Examinando por Autor "Zaldivar Abanto, Marco"

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Efecto del empadre posparto y postdestete sobre el tamaño y peso de la camada de cuyes
(Instituto Interamericano de Cooperación para la Agricultura, 1992-03-31) Chauca Francia, Lilia Janine; Zaldivar Abanto, Marco; Muscari Greco, Juan Carmelo
Postpartum breeding ia a common practice among guinea pig-producing farmers, even at the commercial level. This is possible because these animals como into heat 2-3 h postpar tum. Available evidence is not conclusive with regard to the advantages and disadvantages of this practice, when com wall with post-weaning mating. This was carried out in order to generate information that would allow for the intention of existing guinea pig production systems, under the hypothesis that breeding postpartum has no effect on litter size and weight both at birth and at weaning. Data on the first two parturitions of 300 females, at La Molina Agricultural Experimental Station, were analyzed. These females were part of a line-breeding selection program carried out at the station, of which 68.3% presented post-partum gestations and 31.7% post-weaning gestations. The four different maternal lines used made up one variable: Peru (18.3% of all females), Andina (27.7%), Inti (25.3%) and Control (ordinary stock) (28.7%). No differences in terms of mating-partum interval, nor in terms of litter size and weight, both at birth and at weaning, were detected at the first parturition. Comparisons between the selected breed lines showed that mating partum interval was shortest (P≤ 0.01) for the Andina line (81.6 ±1.89). The Andina and Control groups presented larger litters at both birth and weaning. Mating system, evaluated in the second parturition, had no effect at litter size at birth or at weaning. Average individual weight at birth was higher (P≤0.01) in offspring from post-weaning gestations (121 ± 12.43 g vs. 135 ± 3.62 g), a difference that was also noted (P≤0.05) at weaning time (P≤0.01). Partum intervals were 68 ± 0.16 and 112 ± 1.67 days in females conceiving post-partum and post-weaning, respectively. There were no effects of mating system within selected lines with respect to litter size or individual birth or weaning weights. When breed lines were compared (independent of mating system), the Peru and Inti lines showed heavier individual birth weights. Some differences were found among lines with respect to parturition intervals.
Evaluación y estudio económico de curvas de crecimiento de cuatro líneas de cuyes
(Instituto Interamericano de Cooperación para la Agricultura, 1991-01-31) Zaldivar Abanto, Marco; Chauca Francia, Lilia; Chian M., J.; Gutiérrez, N.; Ganoza, V.
It is ussually assumed that weight does not depend on the amount of food eaten by animal but, rather, on its genetic makeuup, which expresses itself over time. Under equal manager and feeding conditions, guinea pigs of the Peru and Inti strains reached marketing weight (750 g) between the ninth and the tenth week of age, while the same weight in the Andina strain amd the control group (common guinea pigs) was not reached until the 12th week. It was also found that breeding weight (540 g) in the Peru and Inti strains is reached one to two weeks earlier than in the Andina strain or the control group. The greatest weekly weight gains were obtained between the first and the third weeks of age, while the lowest increments occurred between the 17th and 19th weeks, except for the Peru strain, which had its lowest weight gain in the 13th week. The total litter weight was superior ( by more than 35%) in the inti an andina strains as compared to the peru and control groups, due to the Peru and control groups, do the fact than the former strains produce litters averaging 3.2 and 3.0 guinea pigs while the letter ones producer only 2.0 and 2.2, respectively time is the most important parameter for the poor farmer, he usually suffers from strong price cubacks, prefers to make small gains now rather than for hither gains in to the future. Nevertheless, the producer is willing to keep his animal for a longer period if net return is too low or, conversely, to sell therm if the net return is high. The producer usually does not realize when the opportunity cost of his capital is equal to zero.
Metodología estadística para la caracterización de fincas de cuyes (Cavia Porcellus)
(Instituto Interamericano de Cooperación para la Agricultura, 1991-01-31) Zaldivar Abanto, Marco; Menacho Ch., C.
The main objetive of this studt was to evaluate a statistical methodology for the characterization of guinea pig farms (Cavia porcellus). The metodology is based on the teory of principal components, wich analyses the structural dependency of sets of multivariate data. In order to properly evaluate the procedure, information for surveys conducted en Cajamarca, Peru in 1987 y 1988, was used. The analyses were carried out with the SPSS/PC package. The results of the study proved that the original nine relevant variables could be sustituted by four principal componets which explained 65% of the total variation as compared to the original variables. The first principal component expresses the livestock prooductivity and farm income derived from the monthly sale of guinea pigs. The second component reflects the behaviour of the head of the family according to age and schooling. The third component examines the family farm labor that could be supported by the monthly consumption of guinea pigs. The fourth expalins that, as family labor becomes scarce, onfarm consumption of the guinea pigs also increases. Besides allowing easy, precise characterization of production system, the principal component analysis identifies the more important variables and their degree of association; as an example of its usefulness, it was found that guinea pig production is, for the most part, geared for self-consumption but this increases if family labor availability decreases, which negatively affects family income.
Proyecto sistemas de producción de cuyes - Tomo I
(Instituto Nacional de Investigación Agraria - INIA, 1994-12) Chauca Francia, Lilia; Zaldivar Abanto, Marco; Muscari Greco, Juan; Higaonna Oshiro, Rosa; Gamarra Montenegro, Julio; Florián Alcántara, Amarante
El presente informe muestra las actividades del Proyecto Sistemas de Producción de Cuyes en sus dos fases. La Fase I tiene por objetivo desarrollar y promover sistemas de producción de cuyes apropiados para crianzas familiares y pequeños productores; y la Fase II tiene por objetivo desarrollar tecnología apropiada para los sistemas de producción de cuyes: familiar y familiar-comercial para el Perú y los países en los que prevalece esta crianza.
Proyecto sistemas de producción de cuyes - Tomo II
(Instituto Nacional de Investigación Agraria - INIA, 1994-12) Chauca Francia, Lilia; Zaldivar Abanto, Marco; Muscari Greco, Juan; Higaonna Oshiro, Rosa; Gamarra Montenegro, Julio; Florián Alcántara, Amarante
El presente informe muestra las actividades del Proyecto Sistemas de Producción de Cuyes en sus dos fases. La Fase I tiene por objetivo desarrollar y promover sistemas de producción de cuyes apropiados para crianzas familiares y pequeños productores; y la Fase II tiene por objetivo desarrollar tecnología apropiada para los sistemas de producción de cuyes: familiar y familiar-comercial para el Perú y los países en los que prevalece esta crianza.