The objective of this systematic scientific review was updated bibliographic information concerning the genetic, morphological, zootechnical and meat potential of creole pigs in Central and South America. It was found a population of 73 million Creoles pigs in Latin America, most under extensive, and semi extensive production systems. Since its European origin, adaptation to different ecosystems on the continent and the introduction of new breeds has led into a wide variety of creole pigs. Adaptation and introduction of breeds have led also in a rise of genetic variability of pigs benefiting the rusticity that involves a more efficient immune system. In the same way as omnivore the creole pig had a good adaptation to different diets, getting better advantage of fibrous and fatty food than commercial breeds. On the other hand, creole pigs showed an acceptable reproductive performance, dis...

The objective of this systematic scientific review was updated bibliographic information concerning the genetic, morphological, zootechnical and meat potential of creole pigs in Central and South America. It was found a population of 73 million Creoles pigs in Latin America, most under extensive, and semi extensive production systems. Since its European origin, adaptation to different ecosystems on the continent and the introduction of new breeds has led into a wide variety of creole pigs. Adaptation and introduction of breeds have led also in a rise of genetic variability of pigs benefiting the rusticity that involves a more efficient immune system. In the same way as omnivore the creole pig had a good adaptation to different diets, getting better advantage of fibrous and fatty food than commercial breeds. On the other hand, creole pigs showed an acceptable reproductive performance, dis...

The objective of this research was to study the distribution and social structure of the guanaco in the Calipuy National Reserve (RNC), La Libertad, Peru. 430 guanacos were reported with a slight downward trend (b = - 10.21), distributed in 114 km2. The adults were most numerous with 73.5% ± 9.8 (p<0.01) followed by juveniles and chulengos 16.1% ± 3.93 y 10.4 ± 5.9 respectively. The 72% of the population was found in family groups, 18% in herds and solitary accounted for 10%. The density was 5.7 individuals per km2. The population was mostly concentrated in the north, above 3000 m (p <0. 01), which is also the most heavily fortified, reaching 18.9 ± 8.97 guanacos/km2 and family groups mainly houses. The western zone under 3000 m and closer to the breeding area, was the lowest density 0.24 ± 0.24 guanacos/km2, and maintained primarily solitary and groups of males.

The objective of this research was to study the distribution and social structure of the guanaco in the Calipuy National Reserve (RNC), La Libertad, Peru. 430 guanacos were reported with a slight downward trend (b = - 10.21), distributed in 114 km2. The adults were most numerous with 73.5% ± 9.8 (p<0.01) followed by juveniles and chulengos 16.1% ± 3.93 y 10.4 ± 5.9 respectively. The 72% of the population was found in family groups, 18% in herds and solitary accounted for 10%. The density was 5.7 individuals per km2. The population was mostly concentrated in the north, above 3000 m (p <0. 01), which is also the most heavily fortified, reaching 18.9 ± 8.97 guanacos/km2 and family groups mainly houses. The western zone under 3000 m and closer to the breeding area, was the lowest density 0.24 ± 0.24 guanacos/km2, and maintained primarily solitary and groups of males.

The objective of this research was to determine the degree of food competition between guanaco and livestock in Calipuy National Reserve. Vegetation cover (CV) was determined by a survey of vegetation and composition of diets using a micro histological technique of feces (50 guanacos, 35 cows and 25 horses). The dietary overlap was determined by Horn Index (I), food preferences by Ivlev index (E) and the diet diversity by Shannon-Weaver index (D) .We found a low - moderate food competition between the guanaco and the cattle and horses. The dietary overlap was greater during the rainy season (I=0.80 and 0.88) where forage supply was high (CV=63%) and lower during the dry season (R=0.58 and 0.64) when there were shortages of food (CV=50%). The guanaco was an intermediate selective consumer. The dietary diversity of adults increased during the dry season (D=0.62, p<0.01) including up to ...

The objective of this research was to determine the degree of food competition between guanaco and livestock in Calipuy National Reserve. Vegetation cover (CV) was determined by a survey of vegetation and composition of diets using a micro histological technique of feces (50 guanacos, 35 cows and 25 horses). The dietary overlap was determined by Horn Index (I), food preferences by Ivlev index (E) and the diet diversity by Shannon-Weaver index (D) .We found a low - moderate food competition between the guanaco and the cattle and horses. The dietary overlap was greater during the rainy season (I=0.80 and 0.88) where forage supply was high (CV=63%) and lower during the dry season (R=0.58 and 0.64) when there were shortages of food (CV=50%). The guanaco was an intermediate selective consumer. The dietary diversity of adults increased during the dry season (D=0.62, p<0.01) including up to ...