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1

Ranging behaviour of juvenile red foxes and its implications for management

100%
Robertson C. P. J., Baker P. J., Harris S.
Acta Theriologica
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2000
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tom 45
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nr 4
The diurnal and nocturnal movement patterns of juvenile foxes Vulpes uulpes (Linneaus, 1758) were investigated in Bristol, UK. Juvenile and adult foxes were radio-tracked between May and December in three consecutive years. In the months preceding the main dispersal period (May-September), cubs showed a gradual increase in the area over which they ranged, and this was reflected both in the use of diurnal lying-up sites and nocturnal patterns of movement. However, their behaviour was highly focused at secure den sites and rendezvous sites. There was no significant difference in the movement patterns of male and female cubs. By the end of August, the nocturnal movement patterns of cubs were comparable with resident aduit animals with the exception of their average speed of travel. During the onset of the main dispersal period (October-December) subadults showed the same movement patterns as adults. These results are discussed within the context of fox management by the distribution of baits. It is proposed that the low bait uptake rate of juveniles is associated with their limited ranging behaviour as cubs, and with differences in patterns of range utilisation as subadults.
2

Ranging behaviour of non-breeding Eurasian Griffon Vultures Gyps fulvus: a GPS-telemetry study

84%
Garcia-Ripolles C., Lopez-Lopez P., Urios V.
Acta Ornithologica
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2011
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tom 46
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nr 2
Little is known about the spatial ecology and ranging behaviour of vultures in Europe. In this paper we used GPS satellite telemetry to assess home-ranges of eight non-breeding Eurasian Griffon Vultures in Spain, trying to answer the main questions on when (i.e. the time of the day), how far (i.e. hourly and daily distances) and where vultures range (i.e. home-range size). Results indicated that vultures ranged extensively mainly in areas where traditional stock-raising practices and pasturing were still common, also including some vulture restaurants, which were visited occasionally. Eurasian Griffon Vultures concentrated their hourly and daily movements in the middle of the day, when the availability of thermal updrafts was higher, favouring foraging activities. The overall foraging range, calculated as Minimum Convex Polygon (MCP) (7419 km2), or as 95% and 50% kernel contours (4078 km2 and 489 km2, respectively), was higher than those reported in previous studies. The precise knowledge of the ranging behaviour and spatial parameters is particularly important for the conservation of scavenger species inhabiting human-dominated areas where human activities may jeopardize vulture populations in the long term.
3

Seasonal home range shift of red deer in a forest-agriculture area in Southern Hungary

84%
Szemethy L., Matrai K., Biro Z., Katona K.
Acta Theriologica
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2003
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tom 48
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nr 4
A long-term radiotelemetry study on red deer Cervus elaphus Linnaeus, 1758 was carried out in a lowland forest-agriculture area in Hungary between 1993-2000. Previous observations suggested seasonal changes in population distribution between forested and agricultural habitat. Red deer concentrated in the forest during winter, but they appeared in the agricultural field during the vegetational period. We investigated the ranging behaviour, testing two alternative hypotheses: home range expansion and home range shift. Weekly radiotelemetry localisations revealed that 9 of 28 hinds showed a clear home range shift from the forest to the agricultural area for a prolonged time during the vegetational period. The remaining portion of the animals used a home range within the forest throughout the entire year. Diet composition analysis using indicator plant species showed that neither daily passages between habitats, nor home range expansion exists. These ranging behaviours were stable hence, if an animal shifted one year it shifted again in consecutive years and vice versa. Our results could be useful for the successful management of red deer populations in such complex habitats and to decrease agricultural damage.
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