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Registros recuperados: 10
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Comparação do peso dos quelípodos e crescimento em duas espécies de "sirís" do gênero Callinectes (Brachyura, Portunidae) BABT
Guerrero-Ocampo,Cecilia Margarita; Negreiros-Fransozo,Maria Lucia; Costa,Tânia Marcia.
Neste trabalho, as espécies C. danae e C. ornatus foram comparadas quanto ao peso dos quelípodos. Os siris foram coletados com 2 redes de arrasto do tipo "otter trawl" na Enseada de Ubatuba (23° 26' S e 45° 02' W). As constantes alométricas obtidas foram analisadas por meio da função potência (Y = aXb ). As espécies apresentaram diferentes graus alométricos para cada sexo. A relação PQ X PC apresentou alometria positiva em ambas espécies, porém os machos apresentam maior alometria positiva do que as fêmeas. C. danae apresenta maior alometria positiva para os quelípodos do que C. ornatus. O fato de C. danae atingir maior porte e possuir quelípodos maiores indica que esta espécie tem potencial para o cultivo.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Siris; Quelípodo; Crescimento relativo.
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131998000400013
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Comparative analysis of the relative growth of Uca rapax (Smith) (Crustacea, Ocypodidae) from two mangroves in São Paulo, Brazil Zoologia
Castiglioni,Daniela da Silva; Negreiros-Fransozo,Maria Lucia.
A study on the relative growth of two populations of Uca rapax (Smith, 1870) was performed primarily to determine the size at onset sexual maturity. The species was sampled monthly in Itamambuca (23º24'43"S and 45º00'73"W) and Ubatumirim (23º20'17.8"S and 44º53'2.2"W) mangroves. Carapace width (CW) and length (CL), abdomen width (AW), major cheliped propodus length (PL) and height (PH) for each sex, and gonopod length (GL) for males were measured with a calliper (0.01 mm). Allometric analyses were used to estimate size at maturity. The relationships that most precisely indicated the size at onset of sexual maturity were AW vs. CW, for females and PL vs. CW, for males. Males and females are mature, respectively at 15.2 and 12.1 mm CW in samples from...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allometric growth; Morphologic maturity.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752004000100023
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Gonad development in females of fiddler crab Uca rapax (Crustacea, Brachyura, Ocypodidae) using macro and microscopic techniques Iheringia, Sér. Zool.
Castiglioni,Daniela da Silva; Negreiros-Fransozo,Maria Lucia; Greco,Laura S. López; Silveira,Aron F.; Silveira,Sérgio O..
The morphology of the ovaries in Uca rapax (Smith, 1870) was described based on macroscopic and microscopic analysis. Females were collected in Itamambuca mangrove, Ubatuba, state of São Paulo, Brazil. In the laboratory, 18 females had their ovaries removed and prepared for histology. Each gonad developmental stage was previously determined based on external and macroscopic morphology and afterwards each stage was microscopically described. The ovaries of U. rapax showed a pronounced macroscopic differentiation in size and coloration with the maturation of the gonad, with six ovarian developmental stages: immature, rudimentary, developing, developed, advanced and spent. During the vitellogenesis, the amount of oocytes in secondary stage increases in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Macroscopic analysis; Histological analysis; Oogonias; Primary and secundary oocytes; Uca rapax.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212007000400022
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Larval development of Hexapanopeus paulensis Rathbun, 1930 (Crustacea, Brachyura, Xanthidae) under laboratory conditions Zoologia
Fransozo,Adilson; Mantelatto,Fernando Luiz Medina; Negreiros-Fransozo,Maria Lucia.
Four zoeal stages and one megalopa stage of Hexapanopeus paulensis Rathbun, 1930 were obtained from eggs of ovigerous females from the northern coast of São Paulo State, Brazil. The experiments were performed in a climatically controlled room at 24 ±1 ºC at a salinity of 34.5%, and the animals were fed with newly hatched Artemia salina nauplii. All larval stages are illustrated and described in detail. The complete larval development consists of 4 zoeal stages and 1 megalopal stage. The main morphological characters that allow the identification of the zoeae and megalopa of H. paulensis are analyzed with respect to the other species of Xanthidae's family from southern and southeastern Brazilian coast.
Tipo: Info:eu-repo/semantics/article
Ano: 1990 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751990000200002
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Physiologic sexual maturity of the fiddler crab Uca rapax (Smith, 1870) (Crustacea, Ocypodidae) from two mangroves in Ubatuba, Brazil BABT
Castiglioni,Daniela da Silva; Negreiros-Fransozo,Maria Lucia.
The gonad development of Uca rapax was studied to achieve the size at onset of its sexual maturity. Crabs were sampled from April/2001 to March/2002 in the Itamambuca and Ubatumirim mangroves in Ubatuba, São Paulo, Brazil. The specimens were grouped in 10 size classes. Juveniles and adult crabs frequencies were assessed for each class. The size of carapace width in which 50% of males and females were considered mature was 14.8 and 12.1 mm (Itamambuca) and 13.6 and 11.4 mm (Ubatumirim), respectively for males and females. Males matured at higher sizes than females, probably due to a major investment in their somatic growth, while females spend their energy in the reproductive process, saving energy for eggs' production.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Maturity; Uca rapax; Ocypodidae; Mangroves.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000300009
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Population dynamic of Sesarma rectum (Crustacea, Brachyura, Sesarmidae) from a muddy flat under human impact, Paraty, Rio de Janeiro, Brazil Iheringia, Sér. Zool.
Silva,Stella Maris Januário da; Hirose,Gustavo Luis; Negreiros-Fransozo,Maria Lucia.
A population of Sesarma rectum Randall, 1840 under the influence of human impact was studied. Monthly sampling (CPUE, two people during 30 min) took place from August/2001 to July/2002 at an impacted muddy flat in Paraty city, State of Rio de Janeiro (23º13'S, 44º42'W). At the laboratory, specimens were classified by sex and measured with a vernier caliper (0.01 mm). The size at the beginning of the sexual maturity was obtained by means of different techniques: in the case of males it was used the allometric procedure and the macroscopic analysis of gonads wile for females, the size of the smallest ovigerous female was also considered. The population structure was evaluated by means the analysis of the variations in the modes of the size frequency...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sexual maturity; Allometric growth; Population structure; Fecundity.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212007000200010
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Relative growth and morphological sexual maturity of Chasmagnathus granulatus (Crustacea, Varunidae) from a mangrove area in southeastern Brazilian coast Iheringia, Sér. Zool.
Gregati,Rafael Augusto; Negreiros-Fransozo,Maria Lucia.
The relative growth and morphological sexual maturity of Chasmagnathus granulatus Dana, 1851 are presented for the first time to a mangrove population. The crabs were obtained during low tide periods, in the mangrove of Jabaquara Beach, Paraty, Rio de Janeiro, Brazil. All crabs in intermolt stage were sexed and had their body parts measured as follows: body height (BH), carapace length (CL) and width (CW), major cheliped propodus height (PH) and length (PL) for each sex, gonopod length (GL) and abdomen width (AW) for males and females, respectively. The relative growth was described using the allometric equation y=ax b and the size at onset sexual maturity was achieved using the software Mature I. The size of specimens ranged from 4.1 mm to 39.5 mm CW. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Grapsoidea; Semiterrestrial crabs; Morphometric relationships; Allometric growth.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212007000300009
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Relative growth of Uca burgersi (Crustacea, Ocypodidae) from two mangroves in the southeastern Brazilian coast Iheringia, Sér. Zool.
Benetti,Aline Staskowian; Negreiros-Fransozo,Maria Lucia.
The relative growth of the fiddler crab Uca burgersi Holthuis, 1967 was analyzed in two populations from different mangroves (Ubatumirim and Cavalo rivers) in the southeastern Brazilian coast, monthly sampled from May, 2001 to April, 2002. The population from a high productivity level mangrove reaches the sexual maturity in larger sizes than the population from a less productive site. This results can be attributed to the greater amount of nutrients found in the Cavalo than in Ubatumirim mangrove.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Relative growth; Uca; Size maturity; Mangrove.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212004000100012
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Reproductive cycle of the swimming crab Portunus spinimanus Latreille (Crustacea, Decapoda, Brachyura) from Ubatuba, São Paulo, Brazil Zoologia
Santos,Sandro; Negreiros-Fransozo,Maria Lucia.
This study analyses some reproductive aspects of Portunus spinimanus Latreille, 1819, a crab usually commercialized in Ubatuba region. Monthly otter-trawl collections were taken for two years along the northern coast of São Paulo State, Brazil. The reproductive period was studied based on the frequency of ovigerous females in the population along the year; the frequency of physiologically mature swimming crabs and the type of spawn. The condition of development of ovigerous females ovary was associated with the stage of eggs development. This species presents continuous reproduction in Ubatuba region and total spawn, but with successive broods, which suggests a multiple spawn during the reproduction period.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Portunus spinimanus; Reproduction; Spawn; Brazilian coast.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000400025
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Reproductive pattern comparison of Uca thayeri Rathbun, 1900 and U. uruguayensis Nobili, 1901 (Crustacea, Decapoda, Ocypodidae) BABT
Costa,Tânia Marcia; Silva,Stella Maris Januário; Negreiros-Fransozo,Maria Lucia.
Ovigerous females of Uca thayeri and U. uruguayensis were used to achieve and compare their reproductive pattern. The females mean size was 6.6 ± 0.8mm for U. uruguayensis and 17.3± 4.4mm for U. thayeri. The mean fecundity obtained for U. uruguayensis was 1883 ± 490 eggs (N = 27) and for U. thayeri was 31068 ± 11186 eggs (N = 31). The differences observed in reproductive pattern of U. thayeri and U. uruguayensis suggest an adaptive strategy by each species: U. thayeri presented seasonal reproduction with a pronounced intensity from January to March and higher fecundity, while U. uruguayensis reproduction was continuous all year round, but with lower fecundity.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crustacea; Fiddler crab; Fecundity; Uca thayeri; U. uruguayensis; Reproductive pattern.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000100014
Registros recuperados: 10
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