Responses of California Brown Pelicans to Disturbances at a Large Oregon Roost

Wright, Sadie K.; Roby, Daniel D.; Anthony, Robert G.

doi:10.1675/1524-4695(2007)030[0479:rocbpt]2.0.co;2

Cited by 5 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, Krapu et al (1984) found that Sandhill Cranes (Antigone canadensis) on the Platte River, Nebraska, USA, selected roost sites where the river channel was ≥ 150 m wide, presumably because the water barrier provided safety from predators. The effect of human disturbance on roosting California Brown Pelicans (Pelecanus occidentalis californicus) was also documented; disturbance led to a 21% decrease in roost site use (Wright et al 2007).…”

Section: Discussionmentioning

confidence: 99%

Space Use and Movements of Adult Reddish Egrets (Egretta rufescens) During Winter

Koczur

Kent²,

Ballard

et al. 2018

Waterbirds

View full text Add to dashboard Cite

show abstract

Section: Discussionmentioning

confidence: 99%

Space Use and Movements of Adult Reddish Egrets (Egretta rufescens) During Winter

Koczur

Kent²,

Ballard

et al. 2018

Waterbirds

View full text Add to dashboard Cite

show abstract

“…The theory that pelicans are more likely to be entangled when pelicans leave a perch close to a pier is further supported by the two other significant variables: time of day and the Covid-19 closure. Pelicans forage significantly more during the morning and if entanglement is associated with pelicans foraging, then it makes sense that this variable is significant [ 20 , 21 , 27 ]. Our surveys found more entangled pelicans both during the morning and mid-day surveys than late afternoon.…”

Section: Discussionmentioning

confidence: 99%

The Role of Fishing Piers in Brown Pelican (Pelecanus occidentalis) Entanglement

Thomas

Forys

2022

Animals

View full text Add to dashboard Cite

Throughout their range, Brown Pelicans (Pelecanus occidentalis) are one of the most common species to become entangled in fishing gear. We surveyed four piers every other week for one year (6/2019–5/2020) in the Tampa Bay region, FL, USA, to determine frequency of pelican entanglement associated with fishing piers, and explored factors that might influence the rate of entanglement. We conducted a generalized linear model (GLM) to determine the influence that pier, pier closure due to COVID-19, time of day and season, number of anglers, and presence of human behaviors that might attract pelicans to the pier had on the number of entangled pelicans. We conducted 144 surveys and counted 3766 pelicans of which 254 (7%) were entangled. The variables significantly associated (p < 0.05) with entanglement were the pier, time of day, and pier closure status, while the number and behavior of anglers were not significant. The two piers that most significantly influenced the number of entanglements both had extensive perches within 10 m of the fishing pier. The management action most likely to reduce the number of entangled pelicans appears to be deterring pelicans from perching near piers or decreasing fishing near perching structures.

show abstract

“…. Potential loss of nesting habitat in estuaries is a particular concern for the Columbia River, which currently provides nesting sites for the Pacific population's largest colony of Caspian tern (Hydroprogne caspia, approximately 18,000 birds;Suryan et al, 2004), equally as many doublecrested cormorants (Phalacrocorax auritus; Adkins and Roby, 2010), and post-breeding feeding and roosting habitat for thousands of brown pelicans(Wright et al, 2007; U.S. Fish and Wildlife Service, unpublished data).Seabirds exhibit direct responses to inter-annual (El Niño) and decadal (Pacific Decadal Oscillation/North Pacific Gyre Oscillation) changes in ocean climate The 1982The -1983.…”

mentioning

confidence: 99%

Oregon climate assessment report : December 2010

Dello¹,

Mote²

2010

View full text Add to dashboard Cite

The group of scientists that make up the Intergovernmental Panel on Climate Change found in 2007 that the warming of Earth’s climate is unequivocal and largely due to human activity. Earth’s climate has changed in the past, though the recent magnitude and pace of changes are unprecedented in human existence. Recent decades have been warmer than at any time in roughly 120,000 years. Most of this warming can be attributed to anthropogenic activity, primarily burning fossil fuels (coal, oil and natural gas) for energy. Burning fossil fuels releases carbon dioxide and other heat trapping gases, also known as greenhouse gases, into the atmosphere. This warming cannot be explained by natural causes (volcanic and solar) alone. It can be said with confidence that human activities are primarily responsible for the observed 1.5 ˚F increase in 20th century temperatures in the Paciﬁc Northwest. A warmer climate will affect this state substantially. In 2007, the Oregon State Legislature charged the Oregon Climate Change Research Institute, via HB 3543, with assessing the state of climate change science including biological, physical and social science as it relates to Oregon and the likely effects of climate change on the state. This inaugural assessment report is meant to act as a compendium of the relevant research on climate change and its impacts on the state of Oregon. This report draws on a large body of work on climate change impacts in the western US from the Climate Impacts Group at the University of Washington and the California Climate Action Team. In this report, we also identify knowledge gaps, where we acknowledge the need for more research in certain areas. We hope this report will serve as a useful resource for decision-makers, stakeholders, researchers and all Oregonians. The following chapters address key sectors that fall within the biological, physical and social sciences in the state of Oregon.

show abstract

Responses of California Brown Pelicans to Disturbances at a Large Oregon Roost

Cited by 5 publications

References 6 publications

Space Use and Movements of Adult Reddish Egrets (Egretta rufescens) During Winter

Space Use and Movements of Adult Reddish Egrets (Egretta rufescens) During Winter

The Role of Fishing Piers in Brown Pelican (Pelecanus occidentalis) Entanglement

Oregon climate assessment report : December 2010

Contact Info

Product

Resources

About