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	Provedor de dados Biota Neotropica (2) BABT (1) Iheringia, Sér. Zool. (1) Neotropical Ichthyology (1) Autor Schulz,Uwe Horst (5) Leal,Mateus Evangelista (4) Albornoz,Pablo Lehmann (2) Albornoz,Pablo César Lehmann (1) Cruz,Sabrina Spindler da (1) Klein,Greice Francisco (1) Machado,Rodrigo (1) Ott,Paulo Henrique (1) Petry,Ana Cristina (1) Mais... Palavra-chave Aquaculture (1) Catfish (1) Density dependence (1) Dispersal (1) Environmental laws (1) Erythrinidae (1) Espécies invasoras (1) Estuarine fishes (1) Exotic species (1) Feeding rhythm (1) Genidens barbus (1) Genidens planifrons (1) Hoplerythrinus unitaeniatus (1) Intestinal quotient (1) Intraspecific competition (1) Introduction (1) Juvenile (1) Leucism (1) Loricariichthys anus (1) Movements (1) Mais... Tipo do documento Info:eu-repo/semantics/article (5) Ano 2013 (1) 2012 (2) 2010 (1) 2000 (1) País Brazil (5) Idioma Inglês (3) Português (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 5 Primeira ... 1 ... Última Ritmo de alimentação de juvenis de Loricariichthys anus (Siluriformes, Loricariidae) da Lagoa dos Quadros, RS, Brasil Iheringia, Sér. Zool. Petry,Ana Cristina; Schulz,Uwe Horst. 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. Tipo: Info:eu-repo/semantics/article Palavras-chave: Loricariichthys anus; Juvenile; Feeding rhythm; Intestinal quotient. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212000000200006 Effects of stocking density on dispersal behavior of Brazilian freshwater dourado (Salminus brasiliensis) in a subtropical river headwater Neotropical Ichthyology Schulz,Uwe Horst; Leal,Mateus Evangelista. 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... Tipo: Info:eu-repo/semantics/article Palavras-chave: Density dependence; Dispersal; Intraspecific competition; Movements. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000200016 Primeiro registro e aspectos ecológicos de Hoplerythrinus unitaeniatus (Agassiz, 1829) (Characiformes, Erythrinidae) como espécie introduzida na Bacia do Rio dos Sinos, RS, Brasil Biota Neotropica Leal,Mateus Evangelista; Klein,Greice Francisco; Schulz,Uwe Horst; Albornoz,Pablo Lehmann. A espécie Hoplerythrinus unitaeniatus é conhecida popularmente como jeju ou aimara. Possui ampla distribuição geográfica, ocorrendo em diversas bacias hidrográficas da América Central e do Sul, com sua localidade tipo, o Rio São Francisco. No Brasil o registro mais ao Sul da espécie é a bacia do Rio Uruguai, Rio Grande do Sul. O presente estudo reporta a primeira ocorrência de H. unitaeniatus no Sistema da Laguna dos Patos, Região Hidrográfica do Guaíba, Estado do Rio Grande do Sul, Brasil. A captura ocorreu em um banhado adjacente ao Rio dos Sinos no Município de São Leopoldo (29° 44' 14,04" S e 51° 05' 11,08" W). Dois exemplares foram coletados com redes de arrasto em maio de 2008. Um dos espécimes foi anestesiado com 2-phenoxy-ethanol, fixado em... Tipo: Info:eu-repo/semantics/article Palavras-chave: Erythrinidae; Hoplerythrinus unitaeniatus; Espécies invasoras. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032010000300002 First record of the exotic channel catfish Ictalurus punctatus (Rafinesque 1818) (Siluriformes: Ictaluridae) in the Rio dos Sinos basin, RS, Brazil Biota Neotropica Cruz,Sabrina Spindler da; Leal,Mateus Evangelista; Albornoz,Pablo César Lehmann; Schulz,Uwe Horst. The introduction of non-native species in inland waters is one of the main threats for aquatic biodiversity. Introduced species may compete for resources, prey on native fauna, spread diseases and parasites. The channel catfish Ictalurus punctatus (Siluriformes, Ictaluridae) was first described by Rafinesque 1818 in the United States and is widely distributed in North America, south Canada and north-east Mexico. This species adapts easily to new environmental conditions, is tolerant to different habitats, and is grown easily in aquaculture, which turns it into a potential invader of natural aquatic environments. The introduction of I. punctatus occurs in Brazil since 1980, and this is the first record of its occurrence in the Rio dos Sinos basin, Brazil. A... Tipo: Info:eu-repo/semantics/article Palavras-chave: Introduction; Exotic species; Aquaculture; Catfish; Environmental laws. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000300005 First record of partial albinism in two catfish species of Genidens (Siluriformes: Ariidae) in an estuary of Southern Brazil BABT Leal,Mateus Evangelista; Schulz,Uwe Horst; Albornoz,Pablo Lehmann; Machado,Rodrigo; Ott,Paulo Henrique. 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. Tipo: Info:eu-repo/semantics/article Palavras-chave: Estuarine fishes; Genidens barbus; Genidens planifrons; Leucism. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000200008 Registros recuperados: 5 Primeira ... 1 ... Última

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