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Journal articles on the topic 'Troglobitic fish'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Sampaio, Francisco Alexandre Costa, Marina Silva Rufino, Paulo Santos Pompeu, Hersília de Andrade е. Santos, and Rodrigo Lopes Ferreira. "Hydraulic flow resistance of epigean and hypogean fish of the family Trichomycteridae (Ostariophysi, Siluriformes)." Subterranean Biology 35 (October 23, 2020): 97–110. http://dx.doi.org/10.3897/subtbiol.35.55064.

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Critical swimming speeds of four trichomycterid fish species from epigean and hypogean environments were analyzed and compared: Trichomycterus itacarambiensis and Ituglanis passensis, both troglobitic from underground rivers; Trichomycterus brasiliensis, from epigean rivers; and Ituglanis sp., an undescribed troglophilic species from an underground stream. Swimming tests were conducted with a non-volitional apparatus in which fish swim against a progressive incremental water velocity until they longer resist the flow. Total length was significantly related to critical speed for only T. itacara

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Sampaio, Francisco Alexandre Costa, Marina Silva Rufino, Paulo Santos Pompeu, Hersília de Andrade е. Santos, and Rodrigo Lopes Ferreira. "Hydraulic flow resistance of epigean and hypogean fish of the family Trichomycteridae (Ostariophysi, Siluriformes)." Subterranean Biology 35 (October 23, 2020): 97–110. https://doi.org/10.3897/subtbiol.35.55064.

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Critical swimming speeds of four trichomycterid fish species from epigean and hypogean environments were analyzed and compared: Trichomycterus itacarambiensis and Ituglanis passensis, both troglobitic from underground rivers; Trichomycterus brasiliensis, from epigean rivers; and Ituglanis sp., an undescribed troglophilic species from an underground stream. Swimming tests were conducted with a non-volitional apparatus in which fish swim against a progressive incremental water velocity until they longer resist the flow. Total length was significantly related to critical speed for only T. itacara

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3

Felice, Vanessa, Maria Aparecida Visconti, and Eleonora Trajano. "Mechanisms of pigmentation loss in subterranean fishes." Neotropical Ichthyology 6, no. 4 (2008): 657–62. http://dx.doi.org/10.1590/s1679-62252008000400015.

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Troglobitic (exclusively subterranean) organisms usually present, among their apomorphies related to the subterranean life (troglomorphisms), the regression of eyes and melanic pigmentation. The degree of regression varies among species, from a slight reduction to the complete loss of eyes and dark pigmentation, without a taxonomic correlation. While mechanisms of eye reduction have been intensively investigated in some troglobites such as the Mexican blind tetra characins, genus Astyanax, and the European salamander, Proteus anguinus, few studies have focused on pigmentation. The Brazilian su

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Bichuette, Maria Elina. "ECOLOGIA DE PEIXES DE RIACHOS DE CAVERNAS E OUTROS HABITAT SUBTERRÂNEOS." Oecologia Australis 25, no. 02 (2021): 620–41. http://dx.doi.org/10.4257/oeco.2021.2502.24.

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Brazil is rich in caves, with more than 20,000 officially registered. In addition to the caves, which develop in different types of rock, there are other subterranean habitats (hypogean) with bodies of water in the form of drainages (level base streams), outcrops of the water table (saturated zone) in flooded caves or in the form of pools and lakes within caves, in addition to upper aquifers formed by infiltration of water in the rock. In some cases, groundwater does not emerge in caves, but in alluviums close to rivers, representing a hyporeic zone. The Brazilian subterranean ichthyofauna is

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Espinasa, Luis, Drake M. Smith, and Julianna M. Lindquist. "The Pennsylvania grotto sculpin: population genetics." Subterranean Biology 38 (April 12, 2021): 47–63. http://dx.doi.org/10.3897/subtbiol.38.60865.

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The Pennsylvania grotto sculpin is known from just two caves of the Nippenose Valley in central Pennsylvania, USA. They exhibit emergent troglobitic morphological traits and are the second northern-most cave adapted fish in the world. Two mitochondrial (16S rRNA and D-loop gene) and one nuclear (S7 ribosomal protein gene intron) gene in both cave and epigean populations were sequenced. For the three markers, a large proportion of cave specimens possess unique haplotypes not found in their local surface counterparts, suggesting a vicariance in their evolutionary history. The cave population als

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Espinasa, Luis, Drake M. Smith, and Julianna M. Lindquist. "The Pennsylvania grotto sculpin: population genetics." Subterranean Biology 38 (April 12, 2021): 47–63. https://doi.org/10.3897/subtbiol.38.60865.

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The Pennsylvania grotto sculpin is known from just two caves of the Nippenose Valley in central Pennsylvania, USA. They exhibit emergent troglobitic morphological traits and are the second northern-most cave adapted fish in the world. Two mitochondrial (16S rRNA and D-loop gene) and one nuclear (S7 ribosomal protein gene intron) gene in both cave and epigean populations were sequenced. For the three markers, a large proportion of cave specimens possess unique haplotypes not found in their local surface counterparts, suggesting a vicariance in their evolutionary history. The cave population als

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7

Dazzani, Bianca, Caroline Garcia, Marilena Peixoto, Eleonora Trajano, and Lurdes Foresti de Almeida-Toledo. "Cytogenetic and molecular analyses in troglobitic and epigean species of Pimelodella (Siluriformes: Heptapteridae) from Brazil." Neotropical Ichthyology 10, no. 3 (2012): 623–32. http://dx.doi.org/10.1590/s1679-62252012005000020.

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Samples from seven different locations of the genus Pimelodella were genetically examined, two caves (exclusively subterranean, upper Tocantins River and São Francisco River) and five epigean (from upper Paraná River basin). Cytogenetic analyses revealed the same diploid number (2n=46) for all species besides similarities in both number and location of nucleolar organizer regions and C bands. FISH with 5S rDNA probes and CMA3 staining indicated significant differences among the studied species. Application of PCR-RFLP in ATPase 6 and 8 mitochondrial genes allowed building a minimum evolution p

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8

Espinasa, Luis, Bartolo Nicole D., and Newkirk Catherine E. "DNA sequences of troglobitic nicoletiid insects support Sierra de El Abra and the Sierra de Guatemala as a single biogeographical area: Implications for Astyanax." Subterranean Biology 13 (March 18, 2014): 35–44. https://doi.org/10.3897/subtbiol.13.7256.

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The blind Mexican tetra fish, <i>Astyanax mexicanus</i>, has become the most influential model for research of cave adapted organisms. Many authors assume that the Sierra de Guatemala populations and the Sierra de El Abra populations are derived from two independent colonizations. This assumption arises in part from biogeography. The 100 m high, 100 m wide Servilleta Canyon of the Boquillas River separates both mountain ranges and is an apparent barrier for troglobite dispersion. <i>Anelpistina quinterensis</i> (Nicoletiidae, Zygentoma, Insecta) is one of the most troglomorphic nicoletiid silv

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Mar-Silva, Adán Fernando, Jairo Arroyave, and Píndaro Díaz-Jaimes. "The complete mitochondrial genome of the Mexican-endemic cavefish Ophisternon infernale (Synbranchiformes, Synbranchidae): insights on patterns of selection and implications for synbranchiform phylogenetics." ZooKeys 1089 (March 11, 2022): 1–23. http://dx.doi.org/10.3897/zookeys.1089.78182.

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Ophisternon infernale is one of the 200+ troglobitic fish species worldwide, and one of the two cave-dwelling fishes endemic to the karstic aquifer of the Yucatán Peninsula, Mexico. Because of its elusive nature and the relative inaccessibility of its habitat, there is virtually no genetic information on this enigmatic fish. Herein we report the complete mitochondrial genome of O. infernale, which overall exhibits a configuration comparable to that of other synbranchiforms as well as of more distantly related teleosts. The KA/KS ratio indicates that most mtDNA PCGs in synbranchiforms have evol

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Bichuette, Maria Elina, and Eleonora Trajano. "Population density and habitat of an endangered cave fish Eigenmannia vicentespelaea Triques, 1996 (Ostariophysi: Gymnotiformes) from a karst area in central Brazil." Neotropical Ichthyology 13, no. 1 (2015): 113–22. http://dx.doi.org/10.1590/1982-0224-20140095.

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The troglobitic electric fish Eigenmannia vicentespelaea, endemic to a single cave-system and included in the Brazilian Red List of Threatened Fauna, was studied in relation to population densities and habitat. For comparison, we used the epigean species, E. trilineata. We verify if the population densities recorded for E. vicentespelaea follow the pattern observed for other subterranean fishes; if there are seasonal fluctuations in these densities and which environmental variables explain the densities variation. We estimated abundances and population densities during three consecutive dry se

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Mar-Silva, Adán Fernando, Jairo Arroyave, and Píndaro Díaz-Jaimes. "The complete mitochondrial genome of the Mexican-endemic cavefish Ophisternon infernale (Synbranchiformes, Synbranchidae): insights on patterns of selection and implications for synbranchiform phylogenetics." ZooKeys 1089 (March 11, 2022): 1–23. https://doi.org/10.3897/zookeys.1089.78182.

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Ophisternon infernale is one of the 200+ troglobitic fish species worldwide, and one of the two cave-dwelling fishes endemic to the karstic aquifer of the Yucatán Peninsula, Mexico. Because of its elusive nature and the relative inaccessibility of its habitat, there is virtually no genetic information on this enigmatic fish. Herein we report the complete mitochondrial genome of O. infernale, which overall exhibits a configuration comparable to that of other synbranchiforms as well as of more distantly related teleosts. The K<sub>A</sub>/K<sub>S</sub> ratio indicates that most mtDNA PCGs in syn

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12

Červená, Martina, František Šťáhlavský, Vladimír Papáč, Ľubomír Kováč, and Jana Christophoryová. "Morphological and cytogenetic characteristics of Neobisium (Blothrus) slovacum Gulička, 1977 (Pseudoscorpiones, Neobisiidae), the northernmost troglobitic species of the subgenus Blothrus in Europe." ZooKeys 817 (January 15, 2019): 113–30. http://dx.doi.org/10.3897/zookeys.817.27189.

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A redescription is provided of the adult, tritonymph and deutonymph life stages of the troglobitic Neobisium (Blothrus) slovacum Gulička, 1977, which is known from Slovakia and Hungary. Material examined included 35 previously deposited museum specimens and 15 newly collected specimens. In addition, the karyotype and distribution of 18S rDNA clusters are described, using fluorescence in situ hybridization (FISH). The male karyotype ofN.slovacumcomprises 69 chromosomes, with a predominance of biarmed chromosomes, and an X0 sex chromosome system. Two pairs of signals for 18S rDNA on biarmed chro

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13

Zepon, Tamires, Jonas Gallão, and Maria Elina Bichuette. "How much we know about Brazilian subterranean aquatic fauna." ARPHA Conference Abstracts 5 (July 14, 2022): e89658. https://doi.org/10.3897/aca.5.e89658.

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The first study concerning Brazilian subterranean fauna was the description of the phreatobitic fish<em> Phreatobius cistenarum</em> Goeldi,<em> </em>1905, followed by the stygobitic fish <em>Pimelodella kronei</em> (Miranda Ribeiro, 1907). After that, biospeleological studies mainly focused on terrestrial taxa description, and in 1972 the first stygobitic invertebrate, <em>Aegla cavernicola </em>Türkay, 1972 (Decapoda, Aeglidae)<em>, </em>was described. Here, we provided an overview of the Brazilian subterranean aquatic fauna knowledge. To date, ca. 270 troglobitic species are described, of w

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14

Červená, Martina, František Šťáhlavský, Vladimír Papáč, Ľubomír Kováč, and Jana Christophoryová. "Morphological and cytogenetic characteristics of Neobisium (Blothrus) slovacum Gulička, 1977 (Pseudoscorpiones, Neobisiidae), the northernmost troglobitic species of the subgenus Blothrus in Europe." ZooKeys 817 (January 15, 2019): 113–30. https://doi.org/10.3897/zookeys.817.27189.

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A redescription is provided of the adult, tritonymph and deutonymph life stages of the troglobitic Neobisium (Blothrus) slovacum Gulička, 1977, which is known from Slovakia and Hungary. Material examined included 35 previously deposited museum specimens and 15 newly collected specimens. In addition, the karyotype and distribution of 18S rDNA clusters are described, using fluorescence in situ hybridization (FISH). The male karyotype of N. slovacum comprises 69 chromosomes, with a predominance of biarmed chromosomes, and an X0 sex chromosome system. Two pairs of signals for 18S rDNA on biarmed c

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15

Abrantes, Yuri Gomes, Ana Beatriz Alves Bennemann, Silvia Yasmin Lustosa-Costa, Diego de Medeiros Bento, Telton Pedro Anselmo Ramos, and Sergio Maia Queiroz Lima. "Diversity and conservation of fishes from karstic areas of the Jandaíra Formation in the Brazilian semiarid." Papéis Avulsos de Zoologia 63 (March 6, 2023): e202363011. http://dx.doi.org/10.11606/1807-0205/2023.63.011.

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Few studies have focused on non-troglomorphic fishes occurring in Brazilian caves, especially those in the Caatinga region. The present study is the first survey of fishes from karstic areas of the Jandaíra Formation in Rio Grande do Norte State, northeastern Brazil. This region is characterized by a high concentration of caves and a rich subterranean biodiversity, especially of troglobitic invertebrates, but remains considered a gap on the knowledge of the subterranean ichthyofauna in Brazil. Four field expeditions were carried out covering two dry and two rainy seasons, in 2018 and 2019, in

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16

Secutti, Sandro, and Eleonora Trajano. "Reproduction, development, asymmetry and late eye regression in the Brazilian cave catfish Ituglanis passensis (Siluriformes, Trichomycteridae): evidence contributing to the neutral mutation theory." Subterranean Biology 38 (April 19, 2021): 91–112. https://doi.org/10.3897/subtbiol.31.60691.

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The troglobitic (exclusively subterranean source population) catfish Ituglanis passensis (Siluriformes, Trichomycteridae) is endemic to the Passa Três Cave, São Domingos karst area, Rio Tocantins basin, Central Brazil. This unique population presents variably reduced eyes and melanic pigmentation. We describe reproduction and early development in this species based on a spontaneous (non-induced) reproductive-event that occurred in the laboratory in January–February, 2009, while simultaneously comparing with data from the cave-habitat and a previous reproductive event. Egg laying was parceled.

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Bichuette, Maria Elina, and Eleonora Trajano. "Biology and behavior of Eigenmannia vicentespelaea, a troglobitic electric fish from Brazil (Teleostei: Gymnotiformes: Sternopygidae): a comparison to the epigean species, E. trilineata, and the consequences of cave life." Tropical Zoology 30, no. 2 (2017): 68–82. http://dx.doi.org/10.1080/03946975.2017.1301141.

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Bichuette, Maria Elina, and Eleonora Trajano. "A new cave species of Rhamdia (Siluriformes: Heptapteridae) from Serra do Ramalho, northeastern Brazil, with notes on ecology and behavior." Neotropical Ichthyology 3, no. 4 (2005): 587–95. http://dx.doi.org/10.1590/s1679-62252005000400016.

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Rhamdia enfurnada, a new troglobitic (exclusively subterranean) catfish, is described from the Gruna do Enfurnado, Serra do Ramalho, southwestern Bahia State, middle São Francisco River basin. It differs from epigean congeners from the São Francisco River basin by the variable eye size, ranging from reduced to externally invisible (bilateral asymmetry in development of eyes is frequently observed), with a conspicuous orbital concavity (orbital diameter varying from 6.4 to 13.6% of head length in R. enfurnada and from 14.5 to 24.4% in the epigean species); by the dark pigmentation reduced due t

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Espinasa, Luis, Emily Collins, García C. Patricia Ornelas, Sylvie Rétaux, Nicolas Rohner, and Jennifer Rutkowski. "Divergent evolutionary pathways for aggression and territoriality in Astyanax cavefish." Subterranean Biology 43 (July 15, 2022): 169–83. https://doi.org/10.3897/subtbiol.73.79318.

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The surface morph of the Mexican tetra fish (Astyanax mexicanus) exhibits strong territoriality behavior and high levels of aggression. In contrast, the eyeless cave-adapted morph from Sierra de El Abra, México, rarely are aggressive and have totally lost the territorial behavior. These behaviors are part of what has been called the cavefish behavioral syndrome. Here, we report that several Astyanax cave populations of Sierra de Guatemala, unlike those reported for the Sierra de El Abra cave populations, display significant territoriality and aggression when confined into a reduced space. We d

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Espinasa, Luis, Marie Pavie, and Sylvie Rétaux. "Protocol for lens removal in embryonic fish and its application on the developmental effects of eye regression." Subterranean Biology 45 (February 2, 2023): 39–52. https://doi.org/10.3897/subtbiol.45.96963.

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The lens plays a central role in the development of the optic cup. In fish, regression of the eye early in development affects the development of the craniofacial skeleton, the size of the olfactory pits, the optic nerve, and the tectum. Lens removal further affects olfaction, prey capture, and aggression. The similarity of the fish eye to other vertebrates is the basis for its use as an excellent animal model of human defects. Questions regarding the effects of eye regression are specifically well-suited to be addressed by using fish from the genus Astyanax. The species has two morphs; an eye

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Riesch, Rüdiger, Martin Plath, and Ingo Schlupp. "Speciation in caves: experimental evidence that permanent darkness promotes reproductive isolation." Biology Letters 7, no. 6 (2011): 909–12. http://dx.doi.org/10.1098/rsbl.2011.0237.

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Divergent selection through biotic factors like predation or parasitism can promote reproductive isolation even in the absence of geographical barriers. On the other hand, evidence for a role of adaptation to abiotic factors during ecological speciation in animals is scant. In particular, the role played by perpetual darkness in establishing reproductive isolation in cave animals (troglobites) remains elusive. We focused on two reproductively isolated ecotypes (surface- and cave-dwelling) of the widespread livebearer Poecilia mexicana , and raised offspring of wild-caught females to sexual mat

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Lei, Fakai, Mengzhen Xu, Ziqing Ji, Kenneth Alan Rose, Vadim Zakirov, and Mike Bisset. "Swimming behavior and hydrodynamics of the Chinese cavefish Sinocyclocheilus rhinocerous and a possible role of its head horn structure." PLOS ONE 17, no. 7 (2022): e0270967. http://dx.doi.org/10.1371/journal.pone.0270967.

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The blind troglobite cavefish Sinocyclocheilus rhinocerous lives in oligotrophic, phreatic subterranean waters and possesses a unique cranial morphology including a pronounced supra-occipital horn. We used a combined approach of laboratory observations and Computational Fluid Dynamics modeling to characterize the swimming behavior and other hydrodynamic aspects, i.e., drag coefficients and lateral line sensing distance of S. rhinocerous. Motion capture and tracking based on an Artificial Neural Network, complemented by a Particle Image Velocimetry system to map out water velocity fields, were

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Castellanos-Morales, Cesar A., Jaime Bautista-Ortega, Alberto Santillán-Fernández, Zulema G. Huicab-Pech, Carlos A. Poot-Delgado, and Wadi Elim Sosa-González. "Vertebrate cave fauna troglobite and troglophile of the karst system of La Paz, in the Andean Region of Colombia, with notes on local extinction record." Boletín Científico Centro de Museos Museo de Historia Natural 27, no. 2 (2023): 163–79. http://dx.doi.org/10.17151/bccm.2023.27.2.10.

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La Paz is a municipality located in the Eastern Andes of Colombia and has a great variety of hipogean and epigean karstic environments. Different speleological explorations carried out in the last decades in La Paz region have reported the existence of at least 23 subterranean environments including caves, caverns, grottos, holes, and sinkholes, of which the most remarkable due to its vertical depth is the Hoyo del Aire, a Sima-type geological formation with a vertical drop greater than 140 m and a diameter of 130 m. The presence of troglobite and troglophile vertebrate fauna was rereported, i

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Espinasa, Luis, and Aidan Pech. "Biogeographical affinities of the aquatic community of Refugio Cave, a newly discovered Astyanax cave." Subterranean Biology 46 (September 21, 2023): 77–86. https://doi.org/10.3897/subtbiol.46.102043.

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Pachón cave in the Sierra de El Abra, in Northeast Mexico, stands out as hosting the world's most widely studied cavefish population – with over 500 scholarly articles published about the population. Refugio Cave was recently discovered in the El Abra region. This cave hosts the mysid cave shrimp Spelaeomysis quinterensis and the blind cave tetra fish, Astyanax mexicanus. This study aims to understand how the aquatic community of Refugio Cave es related to other cave populations in the area. For this purpose, the Histone H3 gene of mysid shrimps and the OCA2 gene that confers albinism in Astya

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Espinasa, Luis, Ruth Diamant, Marylena Mesquita, Julianna M. Lindquist, Adrianna M. Powers, and James Helmreich. "Laterality in cavefish: Left or right foraging behavior in Astyanax mexicanus." Subterranean Biology 44 (September 13, 2022): 123–38. https://doi.org/10.3897/subtbiol.44.86565.

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The evolution of foraging behaviors is key to colonizing challenging habitats such as a cave's dark environment. Vibration attraction behavior (VAB) gives fish the ability to swim in the darkness toward a vibration stimulus produced by many prey crustaceans and insects. VAB evolved in the blind Mexican cave tetra, Astyanax mexicanus. VAB is regulated by an increased number of mechanosensory neuromasts, particularly in the eye orbital region. However, VAB in Astyanax is only correlated with the number of neuromasts on the left side. Astyanax also have a bent skull preferentially to the left and

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Trajano, Eleonora, Sandro Secutti, and George Mendes Taliaferro Mattox. "Epigean and subterranean ichthyofauna in Cordisburgo karst area, eastern Brazil." Biota Neotropica 9, no. 3 (2009): 277–81. http://dx.doi.org/10.1590/s1676-06032009000300026.

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After an ichthyofaunistic survey conducted in May 2007 on surface (epigean) water bodies of Cordisburgo karst area, State of Minas Gerais, 13 species were recorded, mostly characiforms; in addition three non-troglomorphic (normally eyed and pigmented) and one troglomorphic catfish (siluriforms) species were recorded in two caves surveyed at different occasions, totaling 17 fish species for the area. All the nominal species herein reported for Cordisburgo area have been previously reported for the Rio das Velhas basin. None of the species observed in caves were found in epigean habitats and vic

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Pérez-Rodríguez, Rodolfo, Sarai Esquivel-Bobadilla, Adonaji Madeleine Orozco-Ruíz, José Luis Olivas-Hernández, and Francisco Javier García-De León. "Genetic structure and historical and contemporary gene flow ofAstyanaxmexicanusin the Gulf of Mexico slope: a microsatellite-based analysis." PeerJ 9 (February 25, 2021): e10784. http://dx.doi.org/10.7717/peerj.10784.

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BackgroundAstyanax mexicanusfrom the river basins of the Gulf of Mexico slope are small freshwater fish that usually live in large groups in different freshwater environments. The group is considered successful due to its high capacity for dispersal and adaptation to different habitats, and the species present high morphological variability throughout their distribution in Mexico. This has produced the most extreme morphotype of the group; the hypogeous or troglobite, which has no eyes or coloration, and is probably the cause of taxonomic uncertainty in the recognition of species across the en

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Espinasa, Luis, Laurent Legendre, Julien Fumey, Maryline Blin, Sylvie Rétaux, and Monika Espinasa. "A new cave locality for Astyanax cavefish in Sierra de El Abra, Mexico." Subterranean Biology 26 (July 4, 2018): 39–53. https://doi.org/10.3897/subtbiol.26.26643.

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The characiform fish Astyanax mexicanus comes in two forms, a surface-dwelling morph which lives in the rivers of North and Central America and a blind, depigmented cave-dwelling morph which inhabits caves in Mexico. In recent years, this species has arguably become among the most influential model system for the study of evolutionary development and genomics in cave biology. While recent articles have analysed in great detail Astyanax genetics, development, physiology, phylogeny and behaviour, there have been comparatively few recent studies concerning its ecology and in particular its biogeo

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Soares, Daphne, Kathryn Gallman, Maria Elina Bichuette, and Eric S. Fortune. "Adaptive shift of active electroreception in weakly electric fish for troglobitic life." Frontiers in Ecology and Evolution 11 (September 1, 2023). http://dx.doi.org/10.3389/fevo.2023.1180506.

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The adaptive-shift hypothesis for the evolution of cave-dwelling species posits that ancestor species in surface habitats had exaptations for subterranean life that were exploited when individuals invaded caves. Weakly electric Gymnotiform fishes, nocturnal South American teleost fishes, have features that appear to be likely exaptations for troglobitic life. These fishes have active electrosensory systems in which fish generate weak electric fields that are detected by specialized electroreceptors. Gymnotiform fishes use their electric fields for navigation, prey capture (scene analysis), and

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Zepon, Tamires, Jonas Gallão, and Maria Elina Bichuette. "How much we know about Brazilian subterranean aquatic fauna." ARPHA Conference Abstracts 5 (July 14, 2022). http://dx.doi.org/10.3897/aca.5.e89658.

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The first study concerning Brazilian subterranean fauna was the description of the phreatobitic fish Phreatobius cistenarum Goeldi, 1905, followed by the stygobitic fish Pimelodella kronei (Miranda Ribeiro, 1907). After that, biospeleological studies mainly focused on terrestrial taxa description, and in 1972 the first stygobitic invertebrate, Aegla cavernicola Türkay, 1972 (Decapoda, Aeglidae), was described. Here, we provided an overview of the Brazilian subterranean aquatic fauna knowledge. To date, ca. 270 troglobitic species are described, of which 64 are aquatic (22 fishes; 42 invertebra

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Xu, Yuan, Yangyang Jing, Jing Zhou, et al. "Age, growth, and energy storage of the subterranean fish Triplophysa rosa (Cypriniformes: Nemacheilidae) from Chongqing, China." BMC Ecology and Evolution 23, no. 1 (2023). http://dx.doi.org/10.1186/s12862-023-02186-y.

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Abstract Background This study explores the age, growth, and energy storage of Triplophysa rosa, a troglobitic cavefish. A total of 102 wild T. rosa specimens were collected in Wulong County, Chongqing, China, between 2018 and 2022, with otoliths used for age determination. Results The earliest mature individuals were determined to be 4.8 years old, while the maximum ages for females and males were estimated at 15.8 years and 12.2 years, respectively. The length (L, cm)-weight (W, g) relationship was found to be the same for both sexes, following the eq. W = 0.0046 L3.03. Von Bertalanffy growt

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Zhao, Yincheng, Hongyu Chen, Chunqing Li, Shanyuan Chen, and Heng Xiao. "Comparative Transcriptomics Reveals the Molecular Genetic Basis of Cave Adaptability in Sinocyclocheilus Fish Species." Frontiers in Ecology and Evolution 8 (October 16, 2020). http://dx.doi.org/10.3389/fevo.2020.589039.

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Abstract:

Cavefish evolved a series of distinct survival mechanisms for adaptation to cave habitat. Such mechanisms include loss of eyesight and pigmentation, sensitive sensory organs, unique dietary preferences, and predation behavior. Thus, it is of great interest to understand the mechanisms underlying these adaptability traits of troglobites. The teleost genus Sinocyclocheilus (Cypriniformes: Cyprinidae) is endemic to China and has more than 70 species reported (including over 30 cavefish species). High species diversity and diverse phenotypes make the Sinocyclocheilus as an outstanding model for st

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