scholarly journals Indirect Cannibalism by Crèche-aged American White Pelican (Pelecanus erythrorhynchos) Chicks

2013 ◽  
Vol 127 (1) ◽  
pp. 72
Author(s):  
Alisa J. Bartos ◽  
Marsha A. Sovada ◽  
Lawrence D. Igl ◽  
Pamela J. Pietz
Keyword(s):  
North America ◽  
Population Ecology ◽  
Food Resources ◽  
Severe Weather ◽  
Survival Strategy ◽  
Northern Plains ◽  
Pelecanus Erythrorhynchos ◽  
Species Population ◽  
American White Pelican

At nesting colonies of American White Pelicans (Pelecanus erythrorhynchos), many chicks die from siblicide, severe weather, and disease; this results in carcasses available for scavenging by conspecifics (i.e., indirect cannibalism). Indirect cannibalism has not been reported previously for this species. We describe five cases of crèche-aged American White Pelican chicks consuming or attempting to consume dead younger chicks at two nesting colonies in the northern plains of North America. Cannibalism in the American White Pelican appears to be rare and likely plays no role in the species’ population ecology or dynamics; however, it might be an important survival strategy of individual chicks when food resources are limited.

Population Processes of the Silky Desert Mouse Pseudomys apodemoides (Rodentia), in Mature Heathlands

1981 ◽  
Vol 8 (3) ◽  
pp. 499 ◽  
Author(s):  
A Cockburn
Keyword(s):  
Sex Ratio ◽  
Population Ecology ◽  
Breeding System ◽  
Food Resources ◽  
Rapid Response ◽  
Population Processes ◽  
Western Victoria

The population ecology of P. apodemoides was examined at two mature heathland localities in western Victoria. At the more mesic Little Desert site animals bred in spring and summer, but at the xeric Big Desert site they bred in winter. Such a discrepancy may arise from phenological differences between the two sites, rather than successional or climatic differences. Both populations were characterized by high levels of transience, and one instance of long-term dispersal was recorded. The breeding system may be promiscuous, and large; unstable groups of animals of both sexes may occupy individual burrows. The sex ratio at breeding was female-biased, which generates a capacity for rapid response to fluctuations in food resources. This is valuable in habitats frequently perturbed by fire and drought.

Four new species of feather mites (Acari: Analgoidea)

2002 ◽  
Vol 134 (5) ◽  
pp. 605-618 ◽  
Author(s):  
Sergei V. Mironov ◽  
Terry D. Galloway
Keyword(s):  
New Species ◽  
Hysteronotal Shield ◽  
Feather Mites ◽  
Prodorsal Shield ◽  
Cygnus Columbianus ◽  
Pelecanus Erythrorhynchos ◽  
Porzana Carolina ◽  
American White Pelican ◽  
Tundra Swan

AbstractFour new species of feather mites are described from birds in Canada: Megniniella ratcliffisp.nov. (Analgidae) and Metanalges holderisp.nov. (Analgidae) from the Sora, Porzana carolina (Linnaeus) (Gruiformes: Rallidae): Metingrassia pelecanisp.nov. (Xolalgidae) from the American White Pelican, Pelecanus erythrorhynchos Gmelin (Pelecaniformes: Pelecanidae); and Vingrassia cygnisp.nov. (Xolalgidae) from the Tundra Swan, Cygnus columbianus (Ord) (Ànseriformes: Anatidae). The genus Vingrassia is reinstated from its previous synonymy with the genus Ingrassia based on the presence of an enlarged prodorsal shield in both sexes, by the shape of the idiosoma and the interlobar membrane on the lobar apices in the male, and by the shape of the hysteronotal shield and the absence of setae ps2 in the female.

Influenza A Viruses in American White Pelican (Pelecanus erythrorhynchos)

2010 ◽  
Vol 46 (4) ◽  
pp. 1284-1289 ◽  
Author(s):  
Camille Lebarbenchon ◽  
Srinand Sreevatsan ◽  
Muthannan A. Ramakrishnan ◽  
Rebecca Poulson ◽  
Virginia Goekjian ◽  
...  
Keyword(s):  
Influenza A ◽  
Influenza A Viruses ◽  
Pelecanus Erythrorhynchos ◽  
American White Pelican

SUSPECTED FENBENDAZOLE TOXICITY IN AN AMERICAN WHITE PELICAN (PELECANUS ERYTHRORHYNCHOS)

2016 ◽  
Vol 47 (2) ◽  
pp. 681-685 ◽  
Author(s):  
Dana M. Lindemann ◽  
David Eshar ◽  
Jerome C. Nietfeld ◽  
In Joong Kim
Keyword(s):  
Pelecanus Erythrorhynchos ◽  
American White Pelican

Evidences of Early Man in Alaska

1943 ◽  
Vol 8 (3) ◽  
pp. 254-259 ◽  
Author(s):  
Frank C. Hibben
Keyword(s):  
United States ◽  
North America ◽  
The United States ◽  
Bering Strait ◽  
Northern Plains ◽  
General Acceptance ◽  
Northern Regions

Ever since the general acceptance of the theory that Bering Strait served as the entrance of man into North America, Alaska has been suggested as the most likely area for additional discoveries adding to our knowledge of Early Man. In spite of the fact that the bulk of these discoveries has occurred in the Southwest or in the far west of the United States proper, increasing attention has been paid to northern regions. The Folsom and also the Yuma problem (or problems as the case might be) have been traced into the northern Plains regions of Saskatchewan, Canada.

scholarly journals White Pelican Reproduction in the Molly Islands Breeding Colony, Yellowstone National Park

1984 ◽  
Vol 8 ◽  
pp. 85-88
Author(s):  
Kenneth Diem
Keyword(s):  
National Park ◽  
Breeding Population ◽  
Breeding Colony ◽  
Yellowstone Lake ◽  
The North ◽  
Pelecanus Erythrorhynchos ◽  
Nesting Sites ◽  
A Minor ◽  
American White Pelican ◽  
Continue Monitoring

Compared to other North American White Pelican, Pelecanus erythrorhynchos, breeding colonies, the Molly Islands Colony is a minor colony consisting of 400-600 adults (Lier and Behle, 1966; Diem and Condon, 1967; Sloan, 1973; Diem, 1976). Despite its small size, the colony is unique for these reasons: 1) it is the only White Pelican breeding colony in a national park; 2) the location of the colony at an elevation of 7,733 ft (2,357 m) is the highest recorded for any breeding colony of the species; 3) discovered in 1890, the colony has had variable surveillance since 1917, with relatively intense monitoring since 1965; 4) the breeding population is composed of birds from both coasts of North America; and 5) the colony's nesting sites on the two Molly Islands change frequently with no predictable pattern. In addition, a cumulative sutstrate uplift along the north shore of Yellowstone Lake appears to have significantly raised the stable water level of the southern arms of the lake. Consequently, the major objective of this project is to continue monitoring changes in the reproductive success of the Molly Islands White Pelican colony and to continue studies of the factors influencing those changes.

scholarly journals Introduction to the Population Ecology of North American Caribou

Rangifer ◽  
1996 ◽  
Vol 16 (4) ◽  
pp. 11
Author(s):  
Dale R. Seip ◽  
Kent Brown
Keyword(s):  
North America ◽  
Population Ecology ◽  
North American ◽  
Canis Lupus ◽  
General Model ◽  
Competition For Food ◽  
The Impact

Bergerud has discussed how major differences in caribou density across North America appear to be related to the impact of wolf (Canis lupus) predation, and the strategies used by caribou to avoid wolves. Caribou living in areas without wolves usually occur at high densities and are regulated by competition for food. In this session, we asked the presenters to discuss the population ecology of different caribou herds in North America and to evaluate if they fit the general model.

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