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Assessing the effect of calcein incorporation on physiological processes of benthic foraminifera

DRS at CSIR-National Institute of Oceanography

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Title Assessing the effect of calcein incorporation on physiological processes of benthic foraminifera
 
Creator Kurtarkar, S.R.
Saraswat, R.
Nigam, R.
Banerjee, B.
Mallick R.
Naik, Dinesh K.
Singh, D.P.
 
Subject physiological processes
Foraminifera
benthic foraminifera
 
Description Rosalina sp. was incubated in seawater spiked with calcein (5 mg/l to 20 mg/l calcein), a dye proposed as efficient marker to tag newly formed calcite, to understand its effect on benthic foraminifera. The experiment was conducted at 25 °C and 27 °C temperatures. The growth of Rosalina sp. is not affected by any of the calcein concentrations within the first 4–5 weeks of exposure. Additionally, no distinct difference in abnormality, mortality and reproduction was observed in the control and treatment specimens during the first 3–4 weeks of incubation. The comparable growth, abnormality, mortality and reproduction in both the control and the various treatments suggest that short-term exposure to calcein does not adversely affect benthic foraminifera. However, during the total 15–16 weeks of experiment, more than 50% of the specimens died in all the treatment sets, as compared to < 40% mortality in control sets, thereby suggesting a slight adverse effect of calcein on benthic foraminifera. Additionally, some of the specimens incubated in calcein spiked media were stunted and developed abnormal shells after 5–6 weeks of incubation. Also the lack of reproduction, the increased mortality and abnormality in specimens subjected to very low calcein concentration (≥ 5 mg/l) for a longer periods of time (5–6 weeks or more), suggest an adverse effect on benthic foraminifera. Although the percentage of abnormal specimens and the percentage of specimens which reproduced were different for the two temperatures (for similar calcein concentrations), no such difference was observed for growth or mortality. The findings support previous studies which proposed that short-term exposure to low calcein concentration can be used as an effective technique to distinguish newly formed chambers in laboratory experiments with foraminifera
 
Date 2015-02-11T04:32:40Z
2015-02-11T04:32:40Z
2015
 
Type Journal Article
 
Identifier Marine Micropaleontology, vol.114; 36-45
no
http://drs.nio.org/drs/handle/2264/4683
 
Language en
 
Relation Mar_Micropaleontol_114_36.jpg
 
Rights An edited version of this paper was published by Elsevier. Copyright [2015] Elsevier
 
Publisher Elsevier