Resistencia a Parásitos Gastrointestinales en Ovinos Florida, Pelibuey y Sus Cruzas en El Trópico Mexicano Resistance to Gastrointestinal Parasites in Florida, Pelibuey and Crossbred Sheep in the Mexican Tropics

Gastrointestinal parasites cause considerable losses in sheep pro- duction, and Florida Native sheep show a certain resistance to these parasites. An experiment was conducted in Tepetates, Veracruz, in which 32 six-to-eight-month-old lambs (15 ewe lambs and 17 ram lambs) were utilized including 6 Florida Natives (F), 6 Pelibuey (P), 8 FxP, 6 PxF and 6 more as a control group,