Is describe and illustrated Armatocereus cologonus y Opuntia macbridei (Cactaceae) two fruits from Andes of Peru. Armatocereus oligogonus Rauh & Backeb. is found Lambayeque region and La Libertad region, Peru, between 300-2000 m de elevation, its fruits are exquisite edibles. Opuntia macbridei Britton & Rose grows in Amazonas, Piura, Cajamarca, La Libertad, Ancash and Apurimac...
Our objective was to recognized the natural and cultural diversity of the Archaeological Complex (AC) of Narihuala, Piura region, Peru. We performed ten visits to the complex between may and june 2023. We applied specific methodologies for archaeological recognition, botanical collections and bird diversity identification, applying the transect and intensive search methods...
Jaltomata calliantha S. Leiva & Mione (Solanaceae) is described and illustrated. This species has white fruits and is endemic to Salpo, La Libertad region, Peru. It lives above Platanar (Platanar-Pagash and Platanar-Salpo routes, and, above the Casmiche bridge), Salpo district, prov. Otuzco, La Libertad region, Peru, among the 1425-1870 m elevation, between 8º 00' 86"- 8º 00' 790...
This paper reports a new locality of Sagittaria guayanensis Kunth (Alismataceae) in southern Peru, providing data on its distribution and phytosociology.Keywords : Amazonia; Alismataceae; aquatic plant communities; Peru; Sagittaria.
Geometric morphometry abstracts the shape of organisms by using reference points, quantifies and analyzes the morphological variation of different species. The objective of this work was to determine the population structure of wild bees Apis mellifera L. from Trujillo, Laredo, Casa Grande and Viru, by means of principal component analysis; samples of nurse worker bees were...
Dinophysis species causing various proliferations are part of the episodes of toxic microalgae, which generate a large negative impact on human health, marine ecosystems and related economic activities. In this paper we present the relationship of the toxicity of gender Dinophysis in mariculture of Guaynuna bay during 2015, through certain cell concentrations and toxicity testing...
The main objective of the research is to identify the microscopic characters of the starch granule of the species Phaseolus vulgaris "bean" and Phaseolus lunatus "pallar" (Fabaceae), such as the shape, the hilum, the laminate, the fissure and the extinction cross. Eight seed samples were used, eight varieties of beans, such as caballero, canario, black bean, garbancillo, ñuña...
The objective of this investigation was to evaluate the technology proposal for a process of generating electrical energy from the residues of the forest exploitation of the Macurijes Agroforestry Company. For which a proposal for steam boiler technology is analyzed based on the potential of standing forest biomass and forest residues, as well as an analysis of the feasibility of...
Tissue regeneration is a subject that continues to demand new proposals from the academy that further improve what has been advanced to date. The objective of this study was to determine the effect of four concentrations of Maytenus laevis (Reissek) Biral (Celastraceae) (0g/L, 1g/L, 2g/L and 4g/L) on the regeneration of Girardia festae. A completely randomized experimental design...
The Spodoptera frugiperda larvae are highly damaging to different crops. Its eradication requires the use of different compounds including secondary metabolites. Therefore, this research was performed to evaluate the biocidal effect of the ethanolic extract of Carica papaya (Caricaceae) seed on larvae of stage I of S. frugiperda. The larvae of S. frugiperda in stage I were...
Lactuca sativa L. (Asteraceae) is a vegetable of high nutritional and economic importance. Its crop is developed in hydroponic conditions in which the yield is affected by the type of substrate employed in the first stages of growth. The objective of this research is to evaluate the root weight in two lettuce varieties under three different types of substrates. The results...
Beneficial microorganisms tend to promote growth and development of Carica papaya at different levels. The objective of this study was to evaluate the effect of Rhizophagus irregularis and Trichoderma viride on C. papaya growth under greenhouse conditions for 28 days. C. papaya plantlets obtained through micropropagation were used after acclimation. Each plantlet received a...
Inadequate fertilization affects the production of quality seedlings, because they need a balanced balance of essential nutrients, in the concentrations required to grow properly. With the above, it was proposed to determine the effect produced by fertilizers calcium triple superphosphate, ammonium nitrate and potassium nitrate fertilizers on the variables number of leaves, plant...
Miconia Ruiz & Pavón is currently recognized as a single genus belonging to the Miconieae tribe, whose taxonomic position is in urgent need of new multidisciplinary studies, including the anatomical investigation of fruits and seeds. Our study investigated the structural ontogeny of fruits and seeds of six species of Miconia, from the floral phase. Flowers and developing fruits...
We present the first document on Asteraceae cultivated in Peru, with 53 species in 37 genera. 44 species are introduced from Asia, Mesoamerica, Europe, Africa and Australia, and only nine are native to South America. Seven species are new records for the Peruvian flora. The species are mostly of herbaceous habit and categorized as ornamental.Keywords : Useful plants; cultivated...
In this paper we describe the vegetation of Yura and its surroundings using the Braun-Blanquet phytosociological method. As a result, we report 3 new associations (Equiseto gigantei-Escallonietum angustifoliae, Pohlio longicollis-Rhodoscirpetum yurensis and Atriplici myriophyllae-Mesembryanthemetum crystallini) and 3 new alliances (Muehlenbeckio fruticulosae-Helogynion stramineae...
The following new taxonomic combination is proposed: Deprea macrocalyx (Physalideae, Solanaceae).Keywords : Deprea; new combination.
The new species Noticastrum sanchezvegae for the paramo of northern Peru, from the department of Cajamarca, is described and illustrated. For this purpose, the differential characters with respect to N. macbridei Cuatrec. from central Peru are indicated, and a new key is given for the 21 species described in South America. N. sanchezvegae is distinguished from the rest of the...
The sexual maturity of Oreochromis aureus was investigated and the elaboration of a protocol for use in rural aquaculture in the La Balsa Module in San Ignacio, Cajamarca-Peru. The evaluation of the sexual maturity of the tilapias was carried out in March and April 2022, considering the external and internal phenotypic characteristics of the gonads, the presence of eggs and...
The research on the experimental growth of Oreochromis aureus at different photoperiods in a closed system was carried out in Trujillo, Peru at the Aquaculture Laboratory of the Universidad Nacional Trujillo. The seed was obtained from the La Balsa Module and the experimental growth of O. aureus was evaluated with three photoperiod treatments T1-24: 0, T2-12: 12, and T3...
The present study aimed to determine the different types of parasites in muscle tissue and organs analyzed in fish for human consumption from the Mercado Mayorista de Buenos Aires, Trujillo, La Libertad, Peru during the year 2019, in eight species of marine fishes: Mugil cephalus "mullet fish”, Sciaena deliciosa “lorna fish”, Scomber japonicus “mackerel fish”, Sarda chiliensis...
Peru evidences one of the main environmental problems and this refers to mining, metallurgical and industrial contamination basically by heavy metals such as copper, zinc, iron, cadmium, lead, mercury and others, these compounds can reach various bodies of water by leaching or runoff. Fish have the capacity to store in their organism a higher concentration of these compounds...
Valeriana rigida Ruiz & Pav. (Caprifoliaceae) is an American species, used in traditional medicine as a sedative or sleeping pill. The medicinal use of the resource has led to indiscriminate and unsustainable depredation, mainly due to anthropogenic action. In the high Andean zones of northern Peru (2500-4500 m.a.s.l.), extraction from its natural habitat is neither controlled...
Based on comparison of literature and herbarium sheets, the new variety Rhodoscirpus asper (J. Presl & C. Presl) Léveillé-Bourret, Donadío & J. R. Starr var. yurensis var. nov. is described for the populations on rocky fissures with hanging leaves from the canyon of La Paccha ravine (Yura, Arequipa, Peru).Keywords : Arequipa; Cyperaceae; Flora; Peru; Rhodoscirpus.
The Tropical Peruvian Andes host a great ecosystem diversity such as the montane cloud forest at the southern east slopes. The subaerial moist habitats along the Alccamayo creek belong to Aguas Calientes, Cusco . They were evaluated in winter (august 2017) between 2184 and 3000 m of elevation with the mean temperature between 16 and 18°C. In the southern highland Andean, the...