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Articles 511 - 540 of 29178
Full-Text Articles in Entire DC Network
Arts & Literature: A Personal Reckoning: Taking Responsibility As A Perpetrator, Henry C. Theriault
Arts & Literature: A Personal Reckoning: Taking Responsibility As A Perpetrator, Henry C. Theriault
Genocide Studies and Prevention: An International Journal
This autobiographical essay identifies three forces that shaped the author’s participation in the scholarly and political struggle against genocide and other mass violence and oppression. These include his status as the grandson of Armenian Genocide survivors, the fact that his father was killed in action in the US War of Aggression against Vietnam, and the bullying he experienced as a child and adolescent. It then pushes back against any sense of victimhood that has resulted from the combination of these forces, to recognize the author’s implication in perpetration of the US War of Aggression against Vietnam, which the author has …
Durkheim’S Structural Functionalism And The Integration Of Genocide In His Sociological Framework, Anthonie Holslag
Durkheim’S Structural Functionalism And The Integration Of Genocide In His Sociological Framework, Anthonie Holslag
Genocide Studies and Prevention: An International Journal
No abstract provided.
Book Review: Genocide Culture: Cultural Habitus, Ethnic Engineering And Religious Doxa, Michael M. Gunter
Book Review: Genocide Culture: Cultural Habitus, Ethnic Engineering And Religious Doxa, Michael M. Gunter
Genocide Studies and Prevention: An International Journal
No abstract provided.
Opportunities For Growth: A Metacognitive Self-Talk Strategy That Improves Classroom Unity And Academic Attitudes, Sera Anello, Michael J. Haslip
Opportunities For Growth: A Metacognitive Self-Talk Strategy That Improves Classroom Unity And Academic Attitudes, Sera Anello, Michael J. Haslip
Journal of Practitioner Research
This teacher action research study describes the development and application of the opportunities for growth teaching method to increase learner motivation, persistence, cooperation and positive self-talk among primary school students. The approach was implemented with 30 fourth graders in a Philadelphia public school classroom to foster unity, support attitudes toward academics and participation, redefine failure, and reframe challenges. Before this intervention, most of the students lacked self-regulation, self-awareness, and relationship skills needed to thrive. This study investigates how and to what effect the opportunities for growth approach shifts students’ language and mindset about academic and social challenges. Qualitative data was …
Teaching Ai Ethics And Skepticism: The Impact Of Instruction On Ethical Usage On Students’ Perceptions, Jenna D. Justin
Teaching Ai Ethics And Skepticism: The Impact Of Instruction On Ethical Usage On Students’ Perceptions, Jenna D. Justin
Journal of Practitioner Research
This study investigates the ethical implications of artificial intelligence (AI) in K-12 education, focusing on how explicit instruction influences students' perceptions of AI tools like ChatGPT. Conducted with 80 sixth-grade students at A.D. Henderson University School and FAU High School, the research tracks changes in student understanding and skepticism of AI following a World History unit. Pre- and post-instruction surveys revealed a decline in comfort with AI as students became more aware of its ethical concerns, including plagiarism, bias, and misinformation. The findings suggest integrating AI ethics into the middle school curriculum to foster responsible AI usage among students.
Expanding The Role Of Embodiment And Teacher Noticing In Units Coordination And Construction, Claudia Bertolone-Smith, Jonathan Troup, Liza Bondurant, Diana Moss, Hortensia Soto
Expanding The Role Of Embodiment And Teacher Noticing In Units Coordination And Construction, Claudia Bertolone-Smith, Jonathan Troup, Liza Bondurant, Diana Moss, Hortensia Soto
Journal of Practitioner Research
We aim to expand units coordination and construction assessment by examining the significance of embodiment and teacher noticing, especially in relation to recent developments in equitable mathematics teacher noticing research. We outline our approach as mathematics teacher educators with a wide range of expertise, wherein we investigated how prospective elementary mathematics teachers (PTs) notice students' units construction and coordination through embodied actions and the impact of incorporating a focus on embodiment in assessment. We also address how expanding the understanding of units coordination and construction assessment through embodied noticings can create more equitable classroom spaces. The study emphasizes the need …
Reviews: Conservation Of Marine Birds (Young, L. & Vanderwerf, E.); Science, Secrecy And The Smithsonian: The Strange History Of The Pacific Ocean Biological Survey Program (Regis, E.); New(Ish) And Noteworthy: Seabirds Count: A Census Of Breeding Seabirds In Britain And Ireland (Burnell, D., Perkins, A.J., Newton, S.F., Bolton, M., Tierney, T.D., Dunn, T.E.); Sea Change: An Atlas Of Islands In A Rising Ocean (Gerhardt, C.); Bird Day: A Story Of 24 Hours And 24 Avian Lives (Hauber, M.E.); Journeys With Emperors: Tracking The World’S Most Extreme Penguin (Kooyman, G.L. & Mastro, J.), Mark J. Rauzon, Eric Wagner
Marine Ornithology
No abstract provided.
Establishment Of An Incipient Newell’S Shearwater Puffinus Newelli Colony On Maui, Gregory Spencer, Mitchell Craig, Brad Yuen, David Ainley
Establishment Of An Incipient Newell’S Shearwater Puffinus Newelli Colony On Maui, Gregory Spencer, Mitchell Craig, Brad Yuen, David Ainley
Marine Ornithology
We report the development of a colony of threatened Newell’s Shearwater Puffinus newelli (NESH) at Makamaka‘ole, West Maui, USA, a successful first undertaking in the Hawaiian Islands. Efforts involved the construction of two predator-proof fenced areas, removal/control of predators, placement of nest boxes, and social attraction using recorded calls and decoys. Initially, one of the management areas was intended for Hawaiian Petrel Pterodroma sandwichensis (HAPE) and the other for NESH. Exclosures were completed and mammalian predators were removed in 2013, and social attraction began in 2014. Both species almost immediately began flyovers to inspect speakers and by 2015, they had …
A 31-Year Time Series Of At-Sea Counts Shows A Non-Significant Decline Of Marbled Murrelets At Laskeek Bay, Haida Gwaii, 1990–2020, Vivian Pattison, Douglas F. Bertram, Sonya A. Pastran, Anthony J. Gaston, Rian D. Dickson, Mark C. Drever
A 31-Year Time Series Of At-Sea Counts Shows A Non-Significant Decline Of Marbled Murrelets At Laskeek Bay, Haida Gwaii, 1990–2020, Vivian Pattison, Douglas F. Bertram, Sonya A. Pastran, Anthony J. Gaston, Rian D. Dickson, Mark C. Drever
Marine Ornithology
The Marbled Murrelet Brachyramphus marmoratus breeds and overwinters along the coast of British Columbia, Canada, and is listed as Threatened under the Canadian Species at Risk Act. Understanding population trends for this seabird species is important for management and recovery, yet long-term time-series data for Marbled Murrelet abundance are rare. We update trends and annual fluctuations of Marbled Murrelet numbers derived from at-sea counts in Laskeek Bay, Haida Gwaii, on the north coast of British Columbia, 1990–2020. We found a non-significant negative trend (−1.55% per year). Counts varied seasonally and peaked in early June; counts also varied with distance from …
Predator Disturbance Contributed To Common Murre Uria Aalge Breeding Failures In Cook Inlet, Alaska Following The 2014–2016 Pacific Marine Heatwave, Caitlin E. Marsteller, Mayumi L. Arimitsu, Sarah K. Schoen, Samuel B. Stark, John F. Piatt
Predator Disturbance Contributed To Common Murre Uria Aalge Breeding Failures In Cook Inlet, Alaska Following The 2014–2016 Pacific Marine Heatwave, Caitlin E. Marsteller, Mayumi L. Arimitsu, Sarah K. Schoen, Samuel B. Stark, John F. Piatt
Marine Ornithology
The 2014–2016 Pacific marine heatwave caused unprecedented die-offs and multi-year reproductive failures for Common Murres Uria aalge along the west coast of North America. Lingering impacts, such as declines in colony attendance and productivity, have persisted at some colonies following the heatwave and are attributed largely to changes in prey availability and quality. Here, we present evidence of an additional, top-down mechanism contributing to Common Murre breeding failures on Gull Island (Alaska): disturbance of nesting birds by aerial predators and associated egg depredation. We collected time-lapse images over five murre breeding seasons (2016–2020) on Gull Island to document the frequency, …
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
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 …
Masthead, Pacific Seabird Group
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 …
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.
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 …
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
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.
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
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 …
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
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 …
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 …
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
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 …
Masthead, Pacific Seabird Group
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 …
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 …