cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.5670925
title: REVISITING THE SIZE EFFECT IN THE BOVESPA

description: ABSTRACT The size effect has been analyzed in numerous stock markets using different approaches. However, there are few studies focused on its practical applicability. In this context, the aim of this study is two-fold. First, we examine price and volatility linkages among large, medium, and small firms employing a multivariate VAR-BEKK model. Second, we provide the out-of-sample performance of optimal portfolios constructed on the basis of time-varying return and volatility forecasts from this specification approach. Our overall results show that optimal portfolios are primarily composed of medium and small firms. Moreover, our findings reveal that using this technique, it is possible to reduce risk and outperform the naïve rule, which is usually employed by foreign investors interested in the Brazilian stock market. These findings are relevant not only for academics but also for practitioners because it is important an in-depth knowledge of stock market patterns in order to develop correct trading strategies.
DOI: 10.6084/m9.figshare.5670925.v1
title: REVISITING THE SIZE EFFECT IN THE BOVESPA

description: ABSTRACT The size effect has been analyzed in numerous stock markets using different approaches. However, there are few studies focused on its practical applicability. In this context, the aim of this study is two-fold. First, we examine price and volatility linkages among large, medium, and small firms employing a multivariate VAR-BEKK model. Second, we provide the out-of-sample performance of optimal portfolios constructed on the basis of time-varying return and volatility forecasts from this specification approach. Our overall results show that optimal portfolios are primarily composed of medium and small firms. Moreover, our findings reveal that using this technique, it is possible to reduce risk and outperform the naïve rule, which is usually employed by foreign investors interested in the Brazilian stock market. These findings are relevant not only for academics but also for practitioners because it is important an in-depth knowledge of stock market patterns in order to develop correct trading strategies.
DOI: 10.6084/m9.figshare.5670919
title: Agro-morphological characterization and genetic divergence assessment in bush snap bean genotypes1

description: ABSTRACT The characterization and identification of genetically divergent parents for crosses are important tasks in snap bean breeding programs, for a greater availability of cultivars to growers. This study aimed at characterizing bush snap bean genotypes originating from different countries; assessing the genetic divergence between the genotypes and the genetic variability extent, concerning 12 agro-morphological traits; and determining the relative importance of these traits for the genetic divergence. The experiment was conducted in a randomized complete block design, with 29 genotypes and four replications. The UPGMA and Tocher optimization methods, both based on the generalized distance of Mahalanobis, and the canonical variables method were used to analyze the genetic divergence. The genotypes exhibited a wide range of genetic variability for the agro-morphological traits evaluated, mainly for 100-seed weight, aspect and yield of commercial pods, plant height at harvest and pod weight. A high genetic divergence was detected between the genotypes, in which the 100-seed weight and aspect of commercial pods were the most important traits for clustering. Some genotypes own desirable characteristics for these and other traits, given the favorable genetic associations between traits. The snap bean genotypes originated from different countries tended to cluster together, indicating that similar germplasm is shared among different countries, thus suggesting a strong trans-national seed exchange.
DOI: 10.6084/m9.figshare.5670919.v1
title: Agro-morphological characterization and genetic divergence assessment in bush snap bean genotypes1

description: ABSTRACT The characterization and identification of genetically divergent parents for crosses are important tasks in snap bean breeding programs, for a greater availability of cultivars to growers. This study aimed at characterizing bush snap bean genotypes originating from different countries; assessing the genetic divergence between the genotypes and the genetic variability extent, concerning 12 agro-morphological traits; and determining the relative importance of these traits for the genetic divergence. The experiment was conducted in a randomized complete block design, with 29 genotypes and four replications. The UPGMA and Tocher optimization methods, both based on the generalized distance of Mahalanobis, and the canonical variables method were used to analyze the genetic divergence. The genotypes exhibited a wide range of genetic variability for the agro-morphological traits evaluated, mainly for 100-seed weight, aspect and yield of commercial pods, plant height at harvest and pod weight. A high genetic divergence was detected between the genotypes, in which the 100-seed weight and aspect of commercial pods were the most important traits for clustering. Some genotypes own desirable characteristics for these and other traits, given the favorable genetic associations between traits. The snap bean genotypes originated from different countries tended to cluster together, indicating that similar germplasm is shared among different countries, thus suggesting a strong trans-national seed exchange.
DOI: 10.6084/m9.figshare.5670907
title: Description of the soil and root biomass of two subtropical mangroves in Antonina and Guaratuba Bay, Paraná State, Brazil

description: ABSTRACT The soil of the mangroves influences the root anchorage and the nutrition processes of the plant community. This study evaluated the relationships among edaphic conditions, volume and biomass of roots, and tree structure of two mangroves in Paraná State. Five soil cores of 50 cm depth were collected from each mangrove for physicochemical analysis. Organosoil thiomorphic salic sodic predominated in Antonina Bay, while in Guaratuba Bay were observed the Gleysoil thiomorphic salic sodic and the Organosoil thiomorphic salic sodic. Fifteen root samples were collected from each mangrove area for root volume and dry mass analysis'?'. The higher values of root mass were found in Guaratuba Bay. The chemical analysis of the soil showed no correlation between biomass and root volume. The high coefficients of variation attested the high heterogeneity in the root distribution in both areas. However, in the Guaratuba Bay, root mass and volume are higher due to the textural composition of the soil and higher tree density.
DOI: 10.6084/m9.figshare.5670907.v1
title: Description of the soil and root biomass of two subtropical mangroves in Antonina and Guaratuba Bay, Paraná State, Brazil

description: ABSTRACT The soil of the mangroves influences the root anchorage and the nutrition processes of the plant community. This study evaluated the relationships among edaphic conditions, volume and biomass of roots, and tree structure of two mangroves in Paraná State. Five soil cores of 50 cm depth were collected from each mangrove for physicochemical analysis. Organosoil thiomorphic salic sodic predominated in Antonina Bay, while in Guaratuba Bay were observed the Gleysoil thiomorphic salic sodic and the Organosoil thiomorphic salic sodic. Fifteen root samples were collected from each mangrove area for root volume and dry mass analysis'?'. The higher values of root mass were found in Guaratuba Bay. The chemical analysis of the soil showed no correlation between biomass and root volume. The high coefficients of variation attested the high heterogeneity in the root distribution in both areas. However, in the Guaratuba Bay, root mass and volume are higher due to the textural composition of the soil and higher tree density.
DOI: 10.6084/m9.figshare.5670904
title: Mechanical properties of the macaw palm fruit-rachilla system1

description: ABSTRACT The fruit of the native macaw palm [Acrocomia aculeata (lacq) Lood. ex Mart] is an alternative for biodiesel production because of the plant characteristics, as well as its adaptability, hardiness and high vegetable oil yield. However, its exploitation remains extractive and there are significant difficulties in its harvest. This study aimed to determine the mechanical properties of the macaw palm fruit-rachilla system that will support the design of harvest machines based on mechanical vibration. Ten samples of four accessions in the immature and mature stages of maturity were used. Traction and vibration tests were conducted to determine the mechanical properties of the macaw palm fruit-rachilla system. The elastic modulus of the rachilla was 188.39-385.09 MPa for the immature stage and 109.02-320.54 MPa for the mature stage. The Poisson's ratio for the rachilla varied between 0.20 and 0.52 for the immature stage and between 0.16 and 0.52 for the mature stage. The damping ratio varied between 0.02 and 0.12 for the immature stage and between 0.06 and 0.12 for the mature stage. The fruit-rachilla system was characterized as underdamped.
DOI: 10.6084/m9.figshare.5670904.v1
title: Mechanical properties of the macaw palm fruit-rachilla system1

description: ABSTRACT The fruit of the native macaw palm [Acrocomia aculeata (lacq) Lood. ex Mart] is an alternative for biodiesel production because of the plant characteristics, as well as its adaptability, hardiness and high vegetable oil yield. However, its exploitation remains extractive and there are significant difficulties in its harvest. This study aimed to determine the mechanical properties of the macaw palm fruit-rachilla system that will support the design of harvest machines based on mechanical vibration. Ten samples of four accessions in the immature and mature stages of maturity were used. Traction and vibration tests were conducted to determine the mechanical properties of the macaw palm fruit-rachilla system. The elastic modulus of the rachilla was 188.39-385.09 MPa for the immature stage and 109.02-320.54 MPa for the mature stage. The Poisson's ratio for the rachilla varied between 0.20 and 0.52 for the immature stage and between 0.16 and 0.52 for the mature stage. The damping ratio varied between 0.02 and 0.12 for the immature stage and between 0.06 and 0.12 for the mature stage. The fruit-rachilla system was characterized as underdamped.
DOI: 10.6084/m9.figshare.5670898
title: FRUIT AND SEED BIOMETRY AND SEEDLING MORPHOLOGY OF Parkia discolor (Spruce ex Benth.)

description: ABSTRACT Parkia discolor (Spruce ex Benth.) is a species of floodplain forest permanently flooded, mainly used in folk medicine and with economic potential. The purpose of this study was to estimate the biometric characteristics of fruits and seeds of Parkia discolor and describe the morphology and development of its seedlings and young plants. On average, fruits have shown the following dimensions: 18.45 cm long with pedicel, 13.25 cm long without pedicel, 4.4 cm wide and 0.66 cm thick mass of 11.91 g. The seeds have shown 1.73 cm long, 0.68 cm wide and 0.39 cm thick mass of 0.38 g. A thousand seeds mass was estimated to be 361.15 g and the number of seeds per kilogram was 2769. The fruits and seeds of these species are preyed by insects of the families Scolytidae, Nitidulidae, Cerambycidae and Bruchidae. Germination is epigeal - phanerocotylar; the seedling presents hypocotyl herbaceous, sessile cotyledons, based split, eophyll compound, paripinnatus with 1-3 pairs of leaflets, most 2 pairs, with the insertion of a spherical gland leaflets, bright green. The young plant has a woody base with 5 eophylls, alternate and presents between 21-26 pairs of foliolums. The use of plastic bags of 900 cm3 was more proper than using a styrofoam tray with "cell" of 125 cm3 for the development of the plants during the period of three months.
DOI: 10.6084/m9.figshare.5670898.v1
title: FRUIT AND SEED BIOMETRY AND SEEDLING MORPHOLOGY OF Parkia discolor (Spruce ex Benth.)

description: ABSTRACT Parkia discolor (Spruce ex Benth.) is a species of floodplain forest permanently flooded, mainly used in folk medicine and with economic potential. The purpose of this study was to estimate the biometric characteristics of fruits and seeds of Parkia discolor and describe the morphology and development of its seedlings and young plants. On average, fruits have shown the following dimensions: 18.45 cm long with pedicel, 13.25 cm long without pedicel, 4.4 cm wide and 0.66 cm thick mass of 11.91 g. The seeds have shown 1.73 cm long, 0.68 cm wide and 0.39 cm thick mass of 0.38 g. A thousand seeds mass was estimated to be 361.15 g and the number of seeds per kilogram was 2769. The fruits and seeds of these species are preyed by insects of the families Scolytidae, Nitidulidae, Cerambycidae and Bruchidae. Germination is epigeal - phanerocotylar; the seedling presents hypocotyl herbaceous, sessile cotyledons, based split, eophyll compound, paripinnatus with 1-3 pairs of leaflets, most 2 pairs, with the insertion of a spherical gland leaflets, bright green. The young plant has a woody base with 5 eophylls, alternate and presents between 21-26 pairs of foliolums. The use of plastic bags of 900 cm3 was more proper than using a styrofoam tray with "cell" of 125 cm3 for the development of the plants during the period of three months.
DOI: 10.6084/m9.figshare.5670895
title: AGE OF STOCK PLANTS, SEASONS AND IBA EFFECT ON VEGETATIVE PROPAGATION OF ILEX PARAGUARIENSIS

description: ABSTRACT The low germination of Ilex paraguariensis seeds and their long reproductive cycle make cuttings propagation a good alternative for its reproduction all year round, enabling to obtain genetically superior clones. Thus, we evaluated the influence of stock plants age, plant growth regulator indole-3-butyric acid (IBA) application and plant material collection in different seasons related to rooting of cuttings. From 12 and over 80-years-old trees shoots cuttings were made in four seasons, treated with IBA hydroalcoholic solution at concentrations of 0, 1500, 3000, 4500 and 6000 mg L-1. The rooting was performed in plastic boxes filled with vermiculite and carbonized rice husk at a ratio of 1:1 (v/v) and, after 90 days in controlled greenhouse conditions were evaluated the rooting percentage, callus formation, survival, mortality, number of roots/cutting and length of three larger roots/cutting. Cuttings from 12-years-old stock plants have higher ability to form adventitious roots and the use of IBA did not increase rooting potential. Autumn proved to be the most favorable season for rooting, followed by spring and winter.
DOI: 10.6084/m9.figshare.5670895.v1
title: AGE OF STOCK PLANTS, SEASONS AND IBA EFFECT ON VEGETATIVE PROPAGATION OF ILEX PARAGUARIENSIS

description: ABSTRACT The low germination of Ilex paraguariensis seeds and their long reproductive cycle make cuttings propagation a good alternative for its reproduction all year round, enabling to obtain genetically superior clones. Thus, we evaluated the influence of stock plants age, plant growth regulator indole-3-butyric acid (IBA) application and plant material collection in different seasons related to rooting of cuttings. From 12 and over 80-years-old trees shoots cuttings were made in four seasons, treated with IBA hydroalcoholic solution at concentrations of 0, 1500, 3000, 4500 and 6000 mg L-1. The rooting was performed in plastic boxes filled with vermiculite and carbonized rice husk at a ratio of 1:1 (v/v) and, after 90 days in controlled greenhouse conditions were evaluated the rooting percentage, callus formation, survival, mortality, number of roots/cutting and length of three larger roots/cutting. Cuttings from 12-years-old stock plants have higher ability to form adventitious roots and the use of IBA did not increase rooting potential. Autumn proved to be the most favorable season for rooting, followed by spring and winter.
DOI: 10.6084/m9.figshare.5670892
title: FLORISTIC COMPOSITION AND PHYTOGEOGRAPHY CONTEXTUALIZATION OF THE NATURAL REGENERATION OF AN ALLUVIAL FOREST LOCATED IN THE "PLANALTO SUL CATARINENSE" REGION, SC, BRAZIL

description: ABSTRACT This study aimed at inventorying the natural regeneration of tree species in an Alluvial Araucaria Forest in the "Planalto Sul Catarinense" region, SC, Brazil; evaluating the dissimilarity between its adult and regenerative components; and verifying the natural regeneration floristic sharing among its different fragments. The regenerative component has been sampled and identified within 48 plots and classified according to the following height classes: Class 1, plants with height varying from 15 cm up to 1 m; Class 2, plants with height varying from 1 and 3 m; and Class 3, plants with height higher than 3 m and DBH (diameter at breast height) smaller than 5 cm. The floristic composition of adult individuals in the area and of regenerative individuals from other fragments has been obtained from the database of the Laboratory of Dendrology of CAV/UDESC. The structure of the regeneration was evaluated by phytosociological descriptors. Dissimilarity between the adult and the regenerative components has been determined by Jaccard, Sorensen and Bray-Curtis distances. The regeneration floristic sharing analysis of different areas was conducted by a dendrogram. A total of 818 individuals belonging to 59 species have been sampled, being Allophylus edulis (A.St.-Hil. et al.) Hieron. ex Niederl. the species with the greatest relative importance. Elevated similarity between the regenerative and adult components have been observed (from 0.24 to 0.43), suggesting a low floristic-structural turnover between components. The area under study have shown a greater floristic connection (&lt;40% of dissimilarity) with other spatially close fragments, indicating that altitude and temperature are important ecological factors for its phyto-geographic compartmentalization.
DOI: 10.6084/m9.figshare.5670892.v1
title: FLORISTIC COMPOSITION AND PHYTOGEOGRAPHY CONTEXTUALIZATION OF THE NATURAL REGENERATION OF AN ALLUVIAL FOREST LOCATED IN THE "PLANALTO SUL CATARINENSE" REGION, SC, BRAZIL

description: ABSTRACT This study aimed at inventorying the natural regeneration of tree species in an Alluvial Araucaria Forest in the "Planalto Sul Catarinense" region, SC, Brazil; evaluating the dissimilarity between its adult and regenerative components; and verifying the natural regeneration floristic sharing among its different fragments. The regenerative component has been sampled and identified within 48 plots and classified according to the following height classes: Class 1, plants with height varying from 15 cm up to 1 m; Class 2, plants with height varying from 1 and 3 m; and Class 3, plants with height higher than 3 m and DBH (diameter at breast height) smaller than 5 cm. The floristic composition of adult individuals in the area and of regenerative individuals from other fragments has been obtained from the database of the Laboratory of Dendrology of CAV/UDESC. The structure of the regeneration was evaluated by phytosociological descriptors. Dissimilarity between the adult and the regenerative components has been determined by Jaccard, Sorensen and Bray-Curtis distances. The regeneration floristic sharing analysis of different areas was conducted by a dendrogram. A total of 818 individuals belonging to 59 species have been sampled, being Allophylus edulis (A.St.-Hil. et al.) Hieron. ex Niederl. the species with the greatest relative importance. Elevated similarity between the regenerative and adult components have been observed (from 0.24 to 0.43), suggesting a low floristic-structural turnover between components. The area under study have shown a greater floristic connection (&lt;40% of dissimilarity) with other spatially close fragments, indicating that altitude and temperature are important ecological factors for its phyto-geographic compartmentalization.
DOI: 10.6084/m9.figshare.5670889
title: FORMATIONS OF COASTAL FORESTS IN THE AMAZON AND ECOLOGICAL RELATIONS WITH VASCULAR EPIPHYTES

description: ABSTRACT Was investigated the vascular epiphytes and relate it to the composition and structure of the arboreal component in two formations of coastal forests in the Algodoal-Maiandeua Environmental Protetion Area, Maracanã, Pará, Brazil. We demarcated four 50m x 50m parcels (two in a dry forest and two in a flooding forest). Were registered and identified all the vascular epiphytes as well as their phorophytes. The abundance and richness of epiphytes were evaluated by the epiphyte/phorophyte ratio and differences in the use of phorophytic species by epiphytes were verified using a MDS. To analyze the influence of phorophyte diameter and height we used a multiple regression. In the dry forest we registered 193 arboreal individuals, of which 96 were phorophytes. Anacardium occidentale was the most abundant arboreal and phorophyte species as well. In the flooding forest we registered 234 arboreal individuals, 131 phorophytes. The most abundant arboreal species were also the ones with the greater number of phorophytes. In both forests the phorophytes were occupied in different ways by the epiphytes. No significant relation was found between phorophyte diameter and height and epiphytes abundance in the dry forest, nevertheless, there was a significant relation in the flooding forest.
DOI: 10.6084/m9.figshare.5670889.v1
title: FORMATIONS OF COASTAL FORESTS IN THE AMAZON AND ECOLOGICAL RELATIONS WITH VASCULAR EPIPHYTES

description: ABSTRACT Was investigated the vascular epiphytes and relate it to the composition and structure of the arboreal component in two formations of coastal forests in the Algodoal-Maiandeua Environmental Protetion Area, Maracanã, Pará, Brazil. We demarcated four 50m x 50m parcels (two in a dry forest and two in a flooding forest). Were registered and identified all the vascular epiphytes as well as their phorophytes. The abundance and richness of epiphytes were evaluated by the epiphyte/phorophyte ratio and differences in the use of phorophytic species by epiphytes were verified using a MDS. To analyze the influence of phorophyte diameter and height we used a multiple regression. In the dry forest we registered 193 arboreal individuals, of which 96 were phorophytes. Anacardium occidentale was the most abundant arboreal and phorophyte species as well. In the flooding forest we registered 234 arboreal individuals, 131 phorophytes. The most abundant arboreal species were also the ones with the greater number of phorophytes. In both forests the phorophytes were occupied in different ways by the epiphytes. No significant relation was found between phorophyte diameter and height and epiphytes abundance in the dry forest, nevertheless, there was a significant relation in the flooding forest.