Daytime and nighttime activity at a breeding colony of Great Blue Herons in a nontidal environment

1993 ◽  
Vol 71 (6) ◽  
pp. 1075-1078 ◽  
Author(s):  
Raymond McNeil ◽  
Rejean Benoît ◽  
Jean-Luc Desgranges
Keyword(s):  
Tidal Cycle ◽  
Activity Patterns ◽  
Coastal Areas ◽  
Daily Rhythm ◽  
Diurnal Activity ◽  
Nocturnal Activity ◽  
Breeding Colony ◽  
Ardea Herodias ◽  
Foraging Time

It is generally admitted that in coastal areas, herons of the genus Ardea adjust their foraging time according to the tidal cycle. However, to what extent do tides control the herons' daily rhythm of activity? To answer this question, we present the day and night activity patterns of Great Blue Herons (Ardea herodias) arriving to feed their young at a heronry located in a nontidal environment in southern Quebec. Herons were about half as active at night as during the day. Therefore, although significantly less than diurnal activity, nocturnal activity was not negligible, and consequently the tide cycle is not the only factor controlling the daily rhythm of the herons' activity. Those breeding pairs that were most active during the day were no more or less active at night. Diurnal activity was more closely correlated with the number of young that fledged than was nocturnal activity. Thus, night activity was not necessarily important for the survival of young herons, but it could be explained by other factors such as the greater availability of certain prey at night.

Is camera trap videography suitable for assessing activity patterns in eastern grey kangaroos?

2018 ◽  
Vol 24 (2) ◽  
pp. 134 ◽  
Author(s):  
Jai M. Green-Barber ◽  
Julie M. Old
Keyword(s):  
Activity Patterns ◽  
Camera Trap ◽  
Camera Traps ◽  
Diurnal Activity ◽  
Nocturnal Activity ◽  
Behavioural Patterns ◽  
Species Being ◽  
Fighting Behaviour

Camera traps are frequently used in wildlife research and may be a useful tool for monitoring behavioural patterns. The suitability of camera traps to monitor behaviour depends on the size, locomotion, and behaviour of the species being investigated. The suitability of cameras for documenting the behaviour of eastern grey kangaroos was assessed here by comparing activity patterns collected using cameras to published activity patterns for the species. The activity patterns calculated from camera trap data were largely consistent with data from previous studies, although nocturnal activity appeared to be under-represented. Observations of unusual fighting behaviour illustrates the potential for camera traps to enable capture of novel observations. Kangaroo behaviour appeared to be influenced by the presence of cameras; however, no kangaroos retreated from cameras. Data suggested that kangaroos became habituated to cameras after eight months. The findings of this study suggest that camera traps are suitable for assessing the diurnal activity of eastern grey kangaroos and are useful tools for documenting their behaviour.

scholarly journals As clear as day: nocturnal activity differs from diurnal activity in a temporally constrained capital breeder

Behaviour ◽  
2019 ◽  
Vol 156 (10) ◽  
pp. 997-1016 ◽  
Author(s):  
Zoe L. Fraser ◽  
Ross M. Culloch ◽  
Sean D. Twiss
Keyword(s):  
Activity Patterns ◽  
Video Camera ◽  
Energy Budgets ◽  
Implicit Assumption ◽  
Diurnal Activity ◽  
Nocturnal Activity ◽  
Activity Budgets ◽  
Time Activity ◽  
Direct Observations ◽  
In The Wild

Abstract Time-activity budgets are fundamental to behavioural studies, allowing examination of how individuals allocate their time, and potentially energy, and how these patterns vary spatially and temporally and in relation to habitat, individual identity, sex, social status and levels of anthropogenic disturbance. Direct observations of animal behaviour, especially in the wild, are often limited to daylight hours; therefore, many activity budgets relate to diurnal activity only, or assumptions are made about nocturnal activity. Activity budgets have been a key component of many behavioural and energetics studies of breeding grey seals (Halichoerus grypus, Fabricius, 1791), and yet very little is known about nocturnal activity of grey seals, and a general, implicit assumption of no significant change from day to night seems to pervade the literature. Here we use a combination of high resolution digital video and thermal imaging video camera to follow known individual grey seal mothers from day into night to examine activity patterns during lactation. We show distinct differences in nocturnal activity budgets relative to diurnal activity budgets. Mothers spent significantly more time resting with a reduction of time spent in the alert and comfort move behavioural categories during nocturnal periods. It is clear that diurnal time-activity patterns of breeding female grey seals cannot be extrapolated to represent activity across a 24-hour cycle. These considerations are particularly critical in studies that aim to use time-activity budgets as proxies for energy budgets.

scholarly journals Activity Patterns of River Otters in the Oxbow Bend Vicinity, Grand Teton National Park

1995 ◽  
Vol 19 ◽  
pp. 31-32
Author(s):  
Joseph Hall
Keyword(s):  
Special Interest ◽  
National Park ◽  
Activity Patterns ◽  
Diurnal Activity ◽  
Nocturnal Activity ◽  
Grand Teton National Park ◽  
River Otters ◽  
Lutra Canadensis

Goals of the project were to obtain information on daily movements and activity patterns of River otters (Lutra canadensis), particularly nocturnal activity, to supplement data on diurnal activity obtained from a previous study. Of special interest was to determine whether or not nocturnalism activity occur which are similar to those seen by day. Additionally, observations of any evidence of fidelity to specific habitat sites documented in previous years were to be recorded,

The active nightlife of diurnal birds: extraterritorial forays and nocturnal activity patterns

2014 ◽  
Vol 88 ◽  
pp. 175-184 ◽  
Author(s):  
Michael P. Ward ◽  
Mark Alessi ◽  
Thomas J. Benson ◽  
Scott J. Chiavacci
Keyword(s):  
Activity Patterns ◽  
Nocturnal Activity

Diurnal activity patterns of coypu in an urban habitat

2005 ◽  
Vol 50 (2) ◽  
pp. 207-211 ◽  
Author(s):  
Jork Meyer ◽  
Nicole Klemann ◽  
Stefan Halle
Keyword(s):  
Activity Patterns ◽  
Urban Habitat ◽  
Diurnal Activity

Occupancy, detectability, and density of crab-eating fox (Cerdocyon thous) in two protected areas of restinga habitats in Brazil

2019 ◽  
Vol 97 (10) ◽  
pp. 952-959
Author(s):  
Priscila Stéfani Monteiro-Alves ◽  
Débora Molino Helmer ◽  
Atilla Colombo Ferreguetti ◽  
Juliane Pereira-Ribeiro ◽  
Carlos Frederico Duarte Rocha ◽  
...  
Keyword(s):  
Protected Areas ◽  
Activity Patterns ◽  
Camera Traps ◽  
Total Abundance ◽  
Nocturnal Activity ◽  
Starting Point ◽  
Cerdocyon Thous ◽  
Future Work ◽  
Mammal Communities ◽  
Management And Conservation

Crab-eating foxes (Cerdocyon thous (Linnaeus, 1766)) are frequently recorded in lists of mammal communities. However, studies quantifying aspects of the ecology of the species are uncommon in the literature. Thus, we aimed to quantify the density, activity, habitat use, and potential threats of C. thous in two protected areas (PAs) in the State of Espírito Santo, Brazil. We used data derived from camera traps and sand plots to model occupancy, detectability, activity; we also used random encounter models (REMs) to model density and abundance. We also estimated the activity of the species. Density of C. thous was 0.82 individuals/km2 with a total abundance of 119 individuals. We concluded that in the PAs studied, C. thous had bimodal, twilight–nocturnal activity patterns and was associated with water sources. Although the species in the area has a relatively high density compared with that from other areas in Brazil, it could be locally threatened by the highway that crosses the two PAs, promoting roadkill events, and by domestic dogs (Canis familiaris Linnaeus, 1758) recorded in these areas. Results presented herein can be a starting point to support future work in the region and to make predictions regarding the management and conservation of C. thous, a widely distributed species.

Moonlight Avoidance Behavior in Leach's Storm-Petrels as a Defense against Slaty-Backed Gulls

The Auk ◽  
1986 ◽  
Vol 103 (1) ◽  
pp. 14-22 ◽  
Author(s):  
Yutaka Watanuki
Keyword(s):  
Predator Avoidance ◽  
Full Moon ◽  
Activity Patterns ◽  
Predation Rate ◽  
Activity Levels ◽  
Nocturnal Activity ◽  
Oceanodroma Leucorhoa ◽  
Risk Of Predation ◽  
Reduced Activity ◽  
Moonlight Avoidance

Abstract Diurnal activity patterns of Leach's Storm-Petrels (Oceanodroma leucorhoa) and Slaty-backed Gulls (Larus schistisagus) were investigated. The petrels reduced activity in moonlight in May and June when the predation rate by gulls was relatively high. Petrel activity levels were inversely correlated with light intensities and the corresponding risk of predation by the gull. This suggests that nocturnal activity and moonlight avoidance by the petrel in its colony are an effective defense against diurnal predators. Activity synchronization of the petrel was most marked during the full moon, further supporting the predator-avoidance hypothesis.

Nocturnal Activity Patterns of Feral Ponies

1980 ◽  
Vol 61 (1) ◽  
pp. 116-118 ◽  
Author(s):  
R. R. Keiper ◽  
M. A. Keenan
Keyword(s):  
Activity Patterns ◽  
Nocturnal Activity
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