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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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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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Lesser Noddy Anous Tenuirostris Migration From A Non-Breeding Area In The Northern Maldives To A Breeding Site In The Seychelles, A. Farhath Ali, Richard A. Phillips, R. Charles Anderson Jul 2025

Lesser Noddy Anous Tenuirostris Migration From A Non-Breeding Area In The Northern Maldives To A Breeding Site In The Seychelles, A. Farhath Ali, Richard A. Phillips, R. Charles Anderson

Marine Ornithology

The Lesser Noddy Anous tenuirostris occurs in large numbers in the northern Maldives during the northeast monsoon season (December to April). These birds do not breed in the Maldives, but their breeding site(s) are unknown. We attached GPS Argos satellite transmitters to seven Lesser Noddies roosting on Gallandhoo Island (Haa Alifu Atoll, northern Maldives) on 25 March 2022. Only one transmitter provided data, but it tracked the migration of one Lesser Noddy to the Seychelles, where the bird first roosted on the island of Poivre before moving to the large nesting colony on Cousine. The tracked bird departed the Maldives …

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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 Jul 2025

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 …

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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 Jul 2025

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 …

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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 Jul 2025

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 …

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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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Diet Composition Of Adelie Penguins Pygoscelis Adeliae At Hope/Esperanza Bay During 2014-2019, A.M. Silvestro, R. Casaux Jul 2025

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.

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Stable Isotope-Determined Diets Of Black Oystercatchers Haematopus Bachmani In The Northern Gulf Of Alaska, Brooke Carney, David Tessler, Heather Coletti, Jeffrey M. Welker, Douglas Causey Jul 2025

Stable Isotope-Determined Diets Of Black Oystercatchers Haematopus Bachmani In The Northern Gulf Of Alaska, Brooke Carney, David Tessler, Heather Coletti, Jeffrey M. Welker, Douglas Causey

Marine Ornithology

Black Oystercatchers Haematopus bachmani (BLOY) feed on intertidal invertebrates along coasts of the northern Gulf of Alaska and elsewhere. Details of their feeding ecology have only been marginally delineated, however, and as population sizes are small and limited geographically, rapid ecological changes may alter their prey base, placing BLOY resiliency in jeopardy. We examined the diets of BLOYs occupying the coast at three sites in Southeast Alaska using stable isotope analysis of carbon (δ13C) and nitrogen (δ15N) to answer the following three questions: (1) what are the diet proportions of prey groups consumed at different locations along the northern Gulf …

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High-Contrast Banners Designed To Deter Seabirds From Gillnets Reduce Target Fish Catch, William A. Montevecchi, Jessika Lamarre, Yann Rouxel, Marina W. Montevecchi, Robert J. Blackmore, Christina Bourne, Caleb S. Spiegel Jul 2025

High-Contrast Banners Designed To Deter Seabirds From Gillnets Reduce Target Fish Catch, William A. Montevecchi, Jessika Lamarre, Yann Rouxel, Marina W. Montevecchi, Robert J. Blackmore, Christina Bourne, Caleb S. Spiegel

Marine Ornithology

The incidental catch of non-target species in fishing gear (i.e., bycatch) is a global threat to sustainability and conservation in marine systems. Seabirds experience substantial bycatch mortality, with gillnets having the greatest impacts of any fishing gear. Widespread mitigation to reduce seabird bycatch in gillnet fisheries is tenuous, and information on bycatch in inshore surface-set gillnets remains a major knowledge gap. To help address these issues, we collaborated with commercial fishers to test the efficacy of high-contrast banners designed to alert seabirds. In waters of Newfoundland, Canada, banners were attached to surface-set gillnets for Atlantic Herring Clupea harengus and were …

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Flight Altitudes Of Chick-Rearing Rhinoceros Auklets Cerorhinca Monocerata Measured By Gps Logger, Jumpei Okado, Yutaka Watanuki Jul 2025

Flight Altitudes Of Chick-Rearing Rhinoceros Auklets Cerorhinca Monocerata Measured By Gps Logger, Jumpei Okado, Yutaka Watanuki

Marine Ornithology

Alcids generally fly at low altitudes (below 5 m) over the sea but may occasionally fly higher in certain areas, which may put them at risk of collision with turbine blades in offshore wind farms. We used GPS loggers to investigate the location and altitude of flying Rhinoceros Auklets Cerorhinca monocerata. They typically flew at low altitudes averaging < 1 m but flew higher (> 20 m) when returning the last 5–10 km to their colony, which was located at an elevation of 120–130 m above sea level. Thus, the region over which Rhinoceros Auklets fly highest may vary, depending on the location and elevation of their …

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Breeding Microhabitat Patterns Among Sympatric Tropical Larids, Antonio Garcia-Quintas, Dennis Denis, Christophe Barbraud, Sophie Lanco Bertrand Jul 2025

Breeding Microhabitat Patterns Among Sympatric Tropical Larids, Antonio Garcia-Quintas, Dennis Denis, Christophe Barbraud, Sophie Lanco Bertrand

Marine Ornithology

The selection of breeding microhabitat (nesting sites) affects successful reproduction in seabirds, yet the process of nesting-site selection in sympatric tropical species remains poorly known. During the 2021 breeding season, we assessed nesting-site selection among five larid species at three cays of Cuba and quantified explanatory variables. Random forest classification models were used to assess which landscape features among eight variables best explained site selection by each species. Patterns were clear for most species, especially the highly gregarious Roseate Tern Sterna dougallii, Royal Tern Thalasseus maximus, and Sandwich Tern T. sandvicensis. Patterns were consistent among the study cays. Dominant plant …

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Increasing Use Of Artificial Nest Chambers By Seasonally Segregated Populations Of Band-Rumped Storm Petrels Hydrobates Castro At St Helena, South Atlantic Ocean, Annalea Beard, Robert J. Thomas, Elizabeth Clingham, Leeann Henry, Renata Medeiros, Steffen Oppel, Alison Small, Frank Hailer Jul 2025

Increasing Use Of Artificial Nest Chambers By Seasonally Segregated Populations Of Band-Rumped Storm Petrels Hydrobates Castro At St Helena, South Atlantic Ocean, Annalea Beard, Robert J. Thomas, Elizabeth Clingham, Leeann Henry, Renata Medeiros, Steffen Oppel, Alison Small, Frank Hailer

Marine Ornithology

Artificial nest chambers have become a common management tool for monitoring nocturnal burrow-nesting seabirds, although their utility varies among species and locations. The widespread Band-rumped Storm Petrel Hydrobates castro species complex potentially harbours a cryptic species endemic to the South Atlantic. Here we evaluate the installation of artificial nest chambers as a tool for long-term conservation and monitoring of this species, which breeds in two distinct seasons on St Helena. Based on six years of observational data, we analysed factors affecting occupancy, mate and chamber fidelity, and reproductive success to optimise nest chamber installation and to enhance future management. Occupancy …

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Demographics And Gross Pathology Of Scoters And Scaups Killed By The Cosco Busan Oil Spill In California, Jessie Beck, Ryan D. Carle, Hannahrose Nevins, Susan E.W. De La Cruz, Erica Donnelly-Greenan Jul 2025

Demographics And Gross Pathology Of Scoters And Scaups Killed By The Cosco Busan Oil Spill In California, Jessie Beck, Ryan D. Carle, Hannahrose Nevins, Susan E.W. De La Cruz, Erica Donnelly-Greenan

Marine Ornithology

Unusual wildlife mortality events provide a unique opportunity to collect information on demographics, disease, and body condition in affected wildlife, which may be useful for informing oil spill damage assessments and future spill responses. In November 2007, the Cosco Busan Oil Spill occurred in San Francisco Bay, California, a globally important wintering area for waterfowl. The spill resulted in the mortality of scoters Melanitta spp. and scaups Aythya spp., species that have declined significantly over recent decades. We examined the demography (sex and age ratios) and prevalence of grossly apparent disease (acanthocephalan parasite infection and mycotic disease) in 288 Surf …

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Apparent Survival Among Adult Leach's Storm Petrels Hydrobates Leucorhous On A Colony Managed For Predators In Nova Scotia, Canada, Sarah E. Gutowsky, Gregory J. Robertson, Anna M. Calvert, David A. Fifield, Robert A. Ronconi, Jennifer C. Rock Jul 2025

Apparent Survival Among Adult Leach's Storm Petrels Hydrobates Leucorhous On A Colony Managed For Predators In Nova Scotia, Canada, Sarah E. Gutowsky, Gregory J. Robertson, Anna M. Calvert, David A. Fifield, Robert A. Ronconi, Jennifer C. Rock

Marine Ornithology

Population declines of Leach’s Storm Petrels Hydrobates leucorhous in the western Atlantic have both led to the species’ recent assessment as Threatened in Canada and contributed to a Vulnerable designation by the IUCN. Limited information suggests low adult survival rates are an important contributing factor. Off eastern Nova Scotia, Canada, Country Island is managed for avian predators and mustelids to protect nesting endangered Roseate Terns Sterna dougallii. The island also hosts a colony of Leach’s Storm Petrels. In 2016, a capture-mark recapture program was initiated for storm petrels, from which we estimated apparent survival and recapture probabilities for 571 breeding …

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Disparate Decadal Trends In Kaua'i Seabird Populations: Possible Effects Of Resource Competition And Anthropogenic Impacts, David Ainley, Stephanie Schneider, Gregory Spencer Jul 2025

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, …

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Underwater Kleptoparasitism On A Human Diver By A Galapagos Flightless Cormorant Nannopterum Harrisi, Juan Manuel Álava-Jurado, Michael J. Kingsford, Margarita Brandt, Eric Dorfman Jul 2025

Underwater Kleptoparasitism On A Human Diver By A Galapagos Flightless Cormorant Nannopterum Harrisi, Juan Manuel Álava-Jurado, Michael J. Kingsford, Margarita Brandt, Eric Dorfman

Marine Ornithology

We describe underwater kleptoparasitism on a human diver by a Galapagos Flightless Cormorant Nannopterum harrisi, a behavior that has not been previously described for this species.

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When Ornithology Meets Ethnology And Archeology: The Birds Of The Bird-Cult At Rapa Nui (Easter Island) And Their Demise, Manuel Marín Jul 2025

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 …

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European-Asian Population Of Great White Pelican Pelecanus Onocrotalus, From Breeding To Wintering: A Review, Khashayar Mahdiany Bora, Ghazaleh Mirbazel, Mohammadjavad Tajadod Jul 2025

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 …

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The Potential Of Ecologists To Enhance Our Understanding Of Seabird Health, Melanie R. Wells, Annie Philips, Mary-Anne Lea, Scott Carver Jul 2025

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 …

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Laying Sequence And Oceanographic Factors Affect Egg Size In Scripps's Murrelets Synthliboramphus Scrippsi At Santa Barbara Island, Marcela I. Todd Zaragoza, Amelia J. Duvall, Jim A. Howard, David M. Mazurkiewicz, Sarah J. Converse Jul 2025

Laying Sequence And Oceanographic Factors Affect Egg Size In Scripps's Murrelets Synthliboramphus Scrippsi At Santa Barbara Island, Marcela I. Todd Zaragoza, Amelia J. Duvall, Jim A. Howard, David M. Mazurkiewicz, Sarah J. Converse

Marine Ornithology

Egg size is an important avian life history parameter, with larger eggs indicating greater investment of resources in the chick. Prey availability can affect such investment. We investigated the effects of oceanographic conditions and laying sequence on Scripps’s Murrelet Synthliboramphus scrippsi egg size at Santa Barbara Island, California during 2009–2017. We evaluated oceanographic covariates characterizing marine productivity for their effect on egg size, including large-scale oceanographic indices such as the Pacific Decadal Oscillation (PDO) index, Oceanic Niño Index (ONI), and North Pacific Gyre Oscillation (NPGO) index. We also evaluated a larval anchovy catch-per-unit-effort (ANCHL) index and the Biologically Effective Upwelling …

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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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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 Jul 2025

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.

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Migrational Movements And Seasonal Home Ranges Of Greater Crested Terns Thalasseus Bergii Breeding In The South China Sea, Xin Yu, Xiao Guo, Yanzhu Ji, Shiyu Tang, Chenxi Jia, Fumin Lei Jul 2025

Migrational Movements And Seasonal Home Ranges Of Greater Crested Terns Thalasseus Bergii Breeding In The South China Sea, Xin Yu, Xiao Guo, Yanzhu Ji, Shiyu Tang, Chenxi Jia, Fumin Lei

Marine Ornithology

The migratory pathways of Greater Crested Terns Thalasseus bergii in the East Asian-Australasian Flyway are poorly known. We tracked three birds by deploying GPS/GSM transmitters in September 2018, one for 23 months, one for 16 months, and one for 1.5 months. These tracks included complete fall migration routes for all three individuals and partial spring migration routes for two individuals between a breeding area in the Xisha Archipelago (South China Sea) and two wintering areas, one in the western Philippine Archipelago and the other in the western Celebes Sea. We observed that the two fully tracked terns had large seasonal …

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