Results 61 to 70 of about 247 (152)

SELETIVIDADE EM REDES DE EMALHAR UTILIZADAS NA PESCA DE ACARÁ ( Geophagus brasiliensis. QUOY & GAIMARD,1824 (OSTEICHTHYES, CICHLIDAE ) E ÉPOCA DE SUA REPRODUÇÃO NA REPRESA DE PONTE NOVA, RIO TIETí­Å , ESTADO DE SÃO PAULO, BRASIL

Boletim do Instituto de Pesca, 2018
Foi determinada a curva de seletividade das redes de emalhar utilizadas na captura do acará, Geophagus brasiliensis, segundo Gulland (1969). O resultado é: c*(L)= e-0,3104(L - 1,3283 m)2 Onde: c*(L)= frequência relativa de retenção L ...
Arlete MOTA, Elmar Cardozo CAMPOS, Jair Duarte RODRIGUES   +2 more
doaj  

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

Water level influences on body condition of Geophagus brasiliensis (Perciformes: Cichlidae) in a Brazilian oligotrophic reservoir

Neotropical Ichthyology
Effects of water level fluctuations on body condition of Geophagus brasiliensis were studied in a 30 km² Brazilian oligotrophic reservoir. Physiological condition (K) and gonadosomatic index (GSI) were compared according to water level (low and high ...
Alejandra Filippo Gonzalez Neves dos Santos, Luciano Neves dos Santos, Francisco Gerson Araújo   +2 more
doaj   +1 more source

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

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

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

Clinostomum sp. (Digenea: Clinostomidae) e Ascocotyle sp. (Digenea: Heterophyidae): metacercárias com potencial zoonótico em peixes da bacia do Rio Tramandaí­­, sul do Brasil

Boletim do Instituto de Pesca, 2018
Os helmintos pertencentes í­Â  Classe Trematoda têm grande importí­¢ncia na ictioparasitologia, onde a Subclasse Digenea apresenta parasitos com potencial zoonótico.
Alice POZZA, Fábio LIMA, Mateus Luís HAAS, Pablo Cesar LEHMANN ALBORNOZ   +3 more
doaj   +1 more source

Mapping the hidden diversity of the Geophagus sensu stricto species group (Cichlidae: Geophagini) from the Amazon basin. [PDF]

PeerJ, 2021
Ximenes AM, Bittencourt PS, Machado VN, Hrbek T, Farias IP.   +4 more
europepmc   +1 more source

Feeding convergence in South American and African zooplanktivorous cichlids Geophagus brasiliensis and Tilapia rendalli

Environmental Biology of Fishes, 1991
Acara, Geophagus brasiliensis, and red-breasted bream, Tilapia rendalli, are important planktivorous cichlids in southern Brazilian lakes and reservoirs. In laboratory experiments, I quantified behavior and selectivity of different sizes of these two fish feeding on lake zooplankton. Feeding behavior depended on fish size. Fish 70 mm were pump-filter
openaire   +2 more sources