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Diet-morphology relationship in the stream-dwelling characid Deuterodon stigmaturus (Gomes, 1947) (Characiformes: Characidae) is partially conditioned by ontogenetic development Neotropical Ichthyology
Dala-Corte,Renato Bolson; Silva,Eliane Regina da; Fialho,Clarice Bernhardt.
ABSTRACT We tested whether interindividual variations in diet composition within a population of Deuterodon stigmaturus can be explained by morphological differences between individuals, and whether diet-morphology relationships are dependent on the ontogenetic development. We analyzed diet of 75 specimens sampled in a coastal stream of Southern Brazil. Variation in stomach content was summarized with a Principal Coordinate Analysis (PCoA). The retained PCoA axes were tested as response to standard length (SL), and to values of intestine length (IL) and mouth length (ML) independent of body size, using linear mixed-effects models (LMM). The most consumed food items by D. stigmaturus were filamentous algae (41%), terrestrial plants (20.3%), detritus (12%),...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Characin; Coastal drainage; Feeding; Freshwater fish; Intraspecific variation.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000200209
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Toxicological and pharmacological evaluation of Discaria americana Gillies & Hook (Rhamnaceae) in mice BJPS
Silva,Eliane Regina da; Diedrich,Denise; Bolzan,Rodrigo Cordeiro; Giacomelli,Sandro Rogério.
Medicinal plants (e.g. Discaria americana) have been used by populations for centuries. However, popular use is not enough to validate these plants as safe and effective medicinal products. The present study sought to evaluate the acute and subacute toxicity as well as the anxiolytic and antinociceptive effects of D. americana root bark and aerial parts extracts in mice. In acute toxicity studies, mice were treated with single intraperitoneal doses of the aforementioned extracts. Subacute toxicity studies were performed by oral administration of the extracts over 14 days. Anxiolytic studies consisted of the elevated plus maze method, and antinociceptive studies were based on the hot plate test. The LD50 value for D. americana aerial parts extract was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Discaria americana/phamacognosy; Medicinal plants; Discaria americana/toxicological analysis; Discaria americana/acute toxicity; Discaria americana/subacute toxicity; Discaria americana/anxiolytic effect; Discaria americana/antinociceptive effect.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502012000200011
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