scholarly journals Adaptability of large carnivores to changing anthropogenic food sources: diet change of spotted hyena (Crocuta crocuta) during Christian fasting period in northern Ethiopia

2012 ◽  
Vol 81 (5) ◽  
pp. 1052-1055 ◽  
Author(s):  
Gidey Yirga ◽  
Hans H. De Iongh ◽  
Herwig Leirs ◽  
Kindeya Gebrihiwot ◽  
Jozef Deckers ◽  
...  
2015 ◽  
Vol 18 (3) ◽  
pp. 895-906 ◽  
Author(s):  
Tad C. Theimer ◽  
Anthony C. Clayton ◽  
Alexa Martinez ◽  
Damon L. Peterson ◽  
David L. Bergman

2020 ◽  
Vol 5 (3) ◽  
pp. p16
Author(s):  
Marina Silva-Opps ◽  
Whitney Kelly-Clark ◽  
Sheldon Opps

It has been postulated that red foxes (Vulpesvulpes) inhabiting Prince Edward Island National Park (Canada) make very little use of natural food sources and that anthropogenic food play an integral part in their diet. The use of anthropogenic food sources has also been associated with an increased number of fatal fox vehicle-collisions in the park. The main goal of this study was to examine the composition of the diet of foxes inhabiting Prince Edward Island National Park and to compare this diet with foxes found in other areas of the island. In particular, we examined the importance of anthropogenic food items in foxes inhabiting the national park. We analyzed 38 stomachs from foxes killed by trappers or vehiclesduring late fall and early winter within and outside the national park. Our results showed that rodents and vegetation were the most common food items present in fox stomachs whether the animals were obtained from within or outside the park. Values of coefficient of variation of food items found in fox stomachs indicated a great diversity in diet composition. However, only six stomachs contained anthropogenic food items. Stomachs of foxes killed by vehicles contained twice the amount of anthropogenic food items than those that were collected from trappers. Overall, our findings indicate that anthropogenic food items are only a minor component in the diet of foxes occurring within the park, at least during the period of time examined in this study. Future studies should examine diet composition during other seasons when the quantity and quality of anthropogenic food sources is different. 


2013 ◽  
Vol 78 (3) ◽  
pp. 193-197 ◽  
Author(s):  
Gidey Yirga ◽  
Wondimu Ersino ◽  
Hans H. De Iongh ◽  
Herwig Leirs ◽  
Kindeya Gebrehiwot ◽  
...  

The Condor ◽  
2001 ◽  
Vol 103 (2) ◽  
pp. 399-404 ◽  
Author(s):  
Marco Restani ◽  
John M. Marzluff ◽  
Richard E. Yates

Abstract We investigated survivorship, movements, and sociality of Common Ravens (Corvus corax) exploiting concentrated food resources at a landfill in Greenland. From 1992–1995 we banded 383 ravens: 365 were captured at the landfill and 18 were banded in nearby nests. Thirty-nine ravens were recovered, most by shooting (87%). Mean number of days survived post-banding (494 ± 97) did not differ among age groups, but a higher proportion of juveniles was recovered. Ravens migrated west and south to the coast during winter. No difference existed among age groups in mean distance between locations of banding and recovery (151 ± 31 km). Number of ravens congregating at the landfill declined during the study, coinciding with a decrease in the local human population. Harsh winter climate, limited ice-free land, and abundant human refuse influenced raven use of the wilderness landscape by facilitating the formation of large, nomadic foraging groups.


Animals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1272
Author(s):  
Atle Mysterud ◽  
Isa Nergård Skjelbostad ◽  
Inger Maren Rivrud ◽  
Øystein Brekkum ◽  
Erling L. Meisingset

Herbivores like cervids usually graze on widely scattered forage, but anthropogenic food sources may cause spatial revisitation and aggregation, posing a risk for transmission of infectious diseases. In 2016, chronic wasting disease (CWD) was first detected in Norway. A legal regulation to ban supplemental feeding of cervids and to fence stored hay bales was implemented to lower aggregation of cervids. Knowledge of further patterns and causes of spatial revisitation can inform disease management. We used a recently developed revisitation analysis on GPS-positions from 13 red deer (Cervus elaphus) to identify the pattern of spatial clustering, and we visited 185 spatial clusters during winter to identify the causes of clustering. Anthropogenic food sources were found in 11.9% of spatial clusters, which represented 31.0% of the clusters in agricultural fields. Dumping of silage and hay bales were the main anthropogenic food sources (apart from agricultural fields), and unfenced hay bales were available despite the regulation. The probability of the clusters being in agricultural fields was high during winter. It may be necessary to find other ways of disposing of silage and enforcing the requirement of fencing around hay bales to ensure compliance, in particular during winters with deep snow.


2019 ◽  
Vol 100 (6) ◽  
pp. 1941-1953 ◽  
Author(s):  
David S Green ◽  
Kay E Holekamp

Abstract Populations of large carnivores are declining in many parts of the world due to anthropogenic activity. Some species of large carnivores, however, are able to coexist with people by altering their behavior. Altered behaviors may be challenging to identify in large carnivores because these animals are typically cryptic, nocturnal, live at low densities, and because changes in their behavior may be subtle or emerge slowly over many years. We studied the effects of livestock presence on the movements of one large carnivore, the spotted hyena (Crocuta crocuta). We fit 22 adult female spotted hyenas with GPS collars to quantify their movements in areas with and without livestock or herders present, in and around a protected area in southwestern Kenya. We investigated anthropogenic, social, and ecological effects on the speed of movement, distances traveled, long-distance movements, and extraterritorial excursions by spotted hyenas. Hyenas living primarily within the protected area, but in the presence of livestock and herders, moved faster, traveled over longer distances, and were more likely to be within their territories than did conspecifics living in areas without livestock and herders. Hyenas of low social rank were more likely than hyenas of high social rank to engage in long-distance travel events, and these were more likely to occur when prey were scarce. The movement patterns of this large African carnivore indicate a flexibility that may allow them to persist in landscapes that are becoming increasingly defined by people.


2010 ◽  
Vol 57 (4) ◽  
pp. 759-765 ◽  
Author(s):  
Gidey Yirga Abay ◽  
Hans Bauer ◽  
Kindeya Gebrihiwot ◽  
Jozef Deckers

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