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Crecimiento del ostión Crassostrea gigas (Thunberg, 1795) cultivado en el estero La Piedra, Sinaloa, México.

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  • معلومة اضافية
    • Alternate Title:
      Growth of the oyster Crassostrea gigas (Thunberg, 1795) cultured in estuary La Piedra, Sinaloa, Mexico.
    • الموضوع:
    • نبذة مختصرة :
      Growth and survival of the oyster Crassostrea gigas were evaluated from November 2004 to May 2005 at the estuary La Piedra (Sinaloa, Mexico) using plastic trays attached to long lines. A batch of 10,000 spat (3.5 ± 0.5 mm, initial height) was used in the experiment. The mean values for the water parameters were: Temperature, 22.2 ± 3.2° C; dissolved oxygen, 6.8 ± 2.3 mg/l; and salinity, 32.8 ± 3.1 ups. The mean chlorophyll a concentration was 3.2 ± 0.8 mg/m³. Oyster reached the height of 0.26 mm/day and a weight of 0.42 g/day. The condition index decreased at the end of the culture from maximal 9.54 to 8.68. The weight = -15.4352 + 0.7968 height (r² = 88.29; = 12.88; F = 37.71; p = 0.0017) described the Weight-Length of C. gigas. Significative differences were found for the Weight and Condition index (p = 0.0023). The final mortality was 12%. The results obtained pointed out that fall-spring season is adequate time for culturing Pacific oysters C. gigas at estuary La Piedra (Sinaloa, Mexico), due to attaining its commercial size (109.8 mm and 88.7 g) after seven months. [ABSTRACT FROM AUTHOR]
    • نبذة مختصرة :
      Se realizó un ciclo de engorda (noviembre 2004-mayo 2005) con el ostión Crassostrea gigas en el estero La Piedra, Guasave (Sinaloa, México), usando canastas suspendidas en una línea madre para evaluar su crecimiento y supervivencia. Se utilizaron 10,000 semillas (3.5 ± 0.5 mm de altura inicial). Los valores promedios de los parámetros del agua fueron: temperatura, 22.2 ± 3.2°C; oxígeno disuelto, 6.8 ± 2.3 mg/l; y salinidad, 32.8 ± 3.14 ups; mientras que el promedio de la concentración de clorofila a fue de 3.2 ± 0.8 mg/m³. Los animales mostraron un crecimiento de 0.26 mm/día para la altura de su concha y 0.42 g/día de peso corporal. El índice de condición mostró un ligero descenso en el último mes de cultivo de 9.54 a 8.68. La fórmula: Peso = -15.4352 + 0.7968 Altura (r = 88.29; = 12.88; F = 37,71; P = 0.0017) describe la relación entre el peso y la altura de C. gigas en el cultivo. Se obtuvieron diferencias significativas entre el peso e índice de condición (P = 0.0023). Se registró una mortalidad total de 12%. Los resultados obtenidos indican que la temporada otoño-primavera es favorable para el cultivo del ostión del Pacífico C. gigas en el estero La Piedra, Guasave, Sinaloa, ya que alcanzó la talla comercial (109.8 mm y 88.7 g) en siete meses de cultivo. [ABSTRACT FROM AUTHOR]
    • نبذة مختصرة :
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