Fecundity of the mangrove crab Ucides cordatus (Linnaeus, 1763) (Brachyura, Ocypodidae)

Females of the mangrove crab Ucides cordatus were collected in a monthly basis along a 2-year period at the mangrove areas of Iguape, SP, Brazil. Ovigerous individuals were measured (CW, carapace width) and weighed (WW, wet weight). Each brood was weighed (WWE, wet weight of eggs), dried (DWE, dry weight of eggs) and the number of eggs (EN) was recorded. Scatter plots for the relationships EN/CW, EN/WW and EN/WWE were produced, and the data were subjected to regression analysis. Relative average fecundity (F 1) was calculated in different seasons and compared to verify if there were any temporal variation of reproductive intensity. Fecundity in U. cordatus varied from 36.081 to 250.566 eggs according to the size-dependent relationship EN = 15.27CW 2.24 (N = 66; R 2 = 0.69; p<0.001). The other expressions obtained for the relationships were: EN = 3797.6WW 0.813 (N = 56; R 2 = 0.72; p<0.001); EN = 29226WWE 0.775 (N = 54; R 2 = 0.70; p<0.001); and EN = 1093586DWE 0.769 (N = 66; R 2 = 0.86; p<0.001). Ovigerous females were found only during spring and summer, and relative average fecundity differed between these seasons. Relative average fecundity was higher in spring and relative frequency of ovigerous females was higher during summer. Overall reproductive intensity was similar between these seasons. The observed trends are regarded to be related to temperature and photoperiod variations.

Relative growth of the mangrove crab Ucides cordatus (Linnaeus, 1763) (Crustacea, Brachyura, Ocypodidae) at Iguape, São Paulo, Brazil

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 2 nd 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<0.01). The inflexion point size between regression lines, indicated by each morphometric relationship, allowed to propose four morphotypes for U. cordatus. Males were classified in juvenile (CW le; 32 mm), pre-puberty (32 ≤ CW ≤ 51 mm), sub-adult (51 ≤ CW ≤ 59 mm) and adult (CW > 59 mm). Females showed a similar size interval: (juvenile CW ≤ 39 mm, pre-puberty 39 ≤ CW ≤ 53 mm, sub-adult 53 ≤ CW ≤ 58 mm, adult CW > 58 mm).

Guatemala, censo experimental de 1970: aplicacion de las tecnicas del profesor William Brass para estimar la fecundidad y la mortalidad

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Costa Rica (Canton Grecia) 1968 y Chile 1960: algunas consideraciones del metodo del profesor William Brass para estimar fecundidad

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Cuatro lecciones de William Brass

Conferencias dictadas por el profesor Brass en visita a CELADE, 2-5 noviembre 1975

Aplicaciones de los metodos para estimar la cabalidad de los registros a partir de la distribucion por edades de las muertes: a).de William Brass; b).de Samuel Preston; resumen del estudio

A la informacion sobre la distribucion por edades en las muertes registradas a partir de la edad de 5 anos en Chile, Costa Rica, Guatemala, Panama y Peru, se aplican los dos metodos propuestos para evaluar la cabalidad de los registros de defunciones. Los resultados obtenidos de aplicar estos metodos se presentan en graficos y cuadros, con aplicaciones hechas en los 5 paises

Bolivia: estimacion de la mortalidad a partir de la distribucion por edades de las muertes, 1951. Metodo de William Brass

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Costa Rica: estimacion de la mortalidad masculina adulta a partir de la orfandad de padre por medio de tecnicas de William Brass

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Determinacion de la mortalidad por medio de las tecnicas de William Brass, con especial referencia al sistema logito

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Peru: comprobacion del metodo de William Brass sobre la estimacion del nivel de la mortalidad en 1940, a partir de la proporcion: hijos sobrevivientes

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Dissolução e aleatoriedade: a estética do romance na obra Almoço nu de William S. Burroughs. -

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Caracterização e seleção de isolados de Bacillus thuringiensis efetivos contra Sitophilus oryzae L., 1763

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Aplicaciones de los métodos para estimar la cabalidad de los registros a partir de la distribución por edades de las muertes: a) de William Brass, b) de Samuel Preston; resumen

Documento de trabajo para el Panel de América Latina, Santiago, 16-20 julio 1979