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Spatial and temporal distribution of fish in Palmas bay, Ubatuba, Brazil

ROCHA, Maria Luiza Chisté Flaquer da; FERNANDEZ, Wellington Silva; PAIVA FILHO, Alfredo Martins
Fonte: Universidade de São Paulo, Instituto Oceanográfico Publicador: Universidade de São Paulo, Instituto Oceanográfico
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
55.95%
The aim of this study was to analyze the distribution and abundance of the fish fauna of Palmas bay on Anchieta Island in southeastern Brazil. Specimens were caught in the summer and winter of 1992, using an otter trawl at three locations in the bay. The specimens were caught in both the nighttime and daytime. Data on the water temperature and salinity were recorded for the characterization of the predominant water mass in the region, and sediment samples were taken for granulometric analysis. A total of 7 656 specimens (79 species), with a total weight of approximately 300 kg, were recorded. The most abundant species were Eucinostomus argenteus, Ctenosciaena gracilicirrhus, Haemulon steindachneri, Eucinostomus gula and Diapterus rhombeus, which together accounted for more than 73% of the sample. In general, the ecological indices showed no differences in the composition of species for the abiotic variables analyzed. The multivariate analysis showed that the variations in the distribution of the fish fauna were mainly associated with intra-annual differences in temperature and salinity, resulting from the presence of South Atlantic Central Water (SACW) in the area during the summer. The analysis also showed an association with the type of bottom and a lesser association with respect to the night/day periods.; Este estudo teve como objetivo analisar a composição e a abundância da fauna de peixes provenientes da enseada Palmas em Ubatuba...

Pattern of distribution and environmental influences on the Scienidae community of the Southeastern Brazilian coast

Schmidt, Thassya Christina dos Santos; Dias, June Ferraz
Fonte: Universidade de São Paulo, Instituto Oceanográfico Publicador: Universidade de São Paulo, Instituto Oceanográfico
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
55.95%
The Sciaenids have among the highest species richness, numerical abundance and biomass of any family of fishes along the Brazilian coast. The aim of this study was to analyze the composition and spatial and temporal distribution of as well as the influence of temperature, salinity and depth on the sciaenid assemblage of Santos Bay. A total of 29,306 individuals belonging to 13 genera and 21 species were captured, between November 2004 and December 2005, with Stellifer rastrifer representing 70.4% of the total composition. Highest abundance and biomass occurred on the east side of the bay, and the highest species richness occurred near the mouth of the Santos Channel, which was also the site with least similarity to the other sites. Highest abundances occurred in April 2005 and lowest in September 2005. Key environmental factors influencing distribution of sciaenids were depth and temperature.

Distribuição das populações de Cladocera (Branchiopoda) nos reservatórios do médio e baixo Tietê: uma análise espacial e temporal; Distribution of Cladocera (Branchiopoda) populations on medium and low Tietê river reservoirs: a spatial and temporal analysis

Zanata, Lucí Helena
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 05/12/2005 PT
Relevância na Pesquisa
56.03%
Reservatórios artificiais são ecossistemas de grande importância econômica e social, porém, alteram as características hidrológicas e ecológicas do meio, interferindo na organização das comunidades bióticas que desempenham papel fundamental na transferência de energia no ecossistema. Nesses ambientes, pode existir uma organização espacial e temporal, tornando diferenciada a composição e distribuição das comunidades. Com o objetivo de verificar essa organização, a comunidade zooplanctônica, com ênfase nas populações de Cladocera, foi avaliada em amostras coletadas nas estações distribuídas no eixo longitudinal dos reservatórios do médio e baixo Tietê (SP), nos meses de fevereiro, maio, julho e outubro de 2000. Os dados obtidos foram relacionados às características ambientais, tais como pH, condutividade, temperatura, oxigênio dissolvido, material em suspensão, nutrientes e clorofila a desse ambiente. Os resultados apontaram para uma diferenciação esperada ao longo do eixo longitudinal do rio Tietê, tanto nas características físicas e químicas, quanto na abundância e distribuição dos organismos. Os reservatórios do médio Tietê estiveram mais eutrofizados do que os reservatórios do baixo Tietê nos períodos analisados...

Distribuição espaço-temporal de Olivella minuta (LINK, 1807) (Mollusca, Gastropoda, Olividae) na praia de Barequeçaba, Litoral Norte do Estado de São Paulo; Spatial and temporal distribution of Olivella minuta (LINK, 1807) (Mollusca, Gastropoda, Olividae) Barequeçaba Beach, North Coast of São Paulo

Tardelli, Daniel Teixeira
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 27/09/2013 PT
Relevância na Pesquisa
56.09%
Praias arenosas são caracterizadas por uma abundante macrofauna, composta por poliquetas, moluscos e crustáceos. Dentre os moluscos, os gastrópodes constituem um dos grupos mais conspícuos. Entretanto, as informações sobre esse grupo em praias são escassas e se referem principalmente à ocorrência em comunidades. O neogastropoda Olivella minuta é comum e abundante em praias do Litoral Norte de São Paulo. Porém, há importantes lacunas no conhecimento quanto à distribuição desta espécie. Diante desse cenário, o presente estudo visou analisar a distribuição espaço-temporal de Olivella minuta na praia de Barequeçaba, bem como os fatores ambientais relacionados a essa distribuição. Para análise da distribuição espacial de O. minuta ao longo do entre-marés da praia, amostras foram obtidas em outubro de 2009, a partir de doze estações perpendiculares à linha da água, compostas por três transectos com seis níveis cada. Os fatores abióticos (características do sedimento) e bióticos (descritores da macrofauna) que compõem cada estação também foram amostrados e relacionados com a distribuição da espécie. Os resultados revelaram que os indivíduos ocorreram em maior densidade na porção sul da praia...

Análise da influência da distribuição temporal das chuvas intensas e de cenários de uso e ocupação do solo na quantificação dos prejuízos econômicos diretos provocados pelas inundações urbanas; Economic analysis of urban stormwater under two methods of temporal distribution of rainfall

Abreu, Fernando Girardi de
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 18/10/2013 PT
Relevância na Pesquisa
66.14%
Como já sabemos, as inundações urbanas no Brasil são decorrentes principalmente do processo de urbanização desordenado que se acentuou a partir da década de 50. As inundações causam problemas tais como: perdas humanas, problemas de saúde pública, degradação da qualidade das águas e prejuízos econômicos da ordem de bilhões de reais. Para tanto, a pesquisa objetivou analisar os prejuízos decorrentes de inundações urbanas na bacia do Córrego do Gregório no município de São Carlos SP, sob duas formas de distribuição temporal de chuvas intensas, considerando seis cenários alternativos de ocupação da bacia e períodos de retorno de 25, 50 e 100 anos. A pesquisa ocorreu em etapas: foram aplicados os métodos de distribuição temporal de chuvas de Huff 1º quartil e blocos alternados para análise dos hidrogramas de cheia na região central da cidade, próxima ao mercado municipal, área sujeita a inundações frequentes. Na sequência, foram traçadas as manchas de inundação resultantes por meio de Sistema de Informação Geográfica (SIG); cadastrados os imóveis residenciais e comerciais (objetos de estudo) presentes na mancha de inundação; desenvolvido um banco de dados em plataforma SIG com as informações dos imóveis; definidas as profundidades de submersão dos imóveis cadastrados para as condições de contorno do estudo. Finalmente...

Spatial and temporal distribution of tadpole assemblages (Amphibia, Anura) in a seasonal dry tropical forest of southeastern Brazil

Vasconcelos, Tiago da S.; dos Santos, Tiago G.; Rossa-Feres, Denise de C.; Haddad, Celio Fernando Baptista
Fonte: Springer Publicador: Springer
Tipo: Artigo de Revista Científica Formato: 93-104
ENG
Relevância na Pesquisa
56.07%
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); Processo FAPESP: 02/13602-4; We determined spatial and temporal distribution of tadpoles in 11 breeding habitats from Morro do Diabo State Park (MDSP), southeastern Brazil. Breeding habitats occupancy by tadpoles was tested to be different from a null model of random placement of species. We also tested whether tadpole occupancy in a given breeding habitat is organized according to different ecomorphological guilds, and we analyzed spatial partitioning of tadpoles among breeding habitats through similarity analysis. For temporal analysis we analyzed temporal partitioning of tadpole monthly occurrence also using similarity analysis, and assessed what climatic variable better predicts tadpole temporal occurrence in the MDSP, through regression analysis. Among tadpoles from 19 anuran species, distribution was different from a null model, but co-occurrence patterns among the breeding habitats did not differ among different guilds. However, breeding habitats with similar hydroperiods had similar species composition, which may be related to the reproduction patterns of species. Among the three climatic variables analyzed (rainfall...

Spatial and temporal distribution of the shrimp nematopalaemon schmitti (Decapoda: Caridea: Palaemonidae) at a subtropical enclosed bay in South America

Fransozo, Vivian; Castilho, Antonio Leao; Fúreire, Flvio Aurélio Morais; Furlan, Michele; De Almeida, Ariádine Cristine; Teixeira, Gustavo Monteiro; Baeza, Juan Antonio
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Artigo de Revista Científica Formato: 1581-1587
ENG
Relevância na Pesquisa
65.98%
The spatio-temporal distribution of the soft bottom dwelling shrimp Nematopalaemon schmitti and the effect of environmental conditions (sediment characteristics, temperature, salinity and dissolved oxygen) on its abundance were studied at Ubatuba Bay, south-eastern coast of Brazil. Surveys were conducted monthly from September 1995 to August 1996. Each sampling set comprised eight different transects distributed within the bay. Comparisons of CPUE of shrimp among sampling stations demonstrated that the abundance of N. schmitti was the greatest during winter, when average water temperature within the bay was considerably lower than during the rest of the year. Most shrimps (more than 95%) were collected at a single transect located at the northernmost side of the bay, demonstrating the extremely patchy distribution of this species. A multiple regression analysis using data only from this northernmost transect indicated that temperature was the most relevant factor affecting the abundance of N. schmitti during the year. Copyright © 2009 Marine Biological Association of the United Kingdom.

The brown lacewings (Neuroptera, Hemerobiidae) of northwestern Turkey with new records, their spatio-temporal distribution and harbouring plants

Kovanci,Orkun Baris; Canbulat,Savas; Kovanci,Bahattin
Fonte: Sociedade Brasileira De Entomologia Publicador: Sociedade Brasileira De Entomologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2014 EN
Relevância na Pesquisa
55.95%
The brown lacewings (Neuroptera, Hemerobiidae) of northwestern Turkey with new records, their spatio-temporal distribution and harbouring plants. The occurrence and spatio-temporal distribution of brown lacewing species (Neuroptera, Hemerobiidae) in Bursa province, northwestern Turkey, was investigated during 1999-2011. A total of 852 brown lacewing specimens of 20 species, including the genera of Hemerobius, Megalomus, Micromus, Sympherobius, and Wesmaelius were collected. Of these, 12 species were new records for northwestern Turkey while Sympherobius klapaleki is a new record for the Neuroptera fauna of Turkey. The most widespread species were Hemerobius handschini and Sympherobius pygmaeus with percent dominance values of 42.00 and 15.96%, respectively. Wesmaelius subnebulosus was the earliest emerging hemerobiid species and had the longest flight activity lasting from March to October. The species of southern origin characterized by the Mediterranean elements constituted 55% of the hemerobiid fauna and prevailed over the species of northern origin that belong to the Siberian centres. The total number of hemerobiid species reached a peak in July with captures of 15 species per month. There were 11, 13, 18 and 5 hemerobiid species occurring at altitudes between 1-500...

Population biology and distribution of the tanaid Kalliapseudes schubarti Mañé-Garzon, 1949, in an intertidal flat in Southeastern Brazil

Leite,F. P. P.; Turra,A.; Souza,E. C. F.
Fonte: Instituto Internacional de Ecologia Publicador: Instituto Internacional de Ecologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/08/2003 EN
Relevância na Pesquisa
55.95%
The population biology and the spatial and temporal distribution of Kalliapseudes schubarti Mañé-Garzon, 1949, a common tanaidacean in mud flats and estuaries in southern and southeastern Brazil, was studied in the Araçá region, São Sebastião (SP), Brazil. This species showed a clustered dispersion in the area and the individuals were concentrated in the superficial sediment layer (5 cm). Higher densities of K. schubarti were recorded in areas characterized by moderately sorted fine sediment. Multiple regression analysis revealed a positive influence of the organic matter contents and a negative effect of the silt-clay contents on the abundance of K. schubarti. This species showed a marked temporal variation with very low abundance in winter and fall (March to August). Sexual dimorphism was evidenced with males being larger than females. Ovigerous females were also larger than pre-ovigerous ones. Sex ratio was skewed towards females. Seven cohorts were identified during the sampling period, the estimated longevity was 12 months, and no seasonal oscillation in growth was evidenced. The continuous reproduction, as evidenced by the presence of larval phases (manca II and neutron) and reproductive females throughout the year, and high fecundity among the tanaids associated with fast growth and limited longevity support the case for the opportunistic life strategy suggested for this species in the literature.

Spatial and temporal distribution in density and biomass of two Pseudodiaptomus species (Copepoda: Calanoida) in the Caeté river estuary (Amazon region - North of Brazil)

Magalhães,A.; Costa,R. M.; Liang,T. H.; Pereira,L. C. C.; Ribeiro,M. J. S.
Fonte: Instituto Internacional de Ecologia Publicador: Instituto Internacional de Ecologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/05/2006 EN
Relevância na Pesquisa
66.01%
Spatial and temporal density and biomass distribution of the planktonic copepods Pseudodiaptomus richardi and P. acutus along a salinity gradient were investigated in the Caeté River Estuary (North-Brazil) in June and December, 1998 (dry season) and in February and May, 1999 (rainy season). Copepod biomass was estimated using regression parameters based on the relation of dry weight and body length (prosome) of adult organisms. The Caeté River Estuary was characterized by high spatial and temporal variations in salinity (0.8-37.2‰). Exponential length-weight relationships were observed for both Pseudodiaptomus species. Density and biomass values oscillated between 0.28-46.18 ind. m-3 and 0.0022-0.3507 mg DW. m-3 for P. richardi; and between 0.01-17.02 ind. m-3 and 0.0005-0.7181 mg DW. m-3 for P. acutus. The results showed that the contribution of P. richardi for the secondary production in the Caeté River Estuary is more important in the limnetic zone than in other zones where euhaline-polyhaline regimes were predominant. However, it was not possible to observe a clear pattern of spatial and temporal distribution for P. acutus.

Reproductive biology and spatio-temporal distribution of Stellifer rastrifer, Stellifer naso and Macrodon ancylodon (Sciaenidae) in the Caeté estuary, northern Brazil

Camargo,Mauricio; Isaac,Victoria
Fonte: Universidade de São Paulo, Instituto Oceanográfico Publicador: Universidade de São Paulo, Instituto Oceanográfico
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2005 EN
Relevância na Pesquisa
65.99%
This study analyses the spatial and temporal distribution of the dominant Sciaenids in the Caeté estuary on the northern coast of Brazil. Samples were taken by otter trawls in four areas of the Caeté estuary between October 1996 and August 1997 six bimonthly. Stellifer rastrifer, Stellifer naso and Macrododon ancylodon presented the highest biomass out of eleven species of Sciaenidae caught. Minimum and mean length at first maturity were calculated and the main spawning periods determined. Changes in the spatio-temporal distribution of the three species were related to seasonal changes in estuarine salinity and spawning pulses. Larvae and juveniles of S. rastrifer, S. naso and M. ancylodon were found in the inner estuary while larger specimens were more abundant in the outer estuary with higher salinities. M. ancylodon spawned from October to February and rested from April to August whereas S. rastrifer and S. naso spawned throughout the year, though with two peaks, in October-December and June.

Spatial and temporal distribution of Nematoda in a subtropical estuary

Kapusta, Simone Caterina; W??rdig, Norma Luiza; Bemvenuti, Carlos Em??lio; Pinto, Taciana Kramer de Oliveira
Fonte: Universidade Federal do Rio Grande Publicador: Universidade Federal do Rio Grande
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
66.02%
The spatial and temporal distribution of Nematoda communities was analysed in three environments :in the Tramanda?? lagoon , where there is a constant input of fresh water,in the Armaz??m lagoon , where saline water enters more often , and in the Channel which links the lagoons to the Atlantic Ocean . A total of 27 genera of Nemato d a were recorded .In the Armaz??m lagoon the Tersch ellingia , Pseudo chromadora , Anoplostoma , Theristus and Metalinhomoeus were more representative. Daptonema and Viscosia were dominant in the Channel and Anonchus , Ther istusand Oncholaimellus in the Tramanda?? lagoon . Multivariate analysis showed that nematode community structure differs among environments . The density , diversity and number of genera were significantly higher in the Armaz??m lagoon. Asimplified community structure of the Nematoda in the Channel and in the Tramanda?? lagoon probably reflects the largest instability found in both environments . This distinction was also visualized in relation to the feeding groups, in the Armaz??m lagoon there was a dominance of epigrowth feeder and microvores , while the deposit feeders and facultative predators prevailed in the Channel and Tramanda?? lagoon.A temporal variation was detected in the Nematoda genera and feeding groups. The high e s tdensities of organisms occurred in the summer. In the Tramanda?? -Armaz??m estuary ...

Spatial and temporal distribution in density and biomass of two Pseudodiaptomus species (Copepoda: Calanoida) in the Caet? river estuary (Amazon region - North of Brazil)

MAGALH?ES, Andr? Luiz Perez; COSTA, Rauqu?rio Andr? Albuquerque Marinho da; PEREIRA, Luci Cajueiro Carneiro; RIBEIRO, Marcilenia de Jesus da Silva; LIANG, Tsui Hua
Fonte: Universidade Federal do Pará Publicador: Universidade Federal do Pará
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
56.02%
A distribui??o espacial e temporal da densidade e biomassa dos cop?podos planct?nicos Pseudodiaptomus richardi e P. acutus, ao longo de um gradiente de salinidade, foi estudada no Estu?rio do Rio Caet? (Norte do Brasil) durante os meses de junho e dezembro de 1998 (esta??o seca) e fevereiro e maio de 1999 (esta??o chuvosa). A biomassa dos cop?podos foi estimada a partir de par?metros da regress?o baseada na rela??o entre o peso seco e o comprimento do corpo (prossoma) de organismos adultos. O Estu?rio do Rio Caet? caracterizou-se por uma grande varia??o espacial e sazonal na salinidade (0,8-37,2). A rela??o peso-comprimento para ambas as esp?cies de Pseudodiaptomus foi do tipo exponencial. Os valores de densidade e biomassa oscilaram entre 0,28-46,18 ind. m-3 e 0,0022-0,3507 mg DW. m-3 para P. richardi; e entre 0,01-17,02 ind. m-3 e 0,0005-0,7181 mg DW. m-3 para P. acutus. Os resultados revelaram que a contribui??o de P. richardi para a produ??o secund?ria no Estu?rio do Rio Caet? ? mais importante na zona limin?tica que em outras zonas onde foram dominantes os regimes eurihalino-polihalino. Contudo, para P. acutus n?o foi poss?vel observar de forma clara um padr?o de distribui??o espacial e temporal para a ?rea estudada.; ABSTRACT: Spatial and temporal density and biomass distribution of the planktonic copepods Pseudodiaptomus richardi and P. acutus along a salinity gradient were investigated in the Caet? River Estuary (North-Brazil) in June and December...

Reproductive biology and spatio-temporal distribution of Stellifer rastrifer, Stellifer naso and Macrodon ancylodon (Sciaenidae) in the Caet? estuary, northern Brazil

CAMARGO-ZORRO, Mauricio; ISAAC, Victoria Judith
Fonte: Universidade Federal do Pará Publicador: Universidade Federal do Pará
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
55.98%
O presente estudo caracteriza a distribui??o espa?o-temporal dos peixes com maior abund?ncia dentre a fam?lia Sciaenidae no estu?rio do rio Caet?, litoral norte do Brasil. Estima-se o comprimento de inicio da matura??o sexual, o comprimento m?dio da primeira matura??o sexual e os per?odos de desova. Para tal, durante os meses de outubro de 1996 a agosto de 1997, foram feitas 6 coletas bimestrais, atrav?s de arrastos de fundo. A partir de subamostras das esp?cies mais abundantes dentro das capturas, constru?ram-se distribui??es de freq??ncia de comprimento total, que foram analisadas por per?odo e local de coleta. De onze esp?cies de Sciaenidae coletadas, a maior contribui??o em abund?ncia de exemplares foi feita pelas esp?cies Stellifer rastrifer, Stellifer naso e Macrodon ancylodon. Determinou-se que a distribui??o espacial das esp?cies no sistema, est? relacionada com mudan?as peri?dicas na salinidade dentro do estu?rio e a sua din?mica de reprodu??o. Assim, os juvenis de S. rastrifer, S. naso e M. ancylodon distribu?ram-se nas ?reas mais internas do estu?rio e os adultos nas ?guas costeiras, com maiores teores de salinidade. Enquanto que M. ancylodon apresenta desovas peri?dicas durante outubro a fevereiro, S. rastrifer e S. naso apresentam desovas parceladas com dois picos mais intensos de outubro a dezembro e durante junho.; ABSTRACT: This study analyses the spatial and temporal distribution of the dominant Sciaenids in the Caet? estuary on the northern coast of Brazil. Samples were taken by otter trawls in four areas of the Caet? estuary between October 1996 and August 1997 six bimonthly. Stellifer rastrifer...

Temporal distribution of tuberculosis in the State of Amazonas, Brazil

Garrido,Marlucia da Silva; Bührer-Sékula,Samira; Souza,Alexandra Brito de; Ramasawmy,Rajendranath; Quincó,Patrícia de Lima; Monte,Rossicleia Lins; Santos,Lucilaide Oliveira; Perez-Porcuna,Tomás Maria; Martinez-Espínosa,Flor Ernestina; Saraceni,Valé
Fonte: Sociedade Brasileira de Medicina Tropical - SBMT Publicador: Sociedade Brasileira de Medicina Tropical - SBMT
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2015 EN
Relevância na Pesquisa
65.92%
Tuberculosis (TB) is one of the infectious diseases that contributes most to the morbidity and mortality of millions of people worldwide. Brazil is one of 22 countries that accounts for 80% of the tuberculosis global burden. The highest incidence rates in Brazil occur in the States of Amazonas and Rio de Janeiro. The aim of this study was to describe the temporal distribution of TB in the State of Amazonas. Between 2001 and 2011, 28,198 cases of tuberculosis were reported in Amazonas, distributed among 62 municipalities, with the capital Manaus reporting the highest (68.7%) concentration of cases. Tuberculosis was more prevalent among males (59.3%) aged 15 to 34 years old (45.5%), whose race/color was predominantly pardo (64.7%) and who had pulmonary TB (84.3%). During this period, 81 cases of multidrug-resistant TB were registered, of which the highest concentration was reported from 2008 onward (p = 0.002). The municipalities with the largest numbers of indigenous individuals affected were São Gabriel da Cachoeira (93%), Itamarati (78.1%), and Santa Isabel do Rio Negro (70.1%). The future outlook for this region includes strengthening the TB control at the primary care level, by expanding diagnostic capabilities, access to treatment...

Changes to the temporal distribution of daily precipitation

Rajah, K.; O'Leary, T.; Turner, A.; Petrakis, G.; Leonard, M.; Westra, S.
Fonte: American Geophysical Union Publicador: American Geophysical Union
Tipo: Artigo de Revista Científica
Publicado em //2014 EN
Relevância na Pesquisa
55.99%
Changes to the temporal distribution of daily precipitation were investigated using a data set of 12,513 land-based stations from the Global Historical Climatology Network. The distribution of precipitation was measured using the Gini index (which describes how uniformly precipitation is distributed throughout a year) and the annual number of wet days. The Mann-Kendall test and a regression analysis were used to assess the direction and rate of change to both indices. Over the period of 1976–2000, East Asia, Central America, and Brazil exhibited a decrease in the number of both wet and light precipitation days, and eastern Europe exhibited a decrease in the number of both wet and moderate precipitation days. In contrast, the U.S., southern South America, western Europe, and Australia exhibited an increase in the number of both wet and light precipitation days. Trends in both directions were field significant at the global scale.; Kailash Rajah, Tess O'Leary, Alice Turner, Gabriella Petrakis, Michael Leonard and Seth Westra

Spatial and temporal distribution of Pseudis minuta (Anura, Hylidae, Hylinae) and environmental variables related to its reproductive activity in Reserva Biológica do Lami, southern Brazil

Zank,Caroline; Di-Bernardo,Marcos; Maneyro,Raúl; Colombo,Patrick; Fusinatto,Luciana A.; Fonte,Luis Fernando M. da
Fonte: Fundação Zoobotânica do Rio Grande do Sul Publicador: Fundação Zoobotânica do Rio Grande do Sul
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2010 EN
Relevância na Pesquisa
65.96%
We studied the reproductive biology of a population of Pseudis minuta Günther, 1858 from Reserva Biológica do Lami (30º 15' S; 51º 05' W), Porto Alegre, southern Brazil. We assessed the spatial and temporal distribution of individuals (males, females, juveniles) and explored potential relationships with environmental variables. Field activities encompassed bimonthly surveys in three semi-permanent ponds, each one during approximately two days and two nights, from August 2004 to July 2005. We recorded differences in the sites used by males, females and juveniles, with males occupying deeper and more distant places from the border. The temporal distributions of individuals, calling sites and amplectant pairs indicated that the reproductive activity of P. minuta is related to some of the studied abiotic factors. Calling males presented statistical differences in relation to non-calling males for all daily abiotic variables analyzed (air temperature, water temperature, relative humidity and rainfall), as well as to monthly temperature and rainfall. The number of active males, females and juveniles was influenced by at least one of the daily or monthly environmental variables analyzed. We conclude that the reproduction in this species is seasonal and may be partially determined by abiotic factors.

Pattern of distribution and environmental influences on the Scienidae community of the Southeastern Brazilian coast

Schmidt, Thassya Christina dos Santos; Dias, June Ferraz
Fonte: Universidade de São Paulo. Instituto Oceanográfico Publicador: Universidade de São Paulo. Instituto Oceanográfico
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; Formato: application/pdf
Publicado em 01/06/2012 ENG
Relevância na Pesquisa
55.99%
The Sciaenids have among the highest species richness, numerical abundance and biomass of any family of fishes along the Brazilian coast. The aim of this study was to analyze the composition and spatial and temporal distribution of as well as the influence of temperature, salinity and depth on the sciaenid assemblage of Santos Bay. A total of 29,306 individuals belonging to 13 genera and 21 species were captured, between November 2004 and December 2005, with Stellifer rastrifer representing 70.4% of the total composition. Highest abundance and biomass occurred on the east side of the bay, and the highest species richness occurred near the mouth of the Santos Channel, which was also the site with least similarity to the other sites. Highest abundances occurred in April 2005 and lowest in September 2005. Key environmental factors influencing distribution of sciaenids were depth and temperature.; A família Sciaenidae apresenta elevada riqueza, abundância numérica e biomassa entre as famílias de peixe do litoral brasileiro. O objetivo deste estudo foi analisar a composição, distribuição espacial e temporal bem como a influência da temperatura, salinidade e profundidade na comunidade de Scienídeos da baía de Santos. Um total de 29.306 indivíduos pertencentes a 13 gêneros e 21 espécies foram capturados...

Reproductive biology and spatio-temporal distribution of Stellifer rastrifer, Stellifer naso and Macrodon ancylodon (Sciaenidae) in the Caeté estuary, northern Brazil

Camargo, Mauricio; Isaac, Victoria
Fonte: Universidade de São Paulo. Instituto Oceanográfico Publicador: Universidade de São Paulo. Instituto Oceanográfico
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; Peer-reviewed Article Formato: application/pdf
Publicado em 01/06/2005 ENG
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This study analyses the spatial and temporal distribution of the dominant Sciaenids in the Caeté estuary on the northern coast of Brazil. Samples were taken by otter trawls in four areas of the Caeté estuary between October 1996 and August 1997 six bimonthly. Stellifer rastrifer, Stellifer naso and Macrododon ancylodon presented the highest biomass out of eleven species of Sciaenidae caught. Minimum and mean length at first maturity were calculated and the main spawning periods determined. Changes in the spatio-temporal distribution of the three species were related to seasonal changes in estuarine salinity and spawning pulses. Larvae and juveniles of S. rastrifer, S. naso and M. ancylodon were found in the inner estuary while larger specimens were more abundant in the outer estuary with higher salinities. M. ancylodon spawned from October to February and rested from April to August whereas S. rastrifer and S. naso spawned throughout the year, though with two peaks, in October-December and June.; O presente estudo caracteriza a distribuição espaço-temporal dos peixes com maior abundância dentre a família Sciaenidae no estuário do rio Caeté, litoral norte do Brasil. Estima-se o comprimento de inicio da maturação sexual, o comprimento médio da primeira maturação sexual e os períodos de desova. Para tal...

Spatial and temporal distribution of fish in Palmas bay, Ubatuba, Brazil

Rocha, Maria Luiza Chisté Flaquer da; Fernandez, Wellington Silva; Paiva Filho, Alfredo Martins
Fonte: Universidade de São Paulo. Instituto Oceanográfico Publicador: Universidade de São Paulo. Instituto Oceanográfico
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; Formato: application/pdf
Publicado em 01/03/2010 ENG
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55.95%
Este estudo teve como objetivo analisar a composição e a abundância da fauna de peixes provenientes da enseada Palmas em Ubatuba, costa sudeste do Brasil. Os espécimes foram obtidos no verão e no inverno de 1992, utilizando-se uma rede de arrasto de fundo em três locais da enseada. Os arrastos foram realizados no período noturno e no período diurno. Foram obtidos dados de temperatura e salinidade da água para caracterização da massa de água predominante na região e amostras do sedimento para análise granulométrica. Foram capturadas 79 espécies de Actinopterygii, representadas por 7 656 indivíduos com peso total aproximado de 300 kg. As espécies mais abundantes foram Eucinostomus argenteus, Ctenosciaena gracilicirrhus, Haemulon steindachneri, Eucinostomus gula e Diapterus rhombeus e representaram mais de 73% da amostra. Os índices ecológicos utilizados, de uma maneira geral, não mostraram diferenças na composição das espécies quanto às variáveis abióticas analisadas. A análise multivariada empregada mostrou que as variações encontradas na distribuição da fauna de peixes foram associadas principalmente às diferenças intra-anuais de temperatura e salinidade, relacionadas à presença da Água Central do Atlântico Sul no verão na área de estudo. A análise também mostrou uma associação em relação ao tipo de fundo e uma menor associação em relação aos períodos do ciclo noite/dia.; The aim of this study was to analyze the distribution and abundance of the fish fauna of Palmas bay on Anchieta Island in southeastern Brazil. Specimens were caught in the summer and winter of 1992...