Publications

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volatile methylsiloxanes and organophosphate esters in the eggs of european starlings (sturnus vulgaris) and congeneric gull species from locations across canada.volatile methylsiloxanes (vmss) and organophosphate esters (opes) are two suites of chemicals that are of environmental concern as organic contaminants, but little is known about the exposure of wildlife to these contaminants, particularly in birds, in terrestrial and aquatic ecosystems. the present study investigates the spatial distributions of nine cyclic and linear vmss and 17 opes in the eggs of european starlings (sturnus vulgaris) and three congeneric gull species (i.e., herring gull (lar ...201728771368
the most common diet results in low reproduction in a generalist seabird.dietary specialization has been described across a wide range of taxa in the animal kingdom. fitness consequences are, however, not well documented. we examined the reproductive consequences of different dietary specializations in the herring gull larus argentatus, an omnivorous seabird, using an extensive dataset which includes breeding and dietary data of 10 successive years. we hypothesized that pairs that focused on prey of higher energetic value would yield higher fledging rates. an alterna ...201728690792
detection of wellfleet bay virus antibodies in sea birds of the northeastern united states.wellfleet bay virus (wfbv) is a recently described orthomyxovirus isolated from the tissues of common eiders (somateria mollissima) collected during recurrent mortality events on cape cod, massachusetts, usa. coastal massachusetts is the only location where disease or mortality associated with this virus has been detected in wild birds, and a previous seroprevalence study found a significantly higher frequency of viral exposure in eiders from this location than from other areas sampled in north ...201728640712
human hair, baltic grey seal (halichoerus grypus) fur and herring gull (larus argentatus) feathers as accumulators of bisphenol a and alkylphenols.the purpose of the study was to determine the concentration of bisphenol a (bpa), 4-tert-octylphenol (op), and 4-nonylphenol (np), in human hair, the fur of baltic grey seals and the feathers of herring gulls. hair was collected from 42 volunteers, while grey seal fur (n = 17) came from the seal centre in hel (marine station of institute of oceanography, university of gdansk) and gull covert feathers (n = 26) were collected from dead herring gulls along the southern baltic coast. assays of pheno ...201728451711
flexibility of habitat use in novel environments: insights from a translocation experiment with lesser black-backed gulls.being faced with unknown environments is a concomitant challenge of species' range expansions. strategies to cope with this challenge include the adaptation to local conditions and a flexibility in resource exploitation. the gulls of the larus argentatus-fuscus-cachinnans group form a system in which ecological flexibility might have enabled them to expand their range considerably, and to colonize urban environments. however, on a population level both flexibility and local adaptation lead to si ...201728280543
inhalation - route of edc exposure in seabirds (larus argentatus) from the southern baltic.despite the presence of endocrine disrupting mercury, pahs, alkylphenols and bisphenol a in inhaled air, scientific literature lacks information on their penetration into the lungs. large lung capacity in birds makes this route of penetration more significant than in other animals. the studies were conducted on lungs of herring gulls found in the gulf of gdansk area. the results were juxtaposed with other tissues, including the intestines, which reflect the main, alimentary penetration route of ...201728159334
mercury levels in herring gulls and fish: 42 years of spatio-temporal trends in the great lakes.total mercury levels in aquatic birds and fish communities have been monitored across the canadian great lakes by environment and climate change canada (eccc) for the past 42 years (1974-2015). these data (22 sites) were used to examine spatio-temporal variability of mercury levels in herring gull (larus argentatus) eggs, lake trout (salvelinus namaycush), walleye (sander vitreus), and rainbow smelt (osmerus mordax). trends were quantified with dynamic linear models, which provided time-variant ...201728092768
miniaturization of a transthyretin binding assay using a fluorescent probe for high throughput screening of thyroid hormone disruption in environmental samples.thyroid hormone (th) disrupting compounds are potentially important environmental contaminants due to their possible adverse neurological and developmental effects on both humans and wildlife. currently, the most successful bio-analytical method to detect and evaluate th disruptors, which target the plasma transport of th in environmental samples, is the radio-ligand thyroxine-transthyretin (t4-ttr) binding assay. yet, costly materials and tedious handling procedures prevent the use of this assa ...201728063299
chlorinated herbicides in fish, birds and mammals in the baltic sea.the aim of the present work was to determine the concentration levels, as well as accumulation and magnification coefficients, of triazine derivatives in herring gulls and baltic grey seals 11 years after a ban on their use in the eu and eight after their exclusion in poland. dead birds were collected in the coastal zone of the gulf of gdansk in the years 2010-2012. the grey seals, on the other hand, were from before 2007, when s-triazine derivatives were still in use. triazine herbicides (atraz ...201726246644
lead levels in exposed herring gulls: differences in the field and laboratory.we compared blood lead levels for herring gull (larus argentatus) chicks exposed at two days of age in the field and the laboratory. one randomly selected chick in each family of three was injected with lead, the second with a sterile saline solution, and the third was not injected. field birds were then completely free-living, and were entirely cared for by their parents. blood was drawn at 35 or 45 days of age for comparison with laboratory-reared chicks. in both the laboratory and the field, ...20179200787
mercury in feathers and blood of gulls from the southern baltic coast, poland.gulls were assessed as sentinels of contamination in the coastal zone of the southern baltic, research material being obtained from dead birds collected on polish beaches and near fishing ports in 2009-2012. in feathers and blood of four gull species: herring gull (larus argentatus), common gull (larus canus), black-headed gull (chroicocephalus ridibundus), and great black-backed gull (larus marinus), concentration of total mercury (hgt) was assayed, taking into account the type of feathers, sex ...201728344366
post mortem findings and their relation to aa amyloidosis in free-ranging herring gulls (larus argentatus).since the late 1990s, high mortality and declining populations have been reported among sea birds including herring gulls (larus argentatus) from the baltic sea area in northern europe. repeated bont type c/d botulism outbreaks have occurred, but it remains unclear whether this is the sole and primary cause of mortality. thiamine deficiency has also been suggested as a causal or contributing factor. with this study, we aimed to investigate gross and microscopic pathology in herring gulls from af ...201829494674
the influence of avian biovectors on mercury speciation in a bog ecosystem.methylmercury (mehg) is a neurotoxin and endocrine disruptor that bioaccumulates and biomagnifies through trophic levels, resulting in potentially hazardous concentrations. although wetlands are known hotspots for mercury (hg) methylation, the effects of avian biovectors on these processes are poorly understood. we examined hg speciation and distribution in shallow groundwater and surface water from a raised-bog with over 30years of avian biovector (herring gulls larus argentatus and great black ...201829751308
plastic and non-plastic debris ingestion in three gull species feeding in an urban landfill environment.plastic debris is recognized as a widespread, common and problematic environmental pollutant. an important consequence of this pollution is the ingestion of plastic debris by wildlife. assessing the degree to which different species ingest plastics, and the potential effects of these plastics on their health are important research needs for understanding the impacts of plastic pollution. we examined debris (plastic and other types) ingestion in three sympatric overwintering gull species (herring ...201829282493
effects of urbanization on the foraging ecology and microbiota of the generalist seabird larus argentatus.larus gull species have proven adaptable to urbanization and due to their generalist feeding behaviors, they provide useful opportunities to study how urban environments impact foraging behavior and host-associated microbiota. we evaluated how urbanization influenced the foraging behavior and microbiome characteristics of breeding herring gulls (larus argentatus) at three different colonies on the east coast of the united states. study colonies represented high, medium and low degrees of urbaniz ...201830562368
intercolony variations in movement patterns and foraging behaviors among herring gulls (larus argentatus) breeding in the eastern wadden sea.herring gulls (larus argentatus) are opportunistic predators that prefer to forage in the intertidal zone, but an increasing degree of terrestrial foraging has recently been observed. we therefore aimed to analyze the factors influencing foraging behavior and diet composition in the german wadden sea. gulls from three breeding colonies on islands at different distances from the mainland were equipped with gps data loggers during the incubation seasons in 2012-2015. logger data were analyzed for ...201830151168
decreasing δ13c and δ15n values in four coastal species at different trophic levels indicate a fundamental food-web shift in the southern north and baltic seas between 1988 and 2016.marine ecosystems are exposed to increasing human pressures and climatic change worldwide. it has therefore become essential to describe ecosystem statuses with respect to multinational protection schemes, often necessitating long-term monitoring programmes. changes in the food-web structure, which can be monitored via stable isotope measurements, represent an important descriptor of the status of marine ecosystems. we investigated long-term changes (29 years) in isotopic values (δ13c and δ15n) ...201829998431
legacy of legacies: chlorinated naphthalenes in lake trout, walleye, herring gull eggs and sediments from the laurentian great lakes indicate possible resuspension during contaminated sediment remediation.polychlorinated naphthalenes (pcns) are legacy contaminants, produced primarily as flame retardants and dielectrics until phased-out in europe and north america in the 1970s. spatial and temporal trends (1979-2013) of pcn concentrations were studied in whole fish and herring gull eggs throughout the great lakes and st. lawrence river, whereas sediments were analyzed for 2011-2013 only. for both fish and gull eggs, concentrations of pcns were highest in western lake erie (7660 & 3020pg/gww respec ...201829710642
spatial trends in a biomagnifying contaminant: application of amino acid compound-specific stable nitrogen isotope analysis to the interpretation of bird mercury levels.levels of biomagnifying contaminants are greatest in high-trophic level biota (e.g., predatory birds such as gulls). gull eggs have been used to assess contaminant spatial patterns and sources, but such assessments must consider how organism trophic position may influence spatial inferences. stable nitrogen isotopes (δ15 n) in bulk tissue are routinely used in this context. however, bulk δ15 n values are only useful if spatial differences in baseline δ15 n values are considered. amino acid compo ...201829446488
temporal trends in a biomagnifying contaminant: application of amino acid compound-specific stable nitrogen isotope analysis to the interpretation of bird mercury levels.temporal trends in levels of biomagnifying contaminants, such as mercury (hg), in top predators can provide insights into changes in contaminant bioavailability through time. however, interpreting contaminant temporal trends in predators can be confounded by temporal changes in their diets, which, in turn, could affect organism trophic position and exposure to biomagnifying contaminants. to address this issue, bulk stable nitrogen isotope analysis, that is, analysis of whole tissue, is widely in ...201829341238
substituted diphenylamine antioxidants and benzotriazole uv stabilizers in aquatic organisms in the great lakes of north america: terrestrial exposure and biodilution.substituted diphenylamine antioxidants (sdpas) and benzotriazole uv stabilizers (bzt-uvs) are industrial additives of emerging environmental concern. however, the bioaccumulation, biomagnification, and spatial distribution of these contaminants in the great lakes of north america are unknown. the present study addresses these knowledge gaps by reporting sdpas and bzt-uvs in herring gull (larus argentatus) eggs, lake trout (salvelinus namaycush), and their food web in the great lakes for the firs ...201829286648
in vitro and in silico competitive binding of brominated polyphenyl ether contaminants with human and gull thyroid hormone transport proteins.tetradecabromo-1,4-diphenoxybenzene (tedb-diphobz) is a highly brominated additive flame retardant (fr). debrominated photodegradates of tedb-diphobz are hydroxylated in vitro in liver microsomal assays based on herring gulls (larus argentatus), including one metabolite identified as 4″-oh-2,2',2″,4-tetrabromo-diphobz. chemically related methoxylated tetra- to hexabromo-diphobzs are known contaminants in herring gulls. collectively, nothing is currently known about biological effects of these po ...201829283575
an engineering perspective on the microstructure and compression properties of the seagull larus argentatus feather rachis.the feathers of the seagull larus argentatus are lightweight but can withstand high alternating stresses and exhibit excellent stiffness and strength. the shaft is an important part of the feather, with the functions of body protection and supporting flight. in this study, the microstructure properties of l. argentatus feather rachis were analysed by scanning electron microscopy (sem). these analysis methods enabled the configuration, structure and compression properties of the rachis to be inve ...201931450186
herring gulls respond to human gaze direction.human-wildlife conflict is one of the greatest threats to species populations worldwide. one species facing national declines in the uk is the herring gull (larus argentatus), despite an increase in numbers in urban areas. gulls in urban areas are often considered a nuisance owing to behaviours such as food-snatching. whether urban gull feeding behaviour is influenced by human behavioural cues, such as gaze direction, remains unknown. we therefore measured the approach times of herring gulls to ...201931387474
halogenated organic compounds in the eggs of aquatic birds from the gulf of gdansk and wloclawek dam (poland).diet is the major route of exposure to environmental contaminants in biota and, after penetration into an organism, xenobiotics continue to accumulate in the body. in birds the egg-laying process acts as a transfer mechanism for the accumulated pollutants and results in the burdening of the next generation at an early stage of development. this transfer has a strong influence on developmental disorders and even breeding success. with this in mind polybrominated diphenyl ethers (pbde), polychlori ...201931382198
tetrabromobisphenol-a-bis(dibromopropyl ether) flame retardant in eggs, regurgitates, and feces of herring gulls from multiple north american great lakes locations.the occurrence of tetrabromobisphenol-a-bis(2,3,-dibromopropyl ether) (tbbpa-bdbpe) flame retardant is generally unknown in wildlife. a highly sensitive, gas chromatography-mass spectrometry-based method was developed for tbbpa-bdbpe with optimized parameters for large volume injection. we report on tbbpa-bdbpe and temporal and spatial trends in herring gull egg pools and individuals from 14 colony sites across the laurentian great lakes of north america. tbbpa-bdbpe identification was confirmed ...201931364365
recent findings of halogenated flame retardants (hfr) in the german and polar environment.to get an overview about distribution, levels and temporal trends of polybrominated diphenyl ethers (pbde) and halogenated flame retardants (hfr) of emerging concern, different types of environmental samples archived in the german environment specimen bank as well as fish filet samples from the arctic (n = 13) and antarctica (n = 5) were analysed for 43 substances (24 pbde, 19 hfr) using a multi-column clean-up and gc-api-ms/ms or gc-ms. sample types were herring gull egg (n = 3), blue mussel (n ...201931349194
spatial and temporal variability of perfluoroalkyl substances in the laurentian great lakes.per- and polyfluoroalkyl substances (pfas) are a diverse group of fluorinated organic chemicals that have been used in industrial and consumer applications since the 1950s. pfas are resistant to chemical and biological degradation and are ubiquitous in the environment, including in water, sediment, and biota in the laurentian great lakes. this critical review evaluates the spatial and temporal variability of commonly studied perfluoroalkyl sulfonates (pfsas) and perfluoroalkyl carboxylates (pfca ...201931347638
foraging for high caloric anthropogenic prey is energetically costly.several generalist species benefit from food provided by human activities. food from anthropogenic sources is often high in caloric value and can positively influence reproductive success or survival. however, this type of resource may require specific foraging skills and habitat experience with related costs and benefits. as a result, not all individuals utilize these resources equally, with some individuals preferentially foraging in habitats where natural resources of lower energy content are ...201931149339
correction to: winter home range and habitat selection differs among breeding populations of herring gulls in eastern north america.[this corrects the article doi: 10.1186/s40462-019-0152-x.].201931044077
winter home range and habitat selection differs among breeding populations of herring gulls in eastern north america.recognizing the factors influencing migratory individuals throughout their annual cycle is important for understanding the drivers of population dynamics. previous studies have found that herring gulls (larus argentatus) in the atlantic region have lower survival rates than those in the great lakes and the arctic. one possible explanation for divergent survival rates among these populations is differences in their non-breeding habitats.201930891245
interindividual variation in the cytochrome p4501a response to 2,3,7,8-tetrachlorodibenzo-p-dioxin in herring gull embryo hepatocytes.exposure to dioxin-like compounds is consistently associated with concentration-dependent induction of cytochrome p4501a (cyp1a) enzymes in primary cultures of avian hepatocytes. we have previously demonstrated that the median effective concentration (ec50) for induction of this response is predictive of in vivo sensitivity to dioxin-like compounds in birds. we investigated sources of interindividual variation in the cyp1a response to 2,3,7,8-tetrachlorodibenzo-p-dioxin (tcdd) in wild herring gu ...201930615215
meteorological factors affecting the risk of transmission of hpai in miyazaki, japan.highly pathogenic avian influenza (hpai) outbreaks engender a severe economic impact on the poultry industry and public health. migratory waterfowl are considered the natural hosts of hpai virus, and hpai viruses are known to be transmitted over long distances during seasonal bird migration. bird migration is greatly affected by the weather. many studies have shown the relationship between either autumn or spring bird migration and climate. however, few studies have shown the relationship betwee ...201931565229
novel insights into chromosome evolution of charadriiformes: extensive genomic reshuffling in the wattled jacana (jacana jacana, charadriiformes, jacanidae).the order charadriiformes comprises three major clades: lari and scolopaci as sister group to charadrii. until now, only three charadriiformes species have been studied by chromosome painting: larus argentatus (lari), burhinus oedicnemus and vanellus chilensis (charadrii). hence, there is a lack of information concerning the third clade, scolapaci. based on this, and to gain a better understanding of karyotype evolution in the order charadriiformes, we applied conventional and molecular cytogene ...202032105288
foraging ecology drives mercury contamination in chick gulls from the english channel.although mercury (hg) occurs naturally, human activity is currently the greatest source of release and the ocean receives hg inputs by rivers and atmospheric deposition. seabirds including chicks serve as valuable bioindicators of hg contamination, reflecting local contamination around the colony. this study investigates the ecological drivers (trophic position and foraging habitat) influencing hg concentrations in blood and feathers of chicks of three sympatric marine gull species. chicks were ...202033162157
interspecies comparisons of brominated flame retardants in relation to foraging ecology and behaviour of gulls frequenting a uk landfill.this study quantifies and compares concentrations and profiles of legacy and alternative (alt-) brominated flame retardants (bfrs) in the eggs of three gull (laridae) species of international/uk conservation concern - great black-backed gulls (larus marinus; n = 7), european herring gulls (l. argentatus; n = 16) and lesser black-backed gulls (l. fuscus; n = 11) in relation to their foraging ecology and behaviour in order to investigate potential exposure pathways at a remote landfill in western ...202033131861
opportunistic predation of birds by breeding herring gulls (larus argentatus).dietary specialization, exploiting a small fraction of available food resources, is commonly reported for gulls and skuas. predation of birds by these species is usually considered a specialist strategy employed by the minority of the population but non-specialists also predate birds and may actually have a greater impact on the prey species. to date, most studies have focused on predatory bird-specialists, down-playing the possible importance of opportunistic predation by non-specialists. we ad ...202033057336
common eider and herring gull as contaminant indicators of different ecological niches of an urban fjord system.seabirds like gulls are common indicators in contaminant monitoring. the herring gull (larus argentatus) is a generalist with a broad range of dietary sources, possibly introducing a weakness in its representativeness of aquatic contamination. to investigate the herring gull as an indicator of contamination in an urban-influenced fjord, the norwegian oslofjord, we compared concentrations of a range of lipophilic and protein-associated organohalogen contaminants (ohcs), hg, and dietary markers in ...202032926521
genome sequence of colistin-resistant escherichia coli clr8, isolated from the feces of larus argentatus.migratory birds are potential vehicles of antibiotic-resistant bacteria. in this study, a colistin-resistant escherichia coli strain, clr8, was isolated from the feces of larus argentatus the draft genome sequence of the strain indicated that it hosts mcr-1, which is a plasmid-mediated colistin resistance gene.202032646903
both short and long distance migrants use energy-minimizing migration strategies in north american herring gulls.recent studies have proposed that birds migrating short distances migrate at an overall slower pace, minimizing energy expenditure, while birds migrating long distances minimize time spent on migration to cope with seasonal changes in environmental conditions.202032549986
occurrence of esbl-producing escherichia coli st131, including the h30-rx and c1-m27 subclones, among urban seagulls from the united kingdom.antimicrobial resistance is a public health concern. understanding any role that urban seagulls may have as a reservoir of resistant bacteria could be important for reducing transmission. this study investigated fecal escherichia coli isolates from seagulls (herring gulls and lesser black-backed gulls) to determine the prevalence of extended-spectrum cephalosporin-resistant (esc-r) and fluoroquinolone-resistant e. coli among gull species from two cities (taunton and birmingham) in the united kin ...202032519936
the prevalence and source of plastic incorporated into nests of five seabird species on a small offshore island.there is little evidence documenting the prevalence of plastic nest incorporation for different seabird species and populations, and even less detailing the source of such debris as nesting material. this study presents a baseline dataset on the presence of plastic in the nests of five seabird species on lady isle, scotland using a novel and repeatable methodology for quantifying plastic incorporated into nests. plastic was found in 24.5% to 80% of nests of all species. we analysed pellets of re ...202032319907
distribution behaviour in body compartments and in ovo transfer of flame retardants in north american great lakes herring gulls.polybrominated diphenyl ethers (pbdes) and other halogenated flame retardants (hfrs) continue to be an environmental concern. in the laurentian great lakes, herring gulls (larus argentatus) are an important wildlife sentinel species, although very little information is available regarding the body distribution (limited to e.g. liver and blood) of these contaminants and in relation to depuration via in ovo transfer. maternal transfer rates and distribution were presently determined in six body co ...202032163809
molecular identification of four sarcocystis species in the herring gull, larus argentatus, from lithuania.birds of the family laridae have not been intensively examined for infections with sarcocystis spp. to date, sarcocysts of two species, s. lari and s. wobeseri, have been identified in the muscles of gulls. the aim of the present study was to evaluate the species richness of sarcocystis in the herring gull, larus argentatus, from lithuania.202031907072
urban herring gulls use human behavioural cues to locate food.while many animals are negatively affected by urbanization, some species appear to thrive in urban environments. herring gulls (larus argentatus) are commonly found in urban areas and often scavenge food discarded by humans. despite increasing interactions between humans and gulls, little is known about the cognitive underpinnings of urban gull behaviour and to what extent they use human behavioural cues when making foraging decisions. we investigated whether gulls are more attracted to anthropo ...202032257348
intestinal flukes recovered from a herring gull, larus argentatus, in the republic of korea.trematode specimens were collected from the intestine of a herring gull, larus argentatus, which was found in a critical condition on the shore of a small island (yubu-do, seocheon-gun, chungcheongnam-do) located at the western coast of the korean peninsula. total 11 specimens of intestinal flukes, including 3 cryptocotyle lingua (heterophyidae), 1 himasthla alincia (echinostomatidae), 5 cardiocephaloides medioconiger (strigeidae), and 2 diplostomum spathaceum (diplostomidae), were recovered. c. ...202032145732
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