Results 91 to 100 of about 1,784 (198)

Neotropical Monogenoidea. 23. Two new species of Gyrodactylus (Gyrodactylidae) from a Cichlid and an Erythrinid fish of Southeastern Brazil

Memorias do Instituto Oswaldo Cruz, 1995
Two new species of Gyrodactylus Nordmann, 1832 (Platyhelminthes, Monogenoidea) are described from fishes collected from southeastern Brazil. Gyrodactylus geophagensis n. sp.
Walter A. Boeger, Flávio Popazoglo
doaj   +1 more source

PLASTICITY OF JAW AND SKULL MORPHOLOGY IN THE NEOTROPICAL CICHLIDS GEOPHAGUS BRASILIENSIS AND G. STEINDACHNERI [PDF]

Evolution, 1991
I examined plasticity of jaw and skull morphology induced by feeding different diets in two species of the neotropical cichlid genus Geophagus. The two species possess different modes of development, which affect the size at which young begin feeding. I hypothesized that the difference in size at first feeding could lead to a difference in the amount ...
openaire   +2 more sources

Parasites in Curimata cyprinoides (Characiformes: Curimatidae) from eastern Amazon, Brazil. [PDF]

, 2017
This work is the first study on parasitic fauna of Curimata cyprinoides Linnaeus, 1766 (Curimatidae) and the host-parasite relationship. The total of 154,740 parasites such as Ichthyophthirius multifiliis (Ciliophora), trophozoite of Spironucleus sp ...
MARINHO, R. das G. B., NEVES, L. R., OLIVEIRA, M. S. B., PINHEIRO, D. A., TAVARES-DIAS, M.   +4 more
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The concentrations of heavy metals and the incidence of micronucleated erythrocytes and liver EROD activity in two edible-fish from the Paraíba do Sul river basin in Brazil | Concentração de metais pesados e incidência de eritrócitos micronucleados e atividade de EROD hepática em duas espécies de peixes comestíveis na bacia do Rio Paraíba do Sul, Brasil

Vigilância Sanitária em Debate: Sociedade, Ciência & Tecnologia, 2015
The Paraíba do Sul river (PSR) basin crosses one of the most populated and industrialized regions of Brazil and receives effluent from the metallurgic, paper mill and agricultural industries.
Thiago Estevam Martins Parente, Laísa Maria Freire dos Santos, Ana Cecília Amado Xavier de Oliveira, João Paulo de Machado Torres, Francisco Gerson Araújo, Isabella Fernandes Delgado, Francisco José Roma Paumgartten   +6 more
doaj   +1 more source

Acanthocephala, Annelida, Arthropoda, Myxozoa, Nematoda and Platyhelminthes parasites of fishes from the Guandu river, Rio de Janeiro, Brazil [PDF]

Using information from all published reports and data collected during several parasitological surveys between April 2003 and September 2009, a checklist of the parasites of fishes from Guandu River, southeastern of Brazil was generated.
Abdallah, Vanessa, Azevedo, Rodney, Luque, José   +2 more
core   +1 more source

Aggression and dominance in cichlids in resident-intruder tests: the role of environmental enrichment

Neotropical Ichthyology, 2011
When establishing dominance residents have a greater likelihood to dominate intruders than vice versa, partially because the resident has more to loose that the intruder has to win. This is known as the prior residency effect.
Vincent Nijman, Boudewijn A. Heuts
doaj  

Caracterização da piscicultura na região do Vale do Ribeira - SP Characterization of fish farming in the Ribeira Valley region - SP

Ciência e Agrotecnologia, 2005
Este trabalho buscou caracterizar a piscicultura na Região do Vale do Ribeira quanto aos sistemas de manejo. Estudaram-se quarenta e duas pisciculturas sendo que, destas, 36 praticam o sistema semi-intensivo e seis o sistema intensivo, com os seguintes ...
Daniela Castellani, Walter Barrella
doaj   +1 more source

First report about saxitoxins in freshwater fish Hoplias malabaricus through trophic exposure. [PDF]

, 2017
Cyanobacterial waterblooms, such as the saxitoxin (STX) producer Cylindrospermopsis raciborskii, have been a worldwide concern in environmental health. However, the bioaccumulation of this neurotoxin in the trophic chain is not completely known.
ASSIS, H. C. S. de, CESTARI, M. M., MAGALHÃES, V. F., OBA, E. T., RAMSDORF, W. A., RIBEIRO, C. A. O., SILVA, C. A. da   +6 more
core   +1 more source

Zoologia aplicada [PDF]

, 2018
XXXII Congresso Brasileiro de Zoologia, Foz do Iguaçu, 2018. Tema: Desafios e perspectivas para a Zoologia na América LatinaCaderno de Resumos de Trabalhos da Área temática Zoologia aplicada, do XXXII Congresso Brasileiro de ZoologiaSociedade Brasileira ...

core  

Aggression and dominance in cichlids in resident-intruder tests: the role of environmental enrichment

Neotropical Ichthyology
When establishing dominance residents have a greater likelihood to dominate intruders than vice versa, partially because the resident has more to loose that the intruder has to win. This is known as the prior residency effect.
Vincent Nijman, Boudewijn A. Heuts
doaj   +1 more source