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metal levels in feathers of 12 species of seabirds from midway atoll in the northern pacific ocean.seabirds are excellent subjects for examination of heavy metals because they are long-lived, feed at different distances from land, and exhibit different trophic levels. in this paper we compare the levels of lead, cadmium, mercury arsenic, chromium, manganese, selenium, and tin in the feathers of birds nesting on midway atoll in the northern pacific ocean. we test the null hypothesis that there are no interspecific differences in the levels of metals in the feathers of the adult black-footed al ...200010943901
weights, hematology, and serum chemistry of seven species of free-ranging tropical pelagic seabirds.i established reference values for weight, hematology, and serum chemistry for seven species of free-ranging hawaiian tropical pelagic seabirds comprising three orders (procellariiformes, pelecaniformes, charadriiformes) and six families (procellariidae, phaethontidae, diomedeidae, sulidae, fregatidae, and laridae). species examined included 84 hawaiian darkrumped petrels (pterodoma phaeopygia), 90 wedge-tailed shearwaters (puffinus pacificus), 151 laysan albatrosses (diomedea immutabilis), 69 r ...19969359064
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 ...19724541008
antibodies to influenza viruses (including the human a2-asian-57 strain) in sera from australian shearwaters (puffinus pacificus).sera were collected from 320 shearwaters (puffinus pacificus chlororhynchus) nesting on two islands off the east coast of northern australia in december 1969. about 10% of these sera specifically inhibited the neuraminidase of the 1957 strain of human influenza (a2/asian/57), some to high titre.the neuraminidase of a2/hong kong/68, which has shown considerable drift in man since 1957, was inhibited to a lesser extent by the shearwater sera while the neuraminidase of influenza a0 (bel strain) was ...19705312250
seabirds and plastics don't mix: examining the differences in marine plastic ingestion in wedge-tailed shearwater chicks at near-shore and offshore locations.plastic ingestion by wedge-tailed shearwaters (wts) nesting at near-shore and offshore sites along the east coast of australia were investigated. ingestion rates were at 20% in near-shore lavaged wts, where the beaches were significantly more polluted, compared to 8% in birds at offshore sites. the material and colour of recovered plastics at offshore sites differed significantly between beach surveys and that ingested by seabirds in the same area. this pattern was not evident near-shore. hence, ...201830301107
molecular characterization and three-dimensional structures of avian h8, h11, h14, h15 and swine h4 influenza virus hemagglutinins.of the eighteen hemagglutinin (ha) subtypes (h1-h18) that have been identified in bats and aquatic birds, many ha subtypes have been structurally characterized. however, several subtypes (h8, h11 and h12) still require characterization. to better understand all of these ha subtypes at the molecular level, ha structures from an a(h4n6) (a/swine/missouri/a01727926/2015), an a(h8n4) (a/turkey/ontario/6118/1968), an a(h11n9) (a/duck/memphis/546/1974), an a(h14n5) a/mallard/gurjev/263/1982, and an a( ...202032529072
behavioral and trophic segregations help the tahiti petrel to cope with the abundance of wedge-tailed shearwater when foraging in oligotrophic tropical waters.two species breeding in sympatry are more likely to coexist if their ecological niches are segregated either in time, space or in trophic habits. here, we combined gps-tracking, stable isotope analysis and dna metabarcoding analysis to understand how the rare tahiti petrel pseudobulweria rostrata (tp) copes with the very abundant (i.e. 500,000 breeding pairs) wedge-tailed shearwater ardenna pacifica (wts) when breeding in sympatry in a tropical area. wts foraged in restricted areas along their p ...202032934324
ingestion of marine debris by wedge-tailed shearwaters (ardenna pacifica) on lord howe island, australia during 2005-2018.annual rates of plastic production have been increasing rapidly since the 1950s. inadequate or improper disposal of plastic products has contributed to a significant increase in plastic debris in the world's oceans and a corresponding increase in the number of species negatively affected by this debris. here we investigate trends in the type, amount, and colour of ingested plastic over time, and determine whether ingested plastic contributes to reduced health of wedge-tailed shearwaters (ardenna ...201830041356
dna barcoding reveals seasonal shifts in diet and consumption of deep-sea fishes in wedge-tailed shearwaters.the foraging ecology of pelagic seabirds is difficult to characterize because of their large foraging areas. in the face of this difficulty, dna metabarcoding may be a useful approach to analyze diet compositions and foraging behaviors. using this approach, we investigated the diet composition and its seasonal variation of a common seabird species on the ogasawara islands, japan: the wedge-tailed shearwater ardenna pacifica. we collected fecal samples during the prebreeding (n = 73) and rearing ...201829630670
the initiation of pulmonary respiration in a bird embryo: blood and air cell gas tensions.the gaseous stimuli for pipping and the initiation of pulmonary respiration were examined in th wedge-tailed shearwater (puffinus pacificus) by measuring blood gas tensions in the chorioallantoic vein and air cell gas tensions (pao2 and paco2) prior to and during the pipping process. external pipping (shell fracture) was the first observed pipping event and preceded internal pipping (penetration of air cell and initiation of pulmonary ventilation). this sequence of cracking the eggshell prior to ...19826812190
the initiation of pulmonary respiration in a bird embryo: tidal volume and frequency.pulmonary ventilation in embryos and hatchlings of the wedge-tailed shearwater (puffinus pacificus), measured with a barometric plethysmograph, revealed a progressive rise in tidal volume (vt) and minute volume (ve) during the paranatal period to achieve hatchling levels. vt and ve in internally pipped eggs (penetration of air cell) was 0.06 ml +/- 0.03 (sd) and 3.11 ml . min-1 +/- 1.80, respectively. ventilation was significantly higher (p less than 0.05) in eggs with pip-holes (vt = 0.15 ml +/ ...19827123012
embryonic oxygen consumption and organ growth in the wedge-tailed shearwater.embryonic oxygen consumption and organ growth were measured in the wedge-tailed shearwater (puffinus pacificus), a tropical seabird characterized by slow embryonic growth and a prolonged pipping process prior to hatching. in most organs, growth in unpipped eggs could be represented by a linear regression of organ mass on whole-embryo mass. however, the slopes of the regression lines varied considerably between organs. the slope was steepest for the stomach and lowest in the heart and lungs. oxyg ...19921487360
mass stranding of wedge-tailed shearwater chicks in hawaii.unusual numbers of wedge-tailed shearwater (puffinus pacificus) chicks stranded on oahu (hawaii, usa) in 1994. compared to healthy wedge-tailed shearwater (wtsw) chicks, stranded chicks were underweight, dehydrated, leukopenic, lymphopenic, eosinopenic, and heterophilic; some birds were toxemic and septic. stranded chicks also were hypoglycemic and had elevated aspartate amino transferase levels. most chicks apparently died from emaciation, dehydration, or bacteremia. because many birds with bac ...199910479083
microspectrophotometry of visual pigments and oil droplets in a marine bird, the wedge-tailed shearwater puffinus pacificus: topographic variations in photoreceptor spectral characteristics.microspectrophotometric examination of the retina of a procellariiform marine bird, the wedge-tailed shearwater puffinus pacificus, revealed the presence of five different types of vitamin a(1)-based visual pigment in seven different types of photoreceptor. a single class of rod contained a medium-wavelength sensitive visual pigment with a wavelength of maximum absorbance (lambda(max)) at 502 nm. four different types of single cone contained visual pigments maximally sensitive in either the viol ...200414978063
costs and benefits of trap-neuter-release and euthanasia for removal of urban cats in oahu, hawaii.our goal was to determine whether it is more cost-effective to control feral cat abundance with trap-neuter-release programs or trap and euthanize programs. using stella 7, systems modeling software, we modeled changes over 30 years in abundance of cats in a feral colony in response to each management method and the costs and benefits associated with each method . we included costs associated with providing food, veterinary care, and microchips to the colony cats and the cost of euthanasia, wage ...201323009077
ingestion of marine debris plastic by the wedge-tailed shearwater ardenna pacifica in the great barrier reef, australia.we present the first evidence of ingestion of plastic by seabirds from the southern great barrier reef (gbr), australia. the occurrence of marine debris ingestion in the wedge-tailed shearwater, ardenna pacifica, on heron island was the focus of this preliminary research. our findings indicate that 21% of surveyed chicks are fed plastic fragments by their parents, having ingested 3.2 fragments on average. the most common colours of ingested plastic fragments were off/white (37.5%) and green (31. ...201323711836
stibarokris mariasi sp. nov. - a new quill mite species (acariformes: syringophilidae) parasitizing puffinus pacificus (gmelin) (procellariidae) on johnston atoll.a new quill mite species stibarokris mariasi sp. nov. (acariformes: syringophilidae) is described from the wedge-tailed shearwater puffinus pacificus (gmelin) (procellariiformes: procellariidae) from johnston atoll. females of s. mariasi sp. nov. differ from most similar species s. phoeniconaias skoracki and oconnor, 2010 by the longitudinal branch of the peritremes consisting of 11-14 chambers (vs 15-17 chambers in s. phoeniconaias), the movable cheliceral digit 145 long (vs 170), setal bases c ...201526408580
plastic ingestion by newell's (puffinus newelli) and wedge-tailed shearwaters (ardenna pacifica) in hawaii.the ingestion of plastic by seabirds has been used as an indicator of pollution in the marine environment. on kaua'i, hi, usa, 50.0 % of newell's (puffinus newelli) and 76.9 % of wedge-tailed shearwater (ardenna pacifica) fledglings necropsied during 2007-2014 contained plastic items in their digestive tract, while 42.1 % of adult wedge-tailed shearwaters had ingested plastic. for both species, the frequency of plastic ingestion has increased since the 1980s with some evidence that the mass and ...201627638797
plastic ingestion by seabirds in new caledonia, south pacific.the accumulation of plastic pollutants in marine environments has many adverse effects on wildlife. in particular, marine predators are often exposed to accidental plastic ingestion, that may negatively affect survival due to the concentration of debris in the digestive tract. among the species most vulnerable to plastic ingestion, seabirds are of major interest for conservation because of their wide foraging areas, long generation time and extended lifespan. we analysed stomach contents of 90 s ...202032479297
correlations between per- and polyfluoroalkyl substances (pfass) and body morphometrics in fledgling shearwaters impacted by plastic consumption from a remote pacific island.this study investigated the concentrations of 45 per- and polyfluoroalkyl substances (pfass) in fledgling flesh-footed shearwater (ardenna carneipes; n = 33) and wedge-tailed shearwater (a. pacifica; n = 9) livers via lc-ms/ms and their relationship to body morphometrics and ingested plastic mass recorded in 2019 on lord howe island, nsw, australia. sixteen pfass were detected, of which perfluorooctanesulfonate (pfos) was the dominant compound, detected in 100% of birds (1.34 to 13.4 ng/g ww). l ...202033170512
climate oscillation and the invasion of alien species influence the oceanic distribution of seabirds.spatial and temporal distribution of seabird transiting and foraging at sea is an important consideration for marine conservation planning. using at-sea observations of seabirds (n = 317), collected during the breeding season from 2012 to 2016, we built boosted regression tree (brt) models to identify relationships between numerically dominant seabird species (red-footed booby, brown noddy, white tern, and wedge-tailed shearwater), geomorphology, oceanographic variability, and climate oscillatio ...202032953065
genomic characterization of two novel pathogenic avipoxviruses isolated from pacific shearwaters (ardenna spp.).over the past 20 years, many marine seabird populations have been gradually declining and the factors driving this ongoing deterioration are not always well understood. avipoxvirus infections have been found in a wide range of bird species worldwide, however, very little is known about the disease ecology of avian poxviruses in seabirds. here we present two novel avipoxviruses from pacific shearwaters (ardenna spp), one from a flesh-footed shearwater (a. carneipes) (swpv-1) and the other from a ...201728407753
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