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Articles 158641 - 158670 of 5154127

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Breeding Population Size Of The Pink-Footed Shearwater Ardenna Creatopus On Isla Mocha, Chile, Ryan D. Carle, Tiare Varela, Valentina Colodro, T.J. Clark-Wolf, Jonathan Felis, Peter Hodum, Francisco Javier Astete Castillo, Verónica López Jul 2025

Breeding Population Size Of The Pink-Footed Shearwater Ardenna Creatopus On Isla Mocha, Chile, Ryan D. Carle, Tiare Varela, Valentina Colodro, T.J. Clark-Wolf, Jonathan Felis, Peter Hodum, Francisco Javier Astete Castillo, Verónica López

Marine Ornithology

Species population estimates are a fundamental component of conservation planning, but there are deficiencies in reliable data for many seabirds. The Pink-footed Shearwater Ardenna creatopus is a seabird that breeds on three islands worldwide, with the largest population on Isla Mocha, Chile. We aimed to update the breeding population estimate of Pink-footed Shearwaters on Isla Mocha, comparing results from design- and model-based estimation methods. We counted shearwater burrows in 220 randomly generated five-meter-radius plots across pre-defined strata on Isla Mocha. We estimated total number of burrows using area-based extrapolation (design-based method), and separately using a model predicting burrow density based …

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Status And Occurrence Of Wedge-Tailed Shearwater Ardenna Pacifica In Waters Of The Northwestern Coast Of South America, Manuel Marín Jul 2025

Status And Occurrence Of Wedge-Tailed Shearwater Ardenna Pacifica In Waters Of The Northwestern Coast Of South America, Manuel Marín

Marine Ornithology

This study examines the distribution of Wedge-tailed Shearwater Ardenna pacifica along the northwest coast of South America. The species is well known in tropical waters distant from the coast, but it also appears to be a regular visitor to shelf-break waters off Colombia and northern Ecuador; there is no evidence indicating a similar presence within the exclusive economic zone (EEZ) of Peru, where waters are colder. About 50% of Wedge-tailed Shearwater sightings are associated with dolphins and/or large fish. More than 90% of the nearshore South American records are of pale-phase individuals.

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Tracked Gulls Help Identify Potential Zones Of Interaction Between Whales And Shipping Traffic, Megan A. Cimino, Heather Welch, Jarrod A. Santora, David Kroodsma, Elliott L. Hazen, Steven J. Bograd, Pete Warzybok, Jaime Jahncke, Scott A. Shaffer Jul 2025

Tracked Gulls Help Identify Potential Zones Of Interaction Between Whales And Shipping Traffic, Megan A. Cimino, Heather Welch, Jarrod A. Santora, David Kroodsma, Elliott L. Hazen, Steven J. Bograd, Pete Warzybok, Jaime Jahncke, Scott A. Shaffer

Marine Ornithology

Seabird-vessel interactions are often studied through the lens of fisheries bycatch, but seabirds encounter many watercraft types. Western Gulls Larus occidentalis breeding on the Farallon Islands (California, USA) have a foraging domain that encompasses both shipping lanes and productive fishing grounds, resulting in ample opportunities for vessel encounters. Previous research showed that these Western Gulls can serve as ecosystem indicators because their foraging behavior is linked to ocean prey conditions, and because their foraging grounds overlap with that of Humpback Whales Megaptera novaeangliae, which can make prey accessible. Because ship strikes and entanglement in fishing gear are concerns for whales …

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Effects Of A Vagrant Arctic Fox Alopex Lagopus On An Isolated Newfoundland Seabird Community, Raul Zabala Belenguer, Amy C. Wilson, Katja H. Kochvar, Sabina I. Wilhelm, Pierre-Paul Bitton Jul 2025

Effects Of A Vagrant Arctic Fox Alopex Lagopus On An Isolated Newfoundland Seabird Community, Raul Zabala Belenguer, Amy C. Wilson, Katja H. Kochvar, Sabina I. Wilhelm, Pierre-Paul Bitton

Marine Ornithology

We report predation by an Arctic Fox Alopex lagopus on two seabird species, Atlantic Puffins Fratercula arctica and Leach’s Storm Petrels Hydrobates leucorhous, nesting on Bakeapple Island, Little Fogo Islands, Newfoundland, Canada. This event took place in 2022, when a whole-island inspection revealed that fox, facilitated by over-ice invasion, killed at least 139 adult storm petrels and 8 puffin chicks. The fox also dug out 83 storm petrel and 4 puffin burrows. Breeding by seabirds on the island, which harbours some of the northernmost colonies in Newfoundland, was also largely disrupted; we documented extremely low egg and chick production values …

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Intra-Annual Shifts In Atlantic Puffin Fratercula Arctica Depredation And Kleptoparasitism By Larus Gulls At A Multi-Species Seabird Colony, Gibson M. Rieger, Gail K. Davoren Jul 2025

Intra-Annual Shifts In Atlantic Puffin Fratercula Arctica Depredation And Kleptoparasitism By Larus Gulls At A Multi-Species Seabird Colony, Gibson M. Rieger, Gail K. Davoren

Marine Ornithology

Great Black-backed Gulls Larus marinus and American Herring Gulls L. argentatus smithsonianus are considered dietary generalists at the population level: they consume a variety of prey types, including the adults and offspring of other seabirds, and they shift among prey types as availability varies. Atlantic Puffin Fratercula arctica adults, eggs, and chicks are often the target of depredation, and adults are also susceptible to kleptoparasitic attacks by large gulls during their summer breeding season in coastal Newfoundland, Canada. We investigated the depredation and kleptoparasitism of puffins by large gulls during July–August 2021/22 at a multi-species breeding colony on the northeast …

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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 Jul 2025

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 …

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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 Jul 2025

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 …

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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 Jul 2025

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 …

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Discovery Of A New Breeding Site For The Endangered Japanese Murrelet Synthliboramphus Wumizusume In Nagasaki, Japan, Noriyuki M. Yamaguchi, Takayasu Amano, Tomomi Kimura, Ryu-Ichi Mine, Emi Yamaguchi, Toru Nakahara Jul 2025

Discovery Of A New Breeding Site For The Endangered Japanese Murrelet Synthliboramphus Wumizusume In Nagasaki, Japan, Noriyuki M. Yamaguchi, Takayasu Amano, Tomomi Kimura, Ryu-Ichi Mine, Emi Yamaguchi, Toru Nakahara

Marine Ornithology

We report a breeding site for the Japanese Murrelet Synthliboramphus wumizusume discovered for the first time in March 2023 on Hahakojima (Hakoshima), a small island in Nagasaki City, Nagasaki Prefecture, off Kyushu, Japan. We counted 129 Japanese Murrelets among at-sea congregations during spotlight surveys around Hahakojima. This provided strong evidence that murrelets were breeding on the island. During a brief search of Hahakojima, we discovered 18 nests in rock crevices. Seven of these nests included incubating adults and 11 nests contained unattended eggs. We also found 22 broken eggs in open areas and observed a Large-billed Crow Corvus macrorhynchos carrying …

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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 Jul 2025

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 …

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First Record Of Pincoya Storm Petrel Oceanites Pincoyae From Africa, With Implications For The Taxonomy And Ecology Of Oceanites Storm Petrels., Gabriel A. Jamie, Niall T. Keogh Jul 2025

First Record Of Pincoya Storm Petrel Oceanites Pincoyae From Africa, With Implications For The Taxonomy And Ecology Of Oceanites Storm Petrels., Gabriel A. Jamie, Niall T. Keogh

Marine Ornithology

On 16 May 2021, a storm petrel was photographed on a pelagic trip in the Benguela Current off Cape Town, South Africa, exhibiting the diagnostic features of Pincoya Storm Petrel Oceanites pincoyae. This sighting occurred far from other records, the closest being approximately 7500 km away. The record, therefore, requires us to reassess our understanding of the movements and ecology of Pincoya Storm Petrel, which was previously known only from shallow waters in fjords and adjacent seas in south-central Chile. Pincoya Storm Petrel is considered Data Deficient by the International Union for Conservation of Nature (IUCN), the breeding range remains …

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Masthead, Pacific Seabird Group Jul 2025

Masthead, Pacific Seabird Group

Marine Ornithology

No abstract provided.

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Inside Front Cover, Pacific Seabird Group Jul 2025

Inside Front Cover, Pacific Seabird Group

Marine Ornithology

No abstract provided.

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Contents, Pacific Seabird Group Jul 2025

Contents, Pacific Seabird Group

Marine Ornithology

No abstract provided.

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Front Cover, Pacific Seabird Group Jul 2025

Front Cover, Pacific Seabird Group

Marine Ornithology

No abstract provided.

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Reviews: Chasing The Sun (Musso, T.); New(Ish) And Noteworthy: Ocean Bestiary: Meeting Marine Life From Abalone To Orca To Zooplankton (King, R.J.); Flight Paths: How A Passionate And Quirky Group Of Pioneering Scientists Solved The Mystery Of Bird Migration (Heisman, R.); Nonviolent Communication: A Language Of Life, 3rd Edition (Rosenberg, M. B.); The Home Place: Memoirs Of A Colored Man's Love Affair With Nature (Lanham, J.D.), David C. Duffy, Eric Wagner Jul 2025

Reviews: Chasing The Sun (Musso, T.); New(Ish) And Noteworthy: Ocean Bestiary: Meeting Marine Life From Abalone To Orca To Zooplankton (King, R.J.); Flight Paths: How A Passionate And Quirky Group Of Pioneering Scientists Solved The Mystery Of Bird Migration (Heisman, R.); Nonviolent Communication: A Language Of Life, 3rd Edition (Rosenberg, M. B.); The Home Place: Memoirs Of A Colored Man's Love Affair With Nature (Lanham, J.D.), David C. Duffy, Eric Wagner

Marine Ornithology

No abstract provided.

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Author Instructions, Pacific Seabird Group Jul 2025

Author Instructions, Pacific Seabird Group

Marine Ornithology

No abstract provided.

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A Systematic Review Of Trends In Research On Seabird Behavioral Flexibility, M. Candelaria Biagiotti Barchiesi, Laura M. Biondi, German O. García Jul 2025

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 …

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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 Jul 2025

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 …

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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 Jul 2025

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 …

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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 Jul 2025

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.

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A Modest Proposal-Seabirds Are Marine Creatures First, Land-Based Marine Predators Second, David Ainley, Michael Johns Jul 2025

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 …

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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 Jul 2025

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.

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Long-Term Dynamics Of Seabird Species Composition Across The Drake Passage, Ihor V. Dykyy, Olexander O. Salganskiy, Anatolii P. Chernov, Vladlen M. Trokhymets Jul 2025

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.

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Estimating The Impact Of Marine Threats To Seabird Recovery After Predator Eradication, Stephanie B. Borrelle, Holly P. Jones, Yvan Richard, Roberto Salguero-Gómez Jul 2025

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 …

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Interactions Between Seabirds And Sharks At A Fur Seal Carcass, Simon B.Z. Gorta, Brittany Brockett, Shoshana Rapley Jul 2025

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 …

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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 Jul 2025

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 …

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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 Jul 2025

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 …

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Ingestion Of Man-Made Debris By Markham's Storm Petrel Hydrobates Markhami, Fernando Medrano, Macarena Vargas, Daniel Terán, Marlene Flores, Giannira Álvarez, Ronny Peredo Jul 2025

Ingestion Of Man-Made Debris By Markham's Storm Petrel Hydrobates Markhami, Fernando Medrano, Macarena Vargas, Daniel Terán, Marlene Flores, Giannira Álvarez, Ronny Peredo

Marine Ornithology

Man-made debris is a global problem for seabirds because it is ingested by many species. Markham’s Storm Petrel Hydrobates markhami, which breeds in the Atacama Desert and is endemic to the Humboldt Current in the eastern South Pacific, has been poorly studied in this regard. Earlier studies found low levels of man-made debris in the species’ diet. We quantified the present-day frequency-occurrence of man-made debris in fledglings and adults of Markham’s Storm Petrel in Chile. We found that 16 of 25 fledglings and all adults contained man-made debris in their digestive tract, indicating the prevalence of man-made debris in this …

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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 Jul 2025

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 …

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