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Red-bellied piranhas often travel in shoals as a predatory defense, as well as for the offense. In studies that tested the piranhas' reactions to a simulated predator attack, resting opercular rates returned to normal more quickly among piranhas that were in shoals of eight rather than in shoals of two. Although it has been presumed that ...
This fish is an omnivore, and has aggressive tendencies when hungry, stressed, or seeking live food. Like most in the Serrasalmidae family, piraya piranhas dental morphology has a major influence for their inclination toward piscivorous and herbivorous behavior [3].
A description of workplace violence by Wynne, Clarkin, Cox, & Griffiths (1997), define workplace violence to be incidents resulting in abuse, assault or threats directed towards staff with regard to work–including an explicit or implicit challenge to their safety, well-being or health. [5] The rate of aggression within the health care varies ...
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Employers Plan Aggressive Response to Shifting Health Care Landscape, Towers Watson/National Business Group on Health Survey Finds Health care costs increase at lowest rate in 15 years NEW YORK ...
A piranha or piraña (/ p ɪ ˈ r ɑː n j ə ˌ-r æ n /, or / p ɪ ˈ r ɑː n ə /; Portuguese: [piˈɾɐ̃ɲɐ], Spanish:) is any of a number of freshwater fish species in the family Serrasalmidae, [1] or the subfamily Serrasalminae within the tetra family, Characidae [2] in order Characiformes.
Piranhas are attracted by splashes of water and the smell of blood. Particularly dangerous for the human are four species of large piranhas, two of which are well-known: ordinary piranha (Rooseveltiella nattereri) and big piranha (Pygocentrus piraya). After being placed into aquarium, they loose their aggressiveness".
This is an overview of the snakes that pose a significant health risk to humans, through snakebites or other physical trauma. The varieties of snakes that most often cause serious snakebites depend on the region of the world. In Africa, the most dangerous species include black mambas, puff adders, and carpet vipers.