Removal of Penile Spicules of Covies (Cavia porcellus) and its Effect on Weight Gain and Aggressiveness

  • Cornelio A. Rosales Jaramill Faculty of Agricultural Sciences, University of Cuenca, Ecuador
  • Ermes R. Rodas Carpi Faculty of Agricultural Sciences, University of Cuenca, Ecuador
  • Pedro E. Nieto Escandón Faculty of Agricultural Sciences, University of Cuenca, Ecuador
  • Carlos S. Torres Inga Faculty of Agricultural Sciences, University of Cuenca, Ecuador
  • Burgos G. Gordillo Guambana Faculty of Agricultural Sciences, University of Cuenca, Ecuador
  • Christian Aucapiña Faculty of Agricultural Sciences, University of Cuenca, Ecuador
  • Danny Marín Faculty of Agricultural Sciences, University of Cuenca, Ecuador

Resumen

This research took place on Irquis Farm, University of Cuenca, Victoria del Portete parish, Cuenca canton, prov-ince of Anzuay, Ecuador. The effects of penile spicule extirpation on weight gain and aggressiveness, and damage caused to the carcass at the beginning of growing/fattening were studied. The study consisted of three treatments: whole animals without castration, used as controls (T1); animals with extirpation of the glans´s spicules (T2); and chemically castrated animals, using 0.5 ml of 2% alcohol with iodine, directly injected in each testicle (T3). A total of 90 animals were included, following a randomized block design with six treatments and five replicas. The diet consisted of forage mixture of 33-35% dry matter, and a commercial feed supplement administered ad libitum. A co-variance analysis (ANACOVA) was made using the initial weight as co-variable. The final weight was significantly influenced by the treatment; the Tukey´s test resulted in higher final weight in T2, followed by T1. Their behavior was significantly different from T3 (P < 0.05). In relation to aggressiveness expressed in carcass damage, no signifi-cant differences were observed, according to Chi-square test (P > 0.05).

Publicado
2018-06-27
Sección
Salud Animal