scholarly journals Hematological characteristics, frequency of micronuclei and nuclear abnormalities in peripheral of fish from São Francisco river Basin, Minas Gerais State, Brazil

Author(s):  
Robson Seriani ◽  
Maria José Tavares Ranzani-Paiva ◽  
Ângela Teresa Silva-Souza ◽  
Silvia Roseli Napoleão
Check List ◽  
2015 ◽  
Vol 11 (4) ◽  
pp. 1695
Author(s):  
Gilberto N. Salvador ◽  
Gustavo R. Rosa ◽  
Gabriel Caetano Guimarães Mello ◽  
Fábio Firpe

Megalancistrus barrae is a species endemic to the São Francisco River basin that has not previously been recorded from the Upper São Francisco basin.The present work increases the known distribution of the species by reporting new collections from two different regions in the Upper São Francisco basin: one in the Pará River and the other in the São Francisco River, downstream Três Marias dam, Minas Gerais state. In addition, this study compiles distributional data on Megalancistrus barrae from museums. 


2015 ◽  
Vol 24 (2) ◽  
pp. 129-135 ◽  
Author(s):  
Danielle Priscilla Correia Costa ◽  
Cassandra Moraes Monteiro ◽  
Marilia Carvalho Brasil-Sato

A total of 103 specimens of Hoplias intermedius (Günther, 1864) and 86 specimens of H. malabaricus (Bloch, 1794) from the upper São Francisco River, State of Minas Gerais were collected between April 2011 and August 2013, and their parasitic fauna were investigated. Four species of Digenea were found: metacercariae of Austrodiplostomum sp., and Ithyoclinostomum sp.; and adult specimens of Phyllodistomum spatula Odhner, 1902, and Pseudosellacotyla lutzi (Freitas, 1941) Yamaguti, 1954. The prevalence of the metacercariae was higher than that of the adult digeneans of erythrinids from the upper São Francisco River as a result of piscivorous feeding habits of these adult erythrinids. The presence of metacercariae and adult digeneans indicate that they act as intermediate and definitive hosts, respectively, in their biological cycles. Hoplias intermedius is a new host for the four species of Digenea, and the São Francisco River basin is a new location for the known geographical distributions of P. spatula and P. lutzi.


2016 ◽  
Vol 38 (2) ◽  
pp. 15
Author(s):  
R. M. G. VIEIRA ◽  
C. P. DERECZYNSKI ◽  
S. C. CHOU ◽  
J. L. GOMES ◽  
A. C. PAIVA NETO

2008 ◽  
Vol 53 (3) ◽  
Author(s):  
Vernon Thatcher ◽  
Michelle Santos ◽  
Marilia Brasil-Sato

AbstractGamidactylus piranhus sp. nov. (Copepoda, Vaigamidae) from the nasal fossae of “San Francisco piranha”, Pygocentrus piraya (Cuvier, 1819) and.White piranha. Serrasalmus brandtii (Lütken, 1875) is described. The new species is similar to the type species of the genus, Gamidactylus jaraquensis Thatcher et Boeger, 1984, but differs from it in the following respects: the cephalothorax is shorter, the free thoracic segments are usually longer, leg 5 is reduced to a simple seta and a spine on the second antennal segment is lacking. Gamidactylus bryconis Varella, 1995 and Gamidactylus hoplius Varella et Malta, 1996, do not closely resemble the new species because they are much larger and both present leg 5 reduced to a double seta.


2007 ◽  
Vol 52 (3) ◽  
Author(s):  
Michelle Santos ◽  
Vernon Thatcher ◽  
Marilia Brasil-Sato

AbstractBrasergasilus bifurcatus sp. nov. (Copepoda, Ergasilidae, Abergasilinae) is described. Specimens of the new species were collected from the gills and nasal fossae of the serrasalmid fishes, known as “piranhas”, Pygocentrus piraya (Cuvier, 1819) and “pirambebas”, Serrasalmus brandtii (Lütken, 1875). The fishes were netted in the Três Marias Reservoir (18°12′59″S, 45°17′34″W) of the upper São Francisco River, Minas Gerais State, Brazil. The new species differs from its congeners by the following characters: the specific setation on the antennule; the terminal barb of the antenna; the deeply bifurcate distal segment of the mandible; the chalice-shaped genital complex; a conspicuous external indentation of the second segment of the first endopod and a very short terminal segment of the first exopod.


Check List ◽  
2015 ◽  
Vol 11 (1) ◽  
pp. 1507 ◽  
Author(s):  
Udson Santos ◽  
Priscilla Caroline Silva ◽  
Lucas Caetano Barros ◽  
Jorge Abdala Dergam

The Area of Environmental Protection of the Pandeiros River is the largest unit for sustainable use in Minas Gerais state, Brazil. The Pandeiros Wetland in the lower part of this river is considered a nursery for most migratory fish species of the São Francisco River and it is currently threatened by the introduced peacock-bass Cichla piquiti (Kullander & Ferreira, 2006). In this study, a list of fish species from the Pandeiros River was developed and compared with data for populations from other regions in the São Francisco basin. The presence of a new species record for the São Francisco River basin in the Pandeiros, and the particular local biotic and abiotic conditions of that river, support its recognition as an important conservation unit within the basin.


Zootaxa ◽  
2018 ◽  
Vol 4429 (1) ◽  
pp. 195
Author(s):  
MARCOS CARNEIRO NOVAES ◽  
DIOGO SILVA VILELA ◽  
VINICIUS MARQUES LOPEZ ◽  
RHAINER GUILLERMO NASCIMENTO FERREIRA

Specimens of Anacroneuria Klapálek 1909 (Plecoptera: Perlidae) and Tupiperla Froehlich 1969 (Plecoptera: Gripopterygidae) from the headwater springs of the National Integration River (São Francisco River), Serra da Canastra National Park, in Minas Gerais State, of southeastern Brazil, were studied. A new species, Anacroneuria saofrancisco n. sp. is described and the descriptions of the nymph and the female of A. saofrancisco are also presented. 


ForScience ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. e00846
Author(s):  
Pedro Luiz Teixeira Camargo ◽  
Paulo Pereira Martins Júnior ◽  
Marcílio Baltazar Teixeira ◽  
Fernando Antônio Madeira ◽  
Raphaella karla Portes Beserra ◽  
...  

A gestão dos recursos naturais embasada no modelo do desenvolvimento sustentável é, sem dúvida, um dos maiores desafios de gestão ambiental. Para isso, técnicas de sensoriamento remoto têm sido cada vez mais usadas objetivando um melhor e maior auxílio à decisão. Na margem Noroeste (B) do município de São Francisco, Norte de Minas Gerais, localizado na bacia alto-média do rio São Francisco e onde o Cerrado natural sofreu intensa degradação no intervalo de 41 anos (1975-2016), realizou-se o presente estudo, objetivando, por meio da metodologia de sobreposição de imagens cartográficas, utilizando-se a ferramenta IDW do software Arcgis 10.2 gerar um mapa capaz de apresentar a média populacional da Goiaba (Psidium guajava) por ponto de coleta. Pode-se concluir, após a exitosa experiência metodológica aqui presente, que os seus exemplares arbóreos se localizam prioritariamente no extremo Sul da margem B, sendo interessante pensar como esta espécie, mesmo oriunda do Cerrado não se adaptou tão bem na área estudada. Uma hipótese para explicar isso se dá pelo fato de a semente da goiaba sofrer quebra de dormência, em geral, quando se tem flutuações abruptas de temperatura, algo não observado no local, com exceção das margens do rio São Francisco, exatamente o local onde se observa a presença dessa frutífera em maior quantidade. Recomendam-se mais estudos na região para verificação se a hipótese apresentada é de fato correta. Palavras-chave: Bacia do Rio São Francisco. Sensoriamento remoto. Métodos e técnicas de auxílio à decisão.   Use of sigs for generation of maps with the goiaba (Psidium guajava) middle location in the northwest margin of the São Francisco Municipal, São Francisco water, MG Abstract Managing natural resources responsibly is undoubtedly one of the biggest environmental management challenges. Thus, remote sensing techniques have been increasingly used to better and better aid decision making. In the Northwest (B) portion of the municipality of São Francisco, North of Minas Gerais, located in the upper-middle São Francisco River basin and where the natural Cerrado suffered intense degradation in the 41year interval (1975-2016), we conducted the present study, aiming, through the methodology of overlapping cartographic images, using the IDW tool of Arcgis 10.2 software to generate a map capable of presenting the population average of Goiaba (Psidium guajava) by collection point. We can conclude, after the successful methodological experience present here, that its tree specimens are located primarily in the extreme south of margin B, it is interesting to think how this species, even coming from the Cerrado, did not adapt so well in the studied area. A good hypothesis to explain this is due to the fact that the guava seed suffers from dormancy, in general, when there are abrupt fluctuations in temperature, something not observed in the place, except for the banks of the São Francisco River, exactly the place where observes the presence of this fruit in greater quantity. Further studies in the region are recommended to verify whether the hypothesis presented is indeed correct. Keywords: São Francisco river basin. Remote sensing. Decision support methods and Ttechniques.


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