The present work evaluated the effect of the dietary inclusion of Chlorella peruviana on the growth parameters and increase curves of the length-weight relationship of Colossoma macropomum fry. Four diets were prepared with different levels of addition of C. peruviana (0%, 2.5%, 5% and 7.5%). A total of 180 fingerlings with length and initial weight of 4.03 ± 0.62cm and 1.94 ± 0...
The search for insecticidal plant compounds is one of the strategies for the control of species such as Spodoptera frigiperda, a polyphagous species considered a sporadic pest of important crops. The objective of this work was to evaluate the biocidal effect of Melia azedarach (Meliaceae) leaf and seed extracts on S. frugiperda (Lepidoptera: Noctuidae) larvae, assuming that the...
Cape “gooseberry” Physalis peruviana L. is a Solanaceae of great economic importance due to the high nutritional value of its fruits. It is known that the use of a good NPK fertilization scheme allows to achieve increases in the content of nutrients such as proteins. The objective of this work was to determine the effect of different doses 160-50-160; 225-70-275; 300-100-450 of...
The main objective of this research was evaluated antifungal effect of aqueous extract of Plantago major L. "llantén" on pathogen Lasiodiplodia theobromae (Pat.) Griffon & Maubl pathogen growth under laboratory conditions. The increase phytosanitary problems led scientists to develop strategies and methodologies to avoid crop losses, therefore diversus investigations are being...
The Huasochugo archaeological center extends over 5 km2, on the crest of three ledges and plains of the hill of the same name, on the left bank of the La Vega river, Shulgán hamlet, Huaso district, Julcán province, La Libertad region, Peru (3,739 masl and 8°16'15.03''S 78°27'55.03''W). It presents cultural (extension, edged stone architecture and planning) and natural importance...
In order to provide updated information on the progress in the recovery process of El Ferrol bay due to contamination and erosion, a documentary review and description is made based on recent visits to the ecosystem. There is a Plan for environmental recovery proposed by the Multisectoral Technical Commission in 2011, which since 2012 has been managed by the Multisectoral Working...
Birds are the most diverse group of vertebrates, who through flight can move small to long distances, however their distributions can be constrained by environmental variables such as temperature and precipitation which change with altitude in the Andes. The objective of the study was to determine the richness and abundance of birds for vegetation types across an altitude...
The search for life on other planets is one of the most important scientific challenges of this century, centered mainly on Mars. The Atacama Desert is one of the places on the planet with an environment similar to the red planet, with a hyper-arid core that constitutes an extreme environment and scarce life, due to environmental factors. At the moment it has not been possible to...
Lead is a heavy metal that, due to its physicochemical properties, defines it as a bioaccumulative, persistent and toxic contaminant in soil and water bodies. Bioremediation is a sustainable and ecological alternative for the removal of this contaminant. Microorganisms such as Spirulina platensis and Pseudomonas aeruginosa are widely used for their ability to bioadsorb lead...
Live food produced by Biofloc was investigated in the rearing of Oreochromis aureus at the SL04LA04 Aquaculture Laboratory-Fisheries Department of the National University of Trujillo in 2021. Biofloc production was carried out in 1 m3 culture systems. Two treatments with different carbon sources T5-molasses and T6-banana flour and a nitrogen source with an aeration system under...
The availability of potential marine fish seeds for Mariculture in the ecosystem of Puerto Salaverry in 2020 was investigated. They were carried out in the summer and spring seasons, the coastline of the beach between the breakwaters was 200 m. The surface temperature of the sea, salinity, and pH were recorded, then an average of four runs was made to obtain the plankton with 70...
The bioinsecticidal effect of mutant Bacillus thuringiensis H-14 var israelensis (Bti) on Aedes aegypti III larvae was evaluated by exposing them to three concentrations of the mutant Bti (16 560, 33 120 and 66 240 esp/mL), each treatment had 25 larvae in stage III of A. aegypti, which were exposed to different concentrations of mutant Bti and a control group. Bioassays between A...
The present study is based on the determination of the wild flora with emphasis on species categorized as threatened developed in the Conservation and Ecotourism Center of the National University of San Martín, located in the Regional Conservation Area “Cordillera Escalera”, in the San Martín region. Martín, Peru, being of academic interest to have information on the species that...
The production of microbial biomass in the world has undergone many changes during the last two decades and several processes have been developed for the production of biomass loaded with useful microorganisms as sources of protein for food. In the present investigation, agroindustrial lignocellulosic residues such as “brácteas” of Cynara scolymus var. lorca, "peladilla" of...
Currently the inappropriate use of agrochemicals has generated negative impacts in the agricultural and environmental sector, due to this the influence of the different concentrations of the “biol” in the growth and development of Medicago sativa (Fabaceae) “alfalfa” was evaluated for which five treatments made up of five 1m2 patches of Medicago sativa “alfalfa”; they were...