Consulta: subjectFacets:"Amazon fish"
Registros recuperados: 6
Data/hora: 06/06/2024 04:24:02

Fish assemblages in two sandy beaches in lower Purus river, Amazonas, Brazil
Provedor de dados: 76
Autores: Duarte,Cleber; Py-Daniel,Lúcia H. Rapp; Deus,Cláudia Pereira de.
Fish assemblages from two sandy beaches in the lower Purus river (Amazonas, Brazil) were compared. Four sampling groups were represented by: day and night samples in sandy beach inside the Reserva Biológica de Abufari (biological reserve) and day and night samples in the Reserva de Desenvolvimento Sustentável Piagaçu-Purus (sustainable development reserve). Samples were collected during low water levels (November) in 2007. The fish were sampled by means of seines with mesh size of 5 mm between opposing knots, 11 m long and 6 m wide. A total of 112 fish species belonging to nine orders and 27 families was captured. The vast majority of the dominant forms consisted of small fishes (&lt; 100 mm SL) or juveniles. Samples collected in Abufari at night presented...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon fish; Nictemeral; Protected areas; Diversity; Abundance.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212010000400006

Histochemistry and functional organization of the dorsal skin of Ancistrus dolichopterus (Siluriformes: Loricariidae)
Provedor de dados: 83
Autores: Garg,Tarun K.; Domingos,Fabíola X. Valdez; Almeida-Val,Vera Maria F.; Val,Adalberto L.
The structural organization and histo-cytochemical features of dorsal skin of Ancistrus dolichopterus (acari bodo) are the main focus of this work. The epidermis, dermis and subcutis are the principal layers of the skin. The epidermis mainly consists of epithelial and mucous cells. Interspersed between them are lymphocytes, pigment cells, eosinophilic granular cells (EGC), and the taste buds as sensory structures. The high number of EGCs is implicated in general and specific immunological defense from pathogenic bacteria and multicellular parasites. The epithelial cells and mucous cells contain glycoproteins with oxidizable vicinal diols, carboxyl groups and O-sulphate esters and their high secretory activity is correlated with the bottom dwelling habit of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Epidermis; Skin structure; Denticle; Siluriform; Amazon fish.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000400018

Optimal feeding frequency for Heros severus (Heckel, 1840), an Amazon ornamental fish
Provedor de dados: 96
Autores: Paixão,Daércio José de Macedo Ribeiro; Brabo,Marcos Ferreira; Soares,Lourdes Marília Oliveira; Campelo,Daniel Abreu Vasconcelos; Veras,Galileu Crovatto.
ABSTRACT The influence of feeding frequency on growth performance, batch uniformity, and survival rate of severum (Heros severus) larvae and juveniles was investigated in two experiments. In the first, 200 five-day-old severum larvae with 3.20±0.31 mg and 6.20±0.39 mm were randomly distributed into 20 aquaria (1 L) and fed 500 Artemia nauplii larvae−1 day−1 for 15 days. In the second, 120 severum juveniles, 178.19±33.59 mg and 1.82±0.09 cm, were randomly distributed into 15 aquaria (300 L) and hand-fed a commercial diet (400.0 g kg−1 crude protein and 21.2 kJ g−1 gross energy) until apparent satiety for 30 days. For both experiments, feeding frequencies of one, two, three, four, and five meals day−1 were evaluated. We used four replicates for the first...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Amazon fish; Food management; Growth performance; Nutrition; Ornamental fish.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100156

Digestible tryptophan requirement for tambaqui (Colossoma macropomum) fingerlings
Provedor de dados: 124
Autores: Bomfim,Marcos Antonio Delmondes; Marchão,Rafael Silva; Ribeiro,Felipe Barbosa; Siqueira,Jefferson Costa de; Silva,Louis Ramos; Takishita,Sylvia Sanae.
ABSTRACT The objective of this study was to determine the digestible tryptophan requirement of tambaqui (Colossoma macropomum) fingerlings and its relationship with digestible lysine. A total of 300 tambaqui fingerlings with three initial weights (2.12 ± 1.19, 8.13 ± 0.75, and 15.18 ± 1.91 g) were distributed in a randomized complete block design, consisting of six treatments (0.225, 0.256, 0.288, 0.319, 0.350, and 0.381% of digestible tryptophan) and five replicates of 10 fish per plot. The tryptophan to lysine ratio was estimated using a 1.78% level of digestible lysine. Variables regarding performance, food efficiency, and body deposition of protein, fat, and ashes, and nitrogen retention efficiency were evaluated. Feed intake and nitrogen retention...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Essential amino acids; Corporal composition; Zootechnical performance; Amazon fish.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000200405

Ichthyofauna from tributaries of Urubu and Amazonas rivers, Amazonas State, Brazil
Provedor de dados: 49
Autores: Pereira,Rayane da Silva; Silva,Rayanna Graziella Amaral da; Morales,Bruno Ferezim; Souza,Sidney dos Santos; Hinnah,Rafael; Takahashi,Erico Luis Hoshiba; Ota,Rafaela Priscila.
Abstract: The Amazonas River basin comprises the world’s highest fish species diversity. Anthropogenic interferences in aquatic environments represent a pressure over the maintenance of ecological stability and biodiversity. We inventoried the ichthyofauna of 13 disturbed/modified tributaries of Urubu and Amazonas rivers in the region of the middle Amazon River, between June 2018 and March 2019. A total of 164 species were captured, represented by 11 orders, 37 families and 96 genera. Characiformes was the richest order, followed by Cichliformes and Siluriformes. The most representative families in number of species were Cichlidae, Serrasalmidae, and Characidae. Hemigrammus levis was the most abundant species, and Acarichthys heckelii the most common,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon fish; Environmental impacts; Ichthyofauna diversity; Inventory.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032020000200301

Methionine plus cystine requirements for the maintenance and efficiency of utilization with tambaqui of different body weights
Provedor de dados: 64
Autores: Porto,Neliane Galvão; Ribeiro,Felipe Barbosa; Siqueira,Jefferson Costa de; Bomfim,Marcos Antonio Delmondes; Marchão,Rafael Silva; Costa,Dayana da Conceição da.
ABSTRACT Methionine is an essential amino acid, and generally, the first limiting one in the diets of tambaqui, the main native fish produced in continental aquaculture in South America. However, there is a lack of information on their amino acid requirement, especially for maintenance and efficiency of utilization. The present study aimed to determine the requirement of [methionine plus cystine] for the maintenance and efficiency of utilization using tambaqui of different body weights. Two experiments were carried out using 250 tambaqui with weights of 100 and 300 g. They were distributed in a completely randomized design with four treatment groups (0.264, 0.396, 0.528, and 0.660% of digestible [Met + Cys]), five replications. The control treatment (CT)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sulfur amino acids; Colossoma macropomum; Factorial method; Amazon fish.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100302