La pesquería de la almeja Gari solida es una actividad tradicional y creciente en los últimos años en Bahía Independencia - Pisco, conocer los aspectos biológicos y pesqueros de G. solida es una obligación, ya que brindará las herramientas para el manejo de este recurso, por ello, el objetivo de la presente investigación es comparar el crecimiento de Gari solida "almeja" en los bancos naturales (El Ancla, La Pampa y Pan de Azúcar) de la Bahía Independencia - Pisco durante el periodo Junio a Diciembre 2010. Se colectaron 5052 ejemplares mediante muestreos mensuales al azar, no selectivos a una profundidad de 6 a 16 m. en los tres bancos naturales de la almeja G. solida, los que fueron medidos y pesados individualmente. Se determinó la estructura de tallas mediante las frecuencias de longitud total agrupándolos en rango de 3mm, se determinó la tasa de crecimiento mediante la e...

The effect of six cryoprotective solutions based on MgCl2 and methanol, in addtion with sucrose and 10% Aloe vera gel or 10% egg yolk, on the sperm viability in spermatophore and sperm mass of Litopenaeus vannamei was evaluated. Besides, cooling rates of -0.5, -1 and -2 °C/min were used until temperature reached -35, -80 and -100 °C prior to immersion in liquid nitrogen. The sperm viability rate was determined by eosin-nigrosin staining. The results showed that the solutions based on MgCl2, sucrose plus egg yolk or Aloe vera gel better preserved sperm viability in spermatophore (82.8 ± 2.3% and 72.6 ± 3.1%) and in sperm mass (83.4 ± 2.5% and 76 ± 1.1%) without significant differences with the control group (p>0.05). The freezing curve showing less damage in spermatophore started from 25 °C and reached -35 °C with a rate of -1 °C/min using a cryoprotec...

The effect of six cryoprotective solutions based on MgCl2 and methanol, in addtion with sucrose and 10% Aloe vera gel or 10% egg yolk, on the sperm viability in spermatophore and sperm mass of Litopenaeus vannamei was evaluated. Besides, cooling rates of -0.5, -1 and -2 °C/min were used until temperature reached -35, -80 and -100 °C prior to immersion in liquid nitrogen. The sperm viability rate was determined by eosin-nigrosin staining. The results showed that the solutions based on MgCl2, sucrose plus egg yolk or Aloe vera gel better preserved sperm viability in spermatophore (82.8 ± 2.3% and 72.6 ± 3.1%) and in sperm mass (83.4 ± 2.5% and 76 ± 1.1%) without significant differences with the control group (p>0.05). The freezing curve showing less damage in spermatophore started from 25 °C and reached -35 °C with a rate of -1 °C/min using a cryoprotec...