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Articles by L. Mayagoitia
Total Records ( 3 ) for L. Mayagoitia
  I. Escobar-Ibarra , L. Mayagoitia , C. Gonzalez-Rebeles , R. Ramirez-Necoechea , D. Mota and M. Alonso-Spilsbury
  The aim of the study was to analyse the scent marking patterns in frequency, type and position throughout the reproductive period of two pairs of Canis lupus baileyi housed in two zoos (LZ = Leon and ZZ = Zacango), in terms of newly and established pairs. Focal behaviour sampling was used to register 1,211 scent markings. Data were grouped in three periods: before, during, after and posterior to the reproductive season. Between newly formed pairs no significant difference was found in the previous period (U = 6.50, p>0.065); also, no significant difference was observed in the double marking (U = 54.0, p>0.083) during the reproductive season, although it was greater in the LZ compared to the ZZ pair. After commingling together for one year the established LZ couple, showed an increase in double marking (U = 16.5, p<0.001) during the mating period in comparison with the prior year. Male wolves marked with greater frequency with the leg raised in both, the double and single marking, whereas females marked more in a squatting position. It is concluded that scent marking is different in recently formed pairs in captivity, which are found in a reduced space and have not free choice to elect its mate.
  M. Alonso-Spilsbury , I. Escobar-Ibarra , L. Mayagoitia , R. Ramirez-Necoechea and D.Mota-Rojas
  The social and maintenance behaviors of two pairs of Mexican gray wolf in captivity were studied. Wolves belonged to Zacango (ZZ) and Leon Zoo (LZ). For the ZZ pair significant differences were observed (p<0.01) for the social behaviors, whereas no differences were found for neutral or affiliative behaviors. The LZ pair showed no differences in social behavior before the breeding season, but after this significant differences were observed for playing and sexual activity (p<0.001). Wolves showed a preference (p<0.0001) to perform their activities on a reduced place far away from the human transit, especially those related with the courtship behavior. For the ZZ pair a total number of 389 mounting observations were registered during 11 consecutive days, most of them with pelvic movements but only two culminating with copulation (0.6%). The LZ pair showed a reproductive activity of 180 mountings, three of them culminating with copula (1.6%); none of the pairs showed reproductive success. Reproductive success depends on both physiological and behavioral compatibility, but some other causes may be involved in the reproductive failure of the ZZ pair, among them the stress of restraining for the cytology studies and the housing conditions like the presence of large predators as closer neighbors to the wolves.
  M. Alonso-Spilsbury , L. Mayagoitia , M.E. Trujillo , R. Ram?rez- Necoechea and D. Mota-Rojas
  During lactation the sow generally remains anestrus. However, lactational estrus and ovulation sometimes occurs under unusual circumstances. Practical outcomes of lactational estrus are reducing the interval between weaning and estrusand therefore the non-productive days in the herd. Although various techniques to induce lactational estrus have been performed through natural management of the animals or the use of exogenous hormones during lactation, induction of estrus during lactation has not been recommended for commercial use. The objective of this study was to review and analyze the basic lactating sow physiology and the different methodologies to induce lactational ovulation, in order to improve her reproductive and productive performance, as a possible alternative to the early weaning system, especially in those cases where lactation length is determined by welfare constraints.
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