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Thick-Billed Murres Uria Lomvia At Cape Parry, Northwest Territories: Core-Use Areas, Morphometrics And Chick Diets, Rosana Paredes, Stephen, J. Insley, Sebastian Luque, Piia Kortsalo Jul 2025

Thick-Billed Murres Uria Lomvia At Cape Parry, Northwest Territories: Core-Use Areas, Morphometrics And Chick Diets, Rosana Paredes, Stephen, J. Insley, Sebastian Luque, Piia Kortsalo

Marine Ornithology

Cape Parry is home to the only colony of Thick-billed Murres Uria lomvia in the western Canadian Arctic, but ecological information for this small, isolated population is lacking. To address this information gap, we investigated the spatial distribution, diving behaviour, diet, and morphometrics of male and female Cape Parry Thick-billed Murres during the breeding season. We tracked 23 chick-rearing adults (seven females and 16 males) using Global Positioning System (GPS) tags with depth sensors (2021) and collected chick diet data (2021, 2022) using observations and photos. Cape Parry murres foraged relatively close to the colony (4.5 ± 3.3 km) and …


Seagrass And Mangroves As Water-Associated Bird Habitat In The Southern Red Sea Coasts Of Saudi Arabia, Jeff Bogart R. Abrogueña, Iwao Tanita, Anthony M. Doyle, Romana Roje-Busatto, Jean Rose H. Maquirang, Seerangan Manokaran, Khalid Imam, Thamer Al-Johani, Sau Pinn Woo Jul 2025

Seagrass And Mangroves As Water-Associated Bird Habitat In The Southern Red Sea Coasts Of Saudi Arabia, Jeff Bogart R. Abrogueña, Iwao Tanita, Anthony M. Doyle, Romana Roje-Busatto, Jean Rose H. Maquirang, Seerangan Manokaran, Khalid Imam, Thamer Al-Johani, Sau Pinn Woo

Marine Ornithology

Studies on water-associated bird communities within seagrass and mangrove habitats, especially in arid environments, are limited. Here, we studied a pristine mangrove forest with associated seagrass meadows in the Jazan City for Primary and Downstream Industries (JCPDI) on the southern Red Sea coast of Saudi Arabia. Our objectives were to (1) determine the differences in the diversity and distribution of water-associated bird communities between three sampling stations—S1 (a mixture of mangroves and seagrass beds), S2 (an open coast adjacent to mangroves), and S3 (an open coast without vegetation)—and across three seasons (March for spring, July for summer, and November for …


Wire Ingestion By A Red-Billed Tropicbird Phaethon Aethereus Chick On San Pedro Mártir Island, Mexico, Alberto Piña-Ortiz, Vladislav Marcuk, Salvador Gómez-Hernández, José Alfredo Castillo-Guerrero, Petra Quillfeldt Jul 2025

Wire Ingestion By A Red-Billed Tropicbird Phaethon Aethereus Chick On San Pedro Mártir Island, Mexico, Alberto Piña-Ortiz, Vladislav Marcuk, Salvador Gómez-Hernández, José Alfredo Castillo-Guerrero, Petra Quillfeldt

Marine Ornithology

We report the ingestion of wire by a Red-billed Tropicbird Phaethon aethereus chick at San Pedro Mártir Island, Gulf of California, Mexico. A scat sample collected from a four- to five-week-old chick contained a copper wire ~5.0 mm in length. Biologging revealed the previous foraging trips by one of the parents, and we ascertained the diet of birds in this colony through a molecular approach. From these data, we suggest why this individual was fed wire.


The Owl Gull: Exclusively Nocturnal Foraging By The Swallow-Tailed Gull Creagrus Furcatus In Galápagos, Sebastian M. Cruz, Luke R. Halpin, Carolina Proaño, David J. Anderson, Martin Wikelski Jul 2025

The Owl Gull: Exclusively Nocturnal Foraging By The Swallow-Tailed Gull Creagrus Furcatus In Galápagos, Sebastian M. Cruz, Luke R. Halpin, Carolina Proaño, David J. Anderson, Martin Wikelski

Marine Ornithology

Colony-based observations indicate that Swallow-tailed Gulls Creagrus furcatus go to sea only at night. Here, we use GPS tracking technology to reveal the species’ exclusively nocturnal foraging behavior at four colonies in the Galápagos Islands. All nocturnal trips proved to be foraging effort in pelagic waters 19–103 km from nests during breeding. While at sea, individuals spent approximately one-quarter of their time commuting, with half of the time dedicated to area-restricted search behavior. Three years of data from one colony indicate spatial fidelity to a general foraging area. Our research directly confirms that Swallow-tailed Gulls are the only obligate nocturnal …


Artificial Brood Parasite Technique For Rearing Abandoned Eggs Of The Endangered Little Tern Sternula Albifrons, Masaharu Hayakawa Jul 2025

Artificial Brood Parasite Technique For Rearing Abandoned Eggs Of The Endangered Little Tern Sternula Albifrons, Masaharu Hayakawa

Marine Ornithology

The Little Tern Sternula albifrons is a ground-nesting species classified as Endangered on the Japan Ministry of the Environment's Red Data List. It may abandon its eggs owing to disturbances, a factor having a negative impact on its population trends. Successful artificial nurturing of these eggs could aid in the recovery of the species. To address this issue, I developed a ‘brood parasite' technique. The process involves taking abandoned eggs from a nest, incubating them in a facility until one day before hatching, and then covertly placing the protected eggs into other nests within the colony. By these means, foster …


Masthead, Pacific Seabird Group Jul 2025

Masthead, Pacific Seabird Group

Marine Ornithology

No abstract provided.


Author Instructions, Pacific Seabird Group Jul 2025

Author Instructions, Pacific Seabird Group

Marine Ornithology

No abstract provided.


Have Rodents Impacted The Breeding And Distribution Of Black Noddy Anous Minutus On Lord Howe Island?, Nicholas Carlile, Lisa O’Neill, Terence O’Dwyer Jul 2025

Have Rodents Impacted The Breeding And Distribution Of Black Noddy Anous Minutus On Lord Howe Island?, Nicholas Carlile, Lisa O’Neill, Terence O’Dwyer

Marine Ornithology

Rodents are well known to impact nesting seabirds. However, not all seabird species are equally susceptible to rodents due to variations in size, nest-site selection, or nesting behaviour. The Black Noddy Anous minutus, a common tropical, tree-nesting species, began colonisation of North Bay on Australia’s Lord Howe Island in 1989, 70 years after the establishment of Black Rats Rattus rattus. In 2014, when the breeding colony consisted of 560 pairs, we commenced a pilot study to assess impacts of rodents. Ten motion-triggered cameras monitoring 12 nests showed no rodent presence on any branches within view; 11 of those nesting attempts …


Seasonal And Spatial Variations In Densities Of Marbled Murrelets Brachyramphus Marmoratus Off Southwestern Vancouver Island, Alan E. Burger, E. Anne Stewart Jul 2025

Seasonal And Spatial Variations In Densities Of Marbled Murrelets Brachyramphus Marmoratus Off Southwestern Vancouver Island, Alan E. Burger, E. Anne Stewart

Marine Ornithology

The ocean off Vancouver Island, British Columbia, is a productive area supporting diverse marine life, including a globally important breeding population of Marbled Murrelets Brachyramphus marmoratus. We report on the year-round at-sea distribution and densities of this murrelet off southwestern Vancouver Island based on monthly vessel surveys in 1993–2000. Surveys covered three ocean zones: Nearshore (sheltered waters, usually < 20 m deep, within 1–2 km of shore; 69 surveys), Inshore (exposed coastal waters, < 50 m deep, within 6 km of shore; 38 surveys), and Offshore (exposed open seas over the continental shelf, > 50 m deep, generally > 6 km from shore; 29 surveys). Year-round mean densities (± standard deviation, in birds/km2) for Nearshore, Inshore, and Offshore waters were 4.5 ± 5.8, 1.5 ± 1.2, and 0.2 ± 0.2, respectively. During peak breeding season (May–July), densities …


No Evidence For High Pathogenicity Avian Influenza In Waved Albatross Phoebastria Irrorata, Gustavo Jiménez-Uzcátegui, Alberto Vélez, Patricio Vega, Verónica Buendia, Verónica Montenegro-Benalcázar, Christian Sevilla, Marilyn Cruz Jul 2025

No Evidence For High Pathogenicity Avian Influenza In Waved Albatross Phoebastria Irrorata, Gustavo Jiménez-Uzcátegui, Alberto Vélez, Patricio Vega, Verónica Buendia, Verónica Montenegro-Benalcázar, Christian Sevilla, Marilyn Cruz

Marine Ornithology

Highly pathogenic avian influenza (HPAI) is caused by the Alphainfluenzavirus influenzae species (type A, subtype H5N1), which has been detected in mammals (including humans) and marine birds in the Americas, including the Galápagos Islands. The Waved Albatross Phoebastria irrorata is a marine endemic species of Ecuador. Most of its breeding population nests on Española Island in the Galápagos Archipelago, and it forages at sea in the eastern South Pacific. This marine bird shares its feeding areas with the Peruvian Pelican Pelecanus thagus, Peruvian Booby Sula variegata, Guanay Cormorant Leucocarbo bougainvillii, Humboldt Penguin Spheniscus humboldti, Sanderling Calidris alba, Belcher’s Gull Larus …


Mixed Metrics And The Need To Adjust Remote-Sensing Data In The Evaluation Of Key Biodiversity Areas For Colonial-Nesting Seabirds: An Example With Glaucous-Winged Gulls Larus Glaucescens, Michael S. Rodway, Douglas F. Bertram, Lindsay A.R. Lalach Jul 2025

Mixed Metrics And The Need To Adjust Remote-Sensing Data In The Evaluation Of Key Biodiversity Areas For Colonial-Nesting Seabirds: An Example With Glaucous-Winged Gulls Larus Glaucescens, Michael S. Rodway, Douglas F. Bertram, Lindsay A.R. Lalach

Marine Ornithology

Conservation initiatives such as the Key Biodiversity Areas (KBA) Programme use standardized criteria based on estimates of species abundance to identify critical habitats. They therefore depend on accurate estimates of population sizes for target species. It is essential that the metrics used to measure abundance at a candidate site are consistent with those used to estimate total abundance at national or global scales, because only then can it be determined whether abundance at a site meets threshold criteria. Imagery gathered by remotely piloted aircraft systems (RPAS, or drones) has rapidly become a tool for determining abundance of surface-nesting seabirds and, …


Assessing The Short- And Long-Term Response Of Gulls To Non-Lethal Hazing On An Offshore Island, Pete Warzybok, Nadav Nur, Russell W. Bradley, Dan Grout, Gerard J. Mcchesney Jul 2025

Assessing The Short- And Long-Term Response Of Gulls To Non-Lethal Hazing On An Offshore Island, Pete Warzybok, Nadav Nur, Russell W. Bradley, Dan Grout, Gerard J. Mcchesney

Marine Ornithology

Non-lethal bird hazing techniques are commonly used to protect public health and safety, defend crops, and safeguard the birds themselves. Examples of their use include warding them away from airports, landfills, oil spills, and other avian toxic exposure situations. Herein we examine the efficacy of non-lethal hazing tools for minimizing impacts to Gulls Larus spp. prior to a proposed eradication of introduced House Mice Mus musculus at the South Farallon Islands, 30 km offshore of the Central California coast. Methods considered for removing mice include the aerial application of rodenticide, which poses an adverse risk to non-target wildlife, including Western …


Dynamics Of Humboldt Penguin Colonization On Port Terminal Infrastructure In Southern Peru, Carlos Zavalaga, Sebastián Lozano-Sanllehi, Ximena Velez-Zuazo, Bruno Vildoso Jul 2025

Dynamics Of Humboldt Penguin Colonization On Port Terminal Infrastructure In Southern Peru, Carlos Zavalaga, Sebastián Lozano-Sanllehi, Ximena Velez-Zuazo, Bruno Vildoso

Marine Ornithology

The use of artificial structures by seabirds is a globally recognized phenomenon driven by escalating human coastal development. Designed as maritime infrastructure, breakwaters, jetties, and bridges inadvertently offer nesting habitat and refuge for a diverse assemblage of seabird species. The construction of a detached breakwater at the port terminal of the PERU LNG natural gas liquefaction plant in Melchorita, Peru, provided a unique opportunity to observe seabird colonization of new habitat, in this case colonization by Humboldt Penguins Spheniscus humboldti from 2008 to 2024. The penguins founded a permanent breeding site within 3.5 years after cessation of human activity at …


Variation In The Heartbeat Of The White Tern Gygis Alba During Incubation, Antony W. Diamond, Adelheid Studer-Thiersch Jul 2025

Variation In The Heartbeat Of The White Tern Gygis Alba During Incubation, Antony W. Diamond, Adelheid Studer-Thiersch

Marine Ornithology

Rapid global heating is a particular danger to tropical birds already near their thermal maximum. White Terns Gygis alba are important to tourism in the Seychelles Islands, where, in 1974, we took an unexpected opportunity to measure the heart rate of two incubating adults. We found that the birds had higher heart rates at night compared to during the day, and their heart rates increased rapidly when approached by people. Local temperatures have risen considerably since these data were collected nearly 50 years ago and are predicted to rise even further by 2100. Given the importance of White Terns as …


Updated Distribution And Population Dynamics Of Magellanic Penguin Spheniscus Magellanicus Colonies In The Strait Of Magellan, Chile, Manuel Ochoa-Sánchez, Jorge Acevedo, Claudio Moraga, Katherine Gaete, Pedro Valenzuela, Valeria Souza, Eliana Paola Acuña Gomez Jul 2025

Updated Distribution And Population Dynamics Of Magellanic Penguin Spheniscus Magellanicus Colonies In The Strait Of Magellan, Chile, Manuel Ochoa-Sánchez, Jorge Acevedo, Claudio Moraga, Katherine Gaete, Pedro Valenzuela, Valeria Souza, Eliana Paola Acuña Gomez

Marine Ornithology

The Magellanic Penguin Spheniscus magellanicus exhibits a broad latitudinal distribution in southern South America. However, the locations of many breeding colonies remain poorly known on the Pacific side, particularly in the southernmost region. Here, we provide information for six Magellanic Penguin colonies in the Strait of Magellan and adjacent waters that have been known by the local community for years but were unknown in the scientific literature until now: Rupert Islet, Tuckers Islet 1, Tuckers Islet 2, James Island 1, James Island 2, and Monmouth Island. These locations differ in population size and in vegetation coverage: most colonies are characterized …


Characterizing Diet Of The Least Tern Sternula Antillarum Using Dna Metabarcoding, Viktoria E. Bogantes, Abigail J. Darrah, Molly Folkerts Caldwell, Amy K. Fellgren, Justine M. Whitaker, Alexis M. Janosik Jul 2025

Characterizing Diet Of The Least Tern Sternula Antillarum Using Dna Metabarcoding, Viktoria E. Bogantes, Abigail J. Darrah, Molly Folkerts Caldwell, Amy K. Fellgren, Justine M. Whitaker, Alexis M. Janosik

Marine Ornithology

A complete picture of diet composition is an essential element to understanding the ecological role of organisms. Moreover, diet studies can serve as an important tool for monitoring species and changes to the food web. One method to provide resolution when studying the diet of avian species is DNA metabarcoding of fecal samples. As such, we used DNA analysis to determine the diet of the Least Tern Sternula antillarum and compare results with diet analysis based on composition of fish dropped within breeding colonies. Comparisons between adult and chick fecal samples were also made across three years and within three …


Black Oystercatcher Haematopus Bachmani Productivity In California And Oregon And The Effects Of Nest Site And Environmental Covariates, Anna Weinstein, Joseph Liebezeit, Daniel Orr, Ryan D. Carle, Timothy D. Meehan Jul 2025

Black Oystercatcher Haematopus Bachmani Productivity In California And Oregon And The Effects Of Nest Site And Environmental Covariates, Anna Weinstein, Joseph Liebezeit, Daniel Orr, Ryan D. Carle, Timothy D. Meehan

Marine Ornithology

Black Oystercatcher Haematopus bachmani is a species of conservation concern due to its small global population, reliance on somewhat restricted intertidal habitat, and vulnerability to climate change impacts. Concern for this species, along with a lack of demographic information from the southern portion of its range, gave rise to a community science project to monitor pair productivity, nest characteristics, and nest disturbance from 2012 through 2022 across three study regions in Oregon and California. A clear spatial gradient existed in productivity, with relatively low values in the southern region (0.37 fledged young per pair per year, 95% confidence interval [CI] …


Long-Term Outcomes Of A Laysan Albatross Phoebastria Immutabilis Foster Egg Translocation Program, Eric A. Vanderwerf, Lindsay C. Young, C. Robert Kohley, Jessica Behnke, Brooke Mcfarland, Katherine Finney, Hob Osterlund, Julie Murphy, Angela Serota, Louise Barnfield, Yuka Green, Kim S. Rogers, Cathy Granholm Jul 2025

Long-Term Outcomes Of A Laysan Albatross Phoebastria Immutabilis Foster Egg Translocation Program, Eric A. Vanderwerf, Lindsay C. Young, C. Robert Kohley, Jessica Behnke, Brooke Mcfarland, Katherine Finney, Hob Osterlund, Julie Murphy, Angela Serota, Louise Barnfield, Yuka Green, Kim S. Rogers, Cathy Granholm

Marine Ornithology

In the 1960s and 1970s, Laysan Albatrosses Phoebastria immutabilis colonized several sites in the Pacific from which they had been extirpated or had not been known to nest previously, including the US Navy’s Pacific Missile Range Facility (PMRF) on Kaua‘i, Hawai‘i, USA, where they increased to become a bird aircraft strike hazard (BASH). To reduce their population at PMRF, albatross eggs were destroyed or removed as part of a BASH reduction program until 2005, when an alternate plan was devised by the Navy, US Fish and Wildlife Service, and US Department of Agriculture Wildlife Services, in which eggs from PMRF …


Assessment Of Tufted Puffin Fratercula Cirrhata Diet Using Dna Metabarcoding, Thomas P. Good, Andrew O. Shelton, Abigail H. Wells, Ana Ramón-Laca, Ramon Gallego, Peter J. Hodum, Scott F. Pearson Jul 2025

Assessment Of Tufted Puffin Fratercula Cirrhata Diet Using Dna Metabarcoding, Thomas P. Good, Andrew O. Shelton, Abigail H. Wells, Ana Ramón-Laca, Ramon Gallego, Peter J. Hodum, Scott F. Pearson

Marine Ornithology

Investigating trophic relationships can be critical for understanding relationships between marine predators and their prey. DNA analysis of feces is used increasingly as a non-invasive method to uncover seabird dietary patterns across space and time. Tufted Puffins Fratercula cirrhata are listed as Endangered in the state of Washington (WA), USA, and reduced prey availability is thought to be a key factor in the species’ decline. Recent information on Tufted Puffin diet is lacking, and present opportunities for direct diet observation are limited. We conducted a pilot study to characterize Tufted Puffin diet on Destruction Island, WA, in 2019 using DNA …


Oviposition Lag In Nazca Boobies Sula Granti, Leslie D. Clifford, David J. Anderson Jul 2025

Oviposition Lag In Nazca Boobies Sula Granti, Leslie D. Clifford, David J. Anderson

Marine Ornithology

Egg formation in well-studied poultry includes rapid yolk deposition (RYD), which completes the formation of the ovum, then ovulation and uptake of the ovum by the oviduct to complete egg formation. Roughly a day passes between the end of RYD and oviposition in these species. In other species, notably seabirds, egg formation is paused at the end of RYD for days or even more than a week. The phylogenetic coverage of data on this “oviposition lag” is patchy. We present the first estimate of oviposition lag for the Sulidae (4 d) and only the second estimate for the Suliformes.


A Regionally Significant Population Of White-Tailed Tropicbirds Phaethon Lepturus On Kurehdhoo (Lhaviyani Atoll), Republic Of The Maldives, James C. Russell, Sebastian Steibl, Guy M.W. Stevens Jul 2025

A Regionally Significant Population Of White-Tailed Tropicbirds Phaethon Lepturus On Kurehdhoo (Lhaviyani Atoll), Republic Of The Maldives, James C. Russell, Sebastian Steibl, Guy M.W. Stevens

Marine Ornithology

Coral atoll islands are important breeding sites for tropical seabird species, but on many of these islands, disturbances from humans and introduced mammals have extirpated breeding colonies. In the Republic of the Maldives (Indian Ocean), little published information exists on the location and extent of seabird breeding colonies. Here, we document what appears to be a regionally significant breeding site for White-tailed Tropicbirds Phaethon lepturus on Kurehdhoo, the northern-most inhabited island of Lhaviyani Atoll in the central Maldives. We systematically surveyed the entire island on two separate occasions, six months apart, to count the number of White-tailed Tropicbird nests, their …


Notes On The Birds Of Schirmacher Oasis, Dronning Maud Land, East Antarctica., Peter G. Ryan Jul 2025

Notes On The Birds Of Schirmacher Oasis, Dronning Maud Land, East Antarctica., Peter G. Ryan

Marine Ornithology

The Schirmacher Oasis in central Dronning Maud Land, East Antarctica, has a long history of ornithological observations and is one of the few areas in East Antarctica experiencing a warming climate. Snow Petrels Pagodroma nivea and Wilson’s Storm Petrels Oceanites oceanicus were reported to breed at Schirmacher Oasis in the past, but currently the only confirmed regular breeding species is the South Polar Skua Stercorarius maccormicki. This note summarises observations at the Oasis in November and December 2023. Wilson’s Storm Petrels were the most abundant bird, breeding at several sites along the northern scarp in December. Pairs of Adelie Penguins …


Masthead, Pacific Seabird Group Jul 2025

Masthead, Pacific Seabird Group

Marine Ornithology

No abstract provided.


Page 02: Overview, Kaleigh Hoyt Jul 2025

Page 02: Overview, Kaleigh Hoyt

Zion Cemetery Digital Poster Collection

Page 2 of 12 of the LHI Zion Cemetery Poster Project (FLDOS). Download to view in high resolution.


Page 07: Public Housing & The Reality Of Segregation, Kaleigh Hoyt Jul 2025

Page 07: Public Housing & The Reality Of Segregation, Kaleigh Hoyt

Zion Cemetery Digital Poster Collection

Page 7 of 12 of the LHI Zion Cemetery Poster Project (FLDOS). Download to view in high resolution.


Page 03: Robles Pond Community & Founding Zion, Kaleigh Hoyt Jul 2025

Page 03: Robles Pond Community & Founding Zion, Kaleigh Hoyt

Zion Cemetery Digital Poster Collection

Page 3 of 12 of the LHI Zion Cemetery Poster Project (FLDOS). Download to view in high resolution.


Page 06: Seizing Robles Pond, Kaleigh Hoyt Jul 2025

Page 06: Seizing Robles Pond, Kaleigh Hoyt

Zion Cemetery Digital Poster Collection

Page 6 of 12 of the LHI Zion Cemetery Poster Project (FLDOS). Download to view in high resolution.


Analyses Of Morphological Effects Of Cryopreservation On Plasmodium Yoelii Sporozoites, Lauren J. Topley Jul 2025

Analyses Of Morphological Effects Of Cryopreservation On Plasmodium Yoelii Sporozoites, Lauren J. Topley

USF Tampa Graduate Theses and Dissertations

Malaria is a vector-borne disease and is a major global public health threat caused by the genus Plasmodium. Of the five species that infected humans, Plasmodium vivax and Plasmodium falciparum contribute the highest rates of morbidity and mortality. Research efforts to develop antimalarial drugs and effective vaccines is imperative to the prevention of future cases. Plasmodium has three reproductive stages: sporogonic, liver, and blood. Sporozoites are injected into the human host from an infected female Anopheles mosquito, which travel to the liver to initiate liver stage malaria. Since few sporozoites are successful, the liver stage is a bottleneck of the …


He’S The Kid That No One Wanted: An Autoethnographic Examination Of Preschool Suspensions And Expulsions From A Mother’S Lens, Lisa M. Smith Jul 2025

He’S The Kid That No One Wanted: An Autoethnographic Examination Of Preschool Suspensions And Expulsions From A Mother’S Lens, Lisa M. Smith

USF Tampa Graduate Theses and Dissertations

This autoethnographic research examines the personal and professional journey of advocating against preschool suspensions and expulsions through the lens of a Black mother. Titled He’s The Kid That No One Wanted: An Autoethnographic Examination of Preschool Suspensions and Expulsions from a Mother’s Lens, " it dives into the complicated challenges faced while confronting exclusionary disciplinary practices in early childhood education. This research aims to illuminate the societal and institutional roadblocks encountered when navigating systems of power and to explore the impact of these challenges on both personal identity and professional advocacy. Using a blend of social media artifacts and memory …


Concentration And Composition Of Organic Contaminants In Blackfin Tuna, Yellowfin Tuna, And The Common Clubhook Squid In The Western Gulf Of Mexico, Lisa Rose-Mann Jul 2025

Concentration And Composition Of Organic Contaminants In Blackfin Tuna, Yellowfin Tuna, And The Common Clubhook Squid In The Western Gulf Of Mexico, Lisa Rose-Mann

USF Tampa Graduate Theses and Dissertations

Cephalopods are an important component of pelagic food webs. They play ecological roles not only as predators but also as prey. However, their role as prey in the trophic transfer of organic contaminants to apex predators such as tunas in the Gulf of Mexico (GoM) is not well known. To investigate the importance of cephalopods in tuna diets, stomach samples were collected in February 2020 from tunas caught by rod and reel aboard the F/V Gulf Eagle near two large offshore floating oil/gas platforms in the northwestern GoM. Cephalopod samples were obtained from gut content analysis of 41 tunas caught …