Consulta: creatorFacets:"Pinheiro,Marcelo Antonio Amaro"
Registros recuperados: 7
Data/hora: 02/06/2024 09:09:03

Biologia populacional de Emerita brasiliensis Schmitt (Crustacea, Hippidae) na Praia Vermelha do Norte, Ubatuba (São Paulo, Brasil)
Provedor de dados: Zoologia
Autores: Nakagaki,Jelly Makoto; Pinheiro,Marcelo Antonio Amaro.
Emerita brasiliensis Schmitt, 1935 is a common mole crab called "tatuíra" in Brazil, with distribution from Espírito-Santo State (Brazil) to Buenos Aires Province (Argentina). Specimens were collected bimonthly from May/1992 through March/1993 with 4mm siffers mesh, in the intertidal region at Vermelha do Norte Beach, Ubatuba, São Paulo, Brazil. The animals were sexed and measured with a precision caliper of 0.1 mm (Cl = carapace length). Males presented cl amplitude from 3.4-17.3mm (13.2±2.1mm), and females from 13.8-26.3mm (20.5±1.8mm), showing a well-defined sexual dimorfism for this variable. The population presented a smaller incidence of males in relation to females (0.54:1.00), however in May/1992 an inverse pattern occurred (1.84:1.00). Ovigerous...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hippidae; Emerita brasiliensis; Population structure; Sex-ratio.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000600010

Chromatic alteration in Arenaeus cribrarius (Lamarck) (Crustacea, Portunidae): an indicator of sexual maturity
Provedor de dados: Zoologia
Autores: Pinheiro,Marcelo Antonio Amaro; Taddei,Fabiano Gazzi.
Some individuals of the species Arenaeus cribrarius (Lamarck, 1818) bear a characteristic pink abdomen, which is notably different from the usual white coloration. The incidence of this chromatic alteration was determined for a single population and its relation with other individual variables were examined. The individuals were monthly collected from May, 1991 to April, 1993, in Ubatuba, São Paulo, with the aid of a shrimp fishery boat provided with double-rig trawling nets. All specimens were sexed, measured (CW = carapace width), distributed in 10-mm size classes and classified according to growth phase (juvenile and adult), molting condition and development stage of gonads. The occurrence of pink-colored morphs was also recorded. From a total of 2,096...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachyura; Portunidae; Reproduction; Coloration.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000400006

Fertilidade do caranguejo de mangue Ucides cordatus (Linnaeus) (Crustacea, Brachyura, Ocypodidae), em Iguape (São Paulo, Brasil)
Provedor de dados: Zoologia
Autores: Hattori,Gustavo Yomar; Pinheiro,Marcelo Antonio Amaro.
A total of 58 Ucides cordatus (Linnaeus, 1763) ovigerous females in final embryonic stage were collected in mangrove forest at Iguape (São Paulo). Each female were kept in laboratory until the larvae hatching and had their carapace width (CW) measured with caliper (0.05 mm) and the larval number (LN) calculated by volumetric method. The hatching rates (HR) were calculated for each animal's size class (5 mm). The values of LN and CW obtained were subjected to regression analyses and the best fitting model was chosen by comparing the obtained determination coefficients (R²). The fertility varied from 71,200 to 220,800 larvae (147,169 ± 32,070 larvae), corresponding to 41.7 to 76.8 mm CW (63.7±7.9 mm), respectively. The relationship LNxCW was expressed by the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachyura; Crustacea; Fertility; Ocypodidae; Reproduction; Ucides.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000200022

Dimensionamento e sobreposição de nichos dos portunídeos (Decapoda, Brachyura), na Enseada da Fortaleza, Ubatuba, São Paulo, Brasil
Provedor de dados: Zoologia
Autores: Pinheiro,Marcelo Antonio Amaro; Fransozo,Adilson; Negreiros-Fransozo,Maria Lúcia.
The niche breadth of the Portunidae and their overlap on the subtidal sediments of Fortaleza bay, Ubatuba (São Paulo) was analyzed. Samples were made monthly from November/1988 to October/1989, inseven areas of the bay using a shrimp fishery boat equipped with two otter-trawls. Each area was characterized based on environmental factors such as depth, temperature, salinity, dissolved oxygen, organic matter and granulometric composition of the sediment. The number of individuais of each species was registered to each area (resource). Levins's standardized measure (BA) and niche percentage were calculated. Five species of swimming crabs were recorded in this study: Callinectes ornatus Ordway, 1863, Arenaeus cribrarius (Lamarck, 1818), Portunus spinimanus...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Portunidae; Distribution; Niche; Sediment; Swimming crab.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000200010

Relative growth of the mangrove crab Ucides cordatus (Linnaeus, 1763) (Crustacea, Brachyura, Ocypodidae) at Iguape, São Paulo, Brazil
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Pinheiro,Marcelo Antonio Amaro; Hattori,Gustavo Yomar.
A total of 2,130 individuals of Ucides cordatus (1,255 males and 875 females) were captured in a mangrove forest at Iguape, São Paulo, Brazil. For each crab, the following body structures were measured: carapace (width = CW; length = CL; depth = CD), 5th abdominal somite (AW), major chelar propodus (length = PL; width = PW; depth = PD), and 1st and 2nd gonopod pairs (length = GL1 and GL2). The Student "t" and Snedecor "F" tests were used to verify any changes in growth allometric rates during ontogeny. The relationships CLxCW, PLxCW (for both sexes), GL1xCW and GL2xCW (males) and AWxCW (females), showed a better fit by two equations for the juvenile and adult phases (p&lt;0.01). The inflexion point size between regression lines, indicated by each...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Relative growth; Brachyura; Ocypodidae; Ucides.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000600016

Size at morphological maturity of Ucides cordatus (Linnaeus, 1763) (Brachyura, Ocypodidae) in the Laranjeiras Bay, Southern Brazil
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Dalabona,Glaucia; Silva,Jayme de Loyola e; Pinheiro,Marcelo Antonio Amaro.
Morphometry and maturity of Ucides cordatus were analyzed with males and females collected during one year on a monthly basis at Laranjeiras Bay, Paraná State, Brazil. Carapace length, chelipeds propodus length and abdominal width were measured and related to carapace width to verify sexual dimorphism and size at morphological maturity of each sex. Carapace and propodus length of larger and smaller cheliped presented difference between sexes, confirming the use of both as secondary sexual characters. MATURE II program indicated 44mm and 43mm of carapace width to represent the size at sexual maturity of males and females, respectively.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Reproduction; Relative growth; Fishery resource.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000100018

Length-weight relationship and condition factor of the mangrove crab Ucides cordatus (Linnaeus, 1763) (Crustacea, Brachyura, Ucididae)
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Pinheiro,Marcelo Antonio Amaro; Fiscarelli,Ana Gláucia.
The relationship of wet weight (WT) to cephalothorax width (CW) and temporal and seasonal variations in the condition factor were analyzed for each sex of the mangrove crab Ucides cordatus, using specimens collected monthly from September 1998 through September 2000, at Iguape, state of São Paulo. The WT/CW relationship, determined by the regression analysis and the condition factor were evaluated individually, monthly and seasonally, for each sex. The WT/CW relationship indicated isometric growth in males and negative allometric growth in females. Body weight was higher in males than in females of equivalent size and this difference was associated with the males' faster growth and heavier chelipeds. On the other hand, the means for condition factor were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fattening; Mangrove crab; Mangrove forest; Ucides cordatus; Weight increase.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000200017