Fishes Population
Mostrando 1-12 de 62 artigos, teses e dissertações.
-
1. Fish metacommunity structure in Caño Maraca, an important nursery habitat in the Western Llanos of Venezuela
ABSTRACT We investigated spatial and seasonal variation of fish assemblages of Caño Maraca, a creek in Venezuela’s Western Llanos, a region with strong wet-dry seasonality. Fishes were surveyed over a 19-year period at three sites along the longitudinal gradient: a headwater site with a narrow channel, a middle site with shallow channels traversing a seas
Neotrop. ichthyol.. Publicado em: 06/12/2018
-
2. Biology of Boeckella poopoensis Marsh, 1906 (Copepoda, Calanoida) in natural conditions in temporary saline lakes of the central Argentina
Boeckella poopoensis Marsh, 1906 is the dominant copepod in saline lakes from northern Patagonia to southern Peru. It is a tolerant species, which has been registered at salinities between 20 and 90 g.L-1, and is important because it integrates the diet of flamingos and fishes of commercial and sport interest. The aims of this study were to analyze the chara
Biota Neotrop.. Publicado em: 29/04/2016
-
3. The effect of structural enrichment in hatchery tanks on the morphology of two neotropical fish species
Reared fish differ from wild fish in several aspects, including morphology, because they are adapted to captive conditions that are totally different from natural conditions. To minimize the influence of the hatchery environment on the morphology of fish, the use of environmental enrichment through the incorporation of natural designs in captivity, has been
Neotrop. ichthyol.. Publicado em: 02/12/2014
-
4. Gram-negative intestinal indigenous microbiota from two Siluriform fishes in a tropical reservoir
The Gram-negative intestinal microbiota of Hypostomus auroguttatus and Pimelodus maculatus, a detritivorous and an omnivorous fish species, respectively, were compared between fishes from the reservoir and the stretch of the river below the dam of the Funil hydroelectric plant, Rio de Janeiro, Brazil. Four selective culture media were used under aerobic and
Braz. J. Microbiol.. Publicado em: 2014-12
-
5. Desenvolvimento de um sistema de recirculação com uso de wetlands construídas para efluentes da piscicultura / Development of a recirculating system using constructed wetlands for aquaculture effluents
Global aquaculture has been growing very fast in recent decades due to several factors, including: population growth, demand for low calorie protein and especially the reduction of natural fish stocks. Brazil has enormous potential to become a world leader in fisheries production in captivity. However, the development of aquaculture in Brazil must be conduct
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/06/2012
-
6. Estimates of population parameters and consumption/biomass ratio for fishes in reservoirs, Paraná State, Brazil
O consumo, a mortalidade natural e as estimativas de crescimento são parâmetros importantes para a construção de modelos pesqueiros e ecossistêmicos. Dessa forma, neste trabalho foram calculados os parâmetros k (constante de crescimento da equação de von Bertalanffy), Loo (comprimento assintótico), Woo (peso assintótico), Ar (índice da nadadeira c
Neotropical Ichthyology. Publicado em: 2012
-
7. Ecologia populacional do bagre cego de Iporanga, Pimelodella kronei (Siluriformes: Heptateridae), do Vale do Alto Ribeira, Iporanga - SP: uma comparação com Trajano, 1987 / Population ecology of blind catfish from Iporanga, Pimelodella kronei (Siluriformes, Heptapteridae) in the Upper Ribeira Valley, Iporanga-SP: a comparison with Trajano, 1987
O bagre cego de Iporanga, Pimelodella kronei, da região do Parque Estadual Turístico do Alto Ribeira-PETAR, SP, foi o primeiro peixe troglóbio descoberto e descrito no Brasil e um dos mais estudados até hoje. Populações de bagres cegos atribuídas a essa espécie foram encontradas, até o momento, em cavernas do Sistema das Areias (Areias de Cima - loc
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/09/2011
-
8. Population dynamics of the migratory fish Prochilodus lineatus in a neotropical river: the relationships with river discharge, flood pulse, El Niño and fluvial megafan behaviour
The relative importance of flood pulse dynamics and megafan behaviour for the Sábalo (Prochilodus lineatus) catches in the neotropical Pilcomayo River is studied. The Sábalo catches can mainly be explained by decreased river discharges in the preceding years resulting in smaller inundated areas during rainy season floods and thereby in a decreased area of
Neotropical Ichthyology. Publicado em: 26/02/2010
-
9. Reproductive biology of a population of Gymnotus aff. carapo (Teleostei:Gymnotidae) from southern Brazil
São descritos o período reprodutivo e a relação deste com fatores bióticos e abióticos, a fecundidade absoluta e relativa, o tipo de desova, comprimento de primeira maturação e proporção sexual de Gymnotus aff. carapo de um pequeno lago no Parque Estadual de Itapuã, Rio Grande do Sul, Brazil. A espécie apresentou um período reprodutivo relativam
Publicado em: 2010
-
10. Genetic variability of two populations of Pseudoplatystoma reticulatum from the Upper Paraguay River Basin
Catfishes of the genus Pseudoplatystoma are very important species due to both their high commercial value and their ecological role as voracious predators. They undertake lengthy migratory movements during their life-cycle, this including reproductive migration which occurs from October to December in the rainy season. In the present study, seven microsatel
Genetics and Molecular Biology. Publicado em: 18/09/2009
-
11. Variabilidade genética da Dourada na Bacia do Rio Branco
Dourada is one of the largest catfishes exploited in the Amazon region. Five countries exploit this resource, which is considered, by several authors, as a unique population with seasonal migration, occurring in the whole basin, using distinct areas for reproduction, feeding and growth. Ecological or genetic data about this specie in Roraima are unknown. The
Publicado em: 2009
-
12. ProspecÃÃo do estoque de robalo-peva (Centropomus parallelus) no litoral do ParanÃ, atravÃs da pesca esportiva / Prospecting of the stock of bass-peva (Centropomus parallelus) on the Parana coast, through the sport fishing
The snooks are fishes very appreciated food item by fish consumers and recreational fishermen, for they are endowed with a high quality flesh and put up a fierce fight when captured with line-and-hook. Such characteristics make this taxon a target for a host of users, objectives and needs (commercial and recreational fishing) which, together with loss of hab
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/01/2008