Repositório RCAAP

Universidade Federal de Minas Gerais

With aim to know the community structure of the Crustacea Brachyura and analyze the trophic dynamics of the species Callinectes dane, C. larvatus e C. ornatus in the seagrass bed of Halodule wrightii Aschers, studies were carried out during a dry period (February, 2001 and September to December, 2001) and the wet period (March to August, 2001) in the Forno da Cal beach, Itamaraca Island, Pernambuco, Brazil. The sampling method adopted was nocturnal trawling on the seagrass using a small (2m width) bottom net with internal mesh of 5mm and external of 2mm. Additional samplings were carried out on a period of 24 hours, in February, May, July, September and December, 2001. Samplings were also carried out on the adjacent sandy flat without vegetation, in March, June, August and December, having as objective to compare the biomass, abundance and diversity of this habitat with the seagrass in this same period. To determinate the gastric evacuation rate in the Callinectes sp., experiment was carried out. The results indicate that the Portunidae family contributed with 93% of the total captures. The species Callinectes ornatus, C. danae, C. larvatus and Portunus ordwayi were the most frequent. The highest density occurred in March, positively correlating with the air temperature, and the highest biomass was observed in July, with a positive correlation to density of cast algae. The seagrass presented the highest averages of densities, biomass, number of species, richness and diversity when compared to the adjacent sandy flat. Even if the number of species observed in the sand is higher, these presented well-distributed in the environment, with equitability value higher than in the seagrass. Animal organic matter, Gastropoda and Macrophyta were the food items that most contributed in the analysis of the stomach content of the species C. danae, C. larvatus and C. ornatus. It was observed that the smallest organisms have fed of small preys and with low mobility, as in the case of highest consume of Polychaeta, Copepoda and Amphipoda by specimens of smaller carapace width. Two feeding rhythms were observed for Callinectes: a diurnal one from 4:00 to 9:00 am and a nocturnal one between 21:00 and 22:00 pm. The evacuation rate (E) obtained by the regression analysis was E = 33.26% VE h-1. The daily ration in the sampled months in the 24-hour analyses was of 798.24% SV (the stomach fullness). After transforming the stomach fullness to somatic weight a day, the observed value was 20.748%.d-1. Then, C. ornatus with weigh of 1 g may consume 0.207 g food/ day. The seagrass bed represented as an important food source to Brachyura s population, due to the diversity of preys and refuge area, not only by the vegetation of seagrass but also by the abundance of cast algae, especially for the species Callinectes danae, C. larvatus and C. ornatus.

Universidade Federal de Sao Carlos

Universidade Federal de Sao Carlos

Universidade Federal de Sao Carlos

Universidade Federal de Sao Carlos

Among the present mammals in the units of conservation Estação Ecológica de Jataí (EEJ) and Parque Estadual de Vassununga (PEV) and in the unit of production, Estação Experimental de Luiz Antônio (EELA), located in the northeast of the State of São Paulo, are the peccaries, Tayassu tajacu. Between March of 2000 and January of 2004, the home range of them, the use of the space, diet and the impacts on the populations in these areas were studied. For obtaining the data, the radiotelemetry technique was used as tool and methods of terrestrial tracking. Seven peccaries received radio-collars for monitoring. It was established four home ranges being three referring to each one of the peccaries of the Estação Ecológica de Jataí (EEJ) and Estação Experimental de Luiz Antônio with 161, 930 and 1.387 hectares and one regarding of the Parque Estadual de Vassununga (PEV), with 350 hectares. It were identified 22 species of plants used by the peccaries and 16 of wich were of confirmed use in the diet, five were considered as of probable use and one species was used as shelter. The diet also included ingested fruits of two palm trees (Família Arecaceae), other native species and five exotic species cultivated at orchards of EELA. It was identified some in this study factors that can be interfering negatively on the populations of peccaries and of other animals as weed killer application, hunts and activities of collection of exotic wood. Indirect impacts were also identified showing the need to improve the system of administration of units of conservation, including the definition of Management Plans that prioritize the regional biodiversity.

Brycon hilarii (subfamily Bryconinae, Characidae), popularly known as piraputanga, is a migratory fish species distributed throughout the entire Paraguay River basin and largely appreciated for its meat quality as well as for fishing, besides being the main species of touristic value in the Bonito region (MS, Brazil). Considering the lack of information on the population genetic structure of these fish, the objective of the present study was to analyze, through the use of microsatellite markers, the distribution of the genetic variability in Brycon hilarii collected in different localities of the Miranda River sub-basin (Paraguay basin) in the Bonito region (MS). For such an end, at first a total of seven polymorphic microsatellite loci capable of producing a considerable genetic variation was prospected (among di-, tri- and tetranucleotides), with their also being efficient in the heterologous amplification for five other species of the genus. In the populational analysis of B. hilarii, the different samples presented very similar genetic diversity levels. Through the FST values, gene and genotype differentiation tests and Bayesian analysis, it was possible to verify (1) the existence of at least two genetic populations of Brycon hularii coexisting in the sampled range, despite being a potentially mobile species; and (2) that only the fish from a reproductive stock were genetically differentiated from the other samples, representing a putative population unit. It is possible that in the reproductive season the more genetically homogeneous individuals organize themselves into a population genetic unit or a reproductive stock, aiming the maintenance of their genetic integrity. These results on the genetic structure of B. hilarii constitute tools of extreme importance considering they can aid the understanding of the behavior and biology of these fish, contributing to fish management and species conservation programs.

Universidade Federal de Sao Carlos

Among the present mammals in the units of conservation Estação Ecológica de Jataí (EEJ) and Parque Estadual de Vassununga (PEV) and in the unit of production, Estação Experimental de Luiz Antônio (EELA), located in the northeast of the State of São Paulo, are the peccaries, Tayassu tajacu. Between March of 2000 and January of 2004, the home range of them, the use of the space, diet and the impacts on the populations in these areas were studied. For obtaining the data, the radiotelemetry technique was used as tool and methods of terrestrial tracking. Seven peccaries received radio-collars for monitoring. It was established four home ranges being three referring to each one of the peccaries of the Estação Ecológica de Jataí (EEJ) and Estação Experimental de Luiz Antônio with 161, 930 and 1.387 hectares and one regarding of the Parque Estadual de Vassununga (PEV), with 350 hectares. It were identified 22 species of plants used by the peccaries and 16 of wich were of confirmed use in the diet, five were considered as of probable use and one species was used as shelter. The diet also included ingested fruits of two palm trees (Família Arecaceae), other native species and five exotic species cultivated at orchards of EELA. It was identified some in this study factors that can be interfering negatively on the populations of peccaries and of other animals as weed killer application, hunts and activities of collection of exotic wood. Indirect impacts were also identified showing the need to improve the system of administration of units of conservation, including the definition of Management Plans that prioritize the regional biodiversity.

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The illegal trade of fauna in Brazil is characterized by the lack of wide and systematic data from official or scientific sources and it's difficult to evaluate the real dimension and impacts of such activity on Brazil, São Paulo State or other Brazilian State. This research was made intending to collaborate with the changes necessary to alter the present panorama of lack of data and information. A total of 8.925 documents about fauna apprehension by the Polícia Ambiental of São Paulo State from 1999 to 2003 were surveyed. The results counted a total of 45.444 wild animals apprehended belong to 341 species, comprising 41.884 (92,17%) birds with 263 (77,13%) species, 2.156 (4,74%) reptiles with 27 (7,92%) species and 1.404 (3,09%) mammals with 51 (14,96%) species. The apprehended birds were related to 23 Orders and 56 Families with approximately 24% of the species considered threatened of extinction, 13% with no geographic range in São Paulo State, 4% exotic, 1% invaders and 0,4% hybrids. The species responsible for up to 50% of the apprehended specimens of birds were: codorna (Coturnix coturnix), canário-da-terra (Sicalis flaveola), coleirinha (Sporophila caerulescens) e pássaro-preto (Gnorimopsar chopi). With regard to the mainly destinations of the 41.884 birds apprehended, approximately 38% was categorized as No Declared Destinations, 25% as Other Destinations and 10% as Releases. The apprehended reptiles were related to 4 Orders and 14 Families with approximately 50% of the species considered threatened of extinction, 8% with no geographic range in São Paulo State and 7% invaders. The species responsible for up to 50% of the apprehended specimens of reptiles was: tigre-d'água (Trachemys dorbignyi). With regard to the mainly destinations of the 2.156 reptiles apprehended, approximately 72% was categorized as No Declared Destinations, 8% as Releases and 4% as CETAS. The apprehended mammals were related to 9 Orders and 22 Families with approximately 67% of the species considered threatened of extinction, 2% with no geographic range in São Paulo State, 6% exotic, 4% invaders and 2% vagrants. The species responsible for up to 50% of the apprehended specimens of mammals were: capivara (Hydrochaeris hydrochaeris), gambá (Didelphis albiventris) e tatu-galinha (Dasypus novencinctus). With regard to the mainly destinations of the 1.404 mammals apprehended, approximately 35% was categorized as Discarded, 25% as Releases and 18% as No Declared Destinations. The lack of data about apprehended species and their destinations in São Paulo State become evident in the fact that there are no data (from scientific or official sources) to provide a direct comparison with the results showed by this research. So, the construction of a wide and systematic database about these issues and the planning of environmental public policies, truly focused on the conservation of the biodiversity in São Paulo State, are a necessity that can't be postpone any longer.

Universidade Federal de Sao Carlos

Mendonça J. T., 2007 The south coast of the São Paulo State the fisheries resources are the economic base of the region, with a variety of fish, crustaceans and clams, with diversification of the arts fishiries by the local communities. The work was developed in the south coast of the State of São Paulo (Brazil), in the Estuarino-lagunar Iguape-Cananéia-Paranaguá Complex, in the area called of lagamar of Cananéia, Iguape and Ilha Comprida, and final portion in the Ribeira of Iguape river, with the total period of the information between February of 1995 the December of 2006, with dates of each city. The region fisheries activit presents a concern aspect, but don t despairing aspect, since involve three cities (Cananéia, Iguape and Ilha Comprida cities) with IDH medium and clear conditions of improvements. It involves 50 fishing communities with particular and similar characteristics between itself, with the agricultural comunities with lesser incomes, having devotion to fisheries and the parallels activities as agriculture and the extrativismo, mainly vegetal. The main fishing products of the south coast are: broadband anchovy (Anchoviella lepidentostole), the seabob shrimp (Xiphopenaeus kroyeri), the king weakfish (Macrodon ancylodon), the grey mullet (Mugil platanus), the white mullet (Mugil curema), the whitemouth croaker (Micropogonias furnieri), the blue swimming crab (Callinectes sapidus) and the mangrove oyster (Crassostrea brasiliana). The fishing fleet of the region has as characteristic to be of small scale and artesanal, with boats wooden with small autonomy of sea or of estuary, with high number of arts and methods of fisheries, as well as dependence of harvests. The problems main problems found in the activity fishing are the lack or inadequate fiscalization, the commercialization of the products the values insufficient for the maintenance of the activity the levels compensatory and deficiency in the management fisheries regional, without endorsement of the state and federal managing agencies. Seven species presented significant reduction in its abundance (seabob shrimp, broadband anchovy, mangrove oyster, white mullet, king weakfish, blue crab and atlantic thread herring Opistonema oglinum); three species presented increase in the abundance index (pink shrimp, crab-uçá and grey mullet); and four has its abundance indices stasble (whitemouth croaker, white sea catfish Genidens barbus, southern white shrimp Litopenaeus schmitti and castin leatherjacket Oligoplites saliens). To implement the fisheries recources management is necessary the strengthem of the Management Council of the APA-CIP with co-management, of deliberative character and with discussion of the problems and guiding of the solutions, including normatives, control and promotion of the activity through the institutions that compose it. The biggest problem for the implementation of a co-management is the lack of compromise of the management agencies with the society, presenting lack structure agencies, as well as the lack of will politics to share decisions and to divide the actions power. The fisheries management would have to be ecosystem approach fisheries, since the fishing of some species (multispecific), dependents of harvests, with fisheries diversify, arts and methods fisheries, with other productive activities to fishery. For fisheries resources with recuction of abundance indices the fisheries management could be local with the species that have its confined live cycles in the region, don t making part of the captures in other areas of the Brazilian coast, having as main management instrument the limitation of the fisheries effort through the fisheries cadastre and licensing of the fishermen and boats in regional way, with administration through the Management Council, its assign to rules and requirements to guarantee the activity to the fishermen local. For fisheries resources that have its live cycles outside region, to make part of the captures of other fishing capture to long of Brasilian coast, the best way of fisheries management, possibly would be of analysis of all area of fish of the resource, with joint actions with all involved ones, limiting the number of users, establishing exploration areas, with new licensing and permissions fisheries of the boats that will act in each area.

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In this paper data on catch, fishing effort and landings from the Brazilian baitboat fishery, together with information on vessel characteristics were analyzed aiming to: (a) describe the fishery and characteristics of the fishing fleet, analyze catch composition and spatial and temporal distribution of catches, fishing effort and catch rates of skipjack (Katsuwonus pelamys); (b) develop standardized indices of abundance for skipjack using generalized linear models (GLM); and (c) apply a nonequilibrium surplus production model for stock assessment of west Atlantic skipjack through the ASPIC program version 5.0. Skipjack is the most important species caught from Brazilian tuna fisheries; its catches comprise more then 50% of the total tuna catches from this fishery. The fishing area is located in the south and southeast regions of Brazil, from 20oS to 35oS, but fishing operations are carried out mainly between 28oS and 34oS. The highest catch rates are recorded in the south region during the first and fourth quarters and the smallest ones in the third quarter. Skipjack landings are made in Rio de Janeiro, Santa Catarina and Rio Grande do Sul states, with Santa Catarina being the most important landing place. The highest landings are recorded during the summer months (February and March) and the smallest ones during the winter months (August and September). The baitboats shows different characteristics; length of vessels varies from 15 to 49.5 meters. Skipjack catch rates from each vessel varies according with its size, which means that fishing power is a function of vessel size. The frequency distributions of skipjack CPUE are highly skewed with a relatively large proportion of zero observations. Standardization of skipjack CPUE (catch per unit of effort) was performed through generalized linear models, using delta-GLM methods, which involves fitting of two sub-models to the data. A first sub-model was applied assuming the binomial error distribution for the proportion of positive catches and a second sub-model was used for the positive catches assuming a different error distribution. Two alternative distributions were assumed for the positive catches, the lognormal and the Gamma distribution. Deviance tables were performed to identify the best set of factors and interactions that most adequately explained the observed variability in proportion of positive catches and positive CPUE. Geographical distribution (fishing area) and sea surface temperature together with the interaction year*GRT were the most important explanatory effects for the occurrence of a non-zero catch. On the other hand GRT and season, together with year*area, year*season and year*GRT interactions explained the most variability on the observed CPUE of positive catches. The standardized indexes were estimated using Generalized Linear Mixed Models, in which year, area, season, sea surface temperature, vessel length and GRT were included as main explanatory fixed effect factors and all first order interactions with year as random components. Delta-lognormal and delta-Gamma models showed a good fit to the data but narrower confidence intervals and small coefficients of variation were shown for standardized CPUE estimated by the delta-Gamma model. Results from these analyses show the importance of the study of CPUE and factors that have effect on its variations to understand the dynamics of this fishery. However not all factors that have an effect on variations in skipjack CPUE were considered, such as, bait species and amount of life bait, because this sort of information was not present in the majority of data available for analysis. A great amount of the information collected through logbooks are incomplete and imprecise, implying that institutions responsible for the implementation of this data collection system are not aware or do not recognize its importance as an instrument that makes possible to get information of great value for the management and utilization of fishery resources. Results of the stock assessment analysis provided an estimate of 26,930 MT for skipjack maximum sustainable yield, which is about 14% higher than catches taken in 1998. This estimated yield may looks like realistic but other parameter estimates seems to be unrealistic, suggesting that the west Atlantic skipjack stock is in an overexploited state, which may not be true. Considering the uncertainties and limitations about the data some of the parameters estimates may be imprecise. Therefore, results from this analysis should be cautiously used to make decisions on management measures for this fishery. A good stock assessment depends not only on the adequacy of the model available for the analysis but also on the quality of the data that the model is fitted to. Therefore, in order to have effective stock assessment for skipjack in future, an efficient system for the collection of data from this fishery shall be implemented. This data collecting system should include mechanisms for data verification, such as observer programmes to monitor catch, effort and other details of the fishing operations.

Dados sobre a ecologia alimentar de aves de sub-bosque foram coletados em duas áreas de Mata Atlântica no sudeste do Brasil. As duas áreas, conhecidas como mata da Fazenda Continente (dados de 2001-2002) e Mata Grande (situada no Parque Estadual do Ibitipoca, dados de 2004), localizam-se no sudeste do Brasil, estado de Minas Gerais. Durante amostragens utilizando redes ornitológicas, foram realizadas 1202 capturas de 883 indivíduos. Dentre as 58 espécies anilhadas, 42 forneceram amostras fecais. Na triagem dos itens alimentares de 434 amostras foram encontrados 2535 itens dos quais 2286 (90,2%) foram identificados com algum detalhamento, principalmente invertebrados e frutos. Embora não tenha sido detectada diferença na ocorrência dessas duas categorias alimentares, ocorreram diferenças nas proporções do consumo de Araneae e Ovos e larvas de inseto. Além disso, a composição taxonômica dos frutos na dieta foi muito diferente entre as duas áreas. Algumas aves, como Mionectes rufiventris e Conopophaga lineata, consideradas como generalistas, parecem apresentar especialização de dieta. As taxas de captura mensais de aves frugívoras não estiveram correlacionadas à abundância de frutos, mas as aves foram mais capturadas nos pontos e meses onde as abundâncias eram maiores, evidenciando a correlação espacial. Por sua vez, as capturas de aves insetívoras não exibiram relação com a variação sazonal ou espacial da densidade de invertebrados, resultando em estabilidade sazonal das taxas de captura bem como distribuição espacial influenciada principalmente pela estrutura da vegetação. Estudo da auto-ecologia de Dysithamnus mentalis revelou preferência alimentar para grupos de presas (táxons e larvas de inseto) e também para o tamanho dessas presas. No primeiro caso, é possível que a preferência esteja associada aos aspectos comportamentais, propondo-se investigações quantitativas detalhadas sobre o forrageio da espécie. Em contrapartida, a preferência por presas maiores do que aquelas observadas no ambiente sugere que a espécie comporta-se de acordo com a teoria do forrageio ótimo. O conhecimento da ecologia trófica das aves neotropicais ainda é escasso, e os resultados encontrados demonstram que, em alguns casos, os padrões ecológicos das respostas das aves aos recursos encontrados no ambiente pode ser diferente daqueles encontrados em outras regiões dos neotrópicos. Os resultados apontam para a necessidade de ampliar investigações sobre o tema, especialmente em outras áreas de Mata Atlântica do sudeste do Brasil.

The increase of the antropic action on the different forms of vegetation imposes the necessity to study the forest species, as much as for its conservation, as for its use in environment and productive plantations. If the species is still widely explored in function of the quality of its wood and of other types of products, they increase the risks for its extinction, and the Myracrodruon urundeuva ( aroeira ) is a species that fits in these aspects. The seed still is the most popular and common form of reproduction of the majority of the forest species, and also for its "ex-situ" conservation. However, the majority of the works on storage is conducted in cold or dry chambers, or its combination, of high cost, for periods around 12 months, and not always they reach the variation of the packages, in relation to the permeability. The option of keeping the quality of diasporas of "aroeira", deriving of seeds collection area, in Cuiabá, Brazil, and cheaper conditions to be stored, and of this form, accessible to more users was evaluated under different forms. In controlled chamber for a conditioning air device, the viability of diasporas of "aroeira" was conserved up to 30 months of storage, while the vigor was kept up to six months, independent of the type of packing used, since the impermeable one, until the total permeate one. In room environment the viability and the vigor were been reduced, at the age of six months, but in lesser speed, when the diasporas were conditioned in packing of can and polyethylene bag; at the age of 12 months the deterioration increased and at the age eighteen it was complete. Positive and significant correlations between the methods of analysis of viability as well as of vigor had been observed. The test of accelerated ageing presented resulted satisfactory to evaluate the quality of the diasporas of aroeira , while the tests of electric conductivity and of the diasporas thousand mass had not been adjusted. The evaluation of the initial development of seedlings, produced from the diasporas stored under different conditions, resulted in lesser values of height, diameter of collar and total dry substance mass, in relation to produced seedlings with the diasporas just harvested. However, with the development of the seedlings, these differences did not remain and presented inferior as well as superior values, in relation to the previous evaluations. It is possible to keep the viability of diasporas of aroeira , for at least up to 30 months, and its vigor up to six months, with its storage in controlled chamber.

This work has as objective to to apply and compare five different methodologies of environmental analysis and to produce maps thematic that: they characterize the environment, they evaluate the susceptibility and the potential to the laminate erosion, they to determine potential the environmental fragility and emergent, they evaluate the vulnerability to the erosion, esteem the average losses of soil and the production of sediments and thus they evaluate the environmental sustainable of the Water-Basin of the River Tenente Amaral in Jaciara, Mato- Grosso, Brazil. For the present study one uses of techniques of Geoprocessing and cartographic data soil, geology, the geomorphology, the climate, the vegetation and the use of the soil of the region of the Basin, converting them for the digital format. The results demonstrated that the studied area presents high percentage of human activities (84%) predominating the sugarcane cultivation. The soil predominance of type LATOSSOLOS and NEOSSOLOS QUARTZARÊNICOS in soft relief was distinguished in the region proceeding from the claysand layer unconsolidated sediments of the Cochoeirinha Formation that if presents with bigger area of occurrence in the place. With the application of the methodologies for the study of the area it was verified that approximately 55% of it present average the high potential' to the laminate erosion; natural conditions of strong instability `the very strong one'; balance in the occurrence of processes of morphogenese and pedogenese; average losses of high soil had been classified enter `and very high' e, in relation to the production of sediments, was verified that the esteem production more is accented in the places where the use of the soil is intensive, being able to reach up to 0,433 t.ha¹.

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