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Articles 901 - 930 of 62452
Full-Text Articles in Entire DC Network
Disparate Decadal Trends In Kaua'i Seabird Populations: Possible Effects Of Resource Competition And Anthropogenic Impacts, David Ainley, Stephanie Schneider, Gregory Spencer
Disparate Decadal Trends In Kaua'i Seabird Populations: Possible Effects Of Resource Competition And Anthropogenic Impacts, David Ainley, Stephanie Schneider, Gregory Spencer
Marine Ornithology
Population trends of seabirds nesting on Kaua‘i in the Hawaiian Islands, USA, were assessed across four decades using data from the Save Our Shearwaters (SOS) program. Started in 1979, the SOS database was intended to track the incidence of attraction of Kaua‘i’s seabirds to artificial lights, but recovery rate data also became useful to index population trends. These data documented precipitous declines of Newell’s Shearwater Puffinus newelli through 2017. Here we expand on those efforts by including four additional species and consider data to 2018. All five species exhibited increasing trends during SOS’s first decade, coincidental with increasing human population, …
When Ornithology Meets Ethnology And Archeology: The Birds Of The Bird-Cult At Rapa Nui (Easter Island) And Their Demise, Manuel Marín
When Ornithology Meets Ethnology And Archeology: The Birds Of The Bird-Cult At Rapa Nui (Easter Island) And Their Demise, Manuel Marín
Marine Ornithology
The disappearance of the bird species involved in the bird-cult of Rapa Nui (Easter Island) was examined. The cult was a contest in which the winner gathered the first seabird egg of the year from a near-shore islet, allowing the winner to become the Tangata Manu, or Birdman. This title provided a heightened status, bringing social and economic benefits and a way of being closer to their gods. Three seabird species were involved in the bird-cult: Great Frigatebird Fregata minor, Sooty Tern Onychoprion fuscatus, and the Spectacled Tern Onychoprion lunatus, none of which currently breed in the area. Rock art …
European-Asian Population Of Great White Pelican Pelecanus Onocrotalus, From Breeding To Wintering: A Review, Khashayar Mahdiany Bora, Ghazaleh Mirbazel, Mohammadjavad Tajadod
European-Asian Population Of Great White Pelican Pelecanus Onocrotalus, From Breeding To Wintering: A Review, Khashayar Mahdiany Bora, Ghazaleh Mirbazel, Mohammadjavad Tajadod
Marine Ornithology
Great White Pelican Pelecanus onocrotalus (hereafter: GWP) is an IUCN Near Threatened species having two distinct populations. The first population is a migratory European-Asian population that has an extensive Palearctic breeding range from eastern Europe to western Asia and has exhibited a sharp decline during the last couple of decades. The second population, on the other hand, is a sedentary but stable population that breeds mostly in Kenya, South Africa, and Namibia. Herein, we review the literature available on the occurrence patterns of these populations. Many studies on the migratory population show that conditions during winter have substantial impacts on …
The Potential Of Ecologists To Enhance Our Understanding Of Seabird Health, Melanie R. Wells, Annie Philips, Mary-Anne Lea, Scott Carver
The Potential Of Ecologists To Enhance Our Understanding Of Seabird Health, Melanie R. Wells, Annie Philips, Mary-Anne Lea, Scott Carver
Marine Ornithology
Ecologists play a pivotal role in the detection and investigation of population changes in seabirds and by doing so have significant potential to contribute to enhancing knowledge of seabird health. This review highlights key examples in the literature where ecologists have employed diligent passive health surveillance and/or undertaken targeted investigations of seabirds, strategies that have augmented our knowledge of seabird health at individual and population levels. Within the context of One Health, an integrated approach to perceiving and managing health, this review amalgamates veterinarian and ecology disciplines by summarising auxiliary metrics of clinical health that may be considered for incorporation …
Masthead, Pacific Seabird Group
Author Instructions, Pacific Seabird Group
Reviews: Immigrant Gone To Heaven: Dutch Polder To Canada's Frontier (Vermeer, K.); New(Ish) And Interesting Books; The Ocean's Whistleblower: The Remarkable Life And Work Of Daniel Pauly (Gremillet, D.); New Zealand Birds: A Natural History (Wilson, K.-J.), Alan E. Burger, Eric L. Wagner, Laura E. Koehn, Lloyd S. Davis
Reviews: Immigrant Gone To Heaven: Dutch Polder To Canada's Frontier (Vermeer, K.); New(Ish) And Interesting Books; The Ocean's Whistleblower: The Remarkable Life And Work Of Daniel Pauly (Gremillet, D.); New Zealand Birds: A Natural History (Wilson, K.-J.), Alan E. Burger, Eric L. Wagner, Laura E. Koehn, Lloyd S. Davis
Marine Ornithology
No abstract provided.
In Memoriam: William (Bill) R.P. Bourne, 1930-2021, Pat Baird
In Memoriam: William (Bill) R.P. Bourne, 1930-2021, Pat Baird
Marine Ornithology
This tribute is a compilation of obituaries by Michael Harris and Mark Tasker, Craig Harrison's speech at the ceremony for Bill's Pacific Seabird Group (PSG) Lifetime Achievement Award in 1997, Michael Harris's eulogy at Bill's memorial service in Scotland, and emails I have received from PSG members, as well as from my memories of a very long friendship with Bill and his wife Sheila spanning over 30 years.
Melanism In A Common Murre Uria Aalge In Kachemak Bay, Alaska, Sarah K. Schoen, Mayumi L. Arimitsu, Caitlin E. Marsteller, Brielle M. Heflin
Melanism In A Common Murre Uria Aalge In Kachemak Bay, Alaska, Sarah K. Schoen, Mayumi L. Arimitsu, Caitlin E. Marsteller, Brielle M. Heflin
Marine Ornithology
In accord with melanism being uncommon in birds, we could find only six published records of completely melanistic Common Murres Uria aalge, one of the most widely and intensively studied of all seabirds. We added to the record by observing a Common Murre in completely dark, melanistic alternate plumage every summer from 2017 to 2021 at Gull Island in Kachemak Bay, Alaska, USA. In 2017, the bird frequented the colony periphery, indicating that it could have been a subadult. Subsequently, it occupied the same narrow rock ledge within the colony every summer from 2018 to 2021, an indication that it …
The Influence Of Breeding Status And Nest Site Location On Marine Habitat Use By Marbled Murrelet Brachyramphus Marmoratus, Sonya A. Pastran, David B. Lank, Patrick D. O’Hara, Russell W. Bradley, Cecilia Lougheed, Lynn W. Lougheed, Nadine R. Parker, Laura A. Mcfarlane Tranquilla, Elizabeth A. Krebs, Fred Cooke, Douglas F. Bertram
The Influence Of Breeding Status And Nest Site Location On Marine Habitat Use By Marbled Murrelet Brachyramphus Marmoratus, Sonya A. Pastran, David B. Lank, Patrick D. O’Hara, Russell W. Bradley, Cecilia Lougheed, Lynn W. Lougheed, Nadine R. Parker, Laura A. Mcfarlane Tranquilla, Elizabeth A. Krebs, Fred Cooke, Douglas F. Bertram
Marine Ornithology
The Marbled Murrelet Brachyramphus marmoratus is a threatened seabird that relies on old-growth forest for nesting. We compare marine space use between breeding and non-breeding birds, and how marine home range locations and overlap vary with respect to nesting location and breeding status. We collected very high frequency (VHF) radio-telemetry data in southern British Columbia from Clayoquot Sound (190 birds; 2000–2002) and Desolation Sound (206 birds; 1998–2001). The sites differ strongly in their oceanic exposure and surrounding terrestrial features. Kernel utilization distribution-based estimates showed that breeders and non-breeders had similar overall distributions, but breeders were more spatially aggregated. Pooled home …
Breeding Parameters Of Yellow-Legged Gull Larus Michahellis In The Largest Moroccan Colony: Natural Versus Urban Nesting Sites, Siham Bellout, Moulay Abdeljalil Ait Baamrane, Mohamed Aourir
Breeding Parameters Of Yellow-Legged Gull Larus Michahellis In The Largest Moroccan Colony: Natural Versus Urban Nesting Sites, Siham Bellout, Moulay Abdeljalil Ait Baamrane, Mohamed Aourir
Marine Ornithology
We investigated the main differences in the breeding ecology of Yellow-legged Gulls Larus michahellis nesting in urban (city of Essaouira) and natural (Mogador Island) environments on the African Atlantic coast of west-central Morocco during the 2018 and 2019 breeding seasons. This Yellow-legged Gull population is the largest in the southern portion of this species’ range, making it excellent for research on the breeding biology of marginal populations. Over two years, we collected data on nest density, chronology, clutch size, egg dimensions, and hatching success from nests across the city and island. Results showed that nest density averaged 1.26 ± 1.03 …
Identification Of Marine Important Conservation Areas For Mediterranean Storm Petrels Hydrobates Pelagicus Melitensis Breeding In Sardinia, Italy, Federico De Pascalis, Danilo Pisu, David Pala, Andrea Benvenuti, Francesca Visalli, Eugenio Carlon, Lorenzo Serra, Diego Rubolini, Jacopo G. Cecere
Identification Of Marine Important Conservation Areas For Mediterranean Storm Petrels Hydrobates Pelagicus Melitensis Breeding In Sardinia, Italy, Federico De Pascalis, Danilo Pisu, David Pala, Andrea Benvenuti, Francesca Visalli, Eugenio Carlon, Lorenzo Serra, Diego Rubolini, Jacopo G. Cecere
Marine Ornithology
Marine predators are an important component of marine trophic webs, and their decline has important consequences on whole ecosystem dynamics. Understanding their movements and habits is vital for conservation, yet extremely challenging. Tracking technologies, coupled with a robust, reproducible, and quantitative analytical framework, are being used to successfully identify Important Conservation Areas (ICAs) for seabirds, which are wide-ranging and declining marine predators. However, the identification of such areas is skewed towards large-bodied seabird species, and there are few marine ICAs for small-bodied birds like storm petrels. We GPS-tracked Mediterranean Storm Petrels Hydrobates pelagicus melitensis breeding in northwestern Sardinia over three …
Nesting Distribution Of Masked Booby Sula Dactylatra At Trindade Island, Western South Atlantic Ocean, Victória R.F. Benemann, Leonardo D. Araújo, Arthur Z. Fabbris, Rosalinda C. Montone, Maria V. Petry
Nesting Distribution Of Masked Booby Sula Dactylatra At Trindade Island, Western South Atlantic Ocean, Victória R.F. Benemann, Leonardo D. Araújo, Arthur Z. Fabbris, Rosalinda C. Montone, Maria V. Petry
Marine Ornithology
The Masked Booby Sula dactylatra is a surface-nesting seabird that breeds on offshore islands across the tropical and subtropical oceans. On inaccessible rocky areas on Trindade Island, located about 1200 km from Espírito Santo, Brazil, the nesting of this species has been poorly studied. To model the species’ nesting habitat suitability at Trindade Island, we mapped active nests during the breeding seasons of 2017 and 2019, from October to November, using a hand-held Global Positioning System receiver and an Unmanned Aerial Vehicle. In order to identify key areas, we created nesting habitat suitability maps using seven different algorithms (Random Forest, …
Foraging Ecology Of Red-Billed Tropicbird Phaethon Aethereus In The Caribbean During Early Chick Rearing Revealed By Gps Tracking, Hannah Madden, Yvan Satgé, Bradley Wilkinson, Patrick G.R. Jodice
Foraging Ecology Of Red-Billed Tropicbird Phaethon Aethereus In The Caribbean During Early Chick Rearing Revealed By Gps Tracking, Hannah Madden, Yvan Satgé, Bradley Wilkinson, Patrick G.R. Jodice
Marine Ornithology
Investigating the foraging patterns of tropical seabirds can provide important information about their ocean habitat affinities as well as prey choice. Foraging studies of Red-billed Tropicbird Phaethon aethereus populations in the Caribbean are lacking. We sought to rectify this by opportunistically sampling regurgitates at nest sites on the island of St. Eustatius, Lesser Antilles, and by linking the GPS tracks of foraging adults to remotely sensed environmental variables. Diet samples were dominated by Exocoetidae (59.5%) and Belonidae (14.9%), although we were unable to identify 25.5% of samples due to digestion. Tropicbirds nesting on St. Eustatius exhibited diurnal foraging patterns, foraged …
Owl Depredation At A Re-Establishing Colony Of White-Faced Storm Petrel Pelagodroma Marina, Nicholas Carlile, Chris Lloyd
Owl Depredation At A Re-Establishing Colony Of White-Faced Storm Petrel Pelagodroma Marina, Nicholas Carlile, Chris Lloyd
Marine Ornithology
We report the depredation by a single Eastern Barn Owl Tyto javanica delicatula on prospecting White-faced Storm Petrels Pelagodroma marina during the re-establishment phase of a colony on Big Island, off Port Kembla, New South Wales, Australia in 2018. Storm petrels were likely extirpated from this colony 56 years previously when invasive weeds rendered their habitat inaccessible. Restoration of vegetation together with storm petrel call broadcasting, commencing in 2014, resulted in significant increases in prospecting numbers, culminating in breeding (three pairs) in the 2017/18 austral summer season. A significant depredation event (> 59 adults) occurred between August and September 2018, …
Successful Breeding By Black-Legged Kittiwakes Rissa Tridactyla At The Only Colony Along Canada's Pacific Coast, Kirk A. Hart, Kenneth G. Wright, Vivian Pattison, J. Mark Hipfner
Successful Breeding By Black-Legged Kittiwakes Rissa Tridactyla At The Only Colony Along Canada's Pacific Coast, Kirk A. Hart, Kenneth G. Wright, Vivian Pattison, J. Mark Hipfner
Marine Ornithology
The Black-legged Kittiwake Rissa tridactyla is a widely distributed and well-studied northern hemisphere seabird. Authoritative publications document the existence of breeding colonies in Canada’s Arctic and Atlantic regions but not in the Pacific region. We visited the small (ca. 50 pairs in recent years) kittiwake breeding colony at Holland Rock, British Columbia, in July and August 2021, and documented what we believe to be the first record of successful breeding at this site. Previous records have documented successful breeding no further south than 58° latitude in Alaska, ~600 km to the north, making Holland Rock the southernmost colony in the …
Masthead, Pacific Seabird Group
Author Instructions, Pacific Seabird Group
Reviews: How Birds Evolve: What Science Reveals About Their Origin, Lives And Diversity (Futuyma, Douglas J.); Seabirds: The New Identification Guide (Harrison, P., Perrow, M. & Larsson, H.); The Puffin Plan: Restoring Seabirds To Egg Rock And Beyond (Kress, S.W., Jackson, D.Z.); The Future We Choose: Surviving The Climate Crisis (Figueres, C. & Rivett-Carnac., T.), Anthony J. Gaston, Ian L. Jones, Holly P. Jones, Adalie A. Keltner, Christy N. Wails, George Divoky, Rachel T. Buxton
Reviews: How Birds Evolve: What Science Reveals About Their Origin, Lives And Diversity (Futuyma, Douglas J.); Seabirds: The New Identification Guide (Harrison, P., Perrow, M. & Larsson, H.); The Puffin Plan: Restoring Seabirds To Egg Rock And Beyond (Kress, S.W., Jackson, D.Z.); The Future We Choose: Surviving The Climate Crisis (Figueres, C. & Rivett-Carnac., T.), Anthony J. Gaston, Ian L. Jones, Holly P. Jones, Adalie A. Keltner, Christy N. Wails, George Divoky, Rachel T. Buxton
Marine Ornithology
No abstract provided.
Editorial: 50 Volumes Of Marine Ornithology, 1976-2022: The Founding Editor Looks Back, John Cooper
Editorial: 50 Volumes Of Marine Ornithology, 1976-2022: The Founding Editor Looks Back, John Cooper
Marine Ornithology
No abstract provided.
Albatross And Petrel Interactions With An Artisanal Squid Fishery In Southern Peru During El Niño, 2015-2017, Cristian Moreno, Javier Quiñones
Albatross And Petrel Interactions With An Artisanal Squid Fishery In Southern Peru During El Niño, 2015-2017, Cristian Moreno, Javier Quiñones
Marine Ornithology
We report on the occurrence of albatrosses (Diomedeidae) and petrels (Procellariidae) associated with an artisanal small-scale fishery (SSF) for Humboldt Squid Dosidicus gigas in waters of southern Peru during El Niño 2015–2016 and coastal El Niño 2017. We deployed as observers on a number of fishing trips to assess seabird interactions. White-chinned Petrels Procellaria aequinoctialis and Waved Albatross Phoebastria irroata were the most abundant species observed, followed by Salvin’s Thalassarche salvini and Chatham T. eremita albatross, and Cape Petrels Daption capense. The majority of procellariid species (> 60% of total birds) visited while vessels were positioned over the continental slope. …
Infanticide In Highly Urbanized Colonies Of Black Skimmers Rynchops Niger, Elizabeth A. Forys, Sarah K. Beres, Abigail L. Mckay, Olivia N. Spicer
Infanticide In Highly Urbanized Colonies Of Black Skimmers Rynchops Niger, Elizabeth A. Forys, Sarah K. Beres, Abigail L. Mckay, Olivia N. Spicer
Marine Ornithology
Infanticide, which is the killing of dependent offspring, occurs in many species of colonial seabirds. Most infanticide attempts are made when chicks wander outside their parents’ territories and are more likely to occur when the colony experiences a disturbance or food is limited. Our objective was to determine the rate of infanticide at three Black Skimmer Rynchops niger colonies located on highly urbanized beaches in Pinellas County, Florida, USA. Infanticide occurred 42 times during 3 223 hours of monitoring (0.013 attempts per hour) over four breeding seasons (2018–2021). More than one third of the infanticide attempts occurred after a disturbance, …
Historical Distribution And Current Population Status Of Tufted Puffins Fratercula Cirrhata In Canada's California Current System, Louise K. Blight, Gregory Mcclelland
Historical Distribution And Current Population Status Of Tufted Puffins Fratercula Cirrhata In Canada's California Current System, Louise K. Blight, Gregory Mcclelland
Marine Ornithology
Unpublished accounts indicate that the number of Tufted Puffin Fratercula cirrhata colonies in western Canada has declined in recent decades. However, a lack of recent colony count data makes it impossible to determine current trends. Here we compile published and unpublished information for Tufted Puffins in the Canadian portion of the California Current System (i.e., from the vicinity of the Scott Islands south to the Canada-US border) to update understanding of the species’ status in the region, and to assemble available information in a single source. We found historical records of three additional colonies over those in pre-existing compilations, bringing …
No Evidence Of Avian Malaria In Two Mediterranean Endemic Seabirds, Luca Ilahiane, Federico De Pascalis, Danilo Pisu, David Pala, Federica Ferrario, Marco Cucco, Diego Rubolini, Jacopo G. Cecere, Irene Pellegrino
No Evidence Of Avian Malaria In Two Mediterranean Endemic Seabirds, Luca Ilahiane, Federico De Pascalis, Danilo Pisu, David Pala, Federica Ferrario, Marco Cucco, Diego Rubolini, Jacopo G. Cecere, Irene Pellegrino
Marine Ornithology
In birds, pathogens and diseases—such as avian malaria—can have severe detrimental effects on individual fitness. Pathogen prevalence can vary across species and may differ between populations living in different localities, but screening can aid in our understanding of a disease’s distribution and parasite-host interactions. Although seabirds generally exhibit low avian malaria infection patterns, blood parasites of several species and populations have never been investigated in detail. Using molecular techniques, we screened for blood parasites in two Mediterranean seabirds, the Scopoli’s Shearwater Calonectris diomedea and the Mediterranean Storm Petrel Hydrobates pelagicus melitensis. In addition, we searched for and sampled potential vector …
Winter Colony Attendance By Adult Southern Giant Petrels Macronectes Giganteus: Implications For Rodent Eradications, Peter G. Ryan, Steffen Oppel
Winter Colony Attendance By Adult Southern Giant Petrels Macronectes Giganteus: Implications For Rodent Eradications, Peter G. Ryan, Steffen Oppel
Marine Ornithology
Southern Giant Petrels Macronectes giganteus are partial migrants, but the proportion of adult males and females that visit the colony on Gough Island during winter is poorly defined. A better understanding of winter colony attendance is important to predict the possible impact of non-target mortality during restoration efforts involving poison baiting to eradicate introduced mammals. We repeatedly checked the individual identity of all giant petrels attending the largest breeding colony on Gough Island for rings during April–May 2021. Although the maximum number of individually identifiable ringed adults in a single check was 202, overall, 353 ringed adults were recorded, including …
Masthead, Pacific Seabird Group
Reviews: Hope Matters: Why Changing The Way We Think Is Critical To Solving The Environmental Crisis (Kelsey, E.); The Gull Next Door: Portrait Of A Misunderstood Bird (Taylor, M.), Rachel T. Buxton, Madeleine Goumas
Reviews: Hope Matters: Why Changing The Way We Think Is Critical To Solving The Environmental Crisis (Kelsey, E.); The Gull Next Door: Portrait Of A Misunderstood Bird (Taylor, M.), Rachel T. Buxton, Madeleine Goumas
Marine Ornithology
No abstract provided.
Author Instructions, Pacific Seabird Group
Threats And Conservation Status Of Common And Roseate Terns Sterna Hirundo/S. Dougallii In The Azores: A Case Study For Terceira Island, Lucas Lamelas-López, Malgorzata Pietrzak, Miguel Ferreira, Veronica C. Neves
Threats And Conservation Status Of Common And Roseate Terns Sterna Hirundo/S. Dougallii In The Azores: A Case Study For Terceira Island, Lucas Lamelas-López, Malgorzata Pietrzak, Miguel Ferreira, Veronica C. Neves
Marine Ornithology
The Azores Archipelago holds the second most important population of Roseate Terns in the North Atlantic. However, the size of the population has been decreasing. In this study, we used remote-sensing cameras and visits to the main colonies of Common Terns Sterna hirundo and Roseate Terns S. dougallii on Terceira Island to identify the causes of breeding failure. Nest depredation by introduced mammals, particularly rats and cats, was the main cause of breeding failure, leading, in some cases, to the complete destruction of the colony. Additional threats included nest disturbance by humans and dogs, which caused the destruction of some …
Normal Physical Parameters Characterizing Galapagos Marine Birds, Gustavo Jiménez-Uzcátegui, Patricio D. Carrera-Játiva, Soledad Sarzosa, Edison Encalada, Richar Rodríguez-Hidalgo, Erika (Travis) Crook, Christian Sevilla
Normal Physical Parameters Characterizing Galapagos Marine Birds, Gustavo Jiménez-Uzcátegui, Patricio D. Carrera-Játiva, Soledad Sarzosa, Edison Encalada, Richar Rodríguez-Hidalgo, Erika (Travis) Crook, Christian Sevilla
Marine Ornithology
The Galapagos Penguin Spheniscus mendiculus (GAPE), Flightless Cormorant Phalacrocorax harrisi (FLCO), and Waved Albatross Phoebastria irrorata (WAAL) are marine birds that are endemic to the Galapagos Islands. To provide health information for these three species, baseline data on several physiological parameters were collected non-invasively—from individuals and populations appearing to be healthy—during the course of physical examinations that were conducted from 2011–2019. Heart rate, respiratory rate, body temperature, and body condition (weight vs. morphometric measurements) were analyzed as a function of age and sex. Mean heart rate differed significantly between juveniles and adults in all three species. Respiratory rate and body …