The acute toxicity of four heavy metals (Cd++, Cr+++, Cu++, and Zn++) to the juvenile spotted brown shrimp (Penaeus brasiliensis)

ARTIGOS

The acute toxicity of four heavy metals (Cd⁺⁺, Cr⁺⁺⁺, Cu⁺⁺, and Zn⁺⁺) to the juvenile spotted brown shrimp (Penaeus brasiliensis)

K. S. Chung

Instituto Oceanógrafico, Universidad de Oriente, Cumaná, Venezuela

SYNOPSIS

The static biossays were performed to determine lethal concentration (LC₅₀) values of four heavy metals (Cd⁺⁺, Cr⁺⁺⁺. Cu⁺⁺. and Zn⁺⁺) of spotted brown shrimp (Penaeus brasiliensis) The test animals were collected from the Laguna of Restinga, Nueva Esparto, and were acclimated in the laboratory condition for 11-21 days. Temperature and salinity were 22 ºC and 36 ppt, respectively. The LC₅₀ values (mg/l) determined by probability-logarithm transformation were as follows-cadmium: 38 (24 -h), 21 (48 -h), and 12 (60 -h);chromium:40 (48 -h), 23 (60 -h), 13 (86 -h), and 10 (96 -h); copper: 24 (48 -h), 19 (60 -h), 16 (72 -h), 14 (86 -h), and 10 (144 -h); and zinc: 69 (24 -h), 25 (36 -h), 15 (48 -h) and 8 (60 -h). The LC₅₀ values of 48 -h and 60 -h indicate that the most toxic heavy metals to P. brasiliensis in order are zinc, cadmium, copper, and chromium.

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Publication Dates

• Publication in this collection
  06 June 2012
• Date of issue
  1980