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The aim of this research was to study the effects of seasons (rainy and dry) on the composition of the fatty acids (FAs) in milk of Creole goats in a semiintensive production system. Milk sampling was carried out in the dry season (June) and just after the rainy season (November) in an arid region of Baja California Sur, Mexico. The goat diet was composed of native species it grazed on in the rangeland, as well as hayed forages with some supplements containing approximately equal amounts of sorghum and maize. The results for different types of FAs in goat milk showed that there were no significant differences in saturated, polyunsaturated, branched, and omega-6 FAs, with differences for monounsaturated and omega-3 FAs. In terms of individual FAs, the majority of changes were not significant. The FA constituents showed that significant differences existed for C12:0, C23:0, C14:1 n-5, C14:1 n-7, C18:1 n-9, C18:3 n-3 cis, C22:5 n-3, and C22:6 n-3, and 2 branched fatty acids, C12:0 iso and C15:0 anteiso. The rest showed a trend of higher quantities of FAs during the rainy season, but it was not significant. In conclusion, goat milk quality as measured by FAs is for the most part very similar year round, independent of seasons in this semiintensive production system. [ABSTRACT FROM AUTHOR]

A vegetal species on great scale appears as an alternative for the essential fatty acid production in human nutrition, for that reason the fatty acid composition receives special importance. Salicornia bigelovii is an halophyte that developed in arid and coastal zones like Sonora state and the peninsula of South Baja California, Mexico. It could be an alternative species in the eatable oil production. The similar fixation of N2 by bacteria associated with roots of Salicornia bigelovii and halophyte are an important nitrogen source available in coastal ecosystems. The inoculation of Klebsiella pneumoniae and Azospirillum halopraeferens was evaluated during the vegetative development of Salicornia bigelovii under field conditions in two genotypes (wild genotype and cultivar SOS-10), having affected positively variable as weight, length of plants, yields of production and biochemical characteristics and contained total of ashes, protein and total lipids in seed produced. Our results suggest that both genotypes of S. bigelovii, under the conditions field used, can be improved with the application of K. pneumoniae and A. halopraeferens, showing a potential utility for agricultural producers of coastal semi-arid zones. [ABSTRACT FROM AUTHOR]