With the aim to determine the processes which generated the scallop (Argopecten purpuratus) mortality event on June 6, 2000, natural and anthropogenic environmental conditions in Paracas bay (Pisco, Per˙) during a period of fishery industrial activity were analysed between May 17 and June 13, 2000. Daily surveys of oceanographic variables such as temperature, oxygen, phytoplankton volume and aquatic quality variables such as oil and greases, total suspended solids, BOD5 , pH, sulphurs and thermotolerant coliforms, were carried out in 5 stations inside Paracas bay. Since mid of May, high contents of oil and greases coming from fishery effluents were detected. At the end of May, the presence of a red tide was observed associated with an increase in total suspended solids, pH and dissolved oxygen, especially off Atenas and El Chaco. Beginning June in surface waters, a reduction in total su...

Con la finalidad de determinar los procesos que desencadenaron el evento de mortalidad de concha de abanico (Argopecten purpuratus) el 6 de junio del 2000, se analizaron las condiciones ambientales naturales y antropogénicas en la Bahía de Paracas (Pisco, Perú) durante el período de actividad pesquera industrial pesquera, entre el 17 de mayo y el 13 de junio del 2000. Se evaluaron diariamente las variables oceanográficas de temperatura, oxígeno disuelto, volumen de fitoplancton y variables de calidad acuática, aceites y grasas, sólidos suspendidos totales, DBO5 , pH, sulfuros y coliformes termotolerantes, en 5 estaciones de la Bahía de Paracas. Desde mediados de mayo, se registraron altos contenidos de aceites y grasas provenientes de efluentes pesqueros. A fines de mayo se observó la presencia de una marea roja asociada a un incremento en los sólidos suspendidos totales, pH y...