Calcium stress in Daphnia pulicaria and exposure to predator-derived cues: Making a bad situation worse?

2021 ◽  
Author(s):  
Marcus Rice ◽  
Catriona Jones ◽  
Cody Starke ◽  
Paul Frost
Keyword(s):  
Daphnia Pulicaria ◽  
Calcium Stress

Regulation of bone repletion in rats subjected to varying low-calcium stress

1984 ◽  
Vol 246 (2) ◽  
pp. R190-R196 ◽  
Author(s):  
R. H. Drivdahl ◽  
C. C. Liu ◽  
D. J. Baylink
Keyword(s):  
Bone Formation ◽  
Formation Rate ◽  
Bone Volume ◽  
Strong Positive Correlation ◽  
Sprague Dawley ◽  
Bone Formation Rate ◽  
Osteoblast Activity ◽  
Calcium Stress ◽  
Sprague Dawley Rats ◽  
Very High

Weanling Sprague-Dawley rats subjected to varying degrees of low-Ca dietary stress (depletion) showed graded increases in the rate of endosteal bone formation when normal dietary Ca was restored (repletion). There was a strong positive correlation between the rate of bone resorption in depletion and the rate of bone formation attained after 1 wk of repletion. However, bone formation declined rapidly within the first 4 wk of repletion, despite the persistence of a substantial endosteal bone volume deficit. Furthermore the medullary area (indicative of bone volume) did not by itself determine the bone formation rate. Bone volume in test groups was restored to control levels after 6 mo of repletion, and this result could be predicted by a kinetic analysis. Thus, although very high rates of formation in early repletion decline rapidly, smaller increments relative to controls must be sustained for long periods. Our data indicate that increased formation rats at all stages of repletion are a consequence of elevations in both osteoblast number and osteoblast activity.

Genetic, Acclimatization, and Ontogenetic Effects on Habitat Selection Behavior in Daphnia pulicaria

Evolution ◽  
1994 ◽  
Vol 48 (4) ◽  
pp. 1324 ◽  
Author(s):  
Mathew A. Leibold ◽  
Alan J. Tessier ◽  
Colin T. West
Keyword(s):  
Habitat Selection ◽  
Daphnia Pulicaria ◽  
Selection Behavior ◽  
Ontogenetic Effects

Variation in toxicity of a current-use insecticide among resurrected Daphnia pulicaria genotypes

Ecotoxicology ◽  
2014 ◽  
Vol 24 (3) ◽  
pp. 488-496 ◽  
Author(s):  
Adam M. Simpson ◽  
Punidan D. Jeyasingh ◽  
Jason B. Belden
Keyword(s):  
Daphnia Pulicaria ◽  
A Current
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