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handle: 10261/319508 , 10508/1456
En este estudio se presentan datos sobre oogénesis y proporción de sexos de Nereis diversicolor (O. F. Müller, 1776) durante los meses de abril 1993 a mayo 1994 en la costa suroeste de Portugal: Odeceixe (ODX), Aljezur (ALZ) y Carrapateira (CAR). Los resultados obtenidos demuestran que N. diversicolor presenta adultos con gametos a lo largo del periodo de estudio, y también una constante presencia de juveniles. Las medias (± el error estándar) del diámetro de los oocitos fueron, respectivamente: 136 ± 39 μm para ODX; 140 ± 37 μm para ALZ; y 130 ± 49 μm para CAR. La proporción de sexos siempre fue favorable para las hembras, siendo de 1: 2,9 para ODX, 1: 3,1 para ALZ y 1: 4,1 para CAR. En las aguas más calientes de CAR se observó maduración más rápida, tamaño reducido de los individuos y proporción de sexos fuertemente desviada hacia las hembras.
This study presents data on the oogenesis and sex ratio of Nereis diversicolor (O. F. Müller, 1776) from April 1993 to May 1994 on the southwestern coast of Portugal: Odeceixe (ODX), Aljezur (ALZ) and Carrapateira (CAR). The results obtained showed that N. diversicolor presented, during the entire period of study, adults with gametes as well as a constant presence of juveniles. The average (±SD) oocyte diameter were, respectively, 136 ± 39 μm ODX, 140 ± 37 μm for ALZ, and 130 ± 49 μm for CAR. The sex ratio was always favourable to females, being 1: 2,9 for ODX, 1: 3,1 for ALZ and 1: 4,1 for CAR. In the warmer waters of CAR, accelerated maturation, reduced size, and a strong female-biased sex ratio were observed.
Instituto Español de Oceanografía
reclutamiento, oogénesis, Proporción de sexos, Medio Marino, proporción de sexos, Nereis diversicolor, reproducción
reclutamiento, oogénesis, Proporción de sexos, Medio Marino, proporción de sexos, Nereis diversicolor, reproducción
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