Changes in abundance, productivity, and distribution of western American White Pelicans (Pelecanus erythrorhynchos), 1981–2014

2018 ◽  
pp. 258-268
Author(s):  
Colleen E. Moulton ◽  
Shane B. Roberts ◽  
Jon S. Horne ◽  
Martha Wackenhut
Keyword(s):  
Pelecanus Erythrorhynchos

scholarly journals American White Pelicans and Recreational Boaters on Lakes of the North American Great Plains: Habitat Use Overlap

2014 ◽  
Vol 7 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Carolyn A. Gaudet ◽  
Christopher M. Somers
Keyword(s):  
Habitat Use ◽  
Great Plains ◽  
The Other ◽  
Northern Great Plains ◽  
Economic Prosperity ◽  
Shoreline Development ◽  
Point Count ◽  
The North ◽  
Pelecanus Erythrorhynchos ◽  
Near Shore

Shoreline development and boating on lakes of the northern Great Plains of North America have increased due to recent economic prosperity. Few studies have examined the general characteristics of habitats used by foraging waterbirds and boats to determine levels of overlap. To address this issue, we conducted point count surveys of American White Pelicans (Pelecanus erythrorhynchos) and boats on two important recreational lakes in southern Saskatchewan, Canada. The majority of pelicans and boats detected used near-shore areas of the lakes, identifying the importance of shallow water habitats and providing evidence of significant overlap. The location of pelicans relative to the shore did not change in the presence of boats, and there was no significant relationship between boat numbers and pelican numbers. These analyses suggest that pelicans did not make major changes to their habitat use on the lakes as a result of boating activity. When pelicans and boats were present simultaneously at point count locations, pelicans appeared to avoid boats on one lake, but showed no detectable avoidance behavior on the other lake. The importance of interactions between recreational boating and foraging pelicans is currently unclear. Set-back distances to protect foraging pelicans from boating activity do not appear necessary based on our analyses.

Greater predation by Double-crested Cormorants on cutthroat versus rainbow trout fingerlings stocked in a Wyoming river

1999 ◽  
Vol 77 (12) ◽  
pp. 1984-1990 ◽  
Author(s):  
James R Lovvorn ◽  
Daniel Yule ◽  
Clayton E Derby
Keyword(s):  
Rainbow Trout ◽  
Cutthroat Trout ◽  
Phalacrocorax Auritus ◽  
Limited Data ◽  
Platte River ◽  
The North ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Oncorhynchus Clarki Bouvieri ◽  
Pelecanus Erythrorhynchos ◽  
Yellowstone Cutthroat Trout

We studied the relative vulnerability of Yellowstone cutthroat trout (Oncorhynchus clarki bouvieri) versus rainbow trout (Oncorhynchus mykiss) stocked as fingerlings in the North Platte River, Wyoming, to Double-crested Cormorant (Phalacrocorax auritus) predation. Cutthroat fingerlings decreased as a fraction of the population from stocking in late June to electrofishing surveys in the following October and March. In contrast, the fraction of cutthroat fingerlings among tagged fingerlings eaten by cormorants collected on the river was significantly greater than that in the population when originally stocked. More limited data from pellets regurgitated by adult cormorants at a nearby colony and in American White Pelicans (Pelecanus erythrorhynchos) collected on the river showed the same trend toward greater percentages of cutthroat trout being consumed than were present among trout stocked. There were no differences in cormorant predation rates on the Eagle Lake strain of rainbow trout reared under shaded versus partially shaded conditions, or between Auburn and Bar BC strains of Snake River (Yellowstone) cutthroat trout. On the North Platte River, cutthroat trout fingerlings were more susceptible to cormorant predation than rainbow trout of similar size that were stocked simultaneously.

A Field Study of Temperature Regulation in Young White Pelicans, Pelecanus Erythrorhynchos

Ecology ◽  
1953 ◽  
Vol 34 (3) ◽  
pp. 554-560 ◽  
Author(s):  
George A. Bartholomew ◽  
William R. Dawson ◽  
Edward J. O'Neill
Keyword(s):  
Field Study ◽  
Temperature Regulation ◽  
Pelecanus Erythrorhynchos

scholarly journals White Pelican (Pelecanus erythrorhynchos) in Georgia

The Auk ◽  
1930 ◽  
Vol 47 (3) ◽  
pp. 415-416
Author(s):  
Earle R. Greene
Keyword(s):  
Pelecanus Erythrorhynchos

scholarly journals Winter and Summer Home Ranges of American White Pelicans (Pelecanus erythrorhynchos) Captured at Loafing Sites in the Southeastern United States

Waterbirds ◽  
2016 ◽  
Vol 39 (3) ◽  
pp. 287-294 ◽  
Author(s):  
D. Tommy King ◽  
Justin Fischer ◽  
Bronson Strickland ◽  
W. David Walter ◽  
Fred L. Cunningham ◽  
...  
Keyword(s):  
United States ◽  
Southeastern United States ◽  
Home Ranges ◽  
Pelecanus Erythrorhynchos

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.

Distribution and size of colonies of white pelicans, Pelecanus erythrorhynchos, in Canada

1970 ◽  
Vol 48 (5) ◽  
pp. 1029-1032 ◽  
Author(s):  
Kees Vermeer
Keyword(s):  
Rocky Mountains ◽  
Food Supply ◽  
Breeding Population ◽  
Canadian Shield ◽  
Southern Boundary ◽  
Breeding Range ◽  
Eastern Boundary ◽  
Pelecanus Erythrorhynchos ◽  
Mammalian Predators ◽  
Nesting Sites

On the basis of a count of 14 103 nests, the total breeding population of white pelicans in Canada was estimated to consist of 30 000 birds for the years 1967–1969, seven times higher than previous estimates. The boundaries of the Canadian breeding range of pelicans were found to coincide closely with the 0 °C isotherm in April, the southern boundary of the Canadian Shield, and the eastern boundary of the Rocky Mountains. As those factors appeared to be closely related to the availability of fish, it is concluded that the extent of the breeding range of the pelicans in Canada is mainly determined by the food supply. Besides availability of fish, pelicans appeared to require nesting sites inaccessible to mammalian predators.

Sign in / Sign up

Export Citation Format

Share Document