
O experimento foi realizado com o objetivo de testar o efeito de dois meios diluidores (Glicose 5% e água de côco) no congelamento do sêmen de piracanjuba (Brycon orbignyanus, Vallenciennes, 1849) e dois descongelamentos do sêmen (60ºC durante 5 segundos e 50ºC durante 10 segundos). Foi utilizado como ativador da motilidade espermática pós-descongelamento o bicarbonato de sódio 1%. Um fatorial 2 x 2 foi utilizado para analisar o efeito dos dois modelos de descongelamento e dos diluidores sobre a motilidade espermática pós-descongelamento, sua duração e porcentagem de espermatozóides vivos pós-descongelamento. A motilidade espermática pós-descongelamento média foi de 74,17 ± 22,45%, quando se utilizou a glicose 5% como diluidor e descongelamento a 50ºC, durante 10 segundos, observando-se diferença significativa na interação entre diluidor e descongelamento. A duração da motilidade espermática não apresentou diferença entre os diluidores e descongelamentos, com média de 153,33 ± 59,61 segundos. A porcentagem de espermatozóides vivos pode ser utilizada para avaliação de sêmen de peixes e apresentou resultados significativos apenas quando da interação entre descongelamento a 50ºC durante 10 segundos e diluidor com glicose 5%. Esta combinação foi mais efetiva na preservação da integridade dos espermatozóides de piracanjuba pós-descongelamento, com média de 67,83 ± 17,67% de espermatozóides vivos.The aim of this experiment was to test the effects of two extenders (Glucose 5% and Coconut Water) and two thawing rates (60ºC during 5 seconds and 50ºC during 10 seconds) for semen of Piracanjuba (Brycon orbygnianus, Vallencienens, 1849). A solution of NaHCO3 1% was used to activate motility. A factorial 2 x 2 was used to analyze the results on sperm motility and its duration, and the percentage of living sperm after thawing. The highest sperm motility values (74.17 ± 22.45%) were achieved when the combination of coconut water and thawing rates of 50ºC during 10 seconds was used. The other combinations of extender and thawing rates produced lower sperm motility. The sperm motility duration was not affected by any of the combinations of extenders and thawing rates. The thawing rates showes the average of 153.33 ± 59.61 seconds. The highest percentage of living sperm values (67.83 ± 17.67%) was obtained when the combination of glucose 5% and thawing rates of 50ºC during 10 seconds was used. This combination was more effective on the preservation of sperm piracanjuba integrity after freezing.
criopreservation, criopreservação, Brycon orbignyanus, sêmen, semen, Brycon orbygnianus, SF1-1100, Animal culture
criopreservation, criopreservação, Brycon orbignyanus, sêmen, semen, Brycon orbygnianus, SF1-1100, Animal culture
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