Biometria testicular de touros da raça Crioula Lageana / Testicular biometry of the Crioula Lageana breed bulbs

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

The purpose of this experiment was to study the testicular morphologic parameters of the Crioula Lageana breed bulls, a breed that was threatened by extinction and, nowadays it is in recovery process through an association of creators. The experiment has developed with flocks of genetic preservation of the breed, linked to the Associação Brasileira de Criadores de Bovinos da Raça Crioula Lageana, located in Lages, Santa Catarina/Brazil. Sixty animals were evaluated with age between 18 and 144 months. The animals were divided in four treatments according to age: Treatment I, animals with 18 months of age; Treatment II, animals between 24 and 36 months of age; Treatment III, animals between 48 and 60 months of age; and Treatment IV, animals with 72 months or more. The researched parameters were: a) scrotal circumference (SC); b) length and testicular width; c) testicular volum and d) testicular form. Averages for the researched parameters were of 29,50 + 2,94; 33,68 + 2,52; 35,16 + 2,83 and 36,62 + 3,19cm for SC; 9,49 + 0,85; 10,79 + 1,00; 11,70 + 1,58 and 12,13 + 1,91cm for testicular length; 5,80 + 0,70; 6,47 + 0,58; 7,12 + 0,74 and 7,15 + 0,68cm for testicular width and 510,05 + 147,86; 720,96 + 181,82; 957,43 + 315,45 and 992,09 + 262,64cm for testicular volum, for groups I, II, III and IV, respectively. In relation to the format the moderate long way prevailed, followed by the moderate-oval, long and ovalspherical way, respectively with 60,83%; 30%; 7,5% and 1,67%. The largest increase in SC was observed in animals with age between 18 and 24 months. The testicles presented volume increase until five-years of age. The Crioula Lageana breed bulls showed dominance of testicles in the moderate long way, in all age groups. The appraised morphologic parameters indicate that the testicles of the studied bulls resemble each other to the described in zebuine animals and for synthetic breeds of crossings between taurine and zebuine.

ASSUNTO(S)

beef cattle reprodução animal reproducao animal bovino de corte animal reproduction

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