Resumen

BASTARDO, Hilda; SCORZA, Cecilia  y  SOFIA, Sara. Hematological and biochemical variables in the rainbow trout, on relation with hepatic condition and age. Zootecnia Trop. [online]. 2006, vol.24, n.1, pp.1-15. ISSN 0798-7269.

This research was carried out in the National Park Sierra Nevada in Mérida, Venezuela. The objective was to study the hepatic condition and some biochemical and hematology variables of rainbow trout of different age. There were utilized 300 animals of 13 to 73 months of age, was establish ten lots of each ages. Was determined body weight and liver weight for to esteem hepatosomatic index. The macroscopic condition hepatic was established making reference to healthy liver, any different form was considered abnormal. Samples of blood were taken to determine haematocrit, haemoglobin and aminotransferase (aspartate and alanine). The hepatosomatic index of the trout with liver tumors was significantly greater than the normal liver, abnormal coloration and spot. The macroscopic condition hepatic of the rainbow trout between 13 and 20 months old was normal. The histology study reports 3.3% hepatic carcinoma in the twenty months old group. From this age to forward the values were falling with the lowest values between the ages of 55 to 73 months. The relation between hepatic condition and the age indicated positive a lineal relationship with r²= 0,499 (P<0.05). Rainbow trout haematocrit with tumors and spot were significantly lower than the normal liver and abnormal coloration. From twenty eight months old it was to go down to the trout of 73 months old. The haemoglobin was similar in all condition hepatic, but haemoglobin of the trout of 73 months old presented valor significantly lower than the others group. The aminotransferase of trout with normal liver was significantly greater than trout with spot and tumors. The enzymatic activity of alanine and aspartate aminotransferase was higher in the male than in the female.

Palabras clave : Trout, hematocrit; hemoglobin; aminotransferase; carcinoma hepatic..