Ruth Escamilla-Montes

Effect of Pediococcus sp., Pediococcus pentosaceus, inulin and fulvic acid, added to the diet, on growth of Oreochromis niloticus

Lactic acid bacteria (LAB) were isolated from the intestine of Oreochromis niloticus and its effect, along with that of inulin and fulvic acid, on growth of the same species was determined. Characterization of the isolates was performed through assessing the Gram stain, morphology, cell arrangement, hemolytic activity, antagonism, growth, hydrophobicity, extracellular enzyme activity, and counting of colony forming units (CFU), to select those microorganisms with probiotic potential. The selected isolates were identified at the molecular level by the amplification of 23S and 5S ribosomal genes. Treatments were performed in triplicate in plastic tanks with 600 l of filtered fresh water and 12 fish per tank (1.3 ± 0.12 g):

Ecology, Fishery and Aquaculture in Gulf of California, Mexico: Pen Shell Atrina maura (Sowerby, 1835)

The pen shell Atrina maura bears economic importance in northwest Mexico. This chapter considers a review on diverse ecology, fishery, and aquaculture topics of this species, carried out in northwest Mexico. In ecology, biology, abundance, spatial prospecting, sex ratio, size structure, reproductive cycle, first maturity sizes, variation of gonadosomatic indexes and growth are discussed. In fishery, the information analysed corresponds to the structure of the organisms in the banks susceptible to capture, institutional and ecological interaction for fishing regulation, evaluation of fishing effort, improvement in fishing performance using the knowledge and attitudes of the fishermen on fisheries policies in the Gulf of California, resilience and collapse of artisanal fisheries and public politics. In aquaculture, they are long-line culture, bottom culture, reproductive cycle, growth, production of larvae and seeds, biochemistry of oocytes, nutritional quality of the muscle, evaluation of diets based on microalgae, immunology in larval and juvenile and probiotic use. The present work shows a status based on information published in theses and articles indexed 15 years ago to the date on the ecology, fishery and aquaculture in the pen shell Atrina maura carried out in the lagoon systems of northwest Mexico.