17 results on '"Uwe Horst Schulz"'
Search Results
2. How Far Upstream: A Review of Estuary-Fresh Water Fish Movements in a Large Neotropical Basin
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Nelson Ferreira Fontoura, Uwe Horst Schulz, Thaís Paz Alves, Thiago Cesar Lima Silveira, Joana Jordão Pereira, and Débora Alessandra Antonetti
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estuarine fish ,ecosystem connectivity ,amphidromous ,anadromous ,catadromous ,potadromous ,Science ,General. Including nature conservation, geographical distribution ,QH1-199.5 - Abstract
The present study comprises the first systematic analysis of the limits of upstream movement by some fish species that use the estuarine area of the Patos Lagoon basin in southern Brazil. The Sinos River sampling program included 86 sites, sampled from 1998 to 2014, covering lowland stretches and headwater streams. The Guaíba sampling program was conducted from February 2011 to March 2013 and comprised 59 independent samples. Six fish species using estuarine areas occur in the upper Patos basin, 250–500 km from the Patos Lagoon outlet to the Atlantic Ocean. Parapimelodus nigribarbis specimens ranged from 11.3 to 18.9 cm (median = 13.3 cm) in length, i.e., were adults (Sinos, n = 459; Guaíba, n = 149). The species was captured almost 500 km from the Patos outlet, as far as 180 km upstream in the Sinos main channel. In Guaíba Lake, the species was captured mainly in autumn, although it was more abundant in winter and spring in the Sinos River. Lycengraulis grossidens was captured in the Sinos Basin, restricted to the lower stretches in spring and summer months (n = 7). In Guaíba Lake (n = 134) the species occurred throughout the lake and year-round, and was ten times more abundant in spring. Most specimens were adult (8.2–26.9 cm, median = 20.0 cm). Most Micropogonias furnieri individuals (n = 63) were juveniles (10.7–33.4 cm, median = 14.2 cm). The species was not captured in the Sinos Basin. In Guaíba Lake M. furnieri occurred predominantly in the southernmost part (downstream) and was more abundant (>10×) in winter. Genidens genidens (n = 27) was captured only in summer in the southern part of Guaíba Lake (closest to the outlet). Most individuals were adults (24.5–34.0 cm, median = 27.8 cm). Genidens barbus (n = 7) was restricted to spring and summer months and was captured only in southern (near-outlet) parts of Guaíba Lake, comprising mainly large juveniles and adults (31.5–68.0 cm, median = 37.9). Mugil liza (n = 13) appeared in spring in relatively low abundances but was widespread throughout Guaíba Lake during the summer. The species was not captured in the Sinos sampling program. The size profile comprised specimens nearing maturity (34.3–45.5 cm, median = 38.9 cm). Finally, we suggest possible biological cycles for these species that combine these new distribution data with published information.
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- 2019
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3. Responses of the phytoplankton functional structure to the spatial and temporal heterogeneity in a large subtropical shallow lake
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Luciane Oliveira Crossetti, Lacina Maria Freitas-Teixeira, Juliana Elisa Bohnenberger, Uwe Horst Schulz, Lúcia Ribeiro Rodrigues, and David da Motta-Marques
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traços funcionais ,tamanho ,grupo funcional ,zona litoral ,zona pelágica ,Ecology ,QH540-549.5 - Abstract
Abstract Aim Studies on biological communities that take into account only the species composition and abundances (or biomass) and their relative contributions, most of the time, do not reflect their ecological functions, especially considering the wide spatial and temporal variation of large shallow lakes. This paper aimed at evaluating the influence of environmental spatial and temporal heterogeneity on the functional structure of phytoplankton in a subtropical large shallow lake. Methods Seasonal samplings were carried out in 2010 and 2011, in 19 sampling sites distributed along the entire length (90 km) and width (3-10 km) of Lake Mangueira, a large (820 km2 ) and shallow lake (zmean = 2.6 m), comprising the littoral and pelagic zones of the north, central and southern regions. Abiotic variables and phytoplankton functional traits (volume, maximum linear dimension, life forms) and functional groups were analyzed as measures of functional structure. Results The results showed that there was no spatial organization of phytoplankton functional traits during the study. Colonial non-flagellated organisms, organisms with cellular volume between 103 and 104 μm3 and greater than 104 μm3, and with maximum linear dimension between 21 and 50 μm prevailed in all zones and regions. Phytoplankton functional groups and traits responded to resource variation, especially increasing their variety and contribution during spring and summer periods. Conclusions The functional structure of the phytoplankton community in Lake Mangueira, here accessed by functional traits and RFGs, was more conditioned by its environmental temporal variability rather than by the spatial variation, indicating that the resources and life conditions seasonal variation strongly influence the phytoplankton in this ecosystem.
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- 2018
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4. Microplastic Concentrations in Raw and Drinking Water in the Sinos River, Southern Brazil
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Marlon Ferraz, Amanda Leticia Bauer, Victor Hugo Valiati, and Uwe Horst Schulz
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contamination ,water treatment ,fibers ,water management ,Hydraulic engineering ,TC1-978 ,Water supply for domestic and industrial purposes ,TD201-500 - Abstract
Microplastics are omnipresent in the atmosphere, terrestrial and aquatic ecosystems, food and beverages. They may cause risks to biodiversity and the human population. The present study aims to assess the concentrations of microplastics in raw and drinking water of the Sinos River in Southern Brazil. The water was collected at eight locations along the Sinos River and in eight residences supplied with treated river water. The samples were processed by dying plastic particles with Nile Red and counting by fluorescence microscopy. River water showed an average of 330.2 particles L−1 and treated water 105.8 particles L−1. Fibers were the most abundant particles shapes in the samples. Particle abundance in the raw water did not follow the urbanization gradient in the Sinos River basin. The exact pathways of microplastic particles remain unidentified, but the predominance of fibers suggests that untreated sewage from washing machines may be a principal source of contamination, particularly in the headwaters. The microplastic in the drinking water is an additional factor to be considered in conservation efforts aiming at improving water quality in the Sinos River basin.
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- 2020
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5. First record of partial albinism in two catfish species of Genidens (Siluriformes: Ariidae) in an estuary of Southern Brazil
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Mateus Evangelista Leal, Uwe Horst Schulz, Pablo Lehmann Albornoz, Rodrigo Machado, and Paulo Henrique Ott
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Estuarine fishes ,Genidens barbus ,Genidens planifrons ,leucism ,Biotechnology ,TP248.13-248.65 - Abstract
This study reports the first occurrence of partial albinism in two species of Ariidae: Genidens barbus and Genidens planifrons from an estuary of Southern Brazil. Possible causes of the simultaneous occurrence of three specimens with partial albinism are discussed, including random genetic alterations, chronic contamination effects and small effective population size, which may favor the expression of the recessive albino gene.
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- 2013
6. Marking small tropical fish with Visual Implant Fluorescent Elastomer (VIFE)
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Amanda Saldanha Barbosa, Mateus Evangelista Leal, and Uwe Horst Schulz
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Bryconamericus iheringii ,Fragmentation ,Mortality ,Retention ,Rineloricaria malabarbai ,Science ,Biology (General) ,QH301-705.5 - Abstract
Several fish-marking techniques are used to diagnose the population dynamics of species. However, marks should not interfere with behavior, growth and reproduction of the involved population. For this reason, VIFE (Visible Implant Fluorescent Elastomer) was developed. This study reports the use of VIFE to mark two small tropical species, Bryconamericus iheringii and Rineloricaria malabarbai, in a controlled environment. We captured 30 individuals of B. iheringii and 30 of R. malabarbai by electrofishing. The fish were marked and observed for 90 days, and there was no instant mortality after inserting the elastomer. During the first 70 days there was low mortality and high retention rates, but many elastomers broke into smaller fragments. Based on the low mortality and high retention rates found in this analysis, the use of VIFE is recommended for similar studies.
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- 2012
7. Uso de Implante Visual Fluorescente de Elastômero (VIFE) na marcação de pequenos peixes de água doce tropicais
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Mateus Evangelista Leal, Amanda Saldanha Barbosa, and Uwe Horst Schulz
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Bryconamericus iheringii ,Fragmentação ,Mortalidade ,Retenção ,Rineloricaria malabarbai ,Science ,Biology (General) ,QH301-705.5 - Abstract
Algumas técnicas de marcação de peixes são utilizadas para diagnosticar aspectos da dinâmica populacional das espécies, não podendo interferir no comportamento, crescimento e reprodução da população envolvida. O presente estudo visa reportar a utilização do VIFE (Visible Implant Fluorescent Elastomer) na marcação de duas espécies de peixes de pequeno porte em ambiente controlado. O objetivo foi investigar se a mortalidade, a fragmentação e retenção da marca são indicadores da eficiência do implante. Foram marcados 60 peixes, 30 indivíduos do caracídeo Bryconamericus iheringii e 30 indivíduos do loricarídeo Rineloricaria malabarbai. Após 70 dias de experimento, os indivíduos de ambas as espécies não apresentaram crescimento e a taxa de retenção e mortalidade foi baixa. Existiu um grande numero de fragmentações devido à posição onde as marcas foram inseridas no corpo dos peixes. Após 90 dias de experimento todos os peixes morreram devido à contaminação da água. Os resultados de baixa mortalidade e retenção determinam que o uso de VIFE é recomendado.
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- 2012
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8. Effects of stocking density on dispersal behavior of Brazilian freshwater dourado (Salminus brasiliensis) in a subtropical river headwater
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Uwe Horst Schulz and Mateus Evangelista Leal
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Density dependence ,Dispersal ,Intraspecific competition ,Movements ,Zoology ,QL1-991 - Abstract
Juvenile freshwater dourados (Salminus brasiliensis Cuvier) were stocked in two batches of different size (61 and 133 individuals) with a time lag of 41 days in the headwaters of the Sinos River. A subsample of 25 fish was radio-tagged. Released juveniles displayed a density dependent dispersal pattern. During the first ten days mean covered distance of tagged batch 1 individuals (low density) was approximately 24 m d-1, while batch 2 individuals (high density) moved 296 m d-1. Activity of batch 1 fish increased after the release of batch 2 and remained high (459 m d-1) until 90 days. Activity of batch 2 fish during this period was in same range. After this period, activity levels of both batches decreased to about 60 m d-1. Increased movements in higher density condition are seen as a result of interspecific competition. The mean covered distances per day remained high until stocked individuals become established in their new habitat.Dois lotes de 61 e 133 dourados (Salminus brasiliensis Cuvier) juvenis foram introduzidos nas cabeceiras do rio dos Sinos. O intervalo entre as solturas foi de 41 dias. Uma subamostra de 25 peixes foi marcada com radiotransmissores. A dispersão dos indivíduos após soltura mostrou um padrão dependente da densidade. Durante os primeiros dez dias a distância média dos indivíduos do lote 1 (densidade baixa) foi de 24 m d-1, enquanto os indivíduos do lote 2 (densidade alta) percorreram em média 296 m d-1. A atividade dos peixes do lote 1 aumentou depois da soltura do lote 2 e permaneceu alta (459 m d-1) durante 90 dias. A atividade dos indivíduos do lote 2 ficou no mesmo nível durante este período. Depois os movimentos de ambos os lotes diminuíram até uma média de 60 m d-1. O nível alto de movimentos na situação de maior densidade é visto como resultado da competição intraespecífica. As médias das distâncias percorridas por dia permanecem altas até os indivíduos introduzidos estabelecerem-se nos seus habitats novos.
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- 2012
9. Ritmo de alimentação de juvenis de Loricariichthys anus (Siluriformes, Loricariidae) da Lagoa dos Quadros, RS, Brasil Feeding activity of juveniles of Loricariichthys anus (Siluriformes, Loricariidae) in the Quadros Lake, RS, Brasil
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Ana Cristina Petry and Uwe Horst Schulz
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Loricariichthys anus ,juvenile ,feeding rhythm ,intestinal quotient ,Zoology ,QL1-991 - Abstract
The rhythm of movements and feeding activity of juveniles of Loricariichthys anus (Valenciennes, 1840) in the Quadros lake, South Brazil, are investigated. Between October 1997 and August 1998, 236 specimens were captured during six bimonthly 24 hour gillnet surveys. Significantly elevated levels of movement and feeding activity during the day are registered. The patterns of movement and feeding activity displayed no significant difference, suggesting that high movement activity levels can be attributed to feeding activity. The mean of the intestinal quotient was 1,89, indicating omnivorous feeding habits.
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- 2000
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10. Effects of stocking density on dispersal behavior of Brazilian freshwater dourado (Salminus brasiliensis) in a subtropical river headwater
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Uwe Horst Schulz and Mateus Evangelista Leal
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Density dependence ,Dispersal ,Intraspecific competition ,Movements ,Zoology ,QL1-991 - Abstract
Juvenile freshwater dourados (Salminus brasiliensis Cuvier) were stocked in two batches of different size (61 and 133 individuals) with a time lag of 41 days in the headwaters of the Sinos River. A subsample of 25 fish was radio-tagged. Released juveniles displayed a density dependent dispersal pattern. During the first ten days mean covered distance of tagged batch 1 individuals (low density) was approximately 24 m d-1, while batch 2 individuals (high density) moved 296 m d-1. Activity of batch 1 fish increased after the release of batch 2 and remained high (459 m d-1) until 90 days. Activity of batch 2 fish during this period was in same range. After this period, activity levels of both batches decreased to about 60 m d-1. Increased movements in higher density condition are seen as a result of interspecific competition. The mean covered distances per day remained high until stocked individuals become established in their new habitat.
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11. Life in the Caribbean: age and growth of common bottlenose dolphinsTursiops truncatusin Cuban waters
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Greicy F. Ruenes, Ronar López, Maíra Laeta, Danilo Cruz, Liena Sanchez‐Martinez, Laima Sanchez‐Campo, Uwe Horst Schulz, Celia G. March, Aleta A. Hohn, and Larissa R. Oliveira
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Aquatic Science ,Ecology, Evolution, Behavior and Systematics - Published
- 2023
12. Neotropical freshwater fisheries : A dataset of occurrence and abundance of freshwater fishes in the Neotropics
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Lívia Helena Tonella, Renata Ruaro, Vanessa Salete Daga, Diego Azevedo Zoccal Garcia, Oscar Barroso Vitorino, Tatiana Lobato‐de Magalhães, Roberto Esser dos Reis, Fabio Di Dario, Ana Cristina Petry, Michael Maia Mincarone, Luciano Fogaça de Assis Montag, Paulo Santos Pompeu, Adonias Aphoena Martins Teixeira, Alberto Luciano Carmassi, Alberto J. Sánchez, Alejandro Giraldo Pérez, Alessandra Bono, Aléssio Datovo, Alexander S. Flecker, Alexandra Sanches, Alexandre Lima Godinho, Alexandre Matthiensen, Alexandre Peressin, Alexandre Wagner Silva Hilsdorf, Alexéia Barufatti, Alice Hirschmann, Aline Jung, Allan K. Cruz‐Ramírez, Alline Braga Silva, Almir Manoel Cunico, Amanda Saldanha Barbosa, Amauri de Castro Barradas, Ana Carolina Lacerda Rêgo, Ana Clara Sampaio Franco, Ana Paula Lula Costa, Ana Paula Vidotto‐Magnoni, Anderson Ferreira, Anderson Kassner Filho, André Batista Nobile, André Lincoln Barroso Magalhães, André Teixeira da Silva, Andréa Bialetzki, Andréa Cristina dos Santos Maroclo Gomes, Andrezza Bellotto Nobre, Armando Cesar Rodrigues Casimiro, Arturo Angulo Sibaja, Arthur Alexandre Capelli dos Santos, Átila Rodrigues de Araújo, Augusto Frota, Bárbara Angélio Quirino, Beatriz Moreira Ferreira, Bianca Weiss Albuquerque, Bruna Arbo Meneses, Brunno Tolentino Oliveira, Bruno Augusto Torres Parahyba Campos, Bruno Bastos Gonçalves, Bruno Busnello Kubiak, Bruno da Silveira Prudente, Bruno Gorini de Araujo Passos Pacheco, Bruno Kazuo Nakagawa, Bruno Tayar Marinho do Nascimento, Calebe Maia, Camila Cantagallo Devids, Carla Ferreira Rezende, Carla Muñoz‐Mendoza, Carlos A. Peres, Carlos Alberto de Sousa Rodrigues Filho, Carlos Alberto Santos de Lucena, Carlos Alexandre Fernandes, Carlos Benhur Kasper, Carlos Donascimiento, Carmino Emidio, Carolina Carrillo‐Moreno, Carolina Machado, Carolina Pera, Caroline Hartmann, Catherine M. Pringle, Cecília Gontijo Leal, Céline Jézéquel, Chris Harrod, Clarissa Alves da Rosa, Claudio Quezada‐Romegialli, Crisla Maciel Pott, Crislei Larentis, Cristiane A. S. Nascimento, Cristina da Silva Gonçalves, Cristina Jaques da Cunha, Cristina Moreira Pisicchio, Daniel Cardoso de Carvalho, Daniel Galiano, Daniel Gomez‐Uchida, Daniel Oliveira Santana, Daniel Salas Johnson, Danielle Katharine Petsch, Danielly Torres Hashiguti de Freitas, Dayani Bailly, Débora Ferreira Machado, Débora Reis de Carvalho, Dhyego Hamilton Topan, Diego Cañas‐Rojas, Diego da Silva, Diogo Freitas‐Souza, Dilermando Pereira Lima‐Júnior, Diovani Piscor, Djalma Pereira Moraes, Douglas Viana, Dyego Leonardo Ferraz Caetano, Éder André Gubiani, Edson K. Okada, Eduardo Cazuni do Amaral, Eduardo Meneguzzi Brambilla, Eduardo Ribeiro Cunha, Elaine Antoniassi Luiz Kashiwaqui, Elise Amador Rocha, Elisete Ana Barp, Elmary da Costa Fraga, Elvira D'Bastiani, Eugenia Zandonà, Eurizângela Pereira Dary, Evanilde Benedito, Everardo Barba‐Macías, Evelyn Vanessa Calvache Uvidia, Fabiana Luques Fonseca, Fabiane Silva Ferreira, Fábio Lima, Fábio Maffei, Fábio Porto‐Foresti, Fabrício Barreto Teresa, Fabrício de Andrade Frehse, Fagner Júnior M. Oliveira, Felipe Pessoa da Silva, Felipe Pontieri de Lima, Fernanda Dotti do Prado, Fernando Camargo Jerep, Fernando Emmanuel Gonçalves Vieira, Fernando Gertum Becker, Fernando Rogério de Carvalho, Flávio Kulaif Ubaid, Francisco Keilo Teixeira, Francisco Provenzano Rizzi, Francisco Severo‐Neto, Francisco Villamarín, Franco Teixeira de Mello, Friedrich Wolfgang Keppeler, Gabriel de Avila Batista, Gabriel de Menezes Yazbeck, Giancarlo Tesitore, Gilberto Nepomuceno Salvador, Gita Juan Soteroruda Brito, Giulianna Rondineli Carmassi, Gregório Kurchevski, Guillermo Goyenola, Hasley Rodrigo Pereira, Helen Jamille Fernandes Silva Alvez, Helena Alves do Prado, Henrique Ledo Lopes Pinho, Híngara Leão Sousa, Hugo Bornatowski, Hugo de Oliveira Barbosa, Ibon Tobes, Igor de Paiva Affonso, Igor Raposo Queiroz, Irma Vila, Iván Vinicio Jácome Negrete, Ivo Gavião Prado, Jean Ricardo Simões Vitule, Jessé Figueiredo‐Filho, Jessica Antúnez Gonzalez, Jéssica Caroline de Faria Falcão, Jéssica Vieira Teixeira, Jimmy Pincheira‐Ulbrich, Jislaine Cristina da Silva, João Antonio de Araujo Filho, João Fernando Marques da Silva, João Gabriel Genova, João Gabriel Ribeiro Giovanelli, João Vitor Perin Andriola, Jonatas Alves, Jonathan Valdiviezo‐Rivera, Jorge Brito, Jorge Iván Sánchez Botero, Jorge Liotta, Jorge Luis Ramirez, Jorge Reppold Marinho, José Luís Olivan Birindelli, Jose Luis Costa Novaes, Joseph E. Hawes, Josiane Ribolli, Juan Francisco Rivadeneira, Juan Jacobo Schmitter‐Soto, Juliana Camara Assis, Juliana Paulo da Silva, Juliana Silveira dos Santos, Juliana Wingert, Juliana Wojciechowski, Juliano André Bogoni, Juliano Ferrer, Julio César Jut Solórzano, Júlio César Sá‐Oliveira, Jussara Oliveira Vaini, Kamila Contreras Palma, Karine Orlandi Bonato, Karla Dayane de Lima Pereira, Kassiano dos Santos Sousa, Kevin Giancarlo Borja‐Acosta, Laís Carneiro, Larissa Faria, Leonardo Brito de Oliveira, Leonardo Cardoso Resende, Leonardo Ferreira da Silva Ingenito, Leonardo Oliveira Silva, Leydiane Nunes Rodrigues, Lida Guarderas‐Flores, Lidiane Martins, Lorena Tonini, Lorrana Thaís Máximo Durville Braga, Louise Cristina Gomes, Lucas de Fries, Lucas Gonçalves da Silva, Lucas Ribeiro Jarduli, Luciano Benedito Lima, Luciano Gomes Fischer, Luciano Lazzarini Wolff, Luciano Neves dos Santos, Luis Artur Valões Bezerra, Luisa Maria Sarmento Soares, Luisa Resende Manna, Luiz Fernando Duboc, Luiz Guilherme dos Santos Ribas, Luiz Roberto Malabarba, Marcelo Fulgêncio Guedes Brito, Marcelo Rennó Braga, Marcelo Silva de Almeida, Maria Cecília Sily, Maria Claudene Barros, Maria Histelle Sousa do Nascimento, Maria Laura de Souza Delapieve, Maria Teresa Fernandez Piedade, Marina Tagliaferro, Mário Cesar Cardoso de Pinna, Mario H. Yánez‐Muñoz, Mário Luís Orsi, Marlon Ferraz da Rosa, Marlos Bastiani, Marta Severino Stefani, Martha Buenaño‐Carriel, Martha Elena Valdez Moreno, Mateus Moreira de Carvalho, Mateus Tavares Kütter, Matheus Oliveira Freitas, Mauricio Cañas‐Merino, Mauricio Cetra, Mauricio Herrera‐Madrid, Mauricio Mello Petrucio, Mauro Galetti, Miguel Ángel Salcedo, Miguel Pascual, Milton Cezar Ribeiro, Milza Celi Fedatto Abelha, Mônica Andrade da Silva, Mônica Pacheco de Araujo, Murilo Sversut Dias, Naiara Guimaraes Sales, Naraiana Loureiro Benone, Natane Sartor, Nelson Ferreira Fontoura, Nicholas Silvestre de Souza Trigueiro, Nicolás Álvarez‐Pliego, Oscar Akio Shibatta, Pablo A. Tedesco, Pablo Cesar Lehmann Albornoz, Pablo Henrique Fernandes Santos, Pâmela Virgolino Freitas, Patricia Calegari Fagundes, Patrícia Domingues de Freitas, Patricio Mena‐Valenzuela, Paul Tufiño, Paula Araujo Catelani, Paula Peixoto, Paulo Ilha, Pedro De Podestà Uchôa de Aquino, Pedro Gerhard, Pedro Hollanda Carvalho, Pedro Jiménez‐Prado, Pedro Manoel Galetti, Pedro Paulino Borges, Pedro Peixoto Nitschke, Pedro Sartori Manoel, Phamela Bernardes Perônico, Philip Teles Soares, Pitágoras Augusto Piana, Priscila de Oliveira Cunha, Priscila Plesley, Rafael Couto Rosa de Souza, Rafael Rogério Rosa, Rana W. El‐Sabaawi, Raoni Rosa Rodrigues, Raphael Covain, Raquel Coelho Loures, Raul Rennó Braga, Reginaldo Ré, Rémy Bigorne, Renata Cassemiro Biagioni, Renato Azevedo Matias Silvano, Renato Bolson Dala‐Corte, Renato Tavares Martins, Ricardo Rosa, Ricardo Sartorello, Rodrigo de Almeida Nobre, Ronald D. Bassar, Ronaldo César Gurgel‐Lourenço, Ronaldo Fernando Martins Pinheiro, Ronaldo Leal Carneiro, Rosa Florido, Rosana Mazzoni, Rosane Silva‐Santos, Rosiane de Paula Santos, Rosilene Luciana Delariva, Sandra Maria Hartz, Sebastien Brosse, Sérgio Luiz Althoff, Shaka Nóbrega Marinho Furtado, Sidnei Eduardo Lima‐Junior, Silvia Yasmin Lustosa Costa, Solange Arrolho, Sonya K. Auer, Sybelle Bellay, Taís de Fátima Ramos Guimarães, Talitha Mayumi Francisco, Tatiane Mantovano, Tatyana Gomes, Telton Pedro Anselmo Ramos, Thaís de Assis Volpi, Thais Moura Emiliano, Thiago Augusto Pedroso Barbosa, Thiago José Balbi, Thiago Nascimento da Silva Campos, Thiago Teixeira Silva, Thiago Vinícius Trento Occhi, Thiely Oliveira Garcia, Tiago Magalhães da Silva Freitas, Tiago Octavio Begot, Tony Leandro Rezende da Silveira, Ueslei Lopes, Uwe Horst Schulz, Valéria Fagundes, Valéria Flávia Batista da Silva, Valter M. Azevedo‐Santos, Vanessa Ribeiro, Vanessa Graciele Tibúrcio, Vera Lúcia Lescano de Almeida, Victoria J. Isaac‐Nahum, Vinicius Abilhoa, Vinicius Farias Campos, Vinicius Tavares Kütter, Vivian de Mello Cionek, Viviane Prodocimo, Wagner Vicentin, Waldney Pereira Martins, Walna Micaelle de Moraes Pires, Weferson Júnio da Graça, Welber Senteio Smith, Wesley Dáttilo, Windsor Efren Aguirre Maldonado, Yuri Gomes Ponce de Carvalho Rocha, Yzel Rondon Súarez, and Zilda Margarete Seixas de Lucena
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biodiversity hotspot ,ichthyology ,Landschapsarchitectuur en Ruimtelijke Planning ,Landscape Architecture and Spatial Planning ,conservation ,species distribution ,Neotropical region ,occurrence ,Ecology, Evolution, Behavior and Systematics ,data paper - Abstract
The Neotropical region hosts 4225 freshwater fish species, ranking first among the world's most diverse regions for freshwater fishes. Our NEOTROPICAL FRESHWATER FISHES data set is the first to produce a large-scale Neotropical freshwater fish inventory, covering the entire Neotropical region from Mexico and the Caribbean in the north to the southern limits in Argentina, Paraguay, Chile, and Uruguay. We compiled 185,787 distribution records, with unique georeferenced coordinates, for the 4225 species, represented by occurrence and abundance data. The number of species for the most numerous orders are as follows: Characiformes (1289), Siluriformes (1384), Cichliformes (354), Cyprinodontiformes (245), and Gymnotiformes (135). The most recorded species was the characid Astyanax fasciatus (4696 records). We registered 116,802 distribution records for native species, compared to 1802 distribution records for nonnative species. The main aim of the NEOTROPICAL FRESHWATER FISHES data set was to make these occurrence and abundance data accessible for international researchers to develop ecological and macroecological studies, from local to regional scales, with focal fish species, families, or orders. We anticipate that the NEOTROPICAL FRESHWATER FISHES data set will be valuable for studies on a wide range of ecological processes, such as trophic cascades, fishery pressure, the effects of habitat loss and fragmentation, and the impacts of species invasion and climate change. There are no copyright restrictions on the data, and please cite this data paper when using the data in publications.
- Published
- 2023
13. Microplastic Concentrations in Raw and Drinking Water in the Sinos River, Southern Brazil
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Amanda Leticia Bauer, Uwe Horst Schulz, Victor Hugo Valiati, and Marlon Ferraz
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Microplastics ,lcsh:Hydraulic engineering ,010504 meteorology & atmospheric sciences ,Geography, Planning and Development ,Population ,Drainage basin ,Sewage ,010501 environmental sciences ,Aquatic Science ,fibers ,01 natural sciences ,Biochemistry ,lcsh:Water supply for domestic and industrial purposes ,contamination ,lcsh:TC1-978 ,water management ,Raw water ,education ,0105 earth and related environmental sciences ,Water Science and Technology ,lcsh:TD201-500 ,education.field_of_study ,geography ,geography.geographical_feature_category ,business.industry ,Aquatic ecosystem ,water treatment ,Environmental chemistry ,Environmental science ,Water treatment ,Water quality ,business - Abstract
Microplastics are omnipresent in the atmosphere, terrestrial and aquatic ecosystems, food and beverages. They may cause risks to biodiversity and the human population. The present study aims to assess the concentrations of microplastics in raw and drinking water of the Sinos River in Southern Brazil. The water was collected at eight locations along the Sinos River and in eight residences supplied with treated river water. The samples were processed by dying plastic particles with Nile Red and counting by fluorescence microscopy. River water showed an average of 330.2 particles L&minus, 1 and treated water 105.8 particles L&minus, 1. Fibers were the most abundant particles shapes in the samples. Particle abundance in the raw water did not follow the urbanization gradient in the Sinos River basin. The exact pathways of microplastic particles remain unidentified, but the predominance of fibers suggests that untreated sewage from washing machines may be a principal source of contamination, particularly in the headwaters. The microplastic in the drinking water is an additional factor to be considered in conservation efforts aiming at improving water quality in the Sinos River basin.
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- 2020
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14. Quantifying shedding of microplastic fibers from textile washing
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Hudini Chiaramont Maciel, Marcelo Oliveira Caetano, Uwe Horst Schulz, and Amanda Gonçalves Kieling
- Subjects
General Earth and Planetary Sciences ,General Environmental Science - Abstract
Fiber fragments from synthetic textile materials are a subgroup of microplastics, and the presence of this debris in the environment may have its origin from some different sources. In order to investigate the formation of these residues during domestic washing, washings were simulated on samples of textile articles consisting of three different synthetic materials (polyamide, acrylic, and polyester). The effluent generated was collected and filtered, retaining the microplastic fibers shed. Through a gravimetric process, the mass of particles adhered to the filters was determined, and with the use of a fluorescent dye (Nile Red), these particles were quantified under a fluorescence microscope. This study concluded that the different textile compositions shed microplastic fibers during five washing cycles. Acrylic samples shed the highest mass value (40.9 mg) and polyamide samples shed the lowest value (7.5 mg). It has been estimated that an acrylic blouse can shed 726 mg of microplastic fibers in a single washing. Regarding the size of these particles, dimensions ranging from 11µm to 3mm were observed. Visualization in a 1.2μm filter also suggests the existence of particles in nano-dimensions. In general, it was possible to establish that the domestic washing of textile articles highly contributes to the insertion of these pollutants into the water environment. From a national perspective, approximately 13,800 tons of synthetic fibers can be released into water resources annually from washing clothes.
- Published
- 2022
15. CAN THE PHYSICOCHEMICAL CHARACTERISTICS OF THE SOIL OF THE COASTAL PLAIN OF THE BRAZILIAN STATE OF RS INTERFERE IN THE NUTRITIONAL VALUE OF PUITA INTA CL RICE?
- Author
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Jeremias Pakulski Panizzon, Denise Dumoncel Righetto Ziegler, Uwe Horst Schulz, Renata Cristina de Souza Ramos, Neiva Knaak, and Lidia Mariana Fiuza
- Subjects
geography ,geography.geographical_feature_category ,Coastal plain ,Environmental science ,Forestry ,Value (mathematics) - Published
- 2019
16. Temporal variability determines phytoplankton structure over spatial organization in a large shallow heterogeneous subtropical lake
- Author
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Lacina Maria Freitas-Teixeira, Juliana Elisa Bohnenberger, David da Motta-Marques, Uwe Horst Schulz, Luciane Oliveira Crossetti, and Lúcia Ribeiro Rodrigues
- Subjects
0106 biological sciences ,Abiotic component ,Biomass (ecology) ,Ecology ,010604 marine biology & hydrobiology ,Pelagic zone ,Aquatic Science ,010603 evolutionary biology ,01 natural sciences ,Spatial heterogeneity ,Oceanography ,Habitat ,Phytoplankton ,Littoral zone ,Environmental science ,Species richness ,Water Science and Technology - Abstract
Spatial heterogeneity is associated with the temporal variability of the habitat and may affect the structural patterns of biological communities. This study evaluated the influence of spatial and temporal heterogeneity on the phytoplankton structure in a large shallow subtropical lake, Lake Mangueira in southern Brazil (Z max = 6 m; length = 90 km; width = 3–10 km). The lake is continuous warm polymictic, oligo-mesotrophic, under the direct influence of an adjacent wetland on the north, and has extensive aquatic macrophyte beds. Samples for abiotic and biological analyses were taken quarterly for 2 years at 19 points at the water subsurface, comprising the pelagic and littoral zones and the southern, central, and northern areas of the lake. The phytoplankton structure was analyzed with measurements of chlorophyll a , biomass, richness, diversity, and descriptor species. Of the 117 phytoplankton species identified, Cyanobacteria (e.g., Chroococcus limneticus , Aphanocapsa conferta , Aphanothece smithii , and Planktolyngbya contorta ) was the major group in all areas and both zones of the lake. Total biomass levels were highest in the northern area, whereas the richness and the descriptor species showed no clear spatial differences. A redundancy analysis (RDA) indicated strong temporal organization of the species according to the abiotic conditions, indicating that the high level of temporal variability due to local hydrodynamics was the main factor structuring the phytoplankton community in Lake Mangueira during the study period.
- Published
- 2016
17. Migração de peixes neotropicais em rio com barramentos sucessivos
- Author
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Thiago Cotta Ribeiro, Alexandre Lima Godinho, Daniel Cardoso de Carvalho, Hugo Pereira Godinho, Lisiane Hahn, and Uwe Horst Schulz
- Subjects
Conservação e Manejo da Vida Silvestre ,Ecologia - Abstract
A quebra da conexão entre habitats essenciais por barragens e reservatórios reduz a abundância e diversidade de peixes migradores. Para conter esse declínio, passagens para peixes foram desenvolvidas em diversas regis do mundo incluindo o Brasil. O curimbatá Prochilodus lineatus, objeto desse estudo, com ampla distribuição na América do Sul é o potamódromo neotropical mais estudado. Com o uso da radiotelemetria, associada à coletas de ovos, larvas e alevinos, novo e atualizado modelo conceitual é proposto para o comportamento migratório de curimbatás no trecho do rio Grande que compreende as barragens de Marimbondo, Porto Colômbia, Volta Grande, Igarapava e Jaguara. Também são testadas cinco hipóteses: (h1) que a implementação de passagens para peixes nas barragens de Porto Colômbia e Volta Grande não cumprirá as precondições para que funcionem como armadilhas ecológicas; (h2) peixes artificialmente transpostos migram com maior probabilidade que os soltos no sopé das barragens; (h3) peixes soltos no reservatório mostram comportamento direcionado para montante e não se perdem dentro do reservatório; (h4) peixes soltos no reservatório podem usar tributários que são sítios de reprodução e (h5) peixes após se deslocarem para montante são capazes de retornar através do reservatório e transpor a barragem em direção para jusante. O novo modelo conceitual mostra que peixes utilizam os tributários Carmo (a montante de Volta Grande), SapucaíPaulista (a montante de Porto Colômbia) e Pardo-Mogi-Guaçu (a jusante de Porto Colômbia) como sítios reprodutivos. Também que o acúmulo de peixes sedentários ao sopé das barragens estudadas é notório. Os resultados indicam que a teoria de armadilhas ecológicas não se aplica ao caso das barragens de Porto Colômbia e Volta Grande, pois, as precondições: migração unidirecional e habitats a montante da barragem de baixa qualidade para reprodução e desenvolvimento dos alevinos, não se aplicam ao trecho estudado no rio Grande. Dados mostram que peixes são capazes de atravessar grandes reservatórios como os de Porto Colômbia e Volta Grande através em movimentos migratórios descendentes. Além de serem capazes de transpor as barragens e continuar sua migração para a jusante. Os dados também confirmam a atividade reprodutiva e presença de berçários naturais da espécie a montante de ambas barragens. Concluo a partir desses resultados que a construção de passagens para peixes nas barragens de Porto Colômbia e Volta Grande poderá auxiliar na conservação e promover o aumento da abundância do curimbatá na região.
- Published
- 2013
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