguishing the Gymnotus species using PCR-RFLP. This analysis can be used to accurately identify these species, which is fundamental for monitoring Gymnotus fishing and assessing the conservation of this genetic resource.

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Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Molecular assessment of Gymnotus spp. (Gymnotiformes: Gymnotidae) fishing used as live baitfish in the Tietê River, Brazil

et al. 2019

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“…Among the allochthonous species, Poecilia reticulata was introduced to control mosquito larvae (Ota et al 2018). Cichla piquiti was probably introduced for sport fishing (Langeani et al 2007; Ota et al 2018), and Gymnotus inaequilabiatus originally from the Lower Paraná River, Paraguay and Uruguay rivers (Maxime and Albert 2014), colonized the upper reaches of the Paraná River after the construction of the Itaipu hydroelectric dam in the 1980s. Ota et al (2018) suggested that the occurrence of Hoplerythrinus unitaeniatus in the Upper Paraná River can be associated with its introduction as a live bait or after inundation of the Sete Quedas Falls after the construction of the Itaipu dam.…”

Section: Discussionmentioning

confidence: 99%

Checklist and key for the identification of fish fauna of the Uberaba River, Upper Paraná River system, Brazil

Ribeiro¹,

Chagas²,

Thereza³

et al. 2019

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The Uberaba River is an important right-bank tributary to the Grande River, in the Upper Paraná River system, Brazil, and the main water source for the public supply of the Uberaba city, Minas Gerais state. An inventory, an identification key, and photographs of the fish species of the Uberaba River are provided, based on samples made between 2012 and 2014 at 14 sampling sites in the river system. A total of 73 species was recorded from six orders, 20 families, and 49 genera. Characiformes and Siluriformes are the most speciose orders and Characidae and Loricariidae are the most commonly recorded families. Most species are autochthonous, nine are considered allochthonous, and two species are exotic. The Uberaba River has a diverse and heterogeneous ichthyofauna, typical of rheophilic environments, with endemic species and few non-native species.

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“…With CT, it was possible to study the complete anatomy of the coelacanth (Latimeria chalumnae) (Schultze and Cloutier 1991); pacu (Colossoma macroponum) (Carr et al 2014) and meagre (Argyrosomus regius) (Gisbert et al 2012). In addition, this technique assisted the description of anatomical characteristics in specimens of zoological collections resulting in the classification of new species of fish, such as Iracema caiana (Carvalho and Albert 2011) and Gymnotus inaequilabiatus (Maxime and Albert 2014). Moreover, X-rays provide us with only 2D images of the skeleton, but organs can be enhanced with using positive and negative contrast media.…”

Section: Introductionmentioning

confidence: 99%

Radiographic and tomographic description of marlin sucker Remora osteochir, Pisces: Echeneidae—preliminary data of one specimen

Conrado

Iunes

Bruno

et al. 2020

Mar Life Sci Technol

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Remoras are commensal fish of various marine species, such as sharks, swordfishes, turtles, dolphins, manta rays and whales. One specimen of marlin sucker Remora osteochir was evaluated using computed tomography for skeletal digital reconstruction, digital radiology for general evaluation and bone counting, and the double contrast technique to distinguish coelomic organs. In radiographic images, it was possible to observe otoliths in the center of the neurocranium, to count 27 vertebrae, nine pairs of ribs, and to detect the presence of the hipural and epural bones near of the caudal fin. In double contrast images, it was possible to visualize the swim bladder, gills, heart, liver, stomach and intestines. From the tomographic images and reconstructions, it was possible to identify the intercalar bones of the cephalic disc; the spine with vertebral bodies composed of neural arches and ventral ribs; and the pectoral girdle formed by posttemporal, cleithrum and scapulocoracoid bones. It was concluded that digital radiology and computed tomography were able to describe anatomical structures of marlin sucker R. osteochir without the need for dissection.

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Redescription of the Tuvirão,Gymnotus inaequilabiatusValenciennes, 1839, Using High-Resolution X-ray Computed Tomography

Cited by 14 publications

References 21 publications

Molecular assessment of Gymnotus spp. (Gymnotiformes: Gymnotidae) fishing used as live baitfish in the Tietê River, Brazil

Molecular assessment of Gymnotus spp. (Gymnotiformes: Gymnotidae) fishing used as live baitfish in the Tietê River, Brazil

Checklist and key for the identification of fish fauna of the Uberaba River, Upper Paraná River system, Brazil

Radiographic and tomographic description of marlin sucker Remora osteochir, Pisces: Echeneidae—preliminary data of one specimen

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