Results 161 to 170 of about 3,438 (182)
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Fish Physiology and Biochemistry, 2015
The neural circuitry for social behavior and aggression appears to be evolutionarily conserved across the vertebrate subphylum and involves a complex neural network that includes the hypothalamus as a key structure. In the present study, we evaluated the changes in monoamine levels in the hypothalamus and on serum cortisol and plasma glucose of ...
Wolkers, Carla Patrícia Bejo +2 more
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The neural circuitry for social behavior and aggression appears to be evolutionarily conserved across the vertebrate subphylum and involves a complex neural network that includes the hypothalamus as a key structure. In the present study, we evaluated the changes in monoamine levels in the hypothalamus and on serum cortisol and plasma glucose of ...
Wolkers, Carla Patrícia Bejo +2 more
openaire +3 more sources
Physiology & Behavior, 2015
The dichotomic effect of a cortisol level rise in vertebrate behavior has been widely observed. Generally, a chronic increase of the hormone level inhibits aggression, while an acute rise increases aggression. However, in this study, we show that this increase in aggression through an acute rise of cortisol also depends on the context in which the ...
Serra, Monica +2 more
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The dichotomic effect of a cortisol level rise in vertebrate behavior has been widely observed. Generally, a chronic increase of the hormone level inhibits aggression, while an acute rise increases aggression. However, in this study, we show that this increase in aggression through an acute rise of cortisol also depends on the context in which the ...
Serra, Monica +2 more
openaire +3 more sources
Moments of induced spawning and embryonic development of Brycon amazonicus (Teleostei, Characidae)
Zygote, 2013SummaryBased on the economic and ecological relevance of Brycon amazonicus, the goal of this work was to describe the diameter of oocytes and eggs of this species, as well as the chronological embryonic development. The material was provided by Buriti fish farm, Nova Mutum – MT, Brazil.
Okada Nakaghi, Laura Satiko +4 more
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Effect of high levels of dietary vitamin C on the blood responses of matrinxã (Brycon amazonicus)
Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 2007Juvenile matrinxã (Brycon amazonicus) were fed with different dietary vitamin C (ascorbic acid or AA) concentrations for 2 months in order to evaluate its effect on the physiological condition of this species. Five treatments were tested: Reference diet-RD (350 mg AA kg(-1) and 45% crude protein commercial feed); C400, C500, C600 and C800 with ...
Affonso, Elizabeth Gusmão +10 more
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Morphologie
Brycon amazonicus, a fish species widely distributed along freshwater rivers in Latin America, is important in maintaining ecological balance. Although some morphological/physiological aspects of B. amazonicus have been reported, the cardiac histomorphology of this species remains poorly understood.
Diego D. dos Santos +8 more
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Brycon amazonicus, a fish species widely distributed along freshwater rivers in Latin America, is important in maintaining ecological balance. Although some morphological/physiological aspects of B. amazonicus have been reported, the cardiac histomorphology of this species remains poorly understood.
Diego D. dos Santos +8 more
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Brycon amazonicus larviculture cannibalism is reduced in biofloc systems
AquacultureJudá Izel-Silva +6 more
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Inseminating Dose for the Artificial Fertilization of Brycon amazonicus (Teleostei: Characidae)
Zygote, 2021Marle Angelica Villacorta-Corrêa +1 more
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