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Article ; Online: Rediscovery of Rhyacoglanis pulcher (Boulenger, 1887) (Siluriformes: Pseudopimelodidae), a rare rheophilic bumblebee catfish from Ecuadorian Amazon.

Chuctaya, Junior / Shibatta, Oscar Akio / Encalada, Andrea C / Barragán, Karla S / Torres, Maria de Lourdes / Rojas, Estefanía / Ochoa-Herrera, Valeria / Ferrer, Juliano

PloS one

2023 Volume 18, Issue 7, Page(s) e0287120

Abstract: Rhyacoglanis pulcher is a rare Neotropical rheophilic bumblebee catfish known only from the type locality in the Cis-Andean Amazon region, Ecuador, and the type-species of the genus. So far, the three syntypes collected in 1880 were the only specimens ... ...

Abstract	Rhyacoglanis pulcher is a rare Neotropical rheophilic bumblebee catfish known only from the type locality in the Cis-Andean Amazon region, Ecuador, and the type-species of the genus. So far, the three syntypes collected in 1880 were the only specimens unambiguously associated to the name R. pulcher available in scientific collections. Recently, a specimen was discovered in a fast-flowing stretch of the Villano river, a tributary of the Curaray river, Napo river basin, Ecuador, representing a new record after nearly 140 years. Here, we present this new record, identified by morphology, provide the DNA barcode sequence of the specimen, and propose why the species of Rhyacoglanis are scarce in zoological collections. Additionally, we discuss the intraspecific variation in the color pattern observed in R. pulcher.
MeSH term(s)	Animals ; Catfishes/genetics ; Ecuador ; Rivers
Language	English
Publishing date	2023-07-12
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2267670-3
ISSN	1932-6203 ; 1932-6203
ISSN (online)	1932-6203
ISSN	1932-6203
DOI	10.1371/journal.pone.0287120
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Cryptic diversity and diversification processes in three cis-Andean Rhamdia species (Siluriformes: Heptapteridae) revealed by DNA barcoding.

Ribolli, Josiane / Zaniboni Filho, Evoy / Scaranto, Bianca Maria Soares / Shibatta, Oscar Akio / Machado, Carolina Barros

Genetics and molecular biology

2021 Volume 44, Issue 3, Page(s) e20200470

Abstract: The wide distribution of the Neotropical freshwater catfish Rhamdia offers an excellent opportunity to investigate the historical processes responsible for modeling South America's hydrogeological structure. We used sequences from cis-Andean and ... ...

Abstract	The wide distribution of the Neotropical freshwater catfish Rhamdia offers an excellent opportunity to investigate the historical processes responsible for modeling South America's hydrogeological structure. We used sequences from cis-Andean and Mesoamerican Rhamdia species to reconstruct and estimate divergence times among cis-Andean lineages, correlating the results with known geological events. Species delimitation methods based on distance (DNA barcoding and BIN) and coalescence (GMYC) approaches identified nine well-supported lineages from the cis-Andean region from sequences available in the BOLD dataset. The cis-Andean Rhamdia lineages diversification process began in Eocene and represented the split between cis-Andean and Mesoamerican clades. The cis-Andean clade contains two principal groups: Northwest clade (MOTUs from Amazon, Essequibo, Paraguay, and Itapecuru basins) and Southeast clade (Eastern Brazilian shield basins (Paraná, Uruguay, Iguaçu, and São Francisco) plus eastern coastal basins). The diversification of the cis-Andean Rhamdia lineages results from vicariance and geodispersion events, which played a key role in the current intricate distribution pattern of the Rhamdia lineages. The wide geographical distribution and large size of the specimens make it attractive to cultivate in different countries of the Neotropical region. The lineages delimitation minimizes identification mistakes, unintentional crossings by aquaculture, and reduces natural stocks contamination.
Language	English
Publishing date	2021-07-12
Publishing country	Brazil
Document type	Journal Article
ZDB-ID	1445712-x
ISSN	1678-4685 ; 1415-4757
ISSN (online)	1678-4685
ISSN	1415-4757
DOI	10.1590/1678-4685-GMB-2020-0470
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Ichthyofauna in the last free-flowing river of the Lower Iguaçu basin: the importance of tributaries for conservation of endemic species.

Pini, Suelen Fernanda Ranucci / Makrakis, Maristela Cavicchioli / Neves, Mayara Pereira / Makrakis, Sergio / Shibatta, Oscar Akio / Kashiwaqui, Elaine Antoniassi Luiz

ZooKeys

2021 Volume 1041, Page(s) 183–203

Abstract: The fish fauna from the Lower Iguaçu River and tributaries upstream of the Iguaçu Falls, the last free-flowing river stretch, were investigated. Twenty five sites in tributaries and the main channel were sampled between 2010 and 2016 using several kinds ... ...

Abstract	The fish fauna from the Lower Iguaçu River and tributaries upstream of the Iguaçu Falls, the last free-flowing river stretch, were investigated. Twenty five sites in tributaries and the main channel were sampled between 2010 and 2016 using several kinds of fishing gear. The species were categorized according to their size, origin, and conservation status. Species richness and abundance in the main channel and tributaries were compared. In total, 87,702 specimens were recorded, comprising 76 species, 25 families, 53 genera, and eight orders. Characiformes and Siluriformes were the richest orders, representing 92% of the total specimens; Characidae, Cichlidae, Pimelodidae, and Loricariidae were the richest families. The fish fauna was composed of small and medium-sized species and included endemic (42%), autochthonous (24%), allochthonous (21%), and exotic (9%) species, as well as hybrids (4%). Significant differences in the relative numerical abundance of species were found among sites.
Language	English
Publishing date	2021-06-03
Publishing country	Bulgaria
Document type	Journal Article
ZDB-ID	2445640-8
ISSN	1313-2970 ; 1313-2989
ISSN (online)	1313-2970
ISSN	1313-2989
DOI	10.3897/zookeys.1041.63884
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Article: Ichthyofauna in the last free-flowing river of the Lower Iguaçu basin: the importance of tributaries for conservation of endemic species

Pini, Suelen Fernanda Ranucci / Makrakis, Maristela Cavicchioli / Neves, Mayara Pereira / Makrakis, Sergio / Shibatta, Oscar Akio / Kashiwaqui, Elaine Antoniassi Luiz

ZooKeys. 2021 June 03, v. 1041

2021

Abstract	The fish fauna from the Lower Iguaçu River and tributaries upstream of the Iguaçu Falls, the last free-flowing river stretch, were investigated. Twenty five sites in tributaries and the main channel were sampled between 2010 and 2016 using several kinds of fishing gear. The species were categorized according to their size, origin, and conservation status. Species richness and abundance in the main channel and tributaries were compared. In total, 87,702 specimens were recorded, comprising 76 species, 25 families, 53 genera, and eight orders. Characiformes and Siluriformes were the richest orders, representing 92% of the total specimens; Characidae, Cichlidae, Pimelodidae, and Loricariidae were the richest families. The fish fauna was composed of small and medium-sized species and included endemic (42%), autochthonous (24%), allochthonous (21%), and exotic (9%) species, as well as hybrids (4%). Significant differences in the relative numerical abundance of species were found among sites. Ancistrus mullerae and Rhamdia branneri (endemic) were indicator species for tributaries inside of Iguaçu National Park (INP), while Phalloceros harpagos (autochthonous) and Ictalurus punctatus (exotic) for tributaries outside of INP and Odontesthes bonariensis (allochthonous) for the main channel. The last dam-free stretch of the Lower Iguaçu River and tributaries upstream the Iguaçu Falls exhibits a rich endemic fish fauna, including some rare, endangered species (Steindachneridion melanodermatum, Gymnogeophagus taroba, and Psalidodon gymnogenys). These findings are essential to predict and understand the effects caused by the new Baixo Iguaçu Hydroelectric Power Plant and highlight the importance of tributaries and Iguaçu National Park for conservation of endemic species.
Keywords	Ancistrus ; Characidae ; Gymnogeophagus ; Ictalurus punctatus ; Odontesthes bonariensis ; Phalloceros harpagos ; Rhamdia ; Steindachneridion ; basins ; conservation status ; fauna ; fish ; hydroelectric power ; indicator species ; indigenous species ; national parks ; power plants ; rivers ; species richness
Language	English
Dates of publication	2021-0603
Size	p. 183-203.
Publishing place	Pensoft Publishers
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	2445640-8
ISSN	1313-2970 ; 1313-2989
ISSN (online)	1313-2970
ISSN	1313-2989
DOI	10.3897/zookeys.1041.63884
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: External Morphology of Lophiosilurus alexandri Steindachner, 1876 during Early Stages of Development, and Its Implications for the Evolution of Pseudopimelodidae (Siluriformes).

Assega, Fernando Massayuki / Birindelli, José Luís Olivan / Bialetzki, Andréa / Shibatta, Oscar Akio

PloS one

2016 Volume 11, Issue 4, Page(s) e0153123

Abstract: Pseudopimelodidae are Neotropical catfishes characterized by having slightly to strongly depressed body in fully developed specimens. The largest species of the family with 500 mm SL, Lophiosilurus alexandri, experiences impressive changes in body shape ... ...

Abstract	Pseudopimelodidae are Neotropical catfishes characterized by having slightly to strongly depressed body in fully developed specimens. The largest species of the family with 500 mm SL, Lophiosilurus alexandri, experiences impressive changes in body shape during development, becoming extremely depressed when fully developed. Accordingly, Lophiosilurus alexandri is an ideal species to observe the morphological changes during ontogeny, and to seek solid interpretations on the polarity of characters. Specimens of distinct larval periods (yolk sac, flexion and postflexion; n = 186 specimens) and juvenile stages (n = 20) were analyzed. Changes in body shape, position of mouth and eye, morphology of fins and pigmentation were observed during the development of Lophiosilurus. Larvae (5.7-11.2 mm standard length) had pigmentation concentrated on the head and parts of body, eyes small and pigmented, short barbels, and well-developed finfold. Juveniles (15.9-28.1 mm standard length) had body shape similar to adult, with head depressed and bearing bony ridges, large mouth, dorsally-oriented eyes, small barbels and well-developed shoulder bulges (cleithral width). The greatest morphological changes in the development of L. alexandri occurred during the postflexion larval stage. Relative to standard length, measurements of snout length, head depth and body depth are smaller in juveniles than in larvae, but body width is larger. New interpretations on the phylogenetic characters related to these changes are provided in view of the two alternative hypotheses of the evolution of Pseudopimelodidae.
MeSH term(s)	Aging/physiology ; Animals ; Biological Evolution ; Catfishes/anatomy & histology ; Catfishes/classification ; Catfishes/growth & development ; Catfishes/physiology ; Larva/anatomy & histology ; Life Cycle Stages/physiology ; Movement
Language	English
Publishing date	2016-04-15
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	1932-6203
ISSN (online)	1932-6203
DOI	10.1371/journal.pone.0153123
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Deep Pools: Ecological Sanctuaries for Steindachneridion melanodermatum, a Large Endemic and Endangered Pimelodid of the Iguaçu River

Assumpção, Lucileine de / Makrakis, Maristela Cavicchioli / Silva, Jhony Ferry Mendonça da / Moraes, Karane Allison Silvestre de / Pini, Suelen Fernanda Ranucci / Silva, Patrícia Sarai da / Kashiwaqui, Elaine Antoniassi Luiz / Gentil, Eduardo / Souza-Shibatta, Lenice / Shibatta, Oscar Akio / Makrakis, Sergio

Water. 2021 June 19, v. 13, no. 12

2021

Abstract: Steindachneridion melanodermatum, an endemic and endangered species, is the largest catfish in the Lower Iguaçu River basin. Currently, the wild population of this species no longer exists in most of this basin, probably due to the loss of habitat by ... ...

Abstract	Steindachneridion melanodermatum, an endemic and endangered species, is the largest catfish in the Lower Iguaçu River basin. Currently, the wild population of this species no longer exists in most of this basin, probably due to the loss of habitat by successive hydroelectric dams. This study evaluated the spatial distribution and abundance of S. melanodermatum in the last free-flowing river stretch of approximately 190 km downstream from the Salto Caxias Dam, upstream of the Iguaçu Falls, as well as some tributaries. Hydroacoustic and fishing campaigns were performed between September 2010 to December 2016 to characterize the preferred habitat. A total of 180 specimens was sampled with higher abundances in a protected area near Iguaçu Falls in the Iguaçu National Park. Twenty-four deep pools were identified with maximum depths ranging from 5 to 25 m: 21 pools were along the main channel of the Iguaçu River, and three pools were in tributaries. Deep pools are preferential habitats for this species, especially the deep pool called Poço Preto (P23) and its surroundings. Conservation strategies are required to protect these habitats and prevent S. melanodermatum from becoming extinct, such as establishing deep pools as ecological sanctuaries, intensifying the inspection of illegal fishing, and maintaining dam-free tributaries.
Keywords	Steindachneridion ; basins ; catfish ; conservation areas ; endangered species ; habitats ; hydroacoustics ; national parks ; rivers ; water ; watersheds
Language	English
Dates of publication	2021-0619
Publishing place	Multidisciplinary Digital Publishing Institute
Document type	Article
ZDB-ID	2521238-2
ISSN	2073-4441
ISSN	2073-4441
DOI	10.3390/w13121700
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Plasticidade alimentar em Rivulus pictus Costa (Osteichthtyes, Cyprinodontiformes, Rivulidae) de uma pequena lagoa em Brasília, Distrito Federal, Brasil

Shibatta Oscar Akio / Bennemann Sirlei Terezinha

Revista Brasileira de Zoologia, Vol 20, Iss 4, Pp 615-

2003 Volume 618

Abstract: Rivulus pictus has a wide distribution in Distrito Federal and lives in different environments, including small lakes. The analysis of gastric and intestinal contents showed that most of the 21 ingested food items were from autochthonous origin and ... ...

Abstract	Rivulus pictus has a wide distribution in Distrito Federal and lives in different environments, including small lakes. The analysis of gastric and intestinal contents showed that most of the 21 ingested food items were from autochthonous origin and characterized the diet of an omnivorous fish with a trend to planktivory. Five feeding items were important in the composition of the alimentary spectrum and revealed that food resources are explored near water surface (Acari), in the water column (Copepoda, Cladocera and Closterium sp.) and also in the bottom (Chironomidae). The varied diet and the capacity to explore all levels of the environment evidenced that feeding flexibility is one of the factors that facilitates the survival of this species in different environments.
Keywords	Diet ; feeding spectrum ; ecology ; Science ; Q ; Zoology ; QL1-991
Language	English
Publishing date	2003-01-01T00:00:00Z
Publisher	Sociedade Brasileira de Zoologia
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Diversity of the Astyanax scabripinnis species complex (Teleostei: Characidae) in the Atlantic Forest, Brazil: species limits and evolutionary inferences

Castro, Jonathan Pena / Moura, Mauricio Osvaldo / Moreira-Filho, Orlando / Shibatta, Oscar Akio / Santos, Mateus Henrique / Nogaroto, Viviane / Vicari, Marcelo Ricardo / de Almeida, Mara Cristina / Artoni, Roberto Ferreira

Reviews in fish biology and fisheries. 2015 Mar., v. 25, no. 1

2015

Abstract: The Astyanax scabripinnis species complex with its wide geographical distribution is an excellent model for evolutionary studies. Populations are usually geographically isolated but also, in some cases, occur in sympatry. In this study, five allopatric ... ...

Abstract	The Astyanax scabripinnis species complex with its wide geographical distribution is an excellent model for evolutionary studies. Populations are usually geographically isolated but also, in some cases, occur in sympatry. In this study, five allopatric and/or sympatric populations of A. scabripinnis were analysed using geometric morphometry, cytogenetic markers, assays for induced breeding and phylogenetic inferences to draw conclusions on species limits and speciation processes in a natural setting. The morphometry of individuals indicated that the populations were well differentiated from each other. Cytogenetic evidence revealed a more conserved karyotypic macrostructure; however, molecular cytogenetic results obtained by in situ hybridization indicated 5S and 18S rDNA gene probe locations specific to each population. The reproduction tests for three locations suggest isolation between populations and the phylogenetic analyses suggest that the fish evaluated cluster in a monophyletic group. The combined data indicate that individuals are adapted to different environments in a complex evolutionary scenario, with linkage of populations during a recent geological period. However, due to reproductive isolation, the populations are evolving independently, reinforcing the existence of distinct cryptic species.
Keywords	Astyanax scabripinnis ; breeding ; cytogenetics ; fish ; forests ; genes ; geographical distribution ; in situ hybridization ; models ; monophyly ; morphometry ; reproductive isolation ; ribosomal DNA ; sympatry ; Brazil
Language	English
Dates of publication	2015-03
Size	p. 231-244.
Publishing place	Springer-Verlag
Document type	Article
ZDB-ID	1498719-3
ISSN	1573-5184 ; 0960-3166
ISSN (online)	1573-5184
ISSN	0960-3166
DOI	10.1007/s11160-014-9377-3
Database	NAL-Catalogue (AGRICOLA)

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Article: A new species of the genus Pimelodus La Cépède, 1803 from the rio Iguaçu basin and a reappraisal of Pimelodus ortmanni Haseman, 1911 from the rio Paraná system, Brazil (Ostariophysi: Siluriformes: Pimelodidae)

Garavello, Julio Cesar(Universidade Federal de São Carlos Departamento de Ecologia e Biologia Evolutiva) / Shibatta, Oscar Akio(Universidade Estadual de Londrina Centro de Ciências Biológicas Departamento de Biologia Animal e Vegetal)

Neotropical Ichthyology

2007/09

Abstract: A new species, Pimelodus britskii, is described from the rio Iguaçu in the rio Paraná drainage, on the border of Paraná and Santa Catarina states, Brazil. Specimens of this species were wrongly included in the type series of Pimelodus ortmanni. Pimelodus ...

Abstract	A new species, Pimelodus britskii, is described from the rio Iguaçu in the rio Paraná drainage, on the border of Paraná and Santa Catarina states, Brazil. Specimens of this species were wrongly included in the type series of Pimelodus ortmanni. Pimelodus britskii is distinguished from its congeners by color pattern, having circular dark brown blotches usually smaller than one orbital diameter, regularly and scattered along the trunk. Differs from P. ortmanni by the following characters: body depth at posterior cleithral process greater than head length; lips not prominent; and maxillary barbel reaching or surpassing vertical drawn through median of adipose fin. Pimelodus britskii represents the second species of the genus Pimelodus from the rio Iguaçu basin.
Language	English
Document type	Article
ISSN	1679-6225
Database	AGRIS - International Information System for the Agricultural Sciences and Technology

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Article: A new species of Microglanis (Siluriformes: Pseudopimelodidae) from upper rio Paraná basin, Brazil

Shibatta, Oscar Akio(Universidade Estadual de Londrina Museu de Zoologia , Universidade Estadual de Londrina Centro de Ciências Biológicas Departamento de Biologia Animal e Vegetal) / Benine, Ricardo Cardoso(Universidade Estadual de Londrina Museu de Zoologia , Universidade Estadual de Londrina Centro de Ciências Biológicas Departamento de Biologia Animal e Vegetal)

Neotropical Ichthyology

2005/12

Abstract: Microglanis garavelloi, new species, collected in tributaries of rio Paranapanema and rio Tietê, is the first species of the genus described from upper rio Paraná basin. The new species can be distinguished from other species of Microglanis on ... ...

Abstract	Microglanis garavelloi, new species, collected in tributaries of rio Paranapanema and rio Tietê, is the first species of the genus described from upper rio Paraná basin. The new species can be distinguished from other species of Microglanis on morphometric characters, color pattern, caudal-fin shape, pectoral-spine morphology and lateral line development. Characters used specifically to distinguish M. garavelloi from M. cottoides (laguna dos Patos and rio Uruguay basins) and M. parahybae (rio Paraíba do Sul basin) include morphometrics, color pattern and pectoral-spine serration.
Language	English
Document type	Article
ISSN	1679-6225
Database	AGRIS - International Information System for the Agricultural Sciences and Technology

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