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Title: | Toxicity of ammonia to the larvae of Penaeus indicus H. Milne Edwards |
Other Titles: | Not Available |
Authors: | Muthu,M S Jayasankar,P |
ICAR Data Use Licennce: | Not Available |
Author's Affiliated institute: | Not Available |
Published/ Complete Date: | 1983 |
Project Code: | Not Available |
Keywords: | Toxicity ammonia larvae Penaeus indicus |
Publisher: | CMFRI/ICAR |
Citation: | Not Available |
Series/Report no.: | Not Available |
Abstract/Description: | Short - term experiments revealed a progressive increase in tolerance of the larval stages of Penaeus indicus to ammonia. 24 - h LC30 values for nauplius, protozoea and mysis were 3.58 mg ammonia N / l (0.29 mg NH3 – N / I), 17.86 mg ammonia - Nil (0.95 mg NHyN) and( 46.01 mg ammonia - Nil O.lTmgNHj – N / I). respectively. 48 - h LCjo value for protozoea was 16.8 mg ammonia - N per liter (1.18 mg NH3 – N / I). Long - term chronic - toxicity experiments on nauplius to postlarva - 1 showed that the 9 - day incipient LCjo level was 11.99 ppm of ammonia - Nl (0.93 ppm NH3 - N). The ECjo (the concentration at which the percentage of larvae that metamorphosed to postlarvae was reduced to 50% of that of the controls) for ammonia was 3.23 ppm ammonia - N11 (0.25 ppm NH3 - N). "Safe level" of ammonia that should be maintained in the sea water used for larval rearing was calculated on the basis of incipient LC50 value as 1.2 mg ammonia – N / ! or 0.093 ppm NH3 – N / I. More sensitive estimate of "safe level" based on EC 50 value was 0.32 ppm ammonia - N|! or 0. 25 ppm NH3 - N. |
Description: | Not Available |
Type(s) of content: | Article |
Sponsors: | Not Available |
Language: | English |
Name of Journal: | Indian Journal of Fisheries |
Volume No.: | 30 |
Page Number: | 44531 |
Name of the Division/Regional Station: | Not Available |
Source, DOI or any other URL: | http://eprints.cmfri.org.in/474/1/Article_02.pdf |
URI: | http://krishi.icar.gov.in/jspui/handle/123456789/56065 |
Appears in Collections: | FS-CMFRI-Publication |
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