Foraging behaviour of adult female apennine chamois in relation to seasonal variation in food supply

1989 ◽  
Vol 34 ◽  
pp. 513-523 ◽  
Author(s):  
Elisabetta Bruno ◽  
Sandro Lovari
Keyword(s):  
Seasonal Variation ◽  
Adult Female ◽  
Food Supply ◽  
Foraging Behaviour

Influence of intrinsic variation on foraging behaviour of adult female Australian fur seals

2015 ◽  
Vol 526 ◽  
pp. 227-239 ◽  
Author(s):  
AJ Hoskins ◽  
DP Costa ◽  
KE Wheatley ◽  
JR Gibbens ◽  
JPY Arnould
Keyword(s):  
Adult Female ◽  
Foraging Behaviour ◽  
Fur Seals

Seasonal variation in telencephalon cell proliferation in adult female tsinling dwarf skinks ( Scincella tsinlingensis )

2017 ◽  
Vol 1662 ◽  
pp. 7-15 ◽  
Author(s):  
Chun Yang ◽  
Limin Wang ◽  
Xiangyang Xing ◽  
Yanyan Gao ◽  
Li Guo
Keyword(s):  
Cell Proliferation ◽  
Seasonal Variation ◽  
Adult Female

The glossy black-cockatoo (Calyptorhynchus lathami halmaturinus) spends little time and energy foraging on Kangaroo Island, South Australia

2005 ◽  
Vol 53 (3) ◽  
pp. 177 ◽  
Author(s):  
Tamra F. Chapman ◽  
David C. Paton
Keyword(s):  
Food Supply ◽  
Small Proportion ◽  
Foraging Behaviour ◽  
Time Budget ◽  
South Australia ◽  
Breeding Birds ◽  
Additional Energy ◽  
Allocasuarina Verticillata ◽  
Risk Of Predation ◽  
Time And Energy

The endangered Kangaroo Island glossy black-cockatoo (Calyptorhynchus lathami halmaturinus) relies entirely on the seeds of the drooping sheoak (Allocasuarina verticillata) for food. The time budget of the glossy black-cockatoos and their foraging behaviour was recorded to provide an indication of whether their food supply was likely to be limiting. The foraging behaviour of non-breeding and breeding cockatoos was also compared to record the strategy they used to collect the additional energy needed to raise young. Glossy black-cockatoos spent a relatively small proportion of their time foraging, suggesting that the food supply was abundant in the habitats used for feeding. Non-breeding birds spent only 26% of their time feeding and breeding birds spent only 36% of their time feeding. The cockatoos spent 0.4% of their time flying, foraged in a mean of only five trees per day and harvested cones in no more than five bouts per tree. This shows that the cockatoos made few movements between drooping sheoaks and within the canopy of the sheoaks when foraging. When breeding, the cockatoos spent significantly more time per day foraging, cropped cones in significantly more bouts per tree and harvested significantly more cones per tree than non-breeding birds. This shows that breeding birds increased their energy intake without greatly increasing movement between trees. The small number of movements made by glossy black-cockatoos when foraging on Kangaroo Island reflects the abundance of food trees and may be a strategy to reduce the risk of predation.

Effects of reproduction on activity and foraging behaviour of adult female Columbian ground squirrels

1991 ◽  
Vol 69 (8) ◽  
pp. 2209-2216 ◽  
Author(s):  
R. Bruce MacWhirter
Keyword(s):  
Adult Female ◽  
Foraging Behaviour ◽  
Ground Squirrels ◽  
Absolute Amount ◽  
Short Term ◽  
Trade Off ◽  
Active Season ◽  
Spermophilus Columbianus ◽  
Time Of Breeding ◽  
Columbian Ground Squirrels

In this study I evaluated six ways in which adult female Columbian ground squirrels (Spermophilus columbianus) potentially alter their overall activity and foraging behaviour to satisfy the increased energetic needs of reproduction, all of which may involve a trade-off with predation risk. A sample of nonparous females was obtained by administering a short-term chemosterilant at the time of breeding. Relative to nonparous females, parous females spent more time above ground, more time foraging, and less time vigilant, particularly during lactation, and had a longer active season. Thus, in absolute terms, parous females spent more time exposed to aboveground predators than did nonparous females. Parous females spent less time at burrow entrances and, during lactation, were active farther from escape burrows than were nonparous females. Parous and nonparous females did not differ in the percentage of time spent vigilant during foraging bouts. These results indicate that females respond to the energetic demands of reproduction by increasing the absolute amount of time spent foraging, which entails an acceptance of an increase in exposure to predators, and not by modifying their behaviour during foraging bouts.

Seasonal variation in foraging behaviour of plains zebra (Equus quagga) may alter contact with the anthrax bacterium (Bacillus anthracis)

2014 ◽  
Vol 92 (4) ◽  
pp. 331-337 ◽  
Author(s):  
Zepee Havarua ◽  
Wendy C. Turner ◽  
John K.E. Mfune
Keyword(s):  
Seasonal Variation ◽  
Bacillus Anthracis ◽  
Foraging Behaviour ◽  
Dry Season ◽  
Wet Season ◽  
Contact Rates ◽  
Bacterium Bacillus ◽  
Environmental Pathogens ◽  
Host Foraging ◽  
Plains Zebra

Pathogens transmitted via the environment are often aggregated in space, and seasonal variation in wildlife foraging behaviour may alter contact rates with environmental pathogens. The soil-borne bacterium Bacillus anthracis Cohn, 1872 causes anthrax, and herbivores acquire gastrointestinal anthrax by ingesting spores. Therefore host foraging behaviour could be a fundamental component of anthrax epidemiology. This study investigated seasonal changes in bite density and diet of plains zebras (Equus quagga Boddaert, 1785) in relation to anthrax seasonality in Etosha National Park, Namibia, where most zebra anthrax cases are observed in wet seasons. The diet of zebras shifted from more short grasses during the wet season to more tall grasses in the dry season, suggesting a greater potential for soil ingestion in wet seasons. Zebras also foraged most intensively in the wet season with the number of bites/step declining through the dry season. This higher bite density in wet seasons may lead individuals to ingest greater concentrations of the pathogen if foraging in a localized infectious area. Although sex and reproductive state affected bite density, no sex difference in anthrax occurrence was observed. This study demonstrates how considering variation in host foraging behaviour may enhance our understanding of disease seasonality for pathogens with foraging-dependent transmission.

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