Absence of a tidal component in the diel pattern of locomotory activity of sea catfish,Arius felis

1985 ◽  
Vol 12 (1) ◽  
pp. 69-73 ◽  
Author(s):  
Craig W. Steele
Keyword(s):  
Locomotory Activity ◽  
Diel Pattern ◽  
Tidal Component

The emergence of cercariae of Trichobilharzia ocellata and its relationship to the activity of its snail host Lymnaea stagnalis

1976 ◽  
Vol 54 (9) ◽  
pp. 1481-1487 ◽  
Author(s):  
P. A. Anderson ◽  
J. W. Nowosielski ◽  
N. A. Croll
Keyword(s):  
Activity Pattern ◽  
Lymnaea Stagnalis ◽  
Close Association ◽  
Snail Host ◽  
Diel Activity ◽  
Locomotory Activity ◽  
Diel Pattern ◽  
Dark Light ◽  
Diel Activity Pattern ◽  
Trichobilharzia Ocellata

The emergence pattern of cercariae of Trichobilharzia ocellata from Lymnaea stagnalis was examined at 2-h intervals from infected snails acclimatized to 12 h light – 12 h dark periods. A marked diel pattern of emergence was found during the periods of illumination; this was reversed when the light–dark regime was reversed.A method for the continuous recording of the locomotory activity of L. stagnalis is described. Snails acclimatized to either normal or reversed dark–light regimes showed a consistent diel pattern of activity during illumination. Peak activity occurred in the first few hours of illumination.It is proposed that the diel activity pattern results from an internal rhythm in which the snail becomes entrained to the lighting regime. The close association between the diel activity pattern of the snail and the emergence of T. ocellata indicates that host movement stimulates cercarial emergence. Light is thought to influence the cercariae directly and indirectly through the snail.

Energy constraint exerted by the parasite Schistosoma mansoni on the locomotion of its snail host, Biomphalaria glabrata

1996 ◽  
Vol 74 (4) ◽  
pp. 594-598 ◽  
Author(s):  
Claudia Gérard
Keyword(s):  
Resource Allocation ◽  
Schistosoma Mansoni ◽  
Biomphalaria Glabrata ◽  
Snail Host ◽  
Locomotory Activity ◽  
Patent Period ◽  
Energy Constraint

The consequences of the constraint caused by the parasite Schistosoma mansoni on the locomotory activity of its snail host, Biomphalaria glabrata, were studied during the patent period. Rates of locomotion were determined 6 times per 24-h period for juvenile and adult snails with single-miracidium infections, then compared with those of healthy snails of the same age. The locomotory activity of infected snails was the same during the day and at night, whereas control snails moved less at night than during the day. The locomotion of snails infected when immature was similar to that of the controls during the day and superior at night. The locomotion of snails infected when mature decreased regularly during patency and clearly decreased in comparison with that of healthy snails. The results are interpreted in terms of energy constraint on the mode of resource allocation of the host due to the parasite.

Activity response to oxygen in the brook trout, Salvelinus fontinalis (Mitchill)

1970 ◽  
Vol 48 (5) ◽  
pp. 1067-1072 ◽  
Author(s):  
J. W. T. Dandy
Keyword(s):  
Brook Trout ◽  
Bridge Circuit ◽  
Flow System ◽  
Wheatstone Bridge ◽  
Threshold Concentration ◽  
Response Threshold ◽  
Locomotory Activity ◽  
Absolute Concentration ◽  
Activity Response ◽  
Voltage Output

Locomotory activity of brook trout was measured at 10 °C in water of three different oxygen concentrations. Activity was sensed with a thermistor probe in a Wheatstone bridge circuit. Voltage output of the bridge was integrated automatically and recorded.Exposure to 6.0 and 1.7 p.p.m. oxygen induced tin activity response within minutes which reached a peak during the first hour then slowly waned. The intensity of response was greater to lower than to higher oxygen levels. Not all fish responded to 8.0 p.p.m. The response threshold concentration was estimated to be 8.3 p.p.m. oxygen. The response appeared to be made to the absolute concentration rather than to the rate of oxygen decrease.Various difficulties in estimating thresholds for dissolved substances in a constant flow system are considered. It is suggested that the response threshold found here be applied only in the specific circumstances of this experiment.

Effects of Corticosterone on Locomotory Activity in Red-Legged Salamanders

Herpetologica ◽  
2013 ◽  
Vol 69 (2) ◽  
pp. 118-126 ◽  
Author(s):  
Corina L. Wack ◽  
Mary K. Ratay ◽  
Sarah K. Woodley
Keyword(s):  
Locomotory Activity

The Daily Rhythm of Activity of the Cockroach, Blatta Orientalis L

1940 ◽  
Vol 17 (3) ◽  
pp. 267-277 ◽  
Author(s):  
D. L. GUNN
Keyword(s):  
Activity Rhythm ◽  
Continuous Light ◽  
Locomotory Activity ◽  
Continuous Darkness ◽  
Daily Cycle ◽  
Blatta Orientalis ◽  
Physical Stimuli ◽  
Inactive Phase ◽  
Set Up ◽  
Main Activity

1. In an aktograph at 25.5°C., at upwards of 75% relative humidity and with food present, the average locomotory activity of the cockroach per day does not depend on whether there is continuous light for weeks, or continuous darkness, or a daily alternation of light and darkness. 2. When temperature and humidity do not vary during the day and other factors are kept as constant as possible, the cockroach's activity can be largely concentrated into any desired half of the day, simply by suitably adjusting the time of onset of the half-day's darkness. A rhythm can thus be set up, so that the main activity occurs at the same hours each day. 3. This activity rhythm persists for some days in continuous light or continuous darkness, but eventually activity becomes much more evenly spread over the whole day, leaving only a slight residual rhythm which is unrelated to the previous conspicuous one. A new conspicuous rhythm can then be started at once by alternation of light and darkness. 4. There are indications that animal responses to physical stimuli may depend to a considerable extent on whether the animal is in the active or the inactive phase of its daily cycle. A method is suggested for making it possible to study the nocturnal phase during the daytime.

scholarly journals Lights out, let’s move about: locomotory activity patterns of Wagner’s gerbil from the desert of Saudi Arabia

2012 ◽  
Vol 47 (2) ◽  
pp. 195-202
Author(s):  
A.N. Alagaili ◽  
O.B. Mohammed ◽  
N.C. Bennett ◽  
M.K. Oosthuizen
Keyword(s):  
Saudi Arabia ◽  
Activity Patterns ◽  
Locomotory Activity ◽  
Let's Move
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