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This aggressive behavior is sometimes marked by the acoustic sounds they produce. [16] The red-bellied piranha is not a migratory species [17]: 288 but does search for conditions conducive to reproduction during seasons of increased rainfall. [citation needed] Red-bellied piranhas are omnivores and primarily foragers.
[3] [29] Swimming near fishermen may increase the risk of attacks due to the commotion caused by struggling fish and the presence of bait in the water. [30] [31] Splashing attracts piranhas and for this reason children are more often attacked than adults. [29] Being in the water when already injured or otherwise incapacitated also increases the ...
Also, chronic stress results in prefrontal cortex-dependent response inhibition. This results in reduction in aggression, thus promoting anti-predator responses. [16] [10] A different response to aggression may be observed in other species when it is socially-induced between individuals in the same social group. In gregarious species, such as ...
Psychomotor agitation is typically found in various mental disorders, especially in psychotic and mood disorders. It can be a result of drug intoxication or withdrawal. It can also be caused by severe hyponatremia. People with existing psychiatric disorders and men under the age of 40 are at a higher risk of developing psychomotor agitation. [2]
Chronic stress also has a lot of illnesses and health care problems other than mental that comes with it. Severe chronic stress for long periods of time can lead to an increased chance of catching illnesses such as diabetes, cancer, depression, heart disease and Alzheimer's disease. [ 13 ]
Prolonged stress can disturb the immune, digestive, cardiovascular, sleep, and reproductive systems. [17] For example, it was found that: Chronic stress reduces resistance of infection and inflammation, and might even cause the immune system to attack itself. [27] Stress responses can cause atrophy of muscles and increases in blood pressure. [28]
Stress ulceration is a single or multiple fundic mucosal ulcers that causes upper gastrointestinal bleeding, and develops during the severe physiologic stress of serious illness. It can also cause mucosal erosions and superficial hemorrhages in patients who are critically ill, or in those who are under extreme physiologic stress, causing blood ...
Excessive amounts of stress, however, can increase the risk of strokes, heart attacks, ulcers, and mental illnesses such as depression [2] and also aggravate pre-existing conditions. Psychological stress can be external and related to the environment, [3] but may also be caused by internal perceptions that cause an individual to experience ...