Results 11 to 20 of about 1,800 (195)

Caracterização seminal de carás (Geophagus brasiliensis - Cichlidae) induzidos artificialmente

Pesquisa Agropecuária Gaúcha, 2019
Um estudo foi realizado com o objetivo de avaliar as características seminais do cará Geophagus brasiliensis mantido em cativeiro com e sem indução hormonal.
Andréa Ferretto Rocha, Abdel Correia Handem, Mario Luiz Biazzetti Filho, Marcia Regina Stech, Mario Roberto Chim Figueiredo   +4 more
doaj   +4 more sources

Temperature affects the hypoxia tolerance of neotropical Cichlid Geophagus brasiliensis [PDF]

Neotropical Ichthyology, 2018
Oxygen and temperature are the most limiting factors in aquatic environments. Several species are exposed to variations of these factors in water because of physical, chemical and biological processes.
Jéssica A. Pereira, Alexandra C.S. Veronez, Gabriel C. Coppo, Charles Duca, Adriana R. Chippari-Gomes, Levy C. Gomes   +5 more
doaj   +3 more sources

Blood parameter analysis and morphological alterations as biomarkers on the health of Hoplias malabaricus and Geophagus brasiliensis [PDF]

Brazilian Archives of Biology and Technology, 2006
This study aimed to assess the influence of the environment on fish health. Samples of Hoplias malabaricus and Geophagus brasiliensis, were collected from three different environments: area I was urban and areas II and III were rural.
Silvia Romão, Lucélia Donatti, Matheus O. Freitas, Josiane Teixeira, Josiana Kusma   +4 more
doaj   +4 more sources

Multiple soluble malate dehydrogenase of Geophagus brasiliensis (Cichlidae, Perciformes) [PDF]

Genetics and Molecular Biology, 1998
A recent locus duplication hypothesis for sMDH-B* was proposed to explain the complex electrophoretic pattern of six bands detected for the soluble form of malate dehydrogenase (MDH, EC 1.1.1.37) in 84% of the Geophagus brasiliensis (Cichlidae ...
Aquino-Silva Maria Regina de, Schwantes Maria Luiza B., Schwantes Arno Rudi   +2 more
doaj   +8 more sources

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

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
Lazzaro, Xavier
core   +3 more sources

GROWTH OF Geophagus brasiliensis REARED AT DIFFERENT TEMPERATURES AND FEEDING REGIMES

Boletim do Instituto de Pesca, 2021
The aim of this study was to evaluate the growth performance of Geophagus brasiliensis rearedb under distinct temperatures (24.3 ± 0.9, 28.1 ± 1.0, and 31.7 ± 0.8°C) and feeding regimes (apparent satiety and a supply of 4% of the total biomass ...
Leone de Souza MEDINA, Maurício Gustavo Coelho EMERENCIANO, Fábio BITTENCOURT, Giovanni Lemos de MELLO   +3 more
doaj   +2 more sources

O papel de Ancyrocephalinae (Monogenea: Dactylogyridae), parasito de Geophagus brasiliensis (Pisces: Cichlidae), como indicador ambiental The role of Ancyrocephalinae (Monogenea: Dactylogyridae), parasite of Geophagus brasiliensis (Pisces: Cichlidae), as an environmental indicator

Revista Brasileira de Parasitologia Veterinária, 2009
As variações nas populações de parasitos em peixes podem ser indicadoras de alguma alteração ambiental. Tendo por objetivo o estudo da variação do parasitismo por Ancyrocephalinae em Geophagus brasiliensis, foram comparados dois reservatórios de ...
Rubens Riscala Madi, Marlene Tiduko Ueta
doaj   +2 more sources

Active eDNA Is More Cost‐Effective Than Fyke Nets or Passive eDNA Collection When Monitoring the Invasion of an Alien Freshwater Fish

Environmental DNA
Monitoring alien species is critical to their management. However, early detection of invading alien freshwater fish can be challenging due to the difficulty of observing fish in low abundance.
Lenore Morris, Leah S. Beesley, Emma R. Stevens, Daniel C. Gwinn, Josephine Hyde, Suzanne Thompson, Deirdre B. Gleeson, Michael M. Douglas   +7 more
doaj   +2 more sources

Rapid morphological change in multiple cichlid ecotypes following the damming of a major clearwater river in Brazil. [PDF]

Evol Appl, 2020
Abstract While anthropogenic disturbances can have damaging effects on biodiversity, they also offer an opportunity to understand how species adapt to new environments and may even provide insights into the earliest stages of evolutionary diversification. With these topics in mind, we explored the morphological changes that have occurred across several
Gilbert MC, Akama A, Fernandes CC, Albertson RC.   +3 more
europepmc   +2 more sources

Toxicity of naphthalene in the Neotropical Fish Astyanax Lacustris (Characiformes: Characidae) and Geophagus Brasiliensis (Perciformes: Cichlidae) [PDF]

Evidência, 2017
Polycyclic aromatic hydrocarbons are one of the most important organic pollutants in environmental studies. The aim of this study was to assess the naphthalene acute toxicity in two fish species, Astyanax lacustris (LLcust, 1875) and Geophagus ...
Geonildo Rodrigo Disner, Sabrina Louise Moraes Calado, Helena Cristina Silva Assis, Marta Margarete Cestari   +3 more
doaj   +3 more sources