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Analysis by RAPD of the genetic structure of Astyanax altiparanae (Pisces, Characiformes) in reservoirs on the Paranapanema River, Brazil Genet. Mol. Biol.
Leuzzi,Maria Sueli Papa; Almeida,Fernanda Simões de; Orsi,Mário Luís; Sodré,Leda Maria Koelblinger.
In this study, the RAPD technique was used to analyze the genetic structure of populations of the fish Astyanax altiparanae (Characidae, Tetragonopterinae) living in the lower, middle and upper Paranapanema River, Brazil. The aim was to assess this structure regarding fish handling and conservation programs. The genetic variability (P) was found to be 42.64%, 75% and 75% in the low, middle and upper reaches, respectively. The dendrogram of genetic similarity, obtained by comparative analysis of the sets of samples from the three sites, showed the formation of three clusters. All of the genetic parameters used indicate that the population in the lower Paranapanema is genetically different from those in the middle and upper sections. The theta P test shows...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Astyanax altiparanae; RAPD; Genetic structure; Genetic conservation; Fish.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000300009
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Atividade alimentar de espécies de peixe do rio Tibagi, relacionada com o desenvolvimento de gordura e das gônadas Zoologia
Bennemann,Sirlei Terezinha; Orsi,Mário Luís; Shibatta,Oscar Akio.
The fish assemblage in a stretch of Tibagi river was studied during the period of one year, throught monthly sampling. It was observed that four fish species (Schizodon intermedius Garavello & Britski, 1990, Acestrorhynchus lacustris Reinhardt, 1874, Pimelodus maculatus Lacépède, 1803 and Steindachnerina insculpta Fernandez-Yepez, 1948) were very frequent and they represent all the main trophic groups. In order to characterize feeding activity, fat storage and reproduction the means degree of repletion, fat and maturation, obtained for each species in each month were compared among the four fish species. Steindachnerina insculpta, a detritivovous species was the one with the highest feeding activity while A. lacustris, a piscivorous fish, showed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish; Feeding activity; Gonadal development; Tibagi river; Paraná.
Ano: 1996 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751996000200018
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Biologia populacional de Astyanax altiparanae Garutti & Britski (Teleostei, Characidae) do médio Rio Paranapanema, Paraná, Brasil Zoologia
Orsi,Mário Luís; Carvalho,Edmir Daniel; Foresti,Fausto.
O objetivo desse trabalho foi a determinação da estrutura populacional da espécie. Foram escolhidos quatro locais de amostragem com características ambientais distintas na bacia do rio Tibagi. As amostragens foram realizadas mensalmente no período de janeiro de 1997 a fevereiro de 1998. Um total de 1553 indivíduos foram capturados, apresentando constância em todos os trechos, com as maiores abundâncias nos trechos do rio Congonhas (76 %). Variações ocorreram entre os trechos por fase de desenvolvimento e classes de comprimento e na distribuição espacial, demonstrando que a espécie apresenta estrutura populacional diferenciada. A espécie apresentou grande capacidade adaptativa exploratória, utilizando estratégias diferenciadas na estrutura da população. A...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ecologia; Peixes; Tibagi.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752004000200008
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Biologia reprodutiva de Astyanax scabripinnis paranae (Eigenmann) (Ostheichthyes, Characidae), do ribeirão das Marrecas, bacia do rio Tibagi, Paraná Zoologia
Veregue,Angela Maria Louzada; Orsi,Mário Luís.
Some aspects of the reproductive cycle of female "lambari", Astyanax scabripinnis paranae (Eigenmann, 1927) were studied. The specimens were collected in intervals of fifteen days, from September 1979, until November 1980, in the Marrecas creek (Irerê and Paiquerê districts), Londrina, Paraná, Brazil. The maturity scale was characterized in five stages: immature, maturation, spawning, spent, and resting, which was established by the gonad-somatic relation and the ovary morphology and microscopic aspects. The maturation curve and distribution of maturity stages show that the period of reproduction is very long; spawning extended from July to March. The gonad cycle is related to seasons: maturation occurs chiefly in the winter months, spawning specimens are...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Astyanax scabripinnis; Characidae; Biology; Reproduction; Tibagi river.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000100012
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Crescimento de Schizodon Intermedius Garavello & Britski (Ostheichthyes, Anostomidae) do Rio Tibagi (Sertanópolis, Paraná) Zoologia
Orsi,Mário Luís; Shibatta,Oscar Akio.
This work consists of age, growth, and circuli formation period determination and the relation of reproduction, temperature, and pluviosity on the growth of S. intermedius Garavello & Britski, 1990. The growth curve was adjusted by the Bertalanfy's expression and the relationship between weight and size was made by the minimum square method to determine the conditioning factor. Gonadossomatic index (IGS) was used to study the reproduction. The assintotic values for length were 33,94 cm and 44,81 cm for males and females, respectively. The circulus were formed annually and the growth was slow and the maximum age was determined to be nine years. The formation of the circuli was influenced by the reproduction, probably allied to other abiotic factors...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Schizodon intermedius; Age; Growth; Tibagi river.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000300009
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Dispersão de Lernaea cyprinacea (Linnaeus) (Crustácea, Copepoda) na região norte do estado do Paraná, Brasil Zoologia
Gabrielli,Mário Artur; Orsi,Mário Luís.
Inside of the parasitoses context in fish, the study was successful to us verified the lerniose was present in the north area of the State. It had reached the native fish in the basin of the river Tibagi. For the study, visits were made to the aquaculture and samples collected in the area of Sertanopolis on the river Tibagi. We verified that the lerniose was growing in the area and had already reached several species of native fish of the river Tibagi. This concein for ali the researchers of the area, as well as the producers of fish.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lernaea cyprinacea; Tibagi; Paranapanema; River.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000200010
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Escapes of non-native fish from flooded aquaculture facilities: the case of Paranapanema River, southern Brazil Rev. Bras. Zool.
Casimiro,Armando César Rodrigues; Garcia,Diego Azevedo Zoccal; Vidotto-Magnoni,Ana Paula; Britton,John Robert; Agostinho,Ângelo Antônio; Almeida,Fernanda Simões de; Orsi,Mário Luís.
ABSTRACT Non-native species are a major driver of biodiversity loss. Aquaculture activities play a key role in introductions, including the escape of fishes from fish farm facilities. Here, the impact of flooding due to El Niño rains in 2015/2016 in the Lower and Middle Paranapanema River basin, southern Brazil, was investigated by evaluating fish escapes from 12 fish farms. The flooding resulted in the escape of approximately 1.14 million fishes into the river, encompassing 21 species and three hybrids. Non-native species were the most abundant escapees, especially Oreochromis niloticus (Linnaeus, 1758) and Coptodon rendalli (Boulenger, 1897) (96% of all fish). Only seven native fishes were in the escapee fauna, comprising 1% of all fish. Large floods,...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Biological invasion; Climate change; Fish farming; Paraná River; Propagule pressure..
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702018000100504
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Fish passage ladders from Canoas Complex - Paranapanema River: evaluation of genetic structure maintenance of Salminus brasiliensis (Teleostei: Characiformes) Neotropical Ichthyology
Lopes,Carla Martins; Almeida,Fernanda Simões de; Orsi,Mário Luís; Britto,Sandro Geraldo de Castro; Sirol,Rodolfo Nardez; Sodré,Leda Maria Koelblinger.
The aim of this study, utilizing RAPD techniques, was to determine the genetic variability of Salminus brasiliensis groups collected at passage ladders of the hydroelectric plants (HEP) Canoas I and Canoas II - Paranapanema River (Brazil), as well as to estimate the population structure through different parameters of genetic diversity. The data obtained allowed us to conclude that S. brasiliensis of the Canoas Complex has a moderate index of genetic variability ( > 42.00%) when compared to that of other migratory fish species. All genetic diversity analyses (distance = 0.015 and genetic identity = 0.985, F ST =0.018, AMOVA) were signs of low genetic differentiation, and they led to the clustering of S. brasiliensis from Canoas I and Canoas II. This...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish transposition; Geneticdiversity; RAPD.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000200006
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Genetic diversity of the species Leporinus elongatus (Teleostei: Characiformes) in the Canoas Complex - Paranapanema River Neotropical Ichthyology
Ramos,Juliano Vilas Boas; Sodré,Leda Maria Koelblinger; Orsi,Mário Luís; Almeida,Fernanda Simões de.
Dams constructed along waterways interrupt the dispersion and migration of aquatic organisms, affecting mainly the abundance of migratory fish species. Translocation mechanisms have been constructed at dams aiming to minimize their impact on fish species migration behavior. There is little information available about the effect of the construction of dams on the genetic structure of the Neotropical migratory fish fauna. Therefore, RAPD molecular markers and microsatellites were utilized to evaluate the diversity and genetic structure of the migratory species Leporinus elongatus (piapara) in the Canoas Complex - Paranapanema River - Brazil. Ten groups were sampled in the fish ladders of the hydroelectric dam Canoas I and Canoas II during the reproductive...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dams; Fish ladder; Genetic structure; Microsatellite; RAPD.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000400015
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Ocorrência e ecologia trófica de quatro espécies de Astyanax (Characidae) em diferentes rios da bacia do rio Tibagi, Paraná, Brasil Iheringia, Sér. Zool.
Bennemann,Sirlei Terezinha; Gealh,Ana Maria; Orsi,Mário Luís; Souza,Leda Maria de.
Na bacia do rio Tibagi, trechos dos rios Fortaleza, Iapó e Tibagi foram amostrados mensalmente, de maio de 2001 a abril de 2002, com tarrafas e redes de espera de diferentes malhagens. Foram capturados indivíduos de quatro espécies de Astyanax. Para conhecer como essas espécies utilizam o hábitat desses rios, foi calculada a constância, e as freqüências em número de exemplares foram comparadas pela análise de similaridade Bray-Curtis. A composição percentual dos alimentos consumidos foi ordenada usando-se a Análise de Componentes Principais (ACP). As proporções dos recursos alimentares foram avaliadas e classificadas quanto à natureza (animal ou material vegetal) e origem (alóctone e autóctone). A constância e a baixa similaridade na abundância revelaram...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Astyanax; Ecologia trófica; Bacia do rio Tibagi; Rios.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212005000300004
Registros recuperados: 10
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