Time-Lapse Movies and the Diurnal Time Budget and Activity Patterns of Cataleptodius Floridanus, a Tropical Intertidal Xanthid Crab

1984 ◽  
Vol 4 (2) ◽  
pp. 266-276 ◽  
Author(s):  
Norman A. Engstrom ◽  
Jeanne M. Lucenti
Keyword(s):  
Time Budget ◽  
Activity Patterns ◽  
Time Lapse

scholarly journals Reconstruction scheme for excitatory and inhibitory dynamics with quenched disorder: application to zebrafish imaging

2021 ◽  
Author(s):  
Lorenzo Chicchi ◽  
Gloria Cecchini ◽  
Ihusan Adam ◽  
Giuseppe de Vito ◽  
Roberto Livi ◽  
...  
Keyword(s):  
Structural Information ◽  
Activity Patterns ◽  
Synthetic Data ◽  
Light Sheet ◽  
Time Lapse ◽  
Inhibitory Neurons ◽  
Mean Field Approximation ◽  
Directed Network ◽  
Dynamical Regime ◽  
Power Law Distribution

AbstractAn inverse procedure is developed and tested to recover functional and structural information from global signals of brains activity. The method assumes a leaky-integrate and fire model with excitatory and inhibitory neurons, coupled via a directed network. Neurons are endowed with a heterogenous current value, which sets their associated dynamical regime. By making use of a heterogenous mean-field approximation, the method seeks to reconstructing from global activity patterns the distribution of in-coming degrees, for both excitatory and inhibitory neurons, as well as the distribution of the assigned currents. The proposed inverse scheme is first validated against synthetic data. Then, time-lapse acquisitions of a zebrafish larva recorded with a two-photon light sheet microscope are used as an input to the reconstruction algorithm. A power law distribution of the in-coming connectivity of the excitatory neurons is found. Local degree distributions are also computed by segmenting the whole brain in sub-regions traced from annotated atlas.

scholarly journals Seasonal activity pattern of Swamp deer (Rucervus duvaucelii duvaucelii) in Dudhwa National Park, Uttar Pradesh, India

2014 ◽  
Vol 6 (1) ◽  
pp. 246-253 ◽  
Author(s):  
Kaleem Ahmed ◽  
Jamal A. Khan
Keyword(s):  
Activity Pattern ◽  
National Park ◽  
Time Budget ◽  
Activity Patterns ◽  
Winter Season ◽  
Uttar Pradesh ◽  
Seasonal Activity ◽  
Adult Males ◽  
Continuous Feeding ◽  
Swamp Deer

The data on activity pattern and time budget of Swamp deer (Rucervus duvauceli duvauceli) were collected through instantaneous scan sampling from Dudhwa National Park, Uttar Pradesh, India Diurnal activity pattern of Swamp deer showed marked reduction in resting in winter as compared to summer. In winter resting in adult males showed polymodal pattern with peaks occurring at different hours of the day and continued throughout the day without any break. Feeding of adult females in winter and summer seasons showed a polymodal pattern with peaks occurring at different hours of the day without break. In yearling males feeding and resting was observed to occur throughout the day during winter season with peaks occurring between 11:00 to 12:00 hours. Yearling females showed continuous feeding throughout the day with peaks in different times in both the seasons. The seasonal distribution of activity patterns of the fawns showed that feeding was slightly more in summer as compared to winter. In time budget, of the expenditure on different activities, resting accounted for 63.77% and feeding 24.70%. In both the seasons resting was the major portion of their activity. Analysis showed that in all age and sex categories of Swamp deer in the Dudhwa NP, resting dominated on all other activities. The observation on endangered Swamp deer indicates synchronization in activity only in the feeding in the morning and evening hours and resting throughout the day.

Monitoring respiration and activity in the spider Geolycosa domifex (Hancock) using time-lapse television and CO2 gas analysis

1985 ◽  
Vol 63 (4) ◽  
pp. 843-846 ◽  
Author(s):  
B. M. Culik ◽  
D. J. McQueen
Keyword(s):  
Surface Activity ◽  
Activity Patterns ◽  
Time Lapse ◽  
Gas Analysis ◽  
Wolf Spiders ◽  
Co2 Gas ◽  
Respiration Rates ◽  
Field Activity ◽  
Vertical Activity ◽  
Burrow Activity

The activities of individual burrowing wolf spiders were continuously recorded with time-lapse television and respiration rates were simultaneously recorded. Five categories of activity and rest were differentiated and it was found that resting rates on the surface of the burrow and in the burrow were indistinguishable and similar to measures recorded in other studies. On average, in-burrow activity required 55% more energy than resting, surface activity required 220% more energy, and vertical activity (moving up the burrow) required 1780% more energy than resting. These data were analyzed with respect to the periodicity of activity patterns observed in the field and it was found that respiration rates that relate to periods of field activity are 40% higher than rates recorded for spiders assumed to be at rest.

Activity rhythms of southern brown bandicoots Isoodon obesulus (Marsupialia: Peramelidae) in captivity.

2003 ◽  
Vol 25 (1) ◽  
pp. 81 ◽  
Author(s):  
AN Larcombe
Keyword(s):  
Western Australia ◽  
Activity Patterns ◽  
Time Lapse ◽  
Climatic Conditions ◽  
Late Afternoon ◽  
Activity Rhythms ◽  
Natural Lighting ◽  
Infra Red ◽  
In Captivity ◽  
The Times

The temporal activity patterns of individually housed captive southern brown bandicoots (Isoodon obesulus) were recorded using time-lapse infra-red videorecording. Recordings were made over a period of four continuous days per animal under natural lighting and climatic conditions for Perth, Western Australia during March 2002. Analysis showed that all bandicoots were almost entirely nocturnal and spent ~71% (~17 hr day-1) of their time in their nests. The times of onset of activity were remarkably regular, and occurred both following feeding during the late afternoon and again after dusk (average 1841 hrs). Bandicoots were active for an average of ~7 hr night-1. Virtually all activity involved the bandicoots running around their enclosures (~6.5 hr day-1). This running was interspersed with shorter periods spent feeding (~25 min day-1), grooming (~8 min day-1) and drinking (~2 min day-1). No other behaviours were observed. There was a greater degree of variation in the time of cessation of activity between individuals. Time of cessation ranged from 0039 hrs ± 20 min to 0504 hrs ± 25 min. The average time of cessation of activity was 0315 hrs ± 61 min and was not related to either time of onset of activity or sunrise.

Locomotor Activity Patterns and Feeding Habits in the Prawn Palaemon Serratus (Pennant, 1777) (Decapoda, Palaemonidae) in the Alfacs Bay, Ebro Delta, Spain

Crustaceana ◽  
1996 ◽  
Vol 69 (1) ◽  
pp. 101-112 ◽  
Author(s):  
G. Guerao ◽  
C. Ribera
Keyword(s):  
Feeding Habits ◽  
Activity Patterns ◽  
Video Recording ◽  
Time Lapse ◽  
Maximum Activity ◽  
Ebro Delta ◽  
Diel Activity ◽  
Organic Debris ◽  
Endogenous Rhythmicity ◽  
Composition Changes

AbstractDiel activity rhythms of the prawn Palaemon serratus from Alfacs Bay, Ebro Delta, Spain, were studied under laboratory conditions by time-lapse video recording. The activity pattern showed endogenous rhythmicity of a circadian period with maximum activity at night. The feeding habits of P. serratus were studied using the frequency-of-occurrence method and the points method. The food of this species mainly consists of molluscs and crustaceans, and the remains of gastropods, amphipods, isopods, bivalves, mysids, copepods, and decapods were identified. The remaining items consisted of cnidarians, polychaetes, ophiuroids, plant material, sand, and unidentified organic debris. Results indicate that P. serratus is a predator of benthic invertebrates rather than a scavenger or detritus feeder. Diet composition changes with the size of the prawn.

A Model of Students' Daily Activity Patterns

1973 ◽  
Vol 5 (2) ◽  
pp. 231-266 ◽  
Author(s):  
Janet Tomlinson ◽  
N Bullock ◽  
P Dickens ◽  
P Steadman ◽  
E Taylor
Keyword(s):  
Spatial Distribution ◽  
Daily Activity ◽  
Time Budget ◽  
Activity Patterns ◽  
Social Constraints ◽  
Diary Methods ◽  
Typical Day ◽  
Daily Activity Patterns ◽  
Made In

A model is described whose purpose is to predict the distribution of students in different activities and locations during the course of a typical day, depending on the effective restrictions imposed by the spatial distribution of buildings and sites, and by administrative and social constraints on the timing of activities. The model is of an entropy-maximising type; the data against which it is tested are drawn from time budget surveys made in two universities, using diary methods. A series of exploratory experiments made with the model are reported; these are designed to test the effects of alternative planning and administrative policies on activity patterns and the use of facilities.

scholarly journals Night of the hunter: using cameras to quantify nocturnal activity in desert spiders

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e10684
Author(s):  
Tamara I. Potter ◽  
Aaron C. Greenville ◽  
Christopher R. Dickman
Keyword(s):  
Fire History ◽  
Sand Dunes ◽  
Activity Patterns ◽  
Time Lapse ◽  
Camera Traps ◽  
Diel Activity ◽  
Wolf Spiders ◽  
Research Attention ◽  
Burned Areas ◽  
Night Of The Hunter

Invertebrates dominate the animal world in terms of abundance, diversity and biomass, and play critical roles in maintaining ecosystem function. Despite their obvious importance, disproportionate research attention remains focused on vertebrates, with knowledge and understanding of invertebrate ecology still lacking. Due to their inherent advantages, usage of camera traps in ecology has risen dramatically over the last three decades, especially for research on mammals. However, few studies have used cameras to reliably detect fauna such as invertebrates or used cameras to examine specific aspects of invertebrate ecology. Previous research investigating the interaction between wolf spiders (Lycosidae: Lycosa spp.) and the lesser hairy-footed dunnart (Sminthopsis youngsoni) found that camera traps provide a viable method for examining temporal activity patterns and interactions between these species. Here, we re-examine lycosid activity to determine whether these patterns vary with different environmental conditions, specifically between burned and unburned habitats and the crests and bases of sand dunes, and whether cameras are able to detect other invertebrate fauna. Twenty-four cameras were deployed over a 3-month period in an arid region in central Australia, capturing 2,356 confirmed images of seven invertebrate taxa, including 155 time-lapse images of lycosids. Overall, there was no clear difference in temporal activity with respect to dune position or fire history, but twice as many lycosids were detected in unburned compared to burned areas. Despite some limitations, camera traps appear to have considerable utility as a tool for determining the diel activity patterns and habitat use of larger arthropods such as wolf spiders, and we recommend greater uptake in their usage in future.

Size-dependent heating rates determine the spatial and temporal distribution of small-bodied lizards

2007 ◽  
Vol 28 (3) ◽  
pp. 347-356 ◽  
Author(s):  
János Török ◽  
Gábor Herczeg ◽  
Zoltán Korsós
Keyword(s):  
Body Size ◽  
Heating Rate ◽  
Time Budget ◽  
Activity Patterns ◽  
Temporal Distribution ◽  
Spatial And Temporal Distribution ◽  
Seasonal Activity ◽  
Heating Rates ◽  
Lizard Species ◽  
Joint Effects

AbstractThe rate of heat exchange with the environment is of obvious importance in determining the time budget of behavioural thermoregulation in ectotherms. In small reptiles, heating rate depends mainly on their physical characteristics. We analysed the effect of body size, and the possible joint effects originating from shape and colour differences on heating rate in three small-bodied (0.15-20 g) sympatric lizard species. Heating rate was strongly influenced by body size, while no joint effects with the two other factors were detected. We found that the increase in heating rate with decreasing body size accelerated dramatically below a body weight of 2-3 g. We also analysed associations between body size, seasonal activity patterns and thermal characteristics of the sites where lizards were encountered in the field. Differently sized lizards occurred in thermally different sites and differed in their seasonal activity patterns, both within and among species. Smaller (<2-3 g) lizards occurred in cooler sites and exhibited very low activity during summer. Our results suggest that body size has a considerable influence on the spatial and temporal distribution of extremely small lizards in environments subject to a danger of overheating.

Diurnal activity patterns within female herds of isard around parturition time

1991 ◽  
Vol 69 (3) ◽  
pp. 776-782 ◽  
Author(s):  
Dominique Pépin ◽  
Christophe Abegg ◽  
Cécile Richard
Keyword(s):  
Activity Pattern ◽  
Time Budget ◽  
Activity Patterns ◽  
Gestation Period ◽  
Diurnal Activity ◽  
Physiological Mechanisms ◽  
Rupicapra Pyrenaica ◽  
Adult Females ◽  
Resting Activity ◽  
Crest Line

We compared diurnal activity patterns of isards (Rupicapra pyrenaica) within female herds around the time of parturition in a Pyrenean reserve. From mid-April to mid-May, i.e., at the end of the gestation period, adult females spent significantly more time foraging (76 vs. 65%) and less time resting than yearlings did. From mid-June to mid-July, after the birth of kids, adult females and yearlings had exactly the same time budget (62% for foraging) and the same activity pattern, with a well-marked resting phase at midday. Analysis of data at 15-min intervals indicated synchronism in activity when animals leave the area by crossing the crest line, or when arriving at their foraging or resting phases. During the 2 first months of their life, kids had a polyphasic diurnal activity pattern characterized by four distinct foraging phases 4 h apart, and three peaks in resting activity between midday and evening. Nevertheless, some behavioural and physiological mechanisms permitted kids to synchronize their activity with that of other herd members.

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