Consulta: subjectFacets:"Stream ecology"
Registros recuperados: 6
Data/hora: 12/06/2024 15:34:45

Long-term fish community response to a reach-scale stream restoration
Provedor de dados: 7
Autores: Shirey, Patrick D.; University of Notre Dame, Department of Biological Sciences; Ecology Policy LLC; patrickdshirey@gmail.com; Brueseke, Michael A.; University of Notre Dame, Department of Biological Sciences; mbruesek@nd.edu; Kenny, Jillian B.; University of Notre Dame, Department of Biological Sciences; World Resources Institute; jkenny0803@gmail.com; Lamberti, Gary A.; University of Notre Dame, Department of Biological Sciences; glambert@nd.edu.
At a global scale, aquatic ecosystems are being altered by human activities at a greater rate than at any other time in history. In recent years, grassroots efforts have generated interest in the restoration of degraded or destroyed aquatic habitats, especially small wetlands and streams where such projects are feasible with local resources. We present ecological management lessons learned from 17 years of monitoring the fish community response to the channel relocation and reach-level restoration of Juday Creek, a 3rd-order tributary of the St. Joseph River in Indiana, USA. The project was designed to increase habitat complexity, reverse the effects of accumulated fine sediment (&amp;#60; 2 mm diameter), and mitigate for the impacts of a new golf course...
Tipo: Peer-Reviewed Reports
Palavras-chave: Conservation; Fisheries; Long-term monitoring; Restoration planning; Stream ecology.
Ano: 2016

Environmental assessment in tropical streams by using abundance-biomass curves and W index in fish assemblages
Provedor de dados: 76
Autores: Mise,Fábio T.; Message,Hugo J.; Pagotto,João P. A.; Goulart,Erivelto.
ABSTRACT We investigated the fish fauna response to different environmental conditions of urban (three) and rural (seven) streams through biomass/abundance curves and W index of environmental stress. Negative values of W indicate some level of stress, while positive values suggest environments with lower stress. Dissolved oxygen, marginal erosion (both left and right margins), mesohabitat diversity, and percentage of canopy cover were measured to characterize the 10 streams analysed around Maringá city, Southern Brazil. Fish were sampled by electrofishing, then identified and weighed. Results showed negative values of W to the urban streams and positive to the rural. Urban streams showed a tendency to have assemblages of fish with lower biomass and greater...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Neotropical region; Biotic indices; Stream ecology; Biodiversity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212018000100229

Occurrence of phoresy between Ancistrus multispinis (Actinopterygii: Siluriformes) and Ichthyocladius sp. (Diptera: Chironomidae) in Atlantic forest streams, Southeastern Brazil
Provedor de dados: 103
Autores: Mattos,Tailan Moretti; Carvalho,Dandhara Rossi; Brito,Mateus Santos de; Araújo,Francisco Gerson.
ABSTRACT Phoretic relationships often bring large advantages to epibionts. By attaching themselves to mobile hosts, epibionts are able to: expand their ranges without spending energy, reduce their risk of being predated, and increase their probability of finding food. We assessed the phoretic relationship between the siluriform fish Ancistrus multispinis (Regan, 1912) and the chironomid larva Ichthyocladius sp. in three streams of the Atlantic forest in southeastern Brazil. We evaluated changes in epibiont distribution throughout the body regions of the host and among three different aquatic systems. We had predicted that certain body regions are more prone to support epibiont attachment, and that epibiont prevalence increases with increased host size and...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Commensalism; Larval dispersion; Midges; Stream ecology.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702018000100503

Aspectos da reprodução e alimentação de Neoplecostomus microps (Loricariidae, Neoplecostominae) na microbacia do Ribeirão Grande, serra da Mantiqueira oriental (Estado de São Paulo) - DOI: 10.4025/actascibiolsci.v30i4.301
Provedor de dados: 3
Autores: Braga, Francisco Manoel de Souza; Unesp/Rio Claro; Gomiero, Leandro Muller; UNESP/Rio Claro; Souza, Ursulla Pereira; UNESP/Rio Claro.
A microbacia do Ribeirão Grande situa-se nas vertentes da serra da Mantiqueira e está circundada pela floresta Atlântica. Foram amostrados oito locais na microbacia do Ribeirão Grande, no inverno (julho de 2001), primavera (outubro de 2001), verão (fevereiro de 2002) e outono (abril de 2002). As amostras foram coletadas com um aparelho elétrico de pesca. A maturação das gônadas, os graus de repleção do estômago e de gordura visceral foram distribuídas em um ciclo anual. Neoplecostomus micropstem período de desova que vai da primavera ao verão. O tamanho da primeira maturação gonadal para machos foi de 5,9 cm de comprimento total e de 6,9 cm para as fêmeas. O alto valor em outubro e fevereiro para a relação gonadossomática e para o fator de condição...
Palavras-chave: 2.04.00.00-4    Zoologia Neoplecostomus microps; Reprodução; Alimentação; Ecologia de riacho Neoplecostomus microps; Life cycle; Feeding habit; Stream ecology.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/301

The fish fauna of the Jacaré-Guaçu River basin, Upper Paraná River basin
Provedor de dados: 49
Autores: Esguícero,André Luiz Henríques; Arcifa,Marlene Sofia.
This study aimed to evaluate the fish fauna composition and distribution in different environments, up- and downstream the Gavião Peixoto Dam, in the Jacaré-Guaçu River basin. Most of the sampled ichthyofauna is autochthonous, and the majority of the species belongs to the orders Characiformes and Siluriformes. The order Characiformes comprised most of the specimens caught, Astyanax altiparanae being the most abundant species. All the studied environments were characterized by the massive occurrence of accidental species and low similarity between their ichthyofauna. In general, a greater number of species and higher values of the diversity index were observed downstream of the dam. The fish diversity in the studied habitats was positively correlated with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Neotropical fishes; Stream ecology; Communities' structure; Freshwater fishes; Environmental degradation.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000100010

Temporal and spatial distribution of the ichthyofauna in two streams of the upper Rio Paraná basin
Provedor de dados: 52
Autores: Pavanelli,Carla Simone; Caramaschi,Érica Pellegrini.
The temporal and spatial distribution of the ichthyofauna was assessed in two streams, Caracu and São Pedro, affluents of the Rio Paraná, from March 1991 through February 1992. Samples were taken along the streams, using sieves (three sites on the Caracu and two on the São Pedro), and gill nets (two sites on the São Pedro). A total of 6,664 specimens belonging to 71 species were captured. CPE was calculated for each fishing gear. The data for cumulative frequency indicated that only the mouths of streams did not reach an asymptote. Constancy analysis showed that occasional and accessory species predominated. The spectrum of spatial diversity indicated that diversity increased toward the mouth of streams and temporal diversity increased in the high water...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Community structure; Freshwater fishes; Stream ecology.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000200019