Results 51 to 60 of about 247 (152)
Effects of short‐ and long‐term enrichment on brain and behavior in Trinidadian guppies
Ethology, Volume 130, Issue 3, March 2024.Environmental enrichment often alters behavior in captive animals. Here, we exposed guppies either to short‐term (two week) or long‐term (birth through 12 weeks) enrichment and measured growth, brain size, and neophobic behaviors. Females responded more strongly overall to enrichment in both short‐ and long‐term.
R. Quinn Iffert, Laura R. Stein
wiley +1 more source
Acta Scientiarum: Biological Sciences, 2010 O presente trabalho estuda a variação sazonal dos metazoários parasitos de Geophagus brasiliensis do rio Guandu, Estado do Rio de Janeiro, Brasil. Para isso foram realizadas quatro coletas trimestrais de 50 espécimes de G.
Adriano Reder de Carvalho +2 more
doaj
Acta Scientiarum: Biological Sciences, 2018 The Paraíba do Sul River (PSR) drainage basin in Southeastern Brazil covers one of the most industrialized and densely populated regions of the country. The impact of chemical contamination on the PSR basin seems to be more pronounced in its middle reach
Claudio Nona Morado +4 more
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
Acta Scientiarum: Biological Sciences, 2006 Foram estudados 50 acarás Geophagus brasiliensis (Quoy e Gaimard, 1824) provenientes do rio Guandu, coletados próximo ・barragem da Estação de Tratamento de àgua (ETA) (22º48’32”S, 43º37’35”O), no Estado do Rio de Janeiro, no período de dezembro de 2004 ...
Rodney Kozlowiski de Azevedo +2 more
doaj +1 more source
Ichthyofauna of the Ribeirão Taboão, Paraíba do Sul river basin, Mogi das Cruzes, SP [PDF]
Check List, 2014 We present herein a list of fish species from Ribeirão Taboão, a tributary of Rio Paraíba do Sul basin that is located in the metropolitan region of São Paulo. Fish were caught with trapezoid hand nets, mesh nets and fish traps. We sampled 145 specimens,
Marina Loeb +2 more
doaj +3 more sources
Acta Scientiarum: Biological Sciences, 2008 Metacercárias do tipo Neascus, um dos agentes causadores da doença dos pontos pretos, são descritas a partir de espécimes coletados de 33 espécimes de Geophagus brasiliensis coletados no rio do Peixe, Monte Verde, município de Juiz de Fora, Estado de ...
Adriano Reder de Carvalho +2 more
doaj
Latin American Journal of Aquatic Research, 2014 An experiment was conducted to evaluate the effect of temperature on the intensity of predation upon snails. The experiment was run for 60 days using 15 cement tanks with water temperatures of 18, 22, 26, 30 and 34°C in a completely randomized design ...
Ariany Rabello da Silva +1 more
doaj +1 more source
Acta Scientiarum: Biological Sciences, 2008 O presente estudo objetivou conhecer a dieta natural de espécies residentes no reservatório de Ribeirão das Lajes (RJ), sendo realizada a análise do conteúdo estomacal de peixes capturados por meio de redes de espera, em duas épocas distintas.
Ana Carolina Monteiro Iozzi Dias +2 more
doaj +1 more source
Aquatic Invasions, 2013 The highly endemic (82%) freshwater fishes of south-western Australia are imperiled due to severe habitat and water quality declines and impacts of introduced species. As a case study of the recent tropical aquarium fish introductions, the biology and ecology of the pearl cichlid Geophagus brasiliensis was determined in the Swan River catchment south ...
Beatty, S.J. +4 more
openaire +1 more source