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Effects of sudden stress due to heavy metal mercury on benthic foraminifer Rosalina leei: Laboratory culture experiment

DRS at CSIR-National Institute of Oceanography

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Title Effects of sudden stress due to heavy metal mercury on benthic foraminifer Rosalina leei: Laboratory culture experiment
 
Creator Nigam, R.
Linshy, V.N.
Kurtarkar, S.R.
Saraswat, R.
 
Subject Benthic foraminifera
Culture experiment
Pollution
Rosalina leei
 
Description Laboratory culture experiments were carried out to understand the response of benthic foraminifer Rosalina leei to gradual as well as sudden addition of heavy metal mercury into the media. When mercury was added suddenly, specimens did not show any change in morphology during the initial 40 days. However, later on, out of all the specimens subjected to mercury concentrations up to 150 ng/l, 75% developed deformities, whereas all the specimens subjected to 150–275 ng/l Hg concentrations, had deformed chambers. All specimens kept at 300 ng/l Hg concentration died within 20 days. In addition to this, irregularities were also observed in the rate of reproduction, number of juveniles produced and the survival rate of the juveniles. Where as in an earlier experiment where Hg concentration was increased gradually, irregularities in the newly added chambers were noticed only in case of specimens subjected to very high (180 ng/l) Hg concentration. However, during this experiment, growth was found to be inversely proportional to the mercury concentration
 
Date 2009-11-10T11:27:38Z
2009-11-10T11:27:38Z
2009
 
Type Journal Article
 
Identifier Marine Pollution Bulletin, vol.59(8-12); 362-368
http://drs.nio.org/drs/handle/2264/3422
 
Language en
 
Rights An edited version of this paper was published by Elsevier. Copyright [2009] Elsevier
 
Publisher Elsevier