scholarly journals Does availability of resources influence grazing strategies in female Svalbard reindeer?

Rangifer ◽  
2003 ◽  
Vol 23 (1) ◽  
pp. 25 ◽  
Author(s):  
Snorre Henriksen ◽  
Ronny Aanes ◽  
Bernt-Erik Sæther ◽  
Thor Harald Ringsby ◽  
Jarle Tufto
Keyword(s):  
Home Range ◽  
Foraging Behaviour ◽  
Small Sample Size ◽  
Home Range Size ◽  
Small Sample ◽  
Range Size ◽  
Foraging Strategies ◽  
Wild Female ◽  
Svalbard Reindeer ◽  
Grazing Strategies

Foraging strategies and range use in wild female Svalbard reindeer (Rangifer tarandus platyrhynchus) were studied in two areas where the historical grazing pressure differed. We mapped vegetation where the reindeer were seen grazing, and related forage availability to characteristics such as home range size, activity budgets and reproductive status. There were significant differences in quantity of forage available between the two areas and the utilization of vegetation types differed between the sites. However, we found no difference in home range size between the two sites, and individual home range sizes were not related to forage quantity, possibly a result of a skewed and small sample size. Even though significant differences in availability of plant species and groups were found, no variation in home range size was found between reproductive and non-reproductive females on Brøggerhalvøya. Neither did we find any differences between areas or between reproductive groups within or between areas in how female reindeer allocated use of time, or in number of steps taken. However, a significant three way interaction indicated that some variance existed between reproductive groups within or between areas, but we do not conclude that this indicate different grazing strategies. Thus, even though variation in the duration of previous grazing has evidently resulted in rather different foraging conditions in our two areas, we detected no differences in present-day foraging behaviour. Thus, our analyses suggest no relationship or feedback between past grazing and current foraging behaviour in these reindeer.

Differences in the foraging behaviour of male and female Egyptian fruit bats (Rousettus aegyptiacus)

2011 ◽  
Vol 89 (6) ◽  
pp. 466-473 ◽  
Author(s):  
R.M.R. Barclay ◽  
D.S. Jacobs
Keyword(s):  
Home Range ◽  
Foraging Behaviour ◽  
Home Range Size ◽  
Small Population ◽  
Range Size ◽  
Native Forest ◽  
Fruit Bats ◽  
Male And Female ◽  
Pregnancy And Lactation ◽  
Males And Females

Male and female animals frequently have different foraging behaviours owing to differences in body size or nutritional demand, or to intraspecific competition. We studied foraging by Egyptian fruit bats ( Rousettus aegyptiacus (E. Geoffroy, 1810)) in Cape Town, South Africa, to test predictions based on differences in nutritional demand during reproduction. Using radiotelemetry, we compared emergence, return, and foraging times of males and females during pregnancy and lactation. We also determined home-range size, habitat use, and use of figs (genus Ficus L.), which are a potential source of calcium for lactating females. During the pregnancy period, males left their roost later than females and were away from the roost for shorter periods. There were no differences in timing of foraging during lactation. Females foraged in native forest more than males did, but home-range size did not differ. There was no evidence that females fed on figs more than males did. Differences in foraging behaviour were not as predicted based on nutritional and energetic differences. The small population may have meant that there was little competition for food, and figs may have provided a profitable source of energy for both males and females. Differences in the timing of foraging are best explained by the need for males to defend roosting sites.

Foraging Habitat, Home-Range Size and Diet of a Mediterranean Bat Species, Savi's Pipistrelle

2019 ◽  
Vol 20 (2) ◽  
pp. 351
Author(s):  
Marina Kipson ◽  
Martin Šálek ◽  
Radek Lučan ◽  
Marcel Uhrin ◽  
Edita Maxinová ◽  
...  
Keyword(s):  
Home Range ◽  
Home Range Size ◽  
Range Size ◽  
Foraging Habitat

scholarly journals Green morays (Gymnothorax funebris) have sedentary ways in mangrove bays, but also ontogenetic forays to reef enclaves

2021 ◽  
Author(s):  
Matthew S. Kendall ◽  
Laughlin Siceloff ◽  
Ashley Ruffo ◽  
Arliss Winship ◽  
Mark E. Monaco
Keyword(s):  
Home Range ◽  
Site Fidelity ◽  
Home Range Size ◽  
Range Size ◽  
Caribbean Region ◽  
History Of ◽  
High Site ◽  
Single Night ◽  
Exploratory Movements ◽  
Moray Eel

AbstractSurprisingly, little is known about basic life history of the largest moray eel species in the Caribbean region, the green moray eel (Gymnothorax funebris). Sixteen eels were captured from the mangrove fringe in multiple bays on St. Croix, USVI, implanted with coded acoustic transmitters, and their movements were tracked for up to 11 months using an array of 37 stationary acoustic receivers. They exhibited high site fidelity in the bays during their residence, using the same general parts of individual bays and did not switch bays except for one individual. There was no relationship between eel size (mean TL = 83 cm, range = 54–126 cm) and home range size (mean area of 95% KUD = 5.8 ha ± 0.7 SE). Most individuals were more frequently detected at night than during the day suggesting greater nocturnal activity. Several of the larger eels (mean TL = 93 cm ± 5.9 SE) showed clear and permanent emigration tracks out of the mangrove estuary to coral reef habitats offshore. For some individuals, these habitat shifts were preceded by exploratory movements away from the eel’s typical home range the night before emigration. All final emigration events took place nocturnally, happened during a single night, and occurred during months from December to May. Mean emigration speed was 3.4 km/h. This study is the first documentation of an ontogenetic habitat shift in moray eels, as well as the first determination of home range size for this species and their site fidelity in mangrove habitats.

Resource availability drives variation in a marsupial glider’s home‐range size

2021 ◽  
Author(s):  
A. M. Stobo‐Wilson ◽  
T. Cremona ◽  
B. P. Murphy ◽  
S. M. Carthew
Keyword(s):  
Home Range ◽  
Resource Availability ◽  
Home Range Size ◽  
Range Size

Personality and behavioral syndromes in two Peromyscus species: presence, lack of state dependence, and lack of association with home range size

2021 ◽  
Vol 75 (1) ◽  
Author(s):  
Victoria Underhill ◽  
Gregory G. Pandelis ◽  
Jeremy Papuga ◽  
Anne C. Sabol ◽  
Austin Rife ◽  
...  
Keyword(s):  
Home Range ◽  
State Dependence ◽  
Home Range Size ◽  
Range Size ◽  
Behavioral Syndromes

scholarly journals Free-Ranging Farm Cats: Home Range Size and Predation on a Livestock Unit In Northwest Georgia

PLoS ONE ◽  
2015 ◽  
Vol 10 (4) ◽  
pp. e0120513 ◽  
Author(s):  
Susanna E. Kitts-Morgan ◽  
Kyle C. Caires ◽  
Lisa A. Bohannon ◽  
Elizabeth I. Parsons ◽  
Katharine A. Hilburn
Keyword(s):  
Home Range ◽  
Home Range Size ◽  
Range Size ◽  
Free Ranging

scholarly journals Swift Foxes and Ideal Free Distribution: Relative Influence of Vegetation and Rodent Prey Base on Swift Fox Survival, Density, and Home Range Size

ISRN Zoology ◽  
2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Craig M. Thompson ◽  
Eric M. Gese
Keyword(s):  
Home Range ◽  
Landscape Heterogeneity ◽  
Ideal Free Distribution ◽  
Survival Rates ◽  
Home Range Size ◽  
Range Size ◽  
Distribution Model ◽  
Free Distribution ◽  
Swift Fox ◽  
Ideal Free

Swift foxes (Vulpes velox) are an endemic mesocarnivore of North America subject to resource and predation-based pressures. While swift fox demographics have been documented, there is little information on the importance of top-down versus bottom-up pressures or the effect of landscape heterogeneity. Using a consumable resource-based ideal free distribution model as a conceptual framework, we isolated the effects of resource-based habitat selection on fox population ecology. We hypothesized if swift fox ecology is predominantly resource dependant, distribution, survival, and space use would match predictions made under ideal free distribution theory. We monitored survival and home range use of 47 swift foxes in southeastern Colorado from 2001 to 2004. Annual home range size was 15.4 km2, and seasonal home range size was 10.1 km2. At the individual level, annual home range size was unrelated to survival. Estimates of fox density ranged from 0.03 to 0.18 foxes/km2. Seasonal survival rates were 0.73 and 1.0 and did not differ seasonally. Foxes conformed to the predictions of the ideal free distribution model during winter, indicating foxes are food stressed and their behavior governed by resource acquisition. During the rest of the year, behavior was not resource driven and was governed by security from intraguild predation.

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