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Articles 301 - 330 of 42908
Full-Text Articles in Entire DC Network
Fish Prey Of The Peruvian Tern Sternula Lorata Along The Northern Coast Of Chile, Yerko A. Vilina, Luis Pastenes, Beatriz Munizaga, Frederick Toro, Álvaro Neira-Soto, Blanca E. Molina-Burgos
Fish Prey Of The Peruvian Tern Sternula Lorata Along The Northern Coast Of Chile, Yerko A. Vilina, Luis Pastenes, Beatriz Munizaga, Frederick Toro, Álvaro Neira-Soto, Blanca E. Molina-Burgos
Marine Ornithology
Scarce information is available on the trophic ecology and feeding habitats of the Peruvian Tern Sternula lorata. We searched 15 Peruvian Tern colonies along the coast of northern Chile during the breeding seasons of 2008 to 2018 to evaluate the tern’s main food source. We collected samples of prey remains found near nests as well as prey items regurgitated by chicks and adults during our visits. We found that the Peruvian Tern is mainly piscivorous, secondarily feeding on some cephalopods and euphausiids. Pacific Saury Scomberesox saurus and Paloma Pompano Trachinotus paitensis were the main prey found near nests, but regurgitated …
Ecological Experiences And Perceptions Of Small-Scale Gillnet And Purse Seine Fishers On Seabirds And Other Non-Target Taxa In The Humboldt Current System, Chile, Cristián G. Suazo, Cristóbal Anguita, Jaime Ojeda, Guillermo Luna-Jorquera, Maritza Sepúlveda, Oliver Yates
Ecological Experiences And Perceptions Of Small-Scale Gillnet And Purse Seine Fishers On Seabirds And Other Non-Target Taxa In The Humboldt Current System, Chile, Cristián G. Suazo, Cristóbal Anguita, Jaime Ojeda, Guillermo Luna-Jorquera, Maritza Sepúlveda, Oliver Yates
Marine Ornithology
Strategies to reduce the negative impacts of fisheries on ecosystems often come into conflict with fishers who have different experiences with, and perceptions of, biodiversity compared to policy makers and fisheries managers. We interviewed 800 fishers along 2400 kilometers of the Humboldt Current System (HCS) coast, assessing fishers’ perceptions of the impacts of marine predators on fishing and their proposals to reduce conflicts with small-scale net fisheries. Vessel captains saw seabirds as positive indicators of fish presence along the HCS (mean probability 62.7%). In contrast, sea lions were perceived negatively, affecting catches for all fishers and causing fishing gear damage …
Insights Into The Ecology And Conservation Of Coastal Brazil Seabirds Based On Band Returns, Henrique Chupil, Rosane Fernanda Farah, Andrea Maranho, Carla Beatriz Barbosa, Simone Leonardi, Juarez Cabral, Jenyffer Vierheller Vieira, Liana Rosa, Rodrigo Del Rio Do Valle
Insights Into The Ecology And Conservation Of Coastal Brazil Seabirds Based On Band Returns, Henrique Chupil, Rosane Fernanda Farah, Andrea Maranho, Carla Beatriz Barbosa, Simone Leonardi, Juarez Cabral, Jenyffer Vierheller Vieira, Liana Rosa, Rodrigo Del Rio Do Valle
Marine Ornithology
Banding is the main method used to mark and identify individual birds, and to study populations, migration, age, and behavior. Banding birds also plays an important role in rehabilitation efforts, as their recapture provides good information about the effectiveness of the prescribed treatment, allowing constant review of the rehabilitation protocols used. This study compiles information on banded birds retrieved at the Santos Basin Beach Monitoring Project (Projeto de Monitoramento de Praias da Bacia de Santos, PMP-BS), and it reviews the ecological and behavioral aspects involved in species’ movements that contributed to their arrival at the beach. We also provide results …
Autumn Marine Bird Populations In Queen Charlotte Strait And Adjacent Waters: A Candidate For Iba/Kba Status, Anthony J. Gaston, Mark Maftei, Sonya A. Pastran
Autumn Marine Bird Populations In Queen Charlotte Strait And Adjacent Waters: A Candidate For Iba/Kba Status, Anthony J. Gaston, Mark Maftei, Sonya A. Pastran
Marine Ornithology
Systematic transect surveys of marine birds in eastern Queen Charlotte Strait and the western part of Johnstone Strait, British Columbia, Canada, were made between mid-August and mid-October 2020–2022. All birds within 100-m transect strips were counted and numbers corrected for detectability. Extrapolating within five regions of differing ecological characteristics and seabird densities, our results indicate that the study area supported 1% or more of the North American populations of Pigeon Guillemot Cepphus columba, Marbled Murrelet Brachyramphus marmoratus, California Gull Larus californicus, Glaucous-winged Gull L. glaucescens, Iceland Gull L. glaucoides, and Short-billed Gull L. brachyrhynchos. Our estimation of gull species in …
Masthead, Pacific Seabird Group
Inside Front Cover, Pacific Seabird Group
Contents, Pacific Seabird Group
Author Instructions, Pacific Seabird Group
A Systematic Review Of Trends In Research On Seabird Behavioral Flexibility, M. Candelaria Biagiotti Barchiesi, Laura M. Biondi, German O. García
A Systematic Review Of Trends In Research On Seabird Behavioral Flexibility, M. Candelaria Biagiotti Barchiesi, Laura M. Biondi, German O. García
Marine Ornithology
There has been an increase in interest in the study of behavioral flexibility for its role in how organisms face disturbances and changes in their environment. However, there is not much research on this topic for seabirds, whose conservation status is affected by multiple issues related to changes in their environment. The goal of this paper was to analyze research on seabird behavioral flexibility and to identify knowledge gaps. A systematic review was conducted using academic search engines that included articles published from 1986 to 2022. In the 143 articles that were analyzed, the following were identified: publication date, family …
Diet Assessment And Vulnerability Of White-Faced Storm Petrel Pelagodroma Marina Within A Warming Hotspot, Madhuli Karmalkar, Lauren Roman, Farzana Kastury, Fernando Arce, Kerrie M. Swadling
Diet Assessment And Vulnerability Of White-Faced Storm Petrel Pelagodroma Marina Within A Warming Hotspot, Madhuli Karmalkar, Lauren Roman, Farzana Kastury, Fernando Arce, Kerrie M. Swadling
Marine Ornithology
Shifts in zooplankton communities due to changing ocean climate can affect foraging patterns among planktivorous seabirds. To better understand seabird response to environmental change in Bass Strait, southeast Australia, we investigated the prey species and 16 elements in prey and feathers of the planktivorous White-faced Storm Petrel Pelagodroma marina. The krill Nyctiphanes australis was the most abundant prey species, followed by several species of post-larval fish; otherwise, the species appeared to be a generalist feeder. Element concentrations of feathers were not significantly influenced by dietary composition. Likewise, element concentrations did not significantly differ between major prey species, confirming that the …
Best Practices For Using Drones In Seabird Monitoring And Research, Alice J. Edney, Tom Hart, Mark J. Jessopp, Alex Banks, Lucy E. Clarke, Laure Cugnière, Kyle H. Elliot, Ignacio Juarez Martinez, Alexandra Kilcoyne, Matthew Murphy, Ruedi G. Nager, Norman Ratcliffe, Danielle L. Thompson, Robin M. Ward, Matt J. Wood
Best Practices For Using Drones In Seabird Monitoring And Research, Alice J. Edney, Tom Hart, Mark J. Jessopp, Alex Banks, Lucy E. Clarke, Laure Cugnière, Kyle H. Elliot, Ignacio Juarez Martinez, Alexandra Kilcoyne, Matthew Murphy, Ruedi G. Nager, Norman Ratcliffe, Danielle L. Thompson, Robin M. Ward, Matt J. Wood
Marine Ornithology
Over the past decade, drones have become increasingly popular in environmental biology and have been used to study wildlife on all continents. Drones have become of global importance for surveying breeding seabirds by providing opportunities to transform monitoring techniques and allow new research on some of the most threatened birds. However, such fast-changing and increasingly available technology presents challenges to regulators responding to requests to carry out surveys and to researchers ensuring their work follows best practices and meets legal and ethical standards. Following a workshop convened at the 14th International Seabird Group Conference and a subsequent literature search, we …
Parental Infanticide By Egg Destruction In Red-Billed Tropicbirds Phaethon Aethereus On The Caribbean Island Of Sint Eustatius, Hailley Danielson-Owczynsky, Hannah Madden, Patrick G.R. Jodice
Parental Infanticide By Egg Destruction In Red-Billed Tropicbirds Phaethon Aethereus On The Caribbean Island Of Sint Eustatius, Hailley Danielson-Owczynsky, Hannah Madden, Patrick G.R. Jodice
Marine Ornithology
Avian reproduction is a process that requires extensive energetic input by parents, particularly in pelagic seabirds. Parental infanticide has rarely been reported in pelagic seabirds, and its frequency among taxa is therefore difficult to determine. Using data from remote cameras, two cases of probable parental infanticide in Red-billed Tropicbirds Phaethon aethereus were captured on Sint Eustatius in the 2021–2022 breeding season. Both cases are presented with images collected from remote cameras as evidence. While appearing counterproductive, parental infanticide may provide an alternative reproduction strategy that favors lifetime reproductive success over short term success.
A Modest Proposal-Seabirds Are Marine Creatures First, Land-Based Marine Predators Second, David Ainley, Michael Johns
A Modest Proposal-Seabirds Are Marine Creatures First, Land-Based Marine Predators Second, David Ainley, Michael Johns
Marine Ornithology
Evidence indicates that members of the marine bird research and management communities should view seabirds from the seabirds’ perspective, as marine organisms, rather than the pervading view derived from human’s interaction with the sea, i.e., as temporary visitors centered on home ports. By doing so, research results and management plans will be more realistic and effective. Seabirds themselves only temporarily visit land in their reproductive attempts, with most of their time otherwise spent at sea, as much as 90% in the lifetimes of some species. This is especially true among seabirds of the more productive stretches of water, such as …
First Record Of Long-Tailed Skua Stercorarius Longicaudus In Terre Adélie (140°1'E–66°40'S), Agnès Lewden, Servane Kiss, Téo Barracho, Christophe Barbraud
First Record Of Long-Tailed Skua Stercorarius Longicaudus In Terre Adélie (140°1'E–66°40'S), Agnès Lewden, Servane Kiss, Téo Barracho, Christophe Barbraud
Marine Ornithology
On 17 January 2023, a Long-tailed Skua Stercorarius longicaudus was observed and photographed along the coast of Terre Adélie (67–90°S, 136–142°E). This is the first observation of this species at this locality since seabird monitoring began in 1952, and it is only the second report of this species at latitudes this far south.
Long-Term Dynamics Of Seabird Species Composition Across The Drake Passage, Ihor V. Dykyy, Olexander O. Salganskiy, Anatolii P. Chernov, Vladlen M. Trokhymets
Long-Term Dynamics Of Seabird Species Composition Across The Drake Passage, Ihor V. Dykyy, Olexander O. Salganskiy, Anatolii P. Chernov, Vladlen M. Trokhymets
Marine Ornithology
We present standardized, quantitative information on the avifauna of the Drake Passage obtained during six crossings between Patagonia and the South Shetland Islands during the summer–autumn period, 1998–2020. We compare inter-annual and seasonal patterns of species occurrence, adding to previous, published surveys, and we discuss species association with the different zones and water masses of the region.
Estimating The Impact Of Marine Threats To Seabird Recovery After Predator Eradication, Stephanie B. Borrelle, Holly P. Jones, Yvan Richard, Roberto Salguero-Gómez
Estimating The Impact Of Marine Threats To Seabird Recovery After Predator Eradication, Stephanie B. Borrelle, Holly P. Jones, Yvan Richard, Roberto Salguero-Gómez
Marine Ornithology
Pelagic seabirds are one of the most threatened taxa due to sustained and intensifying threats at their breeding sites on land and when foraging at sea. Predator eradication at seabird breeding sites has become a key strategy for the long-term conservation and viability of seabird populations. However, the extent to which increasing marine threats (i.e., those causing excess mortality such as fisheries bycatch, plastic ingestion, climate change/prey depletion) impact recovery remains poorly understood. We used computer simulations to model demographic data obtained from a review of existing databases to explore the impact of direct marine threats to seabird recovery following …
Interactions Between Seabirds And Sharks At A Fur Seal Carcass, Simon B.Z. Gorta, Brittany Brockett, Shoshana Rapley
Interactions Between Seabirds And Sharks At A Fur Seal Carcass, Simon B.Z. Gorta, Brittany Brockett, Shoshana Rapley
Marine Ornithology
The transfer of nutrients and energy from carcasses to scavengers is an important ecosystem function. In marine ecosystems, mammal carcasses can represent a spatiotemporally restricted but substantial pulse in resource availability, as they are typically only briefly available to scavengers on the surface. Little is understood about how these scavengers respond to such pulses, or how inter-scavenger interactions may influence their behaviour. We describe scavenging interactions of procellariiform seabirds at a fresh and floating New Zealand Fur Seal Arctocephalus forsteri carcass, recently killed by a White Shark Carcharodon carcharias, over the continental slope of southeastern Australia. We highlight potential exclusive …
Coastal Bird Community Change Following An Increase Of Pinnipeds At A Site In Northern Argentina: A 14-Year Study, María Paula Berón, Maximiliano Manuel Hernandez, Juan Pablo Seco Pon
Coastal Bird Community Change Following An Increase Of Pinnipeds At A Site In Northern Argentina: A 14-Year Study, María Paula Berón, Maximiliano Manuel Hernandez, Juan Pablo Seco Pon
Marine Ornithology
We report here changes in bird assemblages over a 14-year interval at the Port of Mar del Plata, Argentina, and the adjacent beach before (PRE) and after (POST) South American Sea Lions Otaria flavescens increased at a local haul-out. Abundance and number of bird species were compared between periods, between sites (beach, sea lion rookery, and port sheds), and between breeding and non-breeding seasons of the birds’ annual cycle. A total of 13 116 birds belonging to 15 species were recorded. Total bird abundance was higher during the POST period compared to the PRE period, regardless of the season. Larids …
Oiling Threats To Marine Birds On Southern Vancouver Island, British Columbia, Canada, Douglas F. Bertram, Patrick D. O’Hara, Alexandra M. King, Clifford L.K. Robinson, Mark Maftei, Kerry J. Woo
Oiling Threats To Marine Birds On Southern Vancouver Island, British Columbia, Canada, Douglas F. Bertram, Patrick D. O’Hara, Alexandra M. King, Clifford L.K. Robinson, Mark Maftei, Kerry J. Woo
Marine Ornithology
Information on the distribution and abundance of marine birds is needed to evaluate current status in relation to threats from potential increases in vessel traffic off southern Vancouver Island, British Columbia (BC), Canada, in the Salish Sea. We conducted year-round boat based surveys in waters between Sidney, BC and Victoria, BC from November 2015 to August 2019 and examined seasonal variation in bird distribution and abundance. Our study area included parts of the Sidney Channel Important Bird Area, the Shoal Harbour and Victoria Harbour Migratory Bird Sanctuaries, and the Chain Islets Ecological Reserve, adjacent to major shipping lanes, as well …
Stranded Humboldt Penguins Spheniscus Humboldti With Bilateral Blindness Along Chilean Coasts, Alberto J. Alaniz, Catalina Espinoza-Contreras, Isabel Hernández, Pablo M. Vergara, Darío Moreira-Arce, Mario A. Carvajal, Claudia Hidalgo-Corrotea, Ana Francisca Soto
Stranded Humboldt Penguins Spheniscus Humboldti With Bilateral Blindness Along Chilean Coasts, Alberto J. Alaniz, Catalina Espinoza-Contreras, Isabel Hernández, Pablo M. Vergara, Darío Moreira-Arce, Mario A. Carvajal, Claudia Hidalgo-Corrotea, Ana Francisca Soto
Marine Ornithology
Bilateral blindness is an important cause of mortality in penguin chicks. However, this pathological condition remains little explored for the endangered Humboldt Penguin Spheniscus humboldti. Here, we present the first spatiotemporal dataset detailing young Humboldt Penguins having bilateral blindness. Information was gathered from birds found stranded along the coast of continental Chile over a ten-year (2011– 2021) period. We present a number of cases analyzed by geographical distribution, sex, body mass, and season. Preliminary analysis shows that 73.3% of cases were concentrated along Chile’s central coast. Only 17.1% of individuals were sexed, and the distribution was slightly skewed in favor …
Reproductive Indices Of Common Murres Uria Aalge And Marbled Murrelets Brachyramphus Marmoratus Indicate Murrelets Are More Resilient During Poor Years, Craig S. Strong, Adam Duarte
Reproductive Indices Of Common Murres Uria Aalge And Marbled Murrelets Brachyramphus Marmoratus Indicate Murrelets Are More Resilient During Poor Years, Craig S. Strong, Adam Duarte
Marine Ornithology
Fledgling encounter rates at sea were used as measures of annual reproductive performance for Common Murres Uria aalge and Marbled Murrelets Brachyramphus marmoratus over 29 years in two marine biogeographic regions off the coast of Oregon, USA, north and south of Cape Blanco. In both bioregions, the adult murre population was much larger and the encounter rate of murre fledglings was much higher than for murrelets overall, but the apparent decline in productivity during El Niño events and years of poor foraging was significantly greater in murres than in murrelets. We conclude that murrelets are better at coping with variations …
Slender-Billed Gull Chroicocephalus Genei, A New Bird For Indonesia, Muhammad Iqbal, Afan Absori, Agus Prabowo, Arum Setiawan, David Handoko, Yeni Aryati Mulyani, Sena Hadiwijaya, Yogi Dwi Saputro, Indra Yustian, Hilda Zulkifli
Slender-Billed Gull Chroicocephalus Genei, A New Bird For Indonesia, Muhammad Iqbal, Afan Absori, Agus Prabowo, Arum Setiawan, David Handoko, Yeni Aryati Mulyani, Sena Hadiwijaya, Yogi Dwi Saputro, Indra Yustian, Hilda Zulkifli
Marine Ornithology
We report a Slender-billed Gull Chroicocephalus genei seen on 08 February 2023 in the Banyuasin Peninsula, South Sumatra Province, Indonesia, the first record of this species in Indonesia. Its presence was 02° latitude farther south than its previously known global distributional range.
Impacts Of Depredation By Large-Billed Crows Corvus Macrorhynchos On The Colony Of Japanese Murrelets Synthliboramphus Wumizusume At Eboshijima, Japan, Praeploy Kongsurakan, Toru Nakahara, Noriyuki M. Yamaguchi
Impacts Of Depredation By Large-Billed Crows Corvus Macrorhynchos On The Colony Of Japanese Murrelets Synthliboramphus Wumizusume At Eboshijima, Japan, Praeploy Kongsurakan, Toru Nakahara, Noriyuki M. Yamaguchi
Marine Ornithology
Eboshijima, Japan is a small island in the Tsushima Strait that hosts a small colony of Japanese Murrelet Synthliboramphus wumizusume, an endangered seabird that breeds in the warm Kuroshio Current region around Japan and South Korea. We conducted a study to investigate the effects of depredation by Large-billed Crows Corvus macrorhynchos on murrelets after discovering 29 carcasses and 50 eggshells depredated by crows in four survey plots at Eboshijima in 2022. Trail cameras captured crows during daylight hours from 06h59 to 16h45. To estimate the existing population of Japanese Murrelet and predict scenarios that demonstrate the effects of corvid depredation …
Medical History And Post-Release Survival Of Rehabilitated California Brown Pelicans Pelecanus Occidentalis Californicus, 2009-2019, Rebecca S. Duerr, Deborah L. Jaques, Barton G. Selby, Julie S. Skoglund, Suzanne Kosina
Medical History And Post-Release Survival Of Rehabilitated California Brown Pelicans Pelecanus Occidentalis Californicus, 2009-2019, Rebecca S. Duerr, Deborah L. Jaques, Barton G. Selby, Julie S. Skoglund, Suzanne Kosina
Marine Ornithology
California Brown Pelicans Pelecanus occidentalis californicus rehabilitated in 2009–2019 were released with metal federal and blue plastic auxiliary leg bands. Resighting data were obtained from the US Geological Survey’s Bird Banding Laboratory, International Bird Rescue’s citizen science reporting forms, and non-breeding communal roost site surveys. Medical problems and demographic data were assessed in relation to whether birds were resighted, whether they were alive at the most recent resighting, and by longevity after release. The 1418 blue-banded individuals in the study were admitted for rehabilitation and released 1 465 times, and 49.9% were resighted at least once. At the most recent …
Characterizing The Diet Of A Threatened Seabird, The Marbled Murrelet Brachyramphus Marmoratus, Using High-Throughput Sequencing, Emily D. Fountain, Paige J. Kulzer, Richard T. Golightly, James W. Rivers, Scott F. Pearson, Martin G. Raphael, Matthew G. Betts, S. Kim Nelson, Daniel D. Roby, Nicholas F. Kryshak, Stephanie Schneider, M. Zachariah Peery
Characterizing The Diet Of A Threatened Seabird, The Marbled Murrelet Brachyramphus Marmoratus, Using High-Throughput Sequencing, Emily D. Fountain, Paige J. Kulzer, Richard T. Golightly, James W. Rivers, Scott F. Pearson, Martin G. Raphael, Matthew G. Betts, S. Kim Nelson, Daniel D. Roby, Nicholas F. Kryshak, Stephanie Schneider, M. Zachariah Peery
Marine Ornithology
Understanding prey consumption patterns is critical to understanding the ways in which seabirds cope with a changing ocean. However, characterizing the dietary habitats of seabirds can be challenging. In this study, we investigated the diet of the Marbled Murrelet Brachyramphus marmoratus population that lives in waters off California, Oregon, and Washington, USA, using fecal DNA, custom metabarcoding, and high-throughput sequencing. Murrelets were captured at sea by dip-netting at night. Across this region, murrelets consumed highly diverse prey types including 17 fish species and 10 invertebrate species, in accord with previous work indicating the species’ forage on a wide range of …
Masthead, Pacific Seabird Group
Inside Front Cover, Pacific Seabird Group
Author Instructions, Pacific Seabird Group
Reviews: Vagrancy In Birds (Lees, A., & Gilroy, J.); Audubon At Sea: The Coast And Transatlantic Adventures Of John Jame Audubon / With A Forward By Subhankar Bangerjee (Irmscher, C. & King, R.J.); New(Ish) And Noteworthy: Neptune’S Laboratory: Fantasy, Fear, And Science At Sea (Adler, A.); Down To Earth: Politics In The New Climatic Regime (Latour, B.); Birds And Us: A 12,000-Year History From Cave Art To Conservation (Birkhead, T.); Seabirds Of Southern Africa, Second Edition (Ryan, P.), Ginger A. Rebstock, Romaric Moncrieffe, Eric Wagner
Marine Ornithology
No abstract provided.
Diet Composition Of Adelie Penguins Pygoscelis Adeliae At Hope/Esperanza Bay During 2014-2019, A.M. Silvestro, R. Casaux
Diet Composition Of Adelie Penguins Pygoscelis Adeliae At Hope/Esperanza Bay During 2014-2019, A.M. Silvestro, R. Casaux
Marine Ornithology
In this study, we obtained samples through stomach lavage to determine the diet of Adelie Penguins Pygoscelis adeliae during the guard and crèche periods at Hope/Esperanza Bay, Antarctica, during four breeding seasons (2014–2019, except 2016). Antarctic krill was the dominant prey, contributing > 99.6% of the diet by mass. The remainder of prey were fish, amphipods, and mollusks. Among fish, the nototheniid Pleuragramma antarcticum was the most frequent while the bathydraconid Parachaenichthys charcoti dominated by mass. Mollusks and fish increased their contribution during the crèche period in accord with seasonal patterns elsewhere.