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Mostrando ítems 1-10 de 2003
Environmental light color affects the stress response of Nile tilapia
(2013-02-01)
We investigated the effects of environmental light colors (blue, yellow and white) on the stress responses (measured by changes in ventilatory frequency - VF) of Nile tilapia to confinement. After 7 days of light treatment, ...
Peroxidase activity as an indicator of water stress in sweet pepper plants
(2006-10-01)
The purpose of the study was to evaluate the physiological and biochemical behavior of sweet pepper (Capsicum annuum L.) plants under different soil water availability conditions and the efficiency of the peroxidase (EC. ...
Chronic restraint or variable stresses differently affect the behavior, corticosterone secretion and body weight in rats
(Elsevier B.V., 2007-01-30)
Organisms are constantly subjected to stressful stimuli that affect numerous physiological processes and activate the hypothalamo-pituitary-adrenal (HPA) axis, increasing the release of glucocorticoids. Exposure to chronic ...
Chronic social stress in rainbow trout: Does it promote physiological habituation?
(Academic Press Inc. Elsevier B.V., 2008-01-01)
The effect of chronic social stress on growth, energetic substrates and hormones was tested in rainbow trout, Oncorhynchus mykiss. After a 14-day isolation period, the fish were paired for 8 days. In order to expose fish ...
Physiological responses associated with capture and crowding stress in matrinxã Brycon cephalus (Gunther, 1869)
(2004-02-26)
The dynamics of plasma cortisol, blood glucose, plasma chloride and liver glycogen were investigated in matrinxã (Brycon cephalus) submitted to capture and various periods of crowding. A total of 400 fish (700 ± 22 g weight) ...
Use of Physiological Parameters in Screening Drought Tolerance in Sugarcane Genotypes
(2011-09-01)
The physiological response of four commercial sugarcane genotypes to water stress was evaluated by measuring the photochemical efficiency of the photosystem II (chlorophyll a fluorescence ratio, F v/F m), estimated chlorophyll ...
Aggressive behaviour traits predict physiological stress responses in Nile tilapia (Oreochromis niloticus)
(Taylor & Francis Ltd, 2009-03-01)
This study tested whether aggressive behaviour can predict individual variation in stress responses of Nile tilapia Oreochromis niloticus. We used a mirror test to measure tendency to aggressive behaviour, and calculated ...
Melissa officinalis and Passiflora caerulea infusion as physiological stress decreaser
(-CENTURY PUBLISHING CORP, 40 WHITE OAKS LN, MADISON, WI 53711 USA, 2013)