Evalúa un total de 165 truchas juveniles Arco Iris (Oncorhynchus mykiss), procedentes del centro de cultivo de Pachacayo de la SAIS Tupac Amaru, ubicado en Jauja-Junín y que presentaban al menos un signo de enfermedad como melanización, cambios en la natación, exoftalmia, entre otros; con el objetivo de reconocer y describir las lesiones anatomohistopatológicas halladas en los diferentes órganos de las truchas para asociarlas con posibles enfermedades. Los resultados fueron lesiones macroscópicas como: melanización de la piel en 81.0%3.1%(147/165), cataratas en 50.3%3.9%(83/165) y cambios degenerativos del hígado en 57.6%3.8%(95/165); mientras que las lesiones microscópicas fueron: alteraciones en epitelio branquial en 69.7% 3.6%(115/165), degeneración grasa del hígado en 97.0%1.3%(160/165), degeneración de túbulos renales en 62.4%3.8%(103/165), y lesiones...

The histological description of ovarian follicles of the 12, 18 and 24-month-old paiche (Arapaima gigas) from a fish farm in Iquitos in May 2018 was performed using a convenience sampling. Nine, 13 and 4 fish ovaries of 12, 18 and 24 months, respectively were used. A follicular classification was developed based on the follicular characteristics and based on this, the ovarian follicular ratio, follicular diameters, and the percentage of follicular atresia were determined. The following phases are considered: Perinucleolar (PN), Endogenous vitellogenesis I (VE1), Endogenous vitellogenesis II (VE2) and exogenous vitellogenesis (VEX). The highest frequency of PN follicles was presented at the age of 12 months (p<005), with no significant differences in the frequency of VE1 follicles at 18 and 24 months. VE2 and VEX stages were only observed at 24 months of age. No significant difference ...

The histological description of ovarian follicles of the 12, 18 and 24-month-old paiche (Arapaima gigas) from a fish farm in Iquitos in May 2018 was performed using a convenience sampling. Nine, 13 and 4 fish ovaries of 12, 18 and 24 months, respectively were used. A follicular classification was developed based on the follicular characteristics and based on this, the ovarian follicular ratio, follicular diameters, and the percentage of follicular atresia were determined. The following phases are considered: Perinucleolar (PN), Endogenous vitellogenesis I (VE1), Endogenous vitellogenesis II (VE2) and exogenous vitellogenesis (VEX). The highest frequency of PN follicles was presented at the age of 12 months (p<005), with no significant differences in the frequency of VE1 follicles at 18 and 24 months. VE2 and VEX stages were only observed at 24 months of age. No significant difference ...