2010
DOI: 10.1590/s1984-46702010000500004 View full text |Buy / Rent full text
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Abstract: ABSTRACT. This study evaluated the relationships of certain allometric measurements in Melanoides tuberculatus Muller, 1774, in order to develop a statistical model to estimate the biomass of this mollusc species. We measured the total length and aperture of 70 shells. These measurements were correlated with the biomass values to construct exponential and power-function models, and both models showed high coefficients of determination. The exponential model was the better biomass predictor, with a coefficient … Show more

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“…La metodología de recolección de los moluscos se efectuó mediante el tubo de Penchaszadeh, el cual tiene una longitud de 1 m con un diámetro de 15 cm, la profundidad de incorporación en el sustrato fue hasta los 20 cm (0,32 m 2 ), obteniendo un volumen de 0,003 m³ (Penchaszadeh, 1971;Bijoy, 2016), posteriormente la muestra fue tamizada en una malla de 1000 um (Iannacone et al, 2003). El esfuerzo de muestreo fue uniforme, representado por tres réplicas en cada estación (Lindenmayer & Likens, 2010;Silva et al, 2010;Vizcardo & Gil-Kodaka, 2015), procurando abarcar diversos microhábitats (Vivar et al, 1996;Maltchik et al, 2010) y zonas establecidas para el humedal (Pulido & Bermudez, 2018).…”
Section: Materials Y Métodosunclassified
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“…La metodología de recolección de los moluscos se efectuó mediante el tubo de Penchaszadeh, el cual tiene una longitud de 1 m con un diámetro de 15 cm, la profundidad de incorporación en el sustrato fue hasta los 20 cm (0,32 m 2 ), obteniendo un volumen de 0,003 m³ (Penchaszadeh, 1971;Bijoy, 2016), posteriormente la muestra fue tamizada en una malla de 1000 um (Iannacone et al, 2003). El esfuerzo de muestreo fue uniforme, representado por tres réplicas en cada estación (Lindenmayer & Likens, 2010;Silva et al, 2010;Vizcardo & Gil-Kodaka, 2015), procurando abarcar diversos microhábitats (Vivar et al, 1996;Maltchik et al, 2010) y zonas establecidas para el humedal (Pulido & Bermudez, 2018).…”
Section: Materials Y Métodosunclassified
“…The most commonly used method deals with the quantification of a shell’s linear dimensions such as shell length, shell width or number of whorl increments, which are then plotted against time (e.g., Kobayashi & Hadfield, 1996 ; Sulikowska-Drozd, 2011 ). Although these measurements are good estimators of the overall growth of the animal’s soft body (measured in weight; Oosterhoff, 1977 ; Chow, 1987 ; Elkarmi & Ismail, 2007 ; Silva, Molozzi & Callisto, 2010 ), they can hardly be linked with the accretionary growth process and spiral geometry of the shell. In addition, shell growth may be episodic because of different seasons, diurnal rhythms, or periods of activity and inactivity ( Linsley & Javidpour, 1980 ).…”
Section: Introductionmentioning
“…Kobayashi & Hadfield, 1996;Sulikowska-Drozd, 2011). Although these measurements are good estimators of the overall growth of the animal's soft body (measured in weight; Oosterhoff, 1977;Chow, 1987;Elkarmi & Ismail, 2007;Silva, Molozzi & Callisto, 2010), they can hardly be linked with the accretionary growth process and spiral geometry of the shell. In addition, shell growth may be episodic because of different seasons, diurnal rhythms, or periods of activity and inactivity (Linsley & Javidpour 1980).…”
Section: Introductionmentioning