scholarly journals INFLUENCE OF METALS ON SURVIVAL AND LIFE ACTIVITY OF STARFISHES ASTERIAS RUBENS

2018 ◽  
pp. 29-34
Author(s):  
V. A. Fedyunin ◽  
A. A. Poromov ◽  
A. V. Smurov
Keyword(s):  
Surface Waters ◽  
Behavioral Responses ◽  
Asterias Rubens ◽  
Life Activity ◽  
Lead And Cadmium ◽  
Wide Range ◽  
L 96 ◽  
Russian Norms ◽  
Time Evaluation ◽  
Copper Lead

The effect of metals chlorides (cobalt, manganese, iron, lead, cadmium and copper) at wide range of concentrations on various aspects of the life of starfishes Asterias rubens has been studied. The experiments included a survival and behavioral responses (righting time) evaluation of starfishes during the seven-day exposure. Copper is the most toxic of the studied metals (half-lethal concentration LC50 = 0,062±0,01 mg/L, 96 hours of exposure), then toxicity decrease in the following order: lead (LC50 = 1,99±0,08 mg/L), cadmium (LC50 = 1,6±0,1 mg/L), cobalt (LC50 = 57,7±2,1 mg/L), manganese (LC50= 79,7±4,3 mg/L). Iron at studied concentrations did not influence the starfish’s survival. Copper, lead and cadmium led to a significant increase of the righting time after 96 hours of exposure. The toxic effects of these metals, except for copper, were revealed at higher concentration then Russian norms for surface waters.

scholarly journals Effects of Copper, Lead, and Cadmium on the Sorption and Desorption of Atrazine onto and from Carbon Nanotubes

2008 ◽  
Vol 42 (22) ◽  
pp. 8297-8302 ◽  
Author(s):  
Guang-Cai Chen ◽  
Xiao-Quan Shan ◽  
Yu-Sheng Wang ◽  
Zhi-Guo Pei ◽  
Xiu-E Shen ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Lead And Cadmium ◽  
Copper Lead

SERS Surfaces Modified with a 4-(2-Pyridylazo)resorcinol Disulfide Derivative: Detection of Copper, Lead, and Cadmium

1995 ◽  
Vol 67 (2) ◽  
pp. 360-364 ◽  
Author(s):  
L. Gayle. Crane ◽  
DaoXin. Wang ◽  
L. Malia. Sears ◽  
Bernard. Heyns ◽  
Keith. Carron
Keyword(s):  
Lead And Cadmium ◽  
Copper Lead

Automated electrochemical stripping of copper, lead, and cadmium in seawater

1984 ◽  
Vol 56 (13) ◽  
pp. 2387-2392 ◽  
Author(s):  
David R. Turner ◽  
S. G. Robinson ◽  
Michael. Whitfield
Keyword(s):  
Lead And Cadmium ◽  
Copper Lead ◽  
Electrochemical Stripping

scholarly journals Sea-surface CO<sub>2</sub> fugacity in the subpolar North Atlantic

2008 ◽  
Vol 5 (2) ◽  
pp. 535-547 ◽  
Author(s):  
A. Olsen ◽  
K. R. Brown ◽  
M. Chierici ◽  
T. Johannessen ◽  
C. Neill
Keyword(s):  
North Atlantic ◽  
Surface Waters ◽  
Mixed Layer Depth ◽  
Sea Surface ◽  
First Year ◽  
Layer Depth ◽  
High Resolution Data ◽  
Chl A ◽  
Wide Range ◽  
Summer Warming

Abstract. We present the first year-long subpolar trans-Atlantic set of surface seawater CO2 fugacity (fCO2sw) data. The data were obtained aboard the MV Nuka Arctica in 2005 and provide a quasi-continuous picture of the fCO2sw variability between Denmark and Greenland. Complementary real-time high-resolution data of surface chlorophyll-a (chl-a) concentrations and mixed layer depth (MLD) estimates have been collocated with the fCO2sw data. Off-shelf fCO2sw data exhibit a pronounced seasonal cycle. In winter, surface waters are saturated to slightly supersaturated over a wide range of temperatures. Through spring and summer, fCO2sw decreases by approximately 60 μatm, due to biological carbon consumption, which is not fully counteracted by the fCO2sw increase due to summer warming. The changes are synchronous with changes in chl-a concentrations and MLD, both of which are exponentially correlated with fCO2sw in off-shelf regions.

scholarly journals Testing the habituation assumption underlying models of parasitoid foraging behavior

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3097 ◽  
Author(s):  
Paul K. Abram ◽  
Antonino Cusumano ◽  
Katrina Abram ◽  
Stefano Colazza ◽  
Ezio Peri
Keyword(s):  
Foraging Behavior ◽  
Time Allocation ◽  
Behavioral Response ◽  
Behavioral Responses ◽  
Protein Synthesis Inhibitor ◽  
Partial Recovery ◽  
Behavioral Strategies ◽  
Atpase Inhibitor ◽  
Wide Range ◽  
Training Interval

BackgroundHabituation, a form of non-associative learning, has several well-defined characteristics that apply to a wide range of physiological and behavioral responses in many organisms. In classic patch time allocation models, habituation is considered to be a major mechanistic component of parasitoid behavioral strategies. However, parasitoid behavioral responses to host cues have not previously been tested for the known, specific characteristics of habituation.MethodsIn the laboratory, we tested whether the foraging behavior of the egg parasitoidTrissolcus basalisshows specific characteristics of habituation in response to consecutive encounters with patches of host (Nezara viridula) chemical contact cues (footprints), in particular: (i) a training interval-dependent decline in response intensity, and (ii) a training interval-dependent recovery of the response.ResultsAs would be expected of a habituated response, wasps trained at higher frequencies decreased their behavioral response to host footprints more quickly and to a greater degree than those trained at low frequencies, and subsequently showed a more rapid, although partial, recovery of their behavioral response to host footprints. This putative habituation learning could not be blocked by cold anesthesia, ingestion of an ATPase inhibitor, or ingestion of a protein synthesis inhibitor.DiscussionOur study provides support for the assumption that diminishing responses of parasitoids to chemical indicators of host presence constitutes habituation as opposed to sensory fatigue, and provides a preliminary basis for exploring the underlying mechanisms.

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