| ecology and removal of introduced rhesus monkeys: desecheo island national wildlife refuge, puerto rico. | a field project was conducted to remove an introduced population of rhesus macaques (macaca mulatta) from desecheo island national wildlife refuge, puerto rico. a group of 57 monkeys from cayo santiago was released on desecheo island in 1966 to study processes of adaptation. observations in 1969 and 1970 implicated the monkeys in a drastic decline of the nesting populations of brown boobies (sula leucogaster) and red-footed boobies (sula sula). previous efforts at trapping and removal had been c ... | 1989 | 2780956 |
| antibodies to human influenzavirus neuraminidase (the a-asian-57 h2n2 strain) in sera from australian pelagic birds. | sera collected from australian pelagic birds specifically inhibited the neuraminidase of the asian/57 (h2n2) strain of human influenzavirus. neuraminidase inhibition titres of some sera were high and the avidity of the inhibitor was comparable to that of specific antibody. the neuraminidase of a/hong kong/1/68 (h3n2), which has undergone considerable antigenic drift in man since 1957, was inhibited to a lesser extent by the bird sera, while the neuraminidases of the a/bel/42 (h0n1) and a/fm/1/47 ... | 1972 | 4541008 |
| molecular phylogeny of babesia poelea from brown boobies (sula leucogaster) from johnston atoll, central pacific. | the phylogenetic relationship of avian babesia with other piroplasms remains unclear, mainly because of a lack of objective criteria such as molecular phylogenetics. in this study, our objective was to sequence the entire 18s, its-1, 5.8s, and its-2 regions of the rrna gene and partial beta-tubulin gene of b. poelea, first described from brown boobies (sula leucogaster) from the central pacific, and compare them to those of other piroplasms. phylogenetic analyses of the entire 18s rrna gene sequ ... | 2006 | 16729712 |
| description of novel babesia species and associated lesions from common murres (uria aalge) from california. | a novel babesia species is described from blood collected from 3 common murres (also known as common guillemots) (uria aalge) from california. this is the first report of a babesia species from the alcidae and the second from the charadriiformes. babesia uriae n. sp. is morphologically similar to several other avian babesia species but can be differentiated from babesia bennetti, the only other species from a host in the charadriiformes, by size of round and amoeboid forms. phylogenetic analysis ... | 2009 | 19348514 |
| comparative phylogeography of brown (sula leucogaster) and red-footed boobies (s. sula): the influence of physical barriers and habitat preference on gene flow in pelagic seabirds. | to test the hypothesis that both physical and ecological barriers to gene flow drive population differentiation in tropical seabirds, we surveyed mitochondrial control region variation in 242 brown boobies (sula leucogaster), which prefer inshore habitat, and 271 red-footed boobies (s. sula), which prefer pelagic habitat. to determine the relative influence of isolation and gene flow on population structure, we used both traditional methods and a recently developed statistical method based on co ... | 2010 | 19931624 |
| feeding associations between guiana dolphins, sotalia guianensis (van bénèden, 1864) and seabirds in the lagamar estuary, brazil. | the main objective of the present study was to describe the characteristics regarding interactions between guiana dolphins, sotalia guianensis and seabirds in feeding associations in two distinct areas of the lagamar estuary, brazil. boat-based surveys directed towards photo-identification studies of s. guianensis were conducted in the cananéia estuary (ce) (25 degrees 01' s and 47 degrees 55' w) from july 2004 to march 2008, as well as in the paranaguá estuarine complex (pec) (25 degrees 24' s ... | 2010 | 20231955 |
| concerted evolution of duplicated mitochondrial control regions in three related seabird species. | many population genetic and phylogenetic analyses of mitochondrial dna (mtdna) assume that mitochondrial genomes do not undergo recombination. recently, concerted evolution of duplicated mitochondrial control regions has been documented in a range of taxa. although the molecular mechanism that facilitates concerted evolution is unknown, all proposed mechanisms involve mtdna recombination. | 2010 | 20074358 |
| seroprevalence of toxoplasma gondii in seabirds from abrolhos archipelago, brazil. | toxoplasma gondii is a coccidian parasite that infects almost all warm-blooded animals, including birds. abrolhos is an archipelago of five islands, located in the atlantic ocean, 56 nautical kilometers from the south coast of the state of bahia, northeastern brazil. part of this archipelago is a national marine park, which is a conservation area protected by the brazilian government. the objective of this study was to determine the occurrence of t. gondii antibodies in sera of seabird's species ... | 2016 | 27514883 |
| community of chewing lice (phthiraptera: amblycera and ischnocera) parasites of resident birds at the archipelago of são pedro and são paulo in northeast brazil. | the current study describes the chewing lice community associated with seabird populations resident at the são pedro and são paulo archipelago in the atlantic ocean in pernambuco state, brazil. adults of three species of seabirds were captured using hand-nets for the collection of biometric data and specimens of ectoparasites. in total, 320 birds were examined (120 sula leucogaster (boddaert), brown booby; 120 anous stolidus (l.), --brown noddy; and 80 anous minutus boie, black noddy) of which 9 ... | 2014 | 25276921 |
| blood parasites in noddies and boobies from brazilian offshore islands - differences between species and influence of nesting habitat. | seabirds are often free from blood parasites, and a recent review suggested that phylogenetic, ecological and life-history parameters can determine the prevalence of blood parasites in seabirds. however, there is a lack of data available from many seabird groups, and a larger database is needed to understand prevalence patterns of blood parasites. we used a molecular screening approach to detect parasites of the genera plasmodium, haemoproteus, leucocytozoon and babesia in five species of two ge ... | 2014 | 24229724 |
| local and interannual variations in mercury and cadmium in eggs of eight seabird species of the sinaloa coast, méxico. | mercury (hg) and cadmium (cd) concentrations in eggs of 8 seabird species inhabiting 5 coastal ecosystems in sinaloa, méxico were determined during 2 breeding seasons (2012 and 2013): blue-footed booby (sula nebouxii), brown booby (sula leucogaster), double-crested cormorant (phalacrocorax auritus), magnificent frigatebird (fregata magnificens), brown pelican (pelecanus occidentalis), royal tern (thalasseus maximus), laughing gull (leucophaeus atricilla), and heermann's gull (larus heermanni). t ... | 2016 | 26887632 |
| persistent organic pollutants in marine biota of são pedro and são paulo archipelago, brazil. | remote islands, such as the são pedro and são paulo archipelago (spspa), brazil, are pristine areas. however, these locations are not exempt from the arrival of anthropogenic agents, such as persistent organic pollutants (pops). the present study aimed to determine the occurrence and distribution of pops in the marine biota of the spspa. sample extractions were performed using a microwave-assisted method. the predominant compounds were pcbs and ddts, which respectively had mean wet weight concen ... | 2013 | 23830520 |
| description and epizootiology of babesia poelea n. sp. in brown boobies (sula leucogaster (boddaert)) on sand island, johnston atoll, central pacific. | we describe a new species of piroplasm from brown boobies (sula leucogaster) on sand island, johnston atoll national wildlife refuge, central pacific. mean parasitemia in adults and chicks was less than 1%, with the parasitemia in chicks significantly greater than in adults. there was no significant relation between the age of chicks and the degree of parasitemia. parasitized red cells and red cell nuclei were significantly smaller than those of unparasitized cells, and infected birds appeared c ... | 1997 | 9267418 |
| skin lipids from saudi arabian birds. | skin lipids play an important role in the regulation of cutaneous water loss (cwl). earlier studies have shown that saudi desert birds exhibit a tendency of reduced cwl than birds from temperate environment due to adaptive changes in composition of their skin lipids. in this study, we used thin-layer chromatography (tlc) for separation and detection of non-polar and polar lipids from the skin of six bird species including sooty gull, brown booby, house sparrow, arabian waxbill, sand partridge, a ... | 2014 | 24600311 |
| environmental predictors of seabird wrecks in a tropical coastal area. | beached bird surveys have been widely used to monitor the impact of oil pollution in the oceans. however, separating the combined effects of oil pollution, environmental variables and methodological aspects of beach monitoring on seabird stranding patterns is a challenging task. the effects of a comprehensive set of oceanographic and climatic variables and oil pollution on seabird strandings in a tropical area of brazil were investigated herein, using two robust and innovative methods: generaliz ... | 2016 | 27992578 |
| community-wide patterns of plastic ingestion in seabirds breeding at french frigate shoals, northwestern hawaiian islands. | between 2006 and 2013, we salvaged and necropsied 362 seabird specimens from tern island, french frigate shoals, northwestern hawaiian islands. plastic ingestion occurred in 11 of the 16 species sampled (68.75%), representing four orders, seven families, and five foraging guilds: four plunge-divers, two albatrosses, two nocturnal-foraging petrels, two tuna-birds, and one frigatebird. moreover, we documented the first instance of ingestion in a previously unstudied species: the brown booby. plast ... | 2017 | 28844458 |
| trace elements in feathers and eggshells of brown booby sula leucogaster in the marine national park of currais islands, brazil. | levels of trace elements were investigated in feathers of 51 adults and 47 eggshells of brown boobies sula leucogaster from one bird colony in the marine national park of currais islands, brazil, between december 2013 and october 2014. average concentrations (μg g(-1), dry weight) in feathers and eggshells, respectively, were al 50.62-9.58, as 0.35-2.37, cd 0.05-0.03, co 0.38-2.1, cu 15.12-0.99, fe 47.47-22.92, mg 815.71-1116.92, ni 0.29-11.85, and zn 94.16-1.98. in both arrays, the average conc ... | 2017 | 28891020 |
| oxidative stress during courtship affects male and female reproductive effort differentially in a wild bird with biparental care. | oxidative stress has been suggested as one of the physiological mechanisms modulating reproductive effort, including investment in mate choice. here, we evaluated whether oxidative stress influences breeding decisions by acting as a cost of or constraint on reproduction in the brown booby (sula leucogaster), a long-lived seabird with prolonged biparental care. we found that during courtship, levels of lipid peroxidation (lp) of males and females were positively associated with gular skin color, ... | 2016 | 27802141 |
| marine debris is selected as nesting material by the brown booby (sula leucogaster) within the swain reefs, great barrier reef, australia. | many seabirds are impacted by marine debris through its presence in foraging and nesting areas. to determine the extent of this problem, marine debris use in nest material of the brown booby (sula leucogaster) in the great barrier reef, australia, was investigated. nine cays were examined using beach and nest surveys. on average, four marine debris items were found per nest (n=96) with 58.3% of surveyed nests containing marine debris. the source of marine debris in nests and transects were prima ... | 2014 | 25131418 |
| prevalence and composition of marine debris in brown booby (sula leucogaster) nests at ashmore reef. | anthropogenic debris is ubiquitous in the marine environment and has been reported to negatively impact hundreds of species globally. seabirds are particularly at risk from entanglement in debris due to their habit of collecting food and, in many cases, nesting material off the ocean's surface. we compared the prevalence and composition of debris in nests and along the beach at two brown booby (sula leucogaster) colonies on ashmore reef, timor sea, a remote area known to contain high densities o ... | 2013 | 24269009 |
| evaluation of the possible adverse effects of legacy persistent organic pollutants (pops) on the brown booby (sula leucogaster) along the brazilian coast. | this study aimed to investigate the impact of contamination by persistent organic pollutants (pops) on brazilian wildlife. the concentrations of certain pops, including dichlorodiphenyltrichloroethane (ddt) and polychlorinated biphenyls (pcbs), in the eggs of the brown booby (sula leucogaster) were measured. the eggs were collected from breeding colonies located on three archipelagos (saint peter and saint paul, abrolhos and cagarras islands) in the atlantic ocean, which are located at different ... | 2012 | 22391047 |
| evolution of the melanocortin-1 receptor (mc1r) in boobies and gannets (aves, suliformes). | the melanocortin-1 receptor (mc1r) has been linked to intraspecific variation of melanin-based plumage color in several unrelated bird species. however, its involvement in interspecific variation has far less evidence. the sulidae is a family in the suliformes composed of 10 species of pelagic seabirds, distributed in 3 genera. there is significant variation in the amount and distribution of melanin pigments among species in the family sulidae, and 2 species, the brown booby (sula leucogaster) a ... | 2012 | 22351934 |
| mechanisms of global diversification in the brown booby (sula leucogaster) revealed by uniting statistical phylogeographic and multilocus phylogenetic methods. | recent theoretical and empirical research suggests that statistical models based on coalescent theory can improve both phylogeographic and phylogenetic inference. an approach that involves elements of both statistical phylogeography (e.g. isolation with migration analyses) and multilocus phylogenetic inference (e.g. *beast) may be particularly useful when applied to populations with relatively old divergence times. here, we use such an approach in the globally distributed brown booby (sula leuco ... | 2011 | 21615811 |
| social interactions of juvenile brown boobies at sea as observed with animal-borne video cameras. | while social interactions play a crucial role on the development of young individuals, those of highly mobile juvenile birds in inaccessible environments are difficult to observe. in this study, we deployed miniaturised video recorders on juvenile brown boobies sula leucogaster, which had been hand-fed beginning a few days after hatching, to examine how social interactions between tagged juveniles and other birds affected their flight and foraging behaviour. juveniles flew longer with congeners, ... | 2011 | 21573196 |
| organchlorine content and shell thickness in brown booby (sula leucogaster) eggs in the gulf of california and the southern pacific coast of mexico. | we determined egg concentrations of organochlorines and thickness of eggshells from brown boobies at eight colonies ranging from the northern gulf of california to southern mexico. the only common residue was that of dde, which was found in almost all eggs. dde content apparently reflected pre-1990 ddt use in nearby agricultural areas and, at one site, intensive mosquito control for high-end tourism development. there were no inter-colony differences in eggshell thickness, and variation in this ... | 2009 | 19356832 |
| development of flight performance in the brown booby. | how do birds acquire flight skills after fledging? this issue is important, as it is closely related to variation in the duration of offspring care, the causes of which remain unknown. in this study, we raised hatchling brown boobies, sula leucogaster, and attached an acceleration data logger to each bird at fledging to record its movements. this allowed us to quantify precisely the time spent flapping, gliding and resting. the duration of foraging trips and proportion of time spent gliding duri ... | 2004 | 15252995 |
| weights, hematology, and serum chemistry of free-ranging brown boobies (sula leucogaster) in johnston atoll, central pacific. | hematologic and serum chemistry values are reported for 105 brown boobies (sula leucogaster) from johnston atoll, central pacific. hematocrit, estimated total plasma solids, total and differential white cell counts, serum glucose, calcium, phosphorus, uric acid, total protein, albumin, globulin, aspartate aminotransferase, and creatinine phosphokinase were analyzed. hematologic and serum chemistry values varied with age and sex. values were compared with those of red-footed boobies and other tro ... | 1999 | 10367648 |
| trends in seabird breeding populations across the great barrier reef. | the great barrier reef is an iconic ecosystem, known globally for its rich marine biodiversity that includes many thousands of tropical breeding seabirds. despite indications of localised declines in some seabird species from as early as the mid-1990s, trends in seabird populations across the reef have never been quantified. with a long history of human impact and ongoing environmental change, seabirds are likely sentinels in this important ecosystem. using four decades of monitoring data, we es ... | 2020 | 32885491 |
| interspecific variation of essential and non-essential trace elements in sympatric seabirds. | chemical pollution is a growing issue for ocean ecosystems, threatening especially apex predators because they bioaccumulate persistent chemical pollutants such as non-essential trace elements. the trophic position is thus a key aspect when assessing the impacts of environmental pollution in marine organisms. here we investigate the differences in the concentrations of essential (cu, cr, se, and zn) and non-essential elements (hg, al, as, cd, and sr), in muscular and hepatic tissues of four symp ... | 2018 | 30005259 |
| trace element concentrations in feathers from three seabird species breeding in the timor sea. | mobile marine predators, such as seabirds, are frequently used as broad samplers of contaminants that are widespread in the marine environment. the timor sea off remote western australia is a poorly studied, yet rapidly expanding area of offshore development. to provide much needed data on contamination in this region, we quantified trace element concentrations in breast feathers of three seabird species breeding on bedout island. while adult masked boobies sula dactylatra exhibited some of the ... | 2020 | 32056652 |
| causes of fatal cyathostomiasis in brown booby (sula leucogaster) from brazil: identification of pathogen and implications for management. | fatal infection by cyathostoma (cyathostoma) phenisci (nematoda: syngamidae), was identified in 2 of 52 brown boobies (sula leucogaster) collected on beaches in the state of rio de janeiro, brazil, and admitted to the veterinary clinic for rehabilitation. both infected birds were in poor physical condition, with atrophied pectoral muscles, and died soon after starting treatment. the parasitological and pathological examination of the carcasses revealed the presence of c. (c.) phenisci in the tra ... | 2020 | 32294190 |
| incidence of anthropogenic material in sula leucogaster nests in a distant archipelago of brazil. | anthropogenic debris has been affecting fauna in different ways. we investigate the frequency of anthropogenic material in nests of a brown booby (sula leucogaster) colony in the saint peter and saint paul archipelago (spspa), rio grande do norte, brazil in february 2015 and november 2016. the items were classified according to type (threadlike plastic, sheet plastics, hard fragments, foamed synthetics and miscellaneous) and color. in 2015, a total of 30 anthropogenic items were found in 20.4% o ... | 2020 | 32056608 |
| the use of anthropogenic marine debris as a nesting material by brown boobies (sula leucogaster). | marine debris is pervasive worldwide, and affects biota negatively. we compared the characteristics of debris incorporated within brown booby (sula leucogaster) nests throughout their pantropical distribution by assessing the type, colour and mass of debris items within nests and in beach transects at 18 sites, to determine if nests are indicators of the amount of debris in local marine environments. debris was present in 14.4% of nests surveyed, with the proportion of nests with debris varying ... | 2018 | 30503494 |
| carotenoid-based skin ornaments reflect foraging propensity in a seabird, sula leucogaster. | carotenoid-based ornaments are common signalling features in animals. it has long been proposed that such ornaments communicate information about foraging abilities to potential mates. however, evidence linking foraging with ornamentation is largely missing from unmanipulated, free-ranging populations. to investigate this relationship, we studied a coastal population of brown booby (sula leucogaster brewsteri), a seabird with a carotenoid-based gular skin ornament. δ13c values from both feathers ... | 2018 | 30258030 |
| seabirds fighting for land: phenotypic consequences of breeding area constraints at a small remote archipelago. | identifying associations between phenotypes and environmental parameters is crucial for understanding how natural selection acts at the individual level. in this context, genetically isolated populations can be useful models for identifying the forces selecting fitness-related traits. here, we use a comprehensive dataset on a genetically and ecologically isolated population of the strictly marine bird, the brown booby sula leucogaster, at the tropical and remote saint peter and saint paul archip ... | 2018 | 29330422 |