Description and evaluation of a photoelectric system for monitoring the locomotor activity of a pelagic fish

1978 ◽  
Vol 56 (6) ◽  
pp. 1412-1419 ◽  
Author(s):  
Jean-Guy J. Godin ◽  
Cornelis Groot ◽  
M. Connor Armstrong
Keyword(s):  
Locomotor Activity ◽  
Monitoring System ◽  
Pink Salmon ◽  
Pelagic Fish ◽  
Infrared Light ◽  
Circular Channel ◽  
Water Currents ◽  
Individual Fish ◽  
Photoelectric System ◽  
Light Beams

A photoelectric system, designed to monitor continuously the 'spontaneous' locomotor activity of individual, juvenile pink salmon in the laboratory, is described and evaluated quantitatively. Data on the swimming behaviour of individual fish in the circular channel indicate that the design permitted salmon to swim freely in circuits without physical obstructions impeding or water currents directing their movements. Swimming speeds of individual fish were not influenced by infrared light beams emitted across the activity channel. The photoelectric monitoring system was found to be reliable, equally sensitive in detecting the locomotor movements of small (4.3–5.8 cm) and of large (13.0–19.0 cm) fish, and provided data which closely approximated (on average to within 94.0–102.6%) the total momentary locomotor activity of individual pink salmon.

The Behaviour of Migrating Pink and Chum Salmon Fry

1956 ◽  
Vol 13 (3) ◽  
pp. 309-325 ◽  
Author(s):  
William S. Hoar
Keyword(s):  
Light Intensity ◽  
Chum Salmon ◽  
Pink Salmon ◽  
Bright Light ◽  
Circular Channel ◽  
Water Currents ◽  
Salmon Fry ◽  
First Time

Pink salmon fry which have never schooled are negatively phototactic, prefer a cover of stones and do not emerge into bright light. Those which have schooled show a strong cover reaction when exposed to a rapid increase in light intensity but do not seek cover unless the change is abrupt. In general they remain in bright light after they have schooled. This change in behaviour occurs rapidly (15 minutes or less) when the fry school for the first time. Chum salmon fry establish a definite direction of swimming in the quiet water of a circular channel or basin. The established direction is stable and not permanently disturbed by light or darkness, by water currents, by strong avoiding reactions, by changing the location or by excluding direct skylight. The direction may be initially established in relation to water currents.

Locomotor Activity Monitoring System in Rodents

2020 ◽  
Author(s):  
Demetrio Fabian Garcia Nocetti ◽  
Pliar Duran Hernandez ◽  
Martin Fuentes Cruz ◽  
Martin Fuentes Cano ◽  
Adalberto Joel Duran Ortega
Keyword(s):  
Locomotor Activity ◽  
Monitoring System ◽  
Activity Monitoring

Apparatus for the Quantitative Determination of Locomotor Activity Patterns of Aquatic Organisms Using Infrared Light-Emitting Diodes

1975 ◽  
Vol 32 (10) ◽  
pp. 1884-1885 ◽  
Author(s):  
Claude R. Cripe ◽  
Jesse H. Cripe ◽  
Robert J. Livingston
Keyword(s):  
Locomotor Activity ◽  
Quantitative Determination ◽  
Light Emitting Diodes ◽  
Activity Patterns ◽  
Aquatic Organisms ◽  
Infrared Light ◽  
Light Sources ◽  
Activity Data ◽  
Light Emitting

Photoelectric methods of measuring the activity of aquatic organisms allow unrestrained movement of the animal being studied but may disrupt exogenously controlled rhythms if the light is visible. An apparatus is described that uses infrared light-emitting diodes that eliminate some of the problems associated with incandescent light sources. A graph of the locomotor activity data of two pigfish (Orthopristis chrysoptera) which was produced by this apparatus is included.

810nm near-infrared light offers neuroprotection and improves locomotor activity in MPTP-treated mice

2015 ◽  
Vol 92 ◽  
pp. 86-90 ◽  
Author(s):  
Florian Reinhart ◽  
Nabil El Massri ◽  
Fannie Darlot ◽  
Napoleon Torres ◽  
Daniel M. Johnstone ◽  
...  
Keyword(s):  
Locomotor Activity ◽  
Near Infrared ◽  
Infrared Light ◽  
Near Infrared Light

Evaluation of a wireless activity monitoring system to quantify locomotor activity in horses in experimental settings

2016 ◽  
Vol 49 (2) ◽  
pp. 225-231 ◽  
Author(s):  
M. Fries ◽  
S. Montavon ◽  
C. Spadavecchia ◽  
O. L. Levionnois
Keyword(s):  
Locomotor Activity ◽  
Monitoring System ◽  
Activity Monitoring

Long-term passive acoustic monitoring revealed seasonal and diel patterns of cetacean presence in the Istanbul Strait

2013 ◽  
Vol 94 (6) ◽  
pp. 1195-1202 ◽  
Author(s):  
Ayhan Dede ◽  
Ayaka Amaha Öztürk ◽  
Tomonari Akamatsu ◽  
Arda M. Tonay ◽  
Bayram Öztürk
Keyword(s):  
Monitoring System ◽  
Black Sea ◽  
Aegean Sea ◽  
Acoustic Monitoring ◽  
Pelagic Fish ◽  
The Black Sea ◽  
Common Dolphin ◽  
Passive Acoustic Monitoring ◽  
Cetacean Species ◽  
Passive Acoustic

The Istanbul Strait (Bosphorus) is a part of the Turkish Straits System, connecting the Aegean Sea and the Black Sea. There are three cetacean species in the Strait, namely the harbour porpoise (Phocoena phocoena), the common dolphin (Delphinus delphis), and the bottlenose dolphin (Tursiops truncatus). To monitor the presence of the cetaceans, a fixed stereo passive acoustic monitoring system (A-tag) was deployed in the middle of the Strait from July 2009 to September 2010. In total 26,814 click trains were detected. Presence, direction and inter-click intervals of phonating cetaceans were measured. Most click trains were detected during the night time. Diel presence pattern was prominent in March and April. In spring, the cetaceans were concentrated in one specific direction from the fixed monitoring system. In contrast, they were found in all directions for the rest of the year. Short range sonar (inter-click intervals (ICIs) less than 50 ms) was commonly detected in spring. During the rest of the year ICIs could reach up to 150 ms. All these findings suggest that they were feeding or socializing in spring and mostly travelling in the other seasons. It is well known that pelagic fish such as sprat and bluefish start their migration from the Aegean Sea to the Black Sea in spring. This study suggests that the cetaceans use the middle part of the Strait for feeding on the pelagic fish in spring when the fish migration has just started.

Realtime Driving Fatigue Monitoring System with Optical Function Materials Based on Controllable Infrared Light

2012 ◽  
Vol 485 ◽  
pp. 56-59
Author(s):  
Liang Xiu Zhang ◽  
Yong Cao ◽  
Feng Ping Cao ◽  
Rong Chun Guo
Keyword(s):  
Kalman Filter ◽  
Monitoring System ◽  
Template Matching ◽  
The State ◽  
Infrared Light ◽  
Gaussian Smoothing ◽  
Matching Algorithm ◽  
Smoothing Filter ◽  
Fatigue Monitoring ◽  
Driving Fatigue

A feasible driver fatigue monitoring system based on controllable infrared light is presented. This system adopts controllable infrared light to get the light and dark image of the pupil, and preprocess the image using differences, gaussian smoothing filter and binaryzation. Then the location of driver’s eyes is detected by template matching algorithm. Finally, Kalman Filter is implemented to track the eyes in order to detect the state of the eyes. This mechanism features accuracy, responsiveness and adaptability to various situations.

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