scholarly journals Shared space, individually used: spatial behaviour of non-breeding ravens (Corvus corax) close to a permanent anthropogenic food source

2015 ◽  
Vol 157 (2) ◽  
pp. 439-450 ◽  
Author(s):  
Matthias-Claudio Loretto ◽  
Sabrina Reimann ◽  
Richard Schuster ◽  
Dana Marie Graulich ◽  
Thomas Bugnyar
Keyword(s):  
Food Source ◽  
Spatial Behaviour ◽  
Corvus Corax ◽  
Shared Space ◽  
Anthropogenic Food

scholarly journals Effects of Anthropogenic Food Sources on Movements, Survivorship, and Sociality of Common Ravens in the Arctic

The Condor ◽  
2001 ◽  
Vol 103 (2) ◽  
pp. 399-404 ◽  
Author(s):  
Marco Restani ◽  
John M. Marzluff ◽  
Richard E. Yates
Keyword(s):  
Human Population ◽  
Age Groups ◽  
Food Resources ◽  
Food Sources ◽  
The Arctic ◽  
Corvus Corax ◽  
Winter Climate ◽  
Anthropogenic Food Sources ◽  
Anthropogenic Food

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.

scholarly journals Poor health is associated with use of anthropogenic resources in an urban carnivore

2015 ◽  
Vol 282 (1806) ◽  
pp. 20150009 ◽  
Author(s):  
Maureen Murray ◽  
Mark A. Edwards ◽  
Bill Abercrombie ◽  
Colleen Cassady St. Clair
Keyword(s):  
Food Source ◽  
Isotope Analysis ◽  
Sarcoptes Scabiei ◽  
Home Ranges ◽  
Gps Collars ◽  
Time Space ◽  
The World ◽  
Anthropogenic Resources ◽  
Anthropogenic Food ◽  
Do So

Rates of encounters between humans and wildlife are increasing in cities around the world, especially when wildlife overlap with people in time, space and resources. Coyotes ( Canis latrans ) can make use of anthropogenic resources and reported rates of conflict have increased in cities across North America. This increase may be linked to individual differences in the use of human food and developed areas. We compared the relationships between coyote age, sex or health and the use of anthropogenic resources, which we defined as using developed areas over large home ranges, being active during the day, and consuming anthropogenic food. To do so, we applied GPS collars to 19 coyotes and sampled hair for stable isotope analysis. Eleven coyotes appeared to be healthy and eight were visibly infested with sarcoptic mange ( Sarcoptes scabiei ), a mite that causes hair loss. Diseased coyotes used more developed areas, had larger monthly home ranges, were more active during the day, and assimilated less protein than coyotes that appeared to be healthy. We speculate that anthropogenic food provides a low-quality but easily accessible food source for diseased coyotes, which in turn may increase reliance on it and other anthropogenic resources to promote encounters with people.

SEM Observations on the Germination of Euonymous Americanus

1985 ◽  
Vol 43 ◽  
pp. 508-509
Author(s):  
D.R. Hill ◽  
J.R. McCurry ◽  
L.P. Elliott ◽  
G. Howard
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Light Microscopy ◽  
Filter Paper ◽  
Room Temperature ◽  
Food Source ◽  
Environmental Chamber ◽  
Dormant Stage ◽  
Scanning Electron

Germination of Euonymous americanus in the laboratory has previously been unsuccessful. Ability to germinate Euonymous americanus. commonly known as the american strawberry bush, is important in that it represents a valuable food source for the white-tailed deer. Utilizing the knowledge that its seeds spend a period of time in the rumin fluid of deer during their dormant stage, we were successful in initiating germination. After a three month drying period, the seeds were placed in 25 ml of buffered rumin fluid, pH 8 at 40°C for 48 hrs anaerobically. They were then allowed to dry at room temperature for 24 hrs, placed on moistened filter paper and enclosed within an environmental chamber. Approximately four weeks later germination was detected and verified by scanning electron microscopy; light microscopy provided inadequate resolution. An important point to note in this procedure is that scarification, which was thought to be vital for germination, proved to be unnecessary for successful germination to occur. It is believed that germination was propagated by the secretion of enzymes or prescence of acids produced by microorganisms found in the rumin fluid since sterilized rumin failed to bring about germination.

Ravens (Corvus corax) learn from video demonstrations

2011 ◽  
Author(s):  
Elizabeth Price ◽  
Andrew Whiten ◽  
Thomas Bugnyar
Keyword(s):  
Corvus Corax

Carlisle Museum's Natural History Record Bureau, 1902–1912: Britain's first local environmental records centre

2020 ◽  
Vol 47 (1) ◽  
pp. 1-15
Author(s):  
Robin M. Sellers ◽  
Stephen Hewitt
Keyword(s):  
Natural History ◽  
Nature Reserve ◽  
Falco Peregrinus ◽  
Corvus Corax ◽  
Buteo Buteo ◽  
Local Newspaper ◽  
History Record ◽  
Economic Ornithology ◽  
The Impact

Carlisle Museum's Natural History Record Bureau, Britain's first local environmental records centre, collected and collated records, mainly of birds but including also mammals and fishes, from amateur naturalists. It initially covered an area of 80 kilometres around Carlisle, and later from Cumberland, Westmorland and the detached portion of Lancashire north of Morecambe Bay: in effect the modern-day county of Cumbria. At the end of each year, those records which had been accepted were logged in a special “Record Book”, and a summary published. For the first eight years of its ten-year existence (1902–1912), these were printed in the local newspaper, The Carlisle Journal, but from 1908 they also appeared in The Zoologist. Alongside the Record Bureau, the Museum undertook a number of other activities, including a short-lived attempt to establish a bird-ringing project, an investigation into the impact of black-headed gulls ( Chroicocephalus ridibundus) on farming and fisheries interests (an early example of economic ornithology), the setting up of Kingmoor Nature Reserve and the protection of nesting peregrines ( Falco peregrinus), buzzards ( Buteo buteo) and ravens ( Corvus corax). The effectiveness of the Natural History Record Bureau and the reasons for its demise are briefly discussed.

Utilization Of White-Meat, Red-Meat And Super Red Dragon Fruit (Hylocereus sp) Skin Waste As An Alternative Food Source

2018 ◽  
Vol 1 (01) ◽  
pp. 18-21
Author(s):  
Yulian Syahputri ◽  
Diana Widiastuti
Keyword(s):  
Dietary Fiber ◽  
Food Source ◽  
Red Meat ◽  
Raw Material ◽  
Alternative Food ◽  
Sodium Metabisulfite ◽  
White Meat ◽  
Fruit Skin ◽  
Dragon Fruit ◽  
Alternative Food Source

Dragon fruit skin, waste material (dragon fruit waste), will have a profitable sale value if it can be used as a food raw material. Dragon fruit skin waste contains relatively high dietary fiber so it can be used as a food raw material. This study aims to utilize dragon fruit skin waste for the manufacture of dragon fruit skin flour as an alternative food source. Some tests are made on white-meat dragon fruit skin, red-meat dragon fruit skin and super red dragon fruit skin. The preliminary study is the soaking of the three types of dragon fruit skin in two solutions, namely 0.1% sodium citrate and 0.1% sodium metabisulfite to prevent the browning effect on flour. Dragon fruit skin flour from the soaking with both solutions is then characterized physically, including its texture, color, flavor and rendement. The best physical characterization is followed by chemical characterization, including the contents of water, ash, protein, fat, carbohydrate, dietary fiber, minerals (Fe, Na, K, Ca and P), and also microbiological characterization of Escherichia coli, molds and Bacillus cereus. The chemical and microbiological characterization shows that the red-meat dragon fruit skin flour has better results than the white-meat and super red dragon fruit skin flour does. The red-meat dragon fruit skin flour contains 8.80% water, 0.20% ash, 2.35% fat, 7.69%, protein, 68,29% carbohydrate and 28,72% dietary fiber as well as 4.40 mg K, 8.76 mg Na , 0.65 mg Fe , 10.20 mg Ca and 32.58 mg P. Keywords: Waste, Dragon Fruit Skin, Dragon Fruit Skin Powder, Alternative Food Source

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