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Ecologia do caranguejo Ocypode quadrata (FABRICIUS, 1787) em ecossistemas de dunas no litoral de Santa Catarina, Brasil
(Universidade Federal de São Carlos, 2018-08-09) Vale, Julia Gomes do; Branco, Joaquim Olinto; https://lattes.cnpq.br/3241905846920207; https://lattes.cnpq.br/0535326549747017
The semi-terrestrial crab, Ocypode quadrata (Fabricius, 1787), popularly known as ghost crab in the world and maria-farinha in Brazil, is the most conspicuous invertebrate on sandy beaches of the western Atlantic coast. The species is extremely relevant to this ecosystem, since it´s the top-chain predator concerning to other invertebrates. However, the study about biology of this crab still exhibition a shortage of information. Therefore, the objective of this work was to evaluate the diet and population dynamics of O. quadrata in three morphodynamic beaches in southern coast of Brazil. The collections were carried out on March 2017 to February 2018, on the beaches of Lagoa de Barra Velha, Navegantes and Brava, located in coast of northern Santa Catarina. A total of 698 specimens were captured: 55.58% males, 33.52% females, 1.86% ovigerous females and 10.90% juveniles. Among these, 660 stomachs were examined and the food categories were expressed by the food index (IAi). The crab diet did not show significant differences regarding sex, ontogeny and beaches with different morphotypes. There was only variation in relation to the year, with the most representative categories being Insecta, Unidentified organic matter and Crustacea. The O. quadrata crab was classified as opportunistic with a carnivorous food habit, with a trend to insectivory. Regarding the population aspects, the densities of burrows showed no differences during the year and between the environments, and the pattern distribution of burrows was aggregated for the three beaches. Regarding sex ratio, there was a deviation in favor males at some periods in the year for the three sites. The recruiting period occurred in late summer in Navegantes and in the cold season in Barra Velha and Itajaí. Sexual dimorphism was evident for this species, males tended to invest more in body mass than females, but both presented positive allometric growth. There was also a difference in growth between the beaches of Itajaí and Navegantes. Von Bertalanffy's growth model demonstrated that the highest value L∞ (maximum width) estimated for both sexes was in the reflective beach (Barra Velha). The maximum longevity of the species was Tmax = 4.86 years for males and Tmax = 3.61 years for females. Regarding sexual maturity, the size of first gonadal maturation (L50) for the species resulted in differences between the sexes, with males ranging from 2.40 cm to 2.83 cm and females between 2.84 cm to 3.01 cm.
Conhecendo o nanomundo, produzindo nanoartes; uma etnografia das formas a associações emergentes em um laboratório de nanotecnologia
(Universidade Federal de São Carlos, 2018-08-09) Silva Filho, Maurilio de Jesus; Lanna, Marcos Pazzanese Duarte; https://lattes.cnpq.br/8355559441138016; https://orcid.org/0000-0003-3723-7725; https://lattes.cnpq.br/0047994357021409
This ethnography is about the produce of images and senses in the world on nanometric scales in a scientific and technological laboratory. Images that come to life and senses and transformed in artistic artifacts. The Nanoart, imaginative creations that have their root in the images of electronic microscopes, are not merely the matter of study of this work, they also help me as ethnographic guides into my immerging and learning what is going on in a nanotechnology laboratory, named LIEC. The nanoworld, the world occurring in the depths of matter and inhabited by vibrations and atomic particles are explored there, in the dual meaning of this word. Molecules and atoms are embedded by researches in a repeated search for management of the forms and associations of chemical compounds manipulated by the wish of their “masters. Scientific images that are generated by microscopes and spread as visible evidence of a characteristic of the material produced. The later generated arts are a small fraction of these scientific images chosen to become artistic artifacts. They are inserted internal and external to the scientific world into circulation, included into contexts of scientific popularization and disperse in the social environment, acting as elements of perception capture in favor of the worlds on nanoscale, this world that is in a daily interaction with researchers and laboratory technicians.
Avaliação ambiental e estrutura das comunidades de peixes e invertebrados marinhos em áreas de arrasto camaroeiro do litoral de Santa Catarina, Brasil
(Universidade Federal de São Carlos, 2018-08-09) Barrilli, Germano Henrique Costa; Rodrigues Filho, Jorge Luiz; https://lattes.cnpq.br/1847907417927121; Verani, José Roberto; https://lattes.cnpq.br/0053232138684810; https://lattes.cnpq.br/8115506438230738
The shrimp trawling is carried out all over the Brazilian coast and has a significant economic, social and cultural importance. This type of fishing is recognized by the impacts that they cause on the substrate and benthic fauna, being effective for the target species, but not selective for the others species, considering that most of them are caught "unintentionally". In this work, the trawls of three traditional fishing areas of the Santa Catarina coast were analyzed from different perspectives, leading to the elaboration of four chapters. The first chapter deals with the environmental and ecological evaluation of the invertebrate species that occur in these places, the relationships with the environmental variables and possible impacts in the trawling areas. In the second chapter, under the same perspective of the first, the ichthyofauna of these sites was analyzed to evaluate its response to environmental conditions. The third chapter presents a conservationist approach, where the fish and invertebrate communities were evaluated in order to identify the best strategy for conservation, considering the dissimilarities and the organization of the species among the sites. Finally, the fourth chapter provides biological information on the main fish species from the central locality of our studies (Penha-SC). Considering the three studies, we conclude that: (1) - the areas are under frequent disturbances; (2) - Barra do Sul has a homogeneous substrate, predominantly sandy, which causes negative effects in the fish and invertebrates communities, (3) - Porto Belo has the highest diversity of species and the best quality of habitats, while Penha is in an intermediate situation between the studied environments; and (4) - three environments are different and have a high conservation value, particularly for high turnover of species. Therefore, these areas need prioritization for regional conservation. Stimulating future bycatch experiences for biota knowledge is necessary, since most of the marine invertebrate and fish species captured in this study lack behavioral, biological, and ecological information. Thus, to know more about the dynamics of the populations affected in this and in the other trawling areas of the Brazilian coast is of extreme importance to manage and contribute with the conservation of the species, aiming the sustainability of the fisheries.
Cidades em disputa: gestão dos usos do espaço e política das práticas a partir da Praça Roosevelt, em São Paulo
(Universidade Federal de São Carlos, 2018-08-09) Pimentel, André de Pieri; Feltran, Gabriel de Santis; https://lattes.cnpq.br/6789864439048444; https://lattes.cnpq.br/4632692404290852
This ressearch intents to analyse, based on ethnographic study made in Praça Franklin Roosevelt, a public square in the neighborhood of Consolação (Central region of São Paulo), interfaces between determined mechanisms of space management and their concrete appropriation, destabilization and resistences. Builded in 1970, in the middle of the brazilian military dictatorship, the square was completely rebuilded in the year 2010, by the cost of R$ 55 million. Among the intentions behind such intervention, there were an attempt to estabilish a higher state control of the uses of that space, considered as problematic from a urban planning point of view. But, despite the intense presence and transit of police forces in the space since the reconstruction, not only certain modalities of insurgent uses still occupy it but also many of them assume directly critical positions on that repressive management of the uses of public spaces. The focus on this ressearch is to think apropriations, questionings, ruptures, in an experience level, of political discourses and institutional mechanisms that act in the establishment of a restrictive and reppressive management.