Ingestion of trace metals by the opossum shrimp, Mysis relicta, determined by laser ablation sampling - inductively coupled plasma mass spectrometry

1998 ◽  
Vol 76 (8) ◽  
pp. 1605-1610 ◽  
Author(s):  
David C Lasenby ◽  
Geoff Veinott
Keyword(s):  
Mass Spectrometry ◽  
Laser Ablation ◽  
Trace Metals ◽  
Inductively Coupled Plasma ◽  
The Other ◽  
Gut Contents ◽  
Mysis Relicta ◽  
Inductively Coupled ◽  
Opossum Shrimp ◽  
Plasma Mass Spectrometry

Differences in the diet of individual mysids can be determined by analysing the elemental composition of the gut contents of individual mysids with laser ablation sampling - inductively coupled plasma mass spectrometry. Two groups of the opossum shrimp, Mysis relicta, were cultured in the laboratory for a 2-week period. One group was fed a diet of Daphnia magna and the other lake sediment. Although the element:Sr ratios within the gut were highly variable, mean element:Sr ratios of several elements (V, Pb, Ca) in the gut of mysids fed D. magna were significantly different from those in the gut of sediment-fed mysids.

scholarly journals A culture-based calibration of benthic foraminiferal paleotemperature proxies: δ<sup>18</sup>O and Mg/Ca results

2010 ◽  
Vol 7 (4) ◽  
pp. 1335-1347 ◽  
Author(s):  
H. L. Filipsson ◽  
J. M. Bernhard ◽  
S. A. Lincoln ◽  
D. C. McCorkle
Keyword(s):  
Mass Spectrometry ◽  
Laser Ablation ◽  
Temperature Dependence ◽  
Benthic Foraminifera ◽  
Inductively Coupled Plasma ◽  
The Other ◽  
Inductively Coupled ◽  
Plasma Mass Spectrometry ◽  
Predicted Values ◽  
Increasing Temperature

Abstract. Benthic foraminifera were cultured for five months at four temperatures (4, 7, 14 and 21 °C) to establish the temperature dependence of foraminiferal calcite δ18O and Mg/Ca. Two Bulimina species (B. aculeata and B. marginata) were most successful in terms of calcification, adding chambers at all four temperatures and reproducing at 7 and 14 °C. Foraminiferal δ18O values displayed ontogenetic variations, with lower values in younger individuals. The δ18O values of adult specimens decreased with increasing temperature in all but the 4 °C treatment, exhibiting a relationship consistent with previous δ18O paleotemperature calibration studies. Foraminiferal Mg/Ca values, determined by laser ablation inductively coupled plasma mass spectrometry, were broadly consistent with previous Mg/Ca calibration studies, but extremely high values in the 4 °C treatment and higher than predicted values at two of the other three temperatures make it challenging to interpret these results.

Changes in the elemental composition of the stomach contents of the opossum shrimp Mysis relicta during diel vertical migration

2004 ◽  
Vol 82 (3) ◽  
pp. 525-528 ◽  
Author(s):  
David Lasenby ◽  
Youqing Shi
Keyword(s):  
Water Column ◽  
Elemental Composition ◽  
Inductively Coupled Plasma ◽  
Stomach Contents ◽  
Gut Contents ◽  
Mysis Relicta ◽  
Inductively Coupled ◽  
Opossum Shrimp ◽  
Lake Bottom ◽  
Plasma Mass Spectrometry

Clear differences in the elemental composition of the stomachs of adult Mysis relicta Lovén captured on or near the lake bottom during the day and those captured at night in the water column were observed using laser ablation – inductively coupled plasma – mass spectrometry. The elemental composition of the stomachs of mysids captured at night indicated that they were feeding on zooplankton and algae, whereas the stomachs of those captured during the day indicated sediment feeding. These results suggest that lake sediments may be a significant part of the mysid diet and that sediments transported vertically as gut contents may contribute to the transport of elements into the water column.

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