Imaging through water turbulence with a plenoptic sensor

2016 ◽  
Author(s):  
Chensheng Wu ◽  
Jonathan Ko ◽  
Christopher C. Davis
Keyword(s):  
Water Turbulence

Studies on motility in vitro of an ectoparasitic monogenean, Diclidophora merlangi

Parasitology ◽  
1989 ◽  
Vol 98 (1) ◽  
pp. 85-93 ◽  
Author(s):  
A. G. Maule ◽  
D. W. Halton ◽  
J. M. Allen ◽  
I. Fairweather
Keyword(s):  
Sea Water ◽  
Water Movement ◽  
Muscle Tone ◽  
Maximal Activity ◽  
Progressive Reduction ◽  
Spontaneous Movements ◽  
Excitatory Responses ◽  
Response To Water ◽  
Water Turbulence

SummaryAn isometric transducer system has been used to record spontaneous motor activity in Diclidophora merlangi in vitro. Motility took the form of either continuous irregular contractions or bursts of activity with intermittent quiescent periods. Maximal activity was recorded from specimens at 5–8 °C in artificial sea water (ASW). Decerebration induced a period of enhanced motility which subsided within 1 h. Water turbulence elicited large, rapid contractions of the longitudinal body musculature which did not habituate or fatigue. Induced water turbulence at frequencies higher than 3/min inhibited spontaneous movements, resulting in a progressive reduction in contraction amplitude and, eventually (30/min), the abolition of any response to water movement. The neurotoxin tetrodotoxin failed to modify worm activity. Excitatory responses from both intact worms and strip preparations were obtained with 5-hydroxytryptamine, dopamine and noradrenaline, but aminergic antagonists failed to block their effects. Atropine stimulated contractility, whereas the effects of acetylcholine or carbachol were inconsistent. Nicotine increased muscle tone but the effect was unaltered by atropine, mecamylamine or d–tubocurarine. Muscarine, hemicholinium, neostigmine and eserine were without apparent effect.

Spontaneous formation of equatorial jets in freely decaying shallow water turbulence

1999 ◽  
Vol 11 (5) ◽  
pp. 1272-1274 ◽  
Author(s):  
R. Iacono ◽  
M. V. Struglia ◽  
C. Ronchi
Keyword(s):  
Shallow Water ◽  
Spontaneous Formation ◽  
Water Turbulence

scholarly journals Bridge under troubled water: Turbulence and niche partitioning in fish foraging

2016 ◽  
Vol 6 (24) ◽  
pp. 8919-8930 ◽  
Author(s):  
Zeynep Pekcan-Hekim ◽  
Noora Hellén ◽  
Laura Härkönen ◽  
Per Anders Nilsson ◽  
Leena Nurminen ◽  
...  
Keyword(s):  
Niche Partitioning ◽  
Water Turbulence
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