EVALUACION DE CINCO PROTOCOLOS DE CONSERVACIóN DE TEJIDOS EN CHIGüIRO (Hydrochaeris hydrochaeris) (LINNAEUS, 1766)

bodies conservation is a technique that uses the formalin chemical almost exclusively. it's use dehydrates the tissues, takes the tissues dissection very hard and volatilized contaminants fumes. with the purpose to carry out morphological studies in chiguiros (hydrochaeris hydrochaeris) and minimize contaminants effects for exclusive use of formalin, tests were made with five conservations protocol's, using compounds such: formalin at 5, 12, 14, 16 y 18 %; phenol at 3, 5, 7 and 8 %; glycerin at 1, 5 and 10 %; ethanol at 5, 7, 10 y 12 %, using two experimental animals for each one. specimens were anesthetized with a mixture of atropine, midazolam, ketamine and xylazine. exsanguinations and application of conservation protocols, was made through the carotid artery, using an injection fluids pump. volume applied was calculated according with ten per cent of corporal weight of each specimen. dissection was begun ten days after conserving protocols applied. muscle tissues were took to different times (30, 60, 90, 120 after protocols applications), to verified the actions of each protocol. protocol 1 is behaving properly, because the corpses were preserved in good condition during the study period, allowing the realization of dissections and supported the manipulation of parts, protecting them from the climatic conditions prevailing in the area. the protocol two and three had similar behavior to one, the tissues were softer, but more dehydrated by the use of higher concentrations of formaldehyde. it is noteworthy that vapor contamination was significantly reduced. in protocol 4, the tissues of the head, neck, upper extremities and thoracic viscera, were kept well hydrated and better. protocol 5, follows the same pattern of others. the preservation of tissues was good, with no perceived excess volotility of gas, the dissection corried out more comfortobly. still need to analyze the histological studies relating to the last sampling (120 days) to determine the effect on the