scholarly journals Arthropods associated with the crown of Mauritia flexuosa (Arecaceae) palm trees in three different environments from Brazilian Cerrado

2006 ◽  
Vol 35 (3) ◽  
pp. 302-312 ◽  
Author(s):  
Rodrigo Gurgel-Gonçalves ◽  
Alexandre R.T. Palma ◽  
Paulo C. Motta ◽  
Maria E. Bar ◽  
Cesar A.C. Cuba
Keyword(s):  
Brazilian Cerrado ◽  
Palm Trees ◽  
Mauritia Flexuosa

Tents and harems: apparent defence of foliage roosts by tent-making bats

1996 ◽  
Vol 12 (1) ◽  
pp. 121-137 ◽  
Author(s):  
Thomas H. Kunz ◽  
Gary F. McCracken
Keyword(s):  
Social Organization ◽  
Adult Male ◽  
West Indies ◽  
Leaf Morphology ◽  
Leaf Width ◽  
Patchy Distribution ◽  
Palm Trees ◽  
Artibeus Jamaicensis ◽  
Mauritia Flexuosa ◽  
Sabal Mauritiiformis

ABSTRACTPalmate umbrella tents used by tent-making bats in Trinidad, West Indies, were observed in three species of Neotropical palms, Sabal mauritiiformis, Coccothrinax barbadensis and Mauritia flexuosa. Tents were most common in palm leaves that have supporting petioles angled at 50–70° above the horizontal. The shape and volume of tents is influenced mostly by leaf morphology (leaf width and leaflet length) and age of the tent. Tent-crowns varied from being heart-shaped in S. mauritiiformis, oval or round in C. barbadensis and spade-shaped in M. flexuosa. Leaves in which tents were constructed were most often beneath overhanging vegetation, and were generally free of vegetation below, allowing bats to enter and depart from tents without being impeded by the clutter of adjacent vegetation.Singles and small apparent harem groups of two bat species, Artibeus jamaicensis and Uroderma bilobatum, were captured and observed in tents made from the leaves of S. mauritiiformis and C. barbadensis. No bats were observed in tents constructed in leaves of M. flexuosa. The apparent harem social organization in these and other tent-making bat species suggests that leaves modified into tents may provide critical and defendable resources that promote the evolution of polygyny. This hypothesis is based on the observed patchy distribution of suitable palm trees, the inappropriateness of many palm leaves as potential tents and the resultant architecture provided by palmate umbrella tents. We suggest that tent-making is an adult male behaviour.

scholarly journals Chemical composition and acaricidal activity of seed oils of the palms Mauritia flexuosa and Mauritiella armata in Rhipicephalus microplus (Ixodidae)

2021 ◽  
Vol 10 (13) ◽  
pp. e167101321078
Author(s):  
Geisa Simone Caldeira Santos ◽  
Franciellen Morais-Costa ◽  
João Carlos Gomes Figueiredo ◽  
Juliana Pimenta Cruz ◽  
Sônia Ribeiro Arrudas ◽  
...  
Keyword(s):  
Palmitoleic Acid ◽  
Impact Ionization ◽  
Integrated Control ◽  
Larval Mortality ◽  
Rhipicephalus Microplus ◽  
Economic Losses ◽  
Chemical Compositions ◽  
Promising Alternative ◽  
Palm Trees ◽  
Mauritia Flexuosa

Rhipicephalus microplus is responsible for considerable economic losses in tropical and subtropical regions. Plant compounds have been utilized as alternative to conventional acaricids. The objective in this study was to evaluate the effects of fixed oils extracted from seeds of Mauritia flexuosa and Mauritiella armata, palm trees typical of the Brazilian Cerrado on tick R. microplus.The fixed oils were used against engorged females and larvae by biocarrapaticidograms and larval mortality by larval pack tests (LPT). Chemical compositions of the oils were evaluated by gas chromatography using an electron impact ionization detector and showed the presence of the compounds: palmitoleic acid, linoleic acid, palmitic acid, and myristic acid. In the biocarrapaticidogram, the oil from M. flexuosa and M. armata at 5% and 10% concentrations showed efficacies > 80%. Regarding the effect of fixed oils from palm trees on R. microplus larvae, mortality above 80% was observed at all concentrations tested.These bioproducts are a promising alternative for controlling this tick and may be adapted into current integrated control methods for cattle farming.

scholarly journals STRUCTURE OF NATURAL REGENERATION IN RELATION TO SOIL PROPERTIES AND DISTURBANCE IN TWO SWAMP FORESTS

CERNE ◽  
2016 ◽  
Vol 22 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Marly Antonielle Ávila ◽  
Saimo Reblleth Souza ◽  
Maria das Dores Magalhães Veloso ◽  
Rubens Manoel Santos ◽  
Luiz Arnaldo Fernandes ◽  
...  
Keyword(s):  
Natural Regeneration ◽  
Anthropogenic Impacts ◽  
Similarity Index ◽  
Soil Nutrient ◽  
Anthropogenic Pressure ◽  
Palm Trees ◽  
Mauritia Flexuosa ◽  
Environmental Protection Area ◽  
Protection Area ◽  
Study Sites

ABSTRACT Veredas (palm swamps) is a type of vegetation associated with watercourses, characterized by the presence of Mauritia flexuosa palm trees. These systems are not well understood and suffer from high anthropogenic pressure. The aims of this study were to describe the natural regeneration of two swamp forests in vereda systems with different anthropogenic impacts and investigate if the variation in these plant communities are associated to edaphic conditions. The study was performed in preserved and impacted sites located in the Environmental Protection Area of the Pandeiros River in northern Minas Gerais. At each site, one hundred 25 m2 plots were established for surveying regenerating shrubs and trees (≥1 cm diameter at the base of the stem and < 3 cm diameter at breast height). Vegetation structure was evaluated by phytosociological parameters, similarity index, and size distribution of individuals. Regenerating strata was correlated with chemical and physical soil analyses. The vegetation at the preserved site was characterized by a higher number of individuals and a lower diversity but contained species that were typical of flooded areas. The results also showed differences in soil nutrient availability between sites that influenced the distribution of species at the two study sites.

A new genus and five new species of Eriophyoidea (Prostigmata) associated with palm trees from Brazilian Amazon

Zootaxa ◽  
2005 ◽  
Vol 1078 (1) ◽  
pp. 41 ◽  
Author(s):  
DENISE NAVIA ◽  
CARLOS H.W. FLECHTMANN
Keyword(s):  
New Species ◽  
New Genus ◽  
Brazilian Amazon ◽  
Elaeis Oleifera ◽  
Palm Trees ◽  
Mauritia Flexuosa ◽  
Eriophyoid Mites ◽  
The Family ◽  
Two New Species ◽  
Three New Species

A new genus and five new species of eriophyoid mites associated with native palm trees (Arecaceae) are described from Brazilian Amazon. The new genus and two new species are in the family Eriophyidae: Euterpia fissa n. gen. & n. sp. from Euterpe precatoria and Notostrix spinula n. sp. from Mauritia flexuosa. Three new species belong to the family Phytoptidae: Palmiphytoptus barbosae n. sp. from Astrocaryum acaule; Propilus alternatus n. sp. from Mauritia flexuosa and Propilus tavaresi n. sp. from Elaeis oleifera.

Sampling Rhodnius neglectus in Mauritia flexuosa palm trees: a field study in the Brazilian savanna

2003 ◽  
Vol 17 (3) ◽  
pp. 347-350 ◽  
Author(s):  
R. Gurgel-Goncalves ◽  
A. R. T. Palma ◽  
M. N. A. Menezes ◽  
R. N. Leite ◽  
C. A. C. Cuba
Keyword(s):  
Field Study ◽  
Brazilian Savanna ◽  
Palm Trees ◽  
Mauritia Flexuosa

scholarly journals Additions and Corrections - Refining of Buriti Oil (Mauritia flexuosa) Originated from the Brazilian Cerrado: Physicochemical, Thermal-Oxidative and Nutritional Implications

2014 ◽  
Author(s):  
Jailane de Souza Aquino ◽  
Débora C. N. de Pontes Pessoa ◽  
Kassandra de Lourdes G. V. Araújo ◽  
Poliana S. Epaminondas ◽  
Alexandre Ricardo P. Schuler ◽  
...  
Keyword(s):  
Brazilian Cerrado ◽  
Mauritia Flexuosa ◽  
Buriti Oil

scholarly journals Infestation of Palm Trees by Triatomines (Hemiptera: Reduviidae) in the State of Bahia, Brazil

2012 ◽  
Vol 5 (3) ◽  
pp. 227-231 ◽  
Author(s):  
Rodrigo Gurgel-Gonçalves ◽  
Gilmar Ribeiro Júnior ◽  
Eraldo Medeiros da Costa Neto
Keyword(s):  
Urban Areas ◽  
Elaeis Guineensis ◽  
Natural Infection ◽  
The State ◽  
Palm Trees ◽  
Mauritia Flexuosa ◽  
Triatoma Sordida ◽  
Palm Species ◽  
Elaeis Guineensis Jacq ◽  
Suitable Habitats

Palm trees play important roles as breeding and foraging habitats for sylvatic triatomines, vectors of Chagas disease. The occurrence of triatomines in peridomestic palm trees may increase the risk of invasion in households and should therefore be considered to develop prevention strategies. In order to investigate the infestation of palm trees by triatomines in the state of Bahia and to determine their natural infection with Trypanosoma spp., we sampled 183 palms in 12 municipalities between 2006 and 2011 using manual capture and/or mouse-baited adhesive traps. Triatomines were detected in 79 palms (43%) such as Copernicia prunifera, (Mart.) Becc., Mauritia flexuosa L. and Attalea spp. (Attalea burretiana Bondar or Attalea salvadorensis Glassman). In other palm species (Syagrus coronata (Mill) H.E. Moore, Attalea funifera Mart ex. Spreng, and Elaeis guineensis Jacq) triatomines were not detected. Rhodnius neglectus Lent, Triatoma sordida (Stål), and Triatoma pseudomaculata Corrêa & Espínola occurred in C. prunifera along the São Francisco River. In western Bahia, R. neglectus and Psammolestes tertius Lent & Jurberg were detected in M. flexuosa, while Triatoma tibiamaculata (Pinto) occurred in Attalea sp. in urban areas of Salvador on the coast of Bahia. Overall, 180 triatomines were captured, mainly R. neglectus. T. tibiamaculata had the highest rate of natural infection (61%). The results indicate that at least three species of palms are suitable habitats for triatomines in the state of Bahia and occur in peridomestic environment, what may enhance the probability of triatomine invasion into houses. Infestação de Palmeiras por Triatomíneos (Hemiptera: Reduviidae) no Estado da Bahia, Brasil Resumo. As palmeiras desempenham papéis importantes como habitats de reprodução e alimentação para triatomíneos silvestres, vetores da doença de Chagas. A ocorrência de triatomíneos em palmeiras peridomiciliares pode aumentar o risco de invasão desses insetos em domicílios e deve ser considerada para desenvolver estratégias de prevenção. Com objetivo de investigar a infestação de palmeiras por triatomíneos no Estado da Bahia e determinar a infecção natural desses insetos por Trypanosoma spp., foram amostradas 183 palmeiras em 12 municípios entre 2006 e 2011 utilizando captura manual e/ou armadilhas adesivas iscadas com camundongos. Os triatomíneos foram detectados em 79 palmeiras (43%) das espécies Copernicia prunifera (Mart.) Becc., Mauritia flexuosa L. e Attalea spp. (Attalea burretiana Bondar ou Attalea salvadorensis Glassman). Em outras espécies de palmeiras (Syagrus coronata (Mill) H.E. Moore, Attalea funifera Mart ex. Spreng e Elaeis guineensis Jacq) não foram detectados triatomíneos. Rhodnius neglectus Lent, Triatoma sordida (Stål), e Triatoma pseudomaculata Corrêa & Espínola ocorreram em C. prunifera ao longo do rio São Francisco. No extremo oeste da Bahia, R. neglectus e Psammolestes tertius Lent & Jurberg foram detectados em M. flexuosa, enquanto Triatoma tibiamaculata (Pinto) ocorreu em Attalea sp. em áreas urbanas de Salvador. No total, 180 triatomíneos foram capturados, principalmente R. neglectus. A maior taxa de infecção natural (61%) foi observada em T. tibiamaculata. Os resultados indicam que pelo menos três espécies de palmeiras são habitats favoráveis para triatomíneos no estado da Bahia e ocorrem no ambiente peridomiciliar, o que pode aumentar a probabilidade de invasão de triatomíneos nas casas.

scholarly journals Mauritia flexuosa palm trees airborne mapping with deep convolutional neural network

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Luciene Sales Dagher Arce ◽  
Lucas Prado Osco ◽  
Mauro dos Santos de Arruda ◽  
Danielle Elis Garcia Furuya ◽  
Ana Paula Marques Ramos ◽  
...  
Keyword(s):  
Neural Network ◽  
Convolutional Neural Network ◽  
Tree Species ◽  
Single Species ◽  
Absolute Error ◽  
Palm Tree ◽  
Forest Environment ◽  
Individual Tree ◽  
Palm Trees ◽  
Mauritia Flexuosa

AbstractAccurately mapping individual tree species in densely forested environments is crucial to forest inventory. When considering only RGB images, this is a challenging task for many automatic photogrammetry processes. The main reason for that is the spectral similarity between species in RGB scenes, which can be a hindrance for most automatic methods. This paper presents a deep learning-based approach to detect an important multi-use species of palm trees (Mauritia flexuosa; i.e., Buriti) on aerial RGB imagery. In South-America, this palm tree is essential for many indigenous and local communities because of its characteristics. The species is also a valuable indicator of water resources, which comes as a benefit for mapping its location. The method is based on a Convolutional Neural Network (CNN) to identify and geolocate singular tree species in a high-complexity forest environment. The results returned a mean absolute error (MAE) of 0.75 trees and an F1-measure of 86.9%. These results are better than Faster R-CNN and RetinaNet methods considering equal experiment conditions. In conclusion, the method presented is efficient to deal with a high-density forest scenario and can accurately map the location of single species like the M. flexuosa palm tree and may be useful for future frameworks.

scholarly journals TEMPERATURE, LIGHT, AND DESICCATION TOLERANCE IN SEED GERMINATION OF Mauritia flexuosa L.F.

2018 ◽  
Vol 42 (3) ◽  
Author(s):  
Lívia Caroline Praseres de Almeida ◽  
Kathia Fernandes Lopes Pivetta ◽  
Renata Gimenes ◽  
Gustavo de Nobrega Romani ◽  
Marcos Vieira Ferraz ◽  
...  
Keyword(s):  
Seed Germination ◽  
Desiccation Tolerance ◽  
Polynomial Regression ◽  
Germination Rate ◽  
Ornamental Plants ◽  
Effect Of Temperature ◽  
Randomized Experiments ◽  
Light Regimes ◽  
Palm Trees ◽  
Mauritia Flexuosa

ABSTRACT Palm trees are widely used as ornamental plants, besides its sustainability and industry aspects. These plants are commercially propagated via seeds. Due to its importance and the need for seed germination information, this study aimed to verify the effect of temperature, light regimes, and desiccation tolerance on germination of Mauritia flexuosa L.f. For that, two completely randomized experiments were carried out. The first consisted of treatments arranged in a 6 x 2 factorial scheme, testing six temperatures (20, 25, 30, 35, 20-30, and 25-35 ºC) and light presence and absence. The second comprised five seed water contents (51, 48, 45, 30, and 26%) for desiccation tolerance evaluations. Water content measurements were made every three days, from a sample lot maintained at room temperature. In both trials, each treatment was composed of four replicates with 25 seeds per plot. Germination rate (GR) and germination speed index (GSI) were calculated, and the data were analyzed by analysis of variance (ANOVA). Temperature and light means were compared by the Tukey’s test (p < 0.05), and the desiccation ones by a polynomial regression. The highest GR was observed at 20-30 ºC, regardless of light presence. Moreover, M. flexuosa seeds were sensitive to desiccation.

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