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Title: <smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"> Toxicity of Hg (II) to prawns <i style="">Penaeus monodon </i>and <i style="">Penaeus indicus </i>(Crustacea: Penaeidae) from Rushikulya estuary, Bay of Bengal </smarttagtype>
Authors: Das, Snehalata
Sahu, B. K.
Keywords: Prawn
relative sensitivity
Issue Date: Dec-2002
Publisher: CSIR
Abstract: Penaeid prawns belonging to size 35-55 mm TL and 55-75 mm TL were exposed to the five concentrations of Hg (II) in salinities 5, 15, and 25 <i style="">‰</i>. The values of LC<sub>50</sub> with 95<sub> </sub>% confidence limit<sub> </sub>for 96 hours were 0.036 (0.032-0.041) and 0.042 (0.036-0.044) mg l<sup>-1</sup> for large size groups of<i style=""> P. monodon</i> and <i style="">P. indicus</i> respectively. The LC<sub>50</sub> decreased with increase of time period. Small size groups were more sensitive to mercury at lower salinities while large size groups were more tolerant at high salinities. <i style="">Penaeus monodon </i>was more sensitive to mercury than <i style="">P. indicus </i>at each salinity. Threshold limit for <i style="">P. monodon </i>and <i style="">P. indicus </i>was 0.016 and 0.024 mg l<sup>-1</sup> respectively.
Description: 337-339
ISSN: 0379-5136
Appears in Collections:IJMS Vol.31(4) [December 2002]

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