| gastrointestinal helminths of fish-eating birds from chiloe island, chile. | of four species of fish-eating birds from chiloé island (chile), three were infected with eight species of helminths. tetrabothrius sp. was found in larus scoresbii. tetrabothrius cylindraceus, profilicollis antarcticus, anomotaenia dominicanus, stephanoprora denticulata, capillaria sp. and p. antarcticus were found in larus dominicanus. contracaecum rudolphii and corynosoma sp. infected phalacrocorax olivaceus. with the exception of s. denticulata, c. rudolphii and capillaria sp., the above hel ... | 1991 | 2023322 |
| control of renal and extrarenal salt and water excretion by plasma angiotensin ii in the kelp gull (larus dominicanus). | the osmoregulatory effects of intravenously (i.v.) administered angiotensin ii (aii) at dose rates of 5, 15 and 45 ng.kg-1.min-1 were examined in kelp gulls utilizing salt gland and/or kidneys as excretory organs. in birds given i.v. infusion of 1200 mosmolal nacl at 0.3 ml.min-1 and utilizing only the salt glands to excrete the load, infusion of aii for 30 min consistently inhibited salt gland function in a dose-dependent manner. in birds given i.v. infusion of 500 mosmolal nacl at 0.72 ml.min- ... | 1989 | 2715454 |
| control of plasma arginine vasotocin in kelp gulls (larus dominicanus): roles of osmolality, volume, and plasma angiotensin ii. | the physiological roles of plasma osmolality, volume, and angiotensin ii (aii) in the control of plasma arginine vasotocin (avt) have been evaluated in the kelp gull. plasma avt (measured by radioimmunoassay) consistently followed the changes in plasma osmolality induced by dehydration, intravenous (iv) infusion of hypertonic saline, or iv infusion of hypotonic glucose solution. osmoreceptor control of avt was further characterized by the stimulatory effect of iv hypertonic mannitol but lack of ... | 1989 | 2737447 |
| plasma arginine vasotocin and angiotensin ii in the water deprived kelp gull (larus dominicanus), cape gannet (sula capensis) and jackass penguin (spheniscus demersus). | 1. the basal levels of the osmoregulatory hormones, arginine vasotocin (avt) and angiotensin ii (aii) were measured (by radioimmunoassay) in the plasma of conscious kelp gulls, cape gannets and jackass penguins. 2. the responses of the hormones to similar degrees of hypertonicity and hypovolemia caused by water deprivation have also been determined. 3. dehydration elevated plasma avt and plasma aii in all three species. 4. the avt concentration was increased by 2-4 fold and although in each case ... | 1988 | 2907438 |
| glomerular filtration changes during vasotocin-induced antidiuresis in kelp gulls. | in conscious kelp gulls, intravenous infusion of arginine vasotocin (avt) at rates of 0.03, 0.1, 0.3, and 1.0 ng.kg-1.min-1 resulted in a linear relationship between the log values of the avt plasma concentrations (measured by radioimmunoassay) and the infusion rates, which indicated a plasma clearance rate for avt of 15.4 ml.min-1.kg-1 when endogenous avt formation is considered. evaluation of the renal actions of avt at each dose level showed that antidiuresis was consistently associated with ... | 1988 | 3202226 |
| schistosome infection in the kelp gull, larus dominicanus, from port elizabeth, republic of south africa. | a schistosome infection, cf gigantobilharzia sp., is recorded from a south african coastal bird, larus dominicanus, for the first time. the histological response to the presence of the worms and their eggs was considered to be unusually mild. these eggs were all immature and were found only in the mucosa of the gut wall. this raises questions about the oviposition behaviour of the female worm. | 1986 | 3734398 |
| eulimdana rauschorum n. sp., a filarioid nematode (lemdaninae) from larus dominicanus in antarctica, with comments on evolution and biogeography. | eulimdana rauschorum n. sp. is described from southern black-backed gulls, larus dominicanus lichtenstein in antarctica. the species is most similar to eulimdana lari (yamaguti, 1935) from charadriiformes in the holarctic. males have spicules equal in length that are asymmetric in structure distally. there are 4-5 and 3-5 caudal papillae in rows to the right and left of the anus, and 2 small genital papillae at the posterolateral margin of the anus. females have a variable number of prominent ca ... | 1986 | 3806323 |
| [paramonostomum antarcticum (trematoda, notocotylidae) in larus dominicanus from south shetlands (antarctica)]. | paramonostomum antarcticum graefe, 1968 from the rectum of blackbacked gull from king george as island (south shetlands, antarctica) is described. as a result of that larus dominicanus is presented the new host of this trematode. the morphology is compared with the original description of p. signiense jones & williams, 1969. the relations between the two possibly identical antarctic species are discussed. it is proposed to invalidate the subgenus paramonostomoides yamaguti, 1971. | 1982 | 7149331 |
| researches on pseudophyllidea (carus, 1813) in the south of chile. iv occurrence of diphyllobothrium dendriticum (nitzch). | experimental infections were established with diphyllobothrium sp. plerocercoids obtained from salmo gairdneri, a fish introduced at the beginning of the 1900s in the lake region of chile. these permitted us to obtain adult parasites in larus dominicanus and canis familiaris. the histological features of the plerocercoids, their relation to the host, adult pattern and susceptibility of hosts allowed us to determine the presence of diphyllobothrium dendriticum (nitzch) for the first time in south ... | 1981 | 7276504 |
| [helminth parasites of larus dominicanus in argentinian patagonia]. | the presence of 9 endohelminths was quoted for larus dominicanus of which 6 were new citations in patagonia (argentina) for this host: stephanoprora, cryptocotyle, anomotaenia, polymorphus, contracaecum and capillaria. for the first time cryptocotile is being cited in argentina. | 1997 | 9497540 |
| nondestructive biomarkers of exposure to endocrine disrupting chemicals in endangered species of wildlife. | this paper explores the problem of endocrine disrupting chemicals (edcs) from the ecotoxicological point of view, focusing on nondestructive biomarkers of exposure to edcs for risk assessment of endangered species of wildlife. several edcs, such as polyhalogenated aromatic hydrocarbons and toxic metals, tend to be biomagnified in the terrestrial and particularly the marine food chains. top predators tend to accumulate high concentrations of these contaminants which places them in a situation of ... | 1999 | 10467722 |
| co-occurrence of pectinospirura argentata wehr, 1933, skrjabinoclava andersoni n. sp. and larvae (nematoda: acuariidae) in the proventriculus of larus dominicanus lichtenstein (aves: laridae), with notes on their attachment. | pectinospirura argentata wehr, 1933, skrjabinoclava andersoni n. sp. and acuariid larvae, collected from the proventriculus of the kelp gull larus dominicanus from coastal buenos aires, argentina, are described. this is the first record of the genus pectinospirura wehr, 1933 from south america and from the kelp gull. the measurements of both sexes are given because there are some differences with previously described specimens of p. argentata; the male is smaller with smaller spicules and the fe ... | 1999 | 10613538 |
| a new species of sciadiocara skrjabin, 1916 (nematoda: acuariidae) parasitic in shorebirds in argentina. | in the present paper we describe a new species of the genus sciadiocara from haematopus palliatus from the mar chiquita coastal lagoon (37 degrees 46' s, 57 degrees 27' w), argentina. we provide two host records (h. palliatus and larus dominicanus) for the genus, both from buenos aires province, argentina. s. haematopodi n. sp. closely resembles s. legendrei petter, 1967. the new species can be distinguished by the morphology of the distal end of the left spicule, the shorter length of the right ... | 1999 | 10613539 |
| morphological studies of ancyracanthopsis winegardi wong & anderson, 1990 (nematoda: acuarioidea) and larval stages of acuariid nematodes parasitic in larus dominicanus lichtenstein (aves: laridae) from argentina. | ancyracanthopsis winegardi wong & anderson, 1990 (nematoda: acuarioidea) is described from larus dominicanus lichtenstein (aves: laridae) on the southwest atlantic coast (38 degrees 42 minutes s, 59 degrees 47 minutes w). the main character used to distinguish species of ancyracanthopsis is the morphology of the ptilina. thus, although the specimens described here have some differences in the morphology and size of the spicules and in the female genitalia, they were referred to a. winegardi beca ... | 2000 | 10743857 |
| wardium paucispinosum sp. n. (eucestoda: hymenolepididae), parasite of larus maculipennis (aves: laridae) in mar del plata, argentina; with comments on wardium semiductilis (szidat, 1964) comb. n. | a new species wardium paucispinosum (eucestoda: hymenolepididae) parasite from the intestine of larus maculipennis (lichtenstein) from mar del plata, argentina is described. the distinctive features of the new species are: strobilar length 52.8 mm; 10 aploparaksoid rostellar hooks, 14 (12-17) microm long; ratio between cirrus pouch length and mature proglottid width (cpl/mpw) 0.38 (0.27-0.50); regular cylindrical evaginated cirrus, 90 x 10 microm, with distal end without spines and proximal and ... | 2000 | 11104148 |
| porphyrin levels in excreta of sea birds of the chilean coasts as nondestructive biomarker of exposure to environmental pollutants. | in this preliminary study on sea birds we propose the use of porphyrins in excreta as a biomarker of exposure to contaminants. samples of excreta were obtained from colonies of brown pelicans (pelecanus occidentalis thagus), neotropic cormorants (phalacrocorax olivaceus), and kelp gulls (larus dominicanus) in three areas of the south coast of chile with different human impact (tubul, talcahuano, and valdivia). they were analyzed for porphyrin content (copro-, uro-, and protoporphyrins and total ... | 2001 | 11385591 |
| bartolius pierrei n. g., n. sp. (digenea: gymnophallidae) from the península valdés, argentina. | bartolius pierrei n. g., n. sp. (digenea: gymnophallidae) is described from metacercariae and naturally and cultivated obtained adults from southern argentina. the second intermediate host is darina solenoides (king) (bivalvia: mactridae) and the definitive host is larus dominicanus lichtenstein (aves: laridae). the diagnostic characters are as follows: body small, oval. oral sucker without lateral projections, twice size of ventral sucker (except in young metacercariae). caeca short (in adults) ... | 2001 | 11389335 |
| metal levels in feathers of cormorants, flamingos and gulls from the coast of namibia in southern africa. | arsenic, cadmium, chromium, lead, manganese, mercury, selemium, and tin concentrations were measured in the feathers of cape cormorant (phalacrocorax capensis), hartlaub's gull (larus hartlaubii), kelp gull (larus dominicanus), and lesser flamingo (phoeniconaias minor) from the coast of namibia in southern africa. metal concentrations in feathers represent the concentrations in the blood supply at the time of feather formation. cape cormorants are piscivores; kelp gulls are primarily piscivores; ... | 2001 | 11465667 |
| assessment of risks of brodifacoum to non-target birds and mammals in new zealand. | the risks to non-target birds and other wildlife from the use of vertebrate pesticides, including anticoagulant rodenticides, are determined to a significant extent by species' intrinsic susceptibility, and the toxicokinetics of the compounds used. brodifacoum is highly toxic to birds and mammals. the acute toxicity of brodifacoum to birds in new zealand varies from <1 mg/kg in pukeko (porphyrio p. melanotus), the native swamp hen, to >20 mg/kg in the paradise shelduck (tadorna variegata). like ... | 2002 | 11898799 |
| seabird eggs as bioindicators of chemical contamination in chile. | seabird eggs were used as bioindicators of chemical contamination in chile. brown-hooded gull (larus maculipennis), kelp gull (larus dominicanus), trudeau's tern (sterna trudeaui), neotropic cormorant (phalacrocorax brasilianus), and pink-footed shearwater (puffinus creatopus) eggs were sampled at different breeding sites during the 1990s. mercury and organochlorines (pcbs, ddt, hcb, hch, and pcp) were quantified to reveal the interspecific differences, spatial and temporal trends in contaminati ... | 2003 | 12860109 |
| fish waste as an alternative resource for gulls along the patagonian coast: availability, use, and potential consequences. | we evaluated the volumes of waste from fish processing plants in chubut province, argentina, and discuss its potential consequences for kelp gull (larus dominicanus) population dynamics and coastal management. mean volume of waste produced between 1989 and 2001 in three coastal cities was 49.8+/-10.9 thousand tonsy(-1). the amount of waste varied between years and cities, being larger at puerto madryn and comodoro rivadavia than at rawson (24.1, 19.3 and 6.4 thousand tonsy(-1), respectively). wa ... | 2004 | 15041434 |
| himasthla escamosa n. sp. (digenea: echinostomatidae) from the kelp gull, larus dominicanus (charadriiformes: laridae), on the patagonian coast, argentina. | in this article, we describe a new species of himasthla dietz, 1909 (digenea: echinostomatidae) from larus dominicanus lichtenstein (aves: laridae) in northern patagonia, argentina. we also describe the hosts, localities, and key diagnostic features and the measurements of the so far 25 described species. of these species. himasthla militaris, h. leptosoma, h. elongata, h. secunda, h. megacotyla, h. multilecithosa, h. piscicola, h. compacta, h. schachtachtinskoi, h. littorinae, h. continua, h. a ... | 2004 | 15165053 |
| salmonella brandenburg - emergence of a new strain affecting stock and humans in the south island of new zealand. | to report information on the spread of a new strain of salmonella brandenburg, which affected livestock and humans in the south island of new zealand, and a series of small case studies designed to investigate potential transmission of infection. | 2004 | 15768079 |
| outbreaks of avian cholera in hope bay, antarctica. | during austral summers 1999-2000 and 2000-01, two outbreaks of avian cholera occurred in the hope bay area (63 degrees 24's, 56 degrees 59'w), located on the tip of the antarctic peninsula. eighty-six dead birds were found: five kelp gulls (larus dominicanus), 36 skuas (stercorarius sp.), and 45 adelie penguins (pygoscelis adeliae). the carcasses were studied using clinical, pathological, and microbiological criteria. water samples from ponds where birds were settled and samples from 90 healthy ... | 2006 | 16870848 |
| relationship between the contamination of gulls (larus dominicanus) and oysters (crassostrea gigas) with salmonella serovar typhimurium by pcr-rflp. | shellfish can bioaccumulate in their tissues pathogenic contaminants present in water and they have been related with several outbreaks of food-borne diseases worldwide. with their increased population in urban areas, gulls have been reported as an important source of water environment contamination. during a 10-month period, water, gulls feces and oyster samples were collected in a shellfish harvesting site and analyzed for total and fecal coliform counts (water) and salmonella presence (gull f ... | 2007 | 17616869 |
| hepatic cytochrome p450 activity and pollutant concentrations in paradise shelducks and southern black-backed gulls in the south island of new zealand. | cytochrome p450 (cyp) enzymes catalyse the oxidative metabolism of various xenobiotics including environmental pollutants. we investigated liver microsomal cyp marker activities in 60 paradise shelducks (tadorna variegata; herbivore) and 77 southern black-backed gulls (larus dominicanus; omnivore) collected at three sites with putatively different levels of pollution in the south island of new zealand. ethoxyresorufin o-deethylase (erod) activity was high in birds at an urban landfill site compa ... | 2008 | 18473165 |
| avian influenza virus isolated in wild waterfowl in argentina: evidence of a potentially unique phylogenetic lineage in south america. | avian influenza (ai) viruses have been sporadically isolated in south america. the most recent reports are from an outbreak in commercial poultry in chile in 2002 and its putative ancestor from a wild bird in bolivia in 2001. extensive surveillance in wild birds was carried out in argentina during 2006-2007. using rrt-pcr, 12 ai positive detections were made from cloacal swabs. one of those positive samples yielded an ai virus isolated from a wild kelp gull (larus dominicanus) captured in the so ... | 2008 | 18632129 |
| assessment of trace metal concentration in feathers of seabird (larus dominicanus) sampled in the florianópolis, sc, brazilian coast. | cd, co, cr, cu, mn, ni, zn, and pb were measured in feather samples of adult, subadult, and juvenile of larus dominicanus, sampled in the florianólis, sc, in the south of brazil in december 2005, by flame atomic absorption spectrophotometry. the average of the distribution of cd concentration in adult feathers (0.072 microg g(-1)) was significantly different than that found in juvenile feathers (0.021 microg g(-1)). cu concentration averages were not significantly different between adults (13.30 ... | 2010 | 19856122 |
| development from metacercaria to adult of a new species of maritrema (digenea: microphallidae) parasitic in the kelp gull, larus dominicanus , from the patagonian coast, argentina. | maritrema madrynensis n. sp. is described from the patagonian coast, argentina, based on naturally obtained adults from the kelp gull larus dominicanus and cultured metacercariae from the crab cyrtograpsus altimanus . the new species fits into the "eroliae complex" and can be distinguished from other related species mainly in shape, size, and distribution of the spines on the cirrus and vitellarium in a complete ring in all specimens. based on morphological and morphometric features of the natur ... | 2010 | 20496960 |
| uvs is rare in seabirds. | ultraviolet-sensitive vision (uvs), believed to have evolved from an ancestral state of violet-sensitive vision (vs), is widespread among terrestrial birds, where it is thought to play a role in orientation, foraging, and sexual selection. less is known, however, about the distribution and significance of uvs in seabirds. to date uvs has been definitively demonstrated only in two families (laridae and sternidae), although indirect evidence has been used to argue for a more widespread occurrence. ... | 2011 | 21527267 |
| helminths of the kelp gull, larus dominicanus, from the northern patagonian coast. | the helminth community of larus dominicanus (charadriiformes) is reported from península valdés, on the patagonian coast, argentina. from march 2000 to april 2004, 29 kelp gulls were collected and dissected. all the birds were parasitized by at least 2 of 18 parasite species: 2 cestodes (1 tetrabothriidae, 1 dilepididae), 10 trematodes (2 echinostomatidae, 3 microphallidae, 2 gymnophallidae, 1 philophthalmidae, 1 dicrocoeliidae, 1 diplostomatidae), 4 nematodes (2 acuariidae, 1 capillaridae, 1 an ... | 2011 | 21556688 |
| development of new nuclear markers and characterization of single nucleotide polymorphisms in kelp gull (larus dominicanus). | the present study seeks to develop nuclear markers for the kelp gull (larus dominicanus). we hereby report the characterization of 12 independent nuclear introns, where 104 single nucleotide polymorphisms (snps) in 8138 sequenced base pairs were observed. these snp markers are the first to be designed for genotyping a gull species. the markers will provide useful tools for understanding which processes act or acted upon kelp gulls to cause their low genetic variability in mitochondrial dna. in a ... | 2009 | 21564861 |
| community structure of lice (insecta: phthiraptera) from two sympatric gull species: kelp gull (larus dominicanus) and franklin's gull (larus pipixcan) in talcahuano, chile. | a total of 1,177 lice of four species were collected from 124 kelp gulls (larus dominicanus) and 137 lice of the same four species from 60 franklin's gulls (larus pipixcan). the louse saemundssonia lari (o fabricius) (phthiraptera: philopteridae) was the most numerous on both gull species, with infestation rates of 4.9 on kelp gulls and 1.8 on franklin's gulls. the second most abundant louse was quadraceps punctatus (burmeister), with a high infestation rate but low prevalence on kelp gulls; tho ... | 2011 | 21710024 |
| induction of in vitro erod activity and in vivo caffeine metabolism in two species of new zealand birds. | in birds, induction of cytochrome p4501a (cyp1a) is usually assessed as liver microsomal ethoxyresorufin o-deethylase (erod) activity, but in mammals, it can be determined by a caffeine metabolism blood test. we investigated both of these measures in two species of new zealand birds. administration of a model cyp1a inducer, +¦-naphthoflavone (bnf) (80mg/kg i.p. twice 2 days apart), to paradise shelducks (tadorna variegata; herbivore) and southern black-backed gulls (larus dominicanus; omnivore) ... | 2008 | 21783874 |
| [detection of salmonella and mycobacterium species in seagulls captured in talcahuano, chile]. | salmonella can be isolated from the feces of seagulls. therefore these birds can be a vector for dissemination of this pathogen. | 2011 | 22446658 |
| a survey for avian influenza from gulls on the coasts of the district of pinamar and the lagoon salada grande, general madariaga, argentina. | in the present study, fecal samples obtained from kelp gulls (larus dominicanus), brown-hooded gulls (larus maculipennis), and olrog's gulls (larus atlanticus) on the coast of the district of pinamar, and grey-hooded gulls (larus cirrocephalus) on the coast of the lagoon salada grande and surrounding wetlands, general madariaga, buenos aires province, argentina, were tested for evidence of avian influenza virus over a period of 3 yr. this surveillance in free-living wild birds in the buenos aire ... | 2012 | 23402129 |
| genetic variability in mitochondrial and nuclear genes of larus dominicanus (charadriiformes, laridae) from the brazilian coast. | several phylogeographic studies of seabirds have documented low genetic diversity that has been attributed to bottleneck events or individual capacity for dispersal. few studies have been done in seabirds on the brazilian coast and all have shown low genetic differentiation on a wide geographic scale. the kelp gull is a common species with a wide distribution in the southern hemisphere. in this study, we used mitochondrial and nuclear markers to examine the genetic variability of kelp gull popul ... | 2012 | 23271950 |
| erysipelothrix rhusiopathiae isolated from gull-inflicted wounds in southern right whale calves. | southern right whales eubalaena australis from peninsula valdés, argentina, show wounds produced by kelp gulls larus dominicanus that feed on the whales' dorsal skin and blubber. during the 2013 whale season, several calves were reported showing kelp gull injuries with a swollen area surrounded by rhomboid-shaped raised edges. samples from 9 calves were taken in order to establish the etiology of these rhomboid-shaped wounds; 2 calves (one living, one dead) showed gull-inflicted injuries with rh ... | 2016 | 27596861 |
| molecular characterization of extended-spectrum-cephalosporin-resistant enterobacteriaceae from wild kelp gulls in south america. | extended-spectrum-cephalosporin-resistant enterobacteriaceae are a public health concern due to limited treatment options. here, we report on the occurrence and the molecular characteristics of extended-spectrum-cephalosporin-resistant enterobacteriaceae recovered from wild birds (kelp gulls). our results revealed kelp gulls as a reservoir of various extended-spectrum cephalosporinase genes associated with different genetic platforms. in addition, we report for the first time the presence of a k ... | 2016 | 27572403 |
| preliminary assessment of contaminants in the sediment and organisms of the swartkops estuary, south africa. | urban estuaries are susceptible to metal and organic pollution, yet most remain understudied in south africa with respect to the presence, concentrations and distribution of contaminants. metal and organic chemical concentrations were assessed in sediment and organisms from different trophic levels in the lower reaches of the swartkops estuary. species sampled included upogebia africana (malacostraca: upogebiidae), gilchristella aestuaria (clupeidae), psammogobius knysnaensis (gobiidae), mugil c ... | 2015 | 26593278 |
| reproductive success of south american terns (sterna hirundinacea) from cardos islands, florianópolis, sc, brazil. | sterna hirundinacea (lesson, 1831) is a migratory seabird that breeds in the pacific coast (from peru to chile) and along the atlantic coast of south america from espírito santo (brazil) to terra del fuego (argentina). this paper describes the reproductive success of south american terns on cardos island, florianopolis, brazil in the breeding seasons of 2003, 2005 and 2006. the colony was formed in mid-may in 2003 and early april in other years, with the total number of nests ranging from 1,852 ... | 2012 | 22499260 |
| the phylogeny and life cycle of two species of profilicollis (acanthocephala: polymorphidae) in marine hosts off the pacific coast of chile. | resolving complex life cycles of parasites is a major goal of parasitological research. the aim of this study was to analyse the life cycle of two species of the genus profilicollis, the taxonomy of which is still unstable and life cycles unclear. we extracted individuals of profilicollis from two species of crustaceans (intermediate hosts) and four species of seagulls (definitive hosts) from sandy-shore and estuarine habitats along the south-east pacific coast of chile. mitochondrial dna analys ... | 2016 | 27667136 |
| correction: increased wounding of southern right whale (eubalaena australis) calves by kelp gulls (larus dominicanus) at península valdés, argentina. | | 2015 | 26555432 |
| increased wounding of southern right whale (eubalaena australis) calves by kelp gulls (larus dominicanus) at península valdés, argentina. | at least 626 southern right whale (eubalaena australis) calves died at the península valdés calving ground, argentina, between 2003 and 2014. intense gull harassment may have contributed to these deaths. in the 1970s, kelp gulls (larus dominicanus) began feeding on skin and blubber pecked from the backs of living right whales at valdés. the frequency of gull attacks has increased dramatically over the last three decades and mother-calf pairs are the primary targets. pairs attacked by gulls spend ... | 2015 | 26488493 |
| reproductive dynamics of sterna hirundinacea lesson, 1831 in ilha dos cardos, santa catarina, brazil. | in this work, we intend to describe the reproductive dynamics of sterna hirundinacea in an island from south brazil. we studied the reproductive biology of this species in its natural environment and provide data on their growth, survival, and reproductive success in ilha dos cardos, santa catarina, south brazil. samplings were carried out daily on the island throughout the reproductive seasons of 2003, 2005, and 2006 and the different stages of development of the chicks were characterized accor ... | 2014 | 24977100 |
| description of maritrema formicae sp. nov. (digenea, microphallidae) parasitic in the kelp gull, larus dominicanus, from the patagonian coast, argentina. | maritrema formicae sp. nov. is described from the patagonian coast, argentina, based on adults obtained from the kelp gull, larus dominicanus. the new species fits with the "eroliae complex" and can be distinguished from other related species mainly in shape and size of body, shape, size, and pattern of distribution of cirrus spines, uterus extension, number and size of eggs, vitellarium in a complete ring in all specimens, and its neotropical distribution. the new species is sympatric with anot ... | 2012 | 22807050 |
| kelp gulls larus dominicanus as predators in kelp macrocystis pyrifera beds. | minimum daily consumption of bivalves gaimardia sp by kelp gulls in a macrocystis kelp bed at porvenir, tierra del fuego, was calculated to be ca. 525 000 individuals, corresponding to an energy removal of ca. 21 kj·m(-2)·d(-1). this is far in excess of energy removal by any other higher-trophic-level predator in southern chilean macrocystis beds, but previous work has ignored kelp gulls as a component of the kelp bed community. | 1988 | 28312393 |
| kelp and dolphin gulls cause perineal wounds in south american fur seal pups (arctocephalus australis) at guafo island, chilean patagonia. | during five reproductive seasons, we documented the presence, extent and origin of perineal wounds in south american fur seal pups (arctocephalus australis) on guafo island, northern chilean patagonia. the seasonal prevalence of perineal wounds ranged from 5 to 9%, and new cases were more common at the end of the breeding season (february), when pups were on average two months old and were actively expelling hookworms (uncinaria sp). histologically, wounds corresponded to marked ulcerative lymph ... | 2017 | 28791178 |
| seabirds (laridae) as a source of campylobacter spp., salmonella spp. and antimicrobial resistance in south africa. | zoonotic thermophilic campylobacter and nontyphoidal salmonella enterica are a major cause of foodborne human gastroenteritis worldwide. there is little information about reservoirs of these zoonotic agents in africa. thus, chicks of kelp gulls (larus dominicanus, n=129) and greater crested terns (thalasseus bergii, n=100) were studied at five colonies on the western cape coast (south africa) during summer 2013/2014. campylobacter spp. occurrence was 14.0% (ci95% : 9.9-19.3), with c. jejuni the ... | 2017 | 28752962 |
| anthropogenic debris in the nests of kelp gulls in south africa. | anthropogenic debris results in detrimental interactions with many marine species. several seabirds include debris items in their nests, which can lead to entanglement of chicks and adults, resulting in injury or death. anthropogenic debris was found in 4-67% of kelp gull larus dominicanus nests in seven colonies in the western cape, south africa. nests contained two types of litter: items included in the nest structure during construction (mainly ropes and straps), and regurgitated items (mainl ... | 2017 | 28341155 |
| 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 |
| phylogenetic placement of a schistosome from an unusual marine snail host, the false limpet (siphonaria lessoni) and gulls (larus dominicanus) from argentina with a brief review of marine schistosomes from snails. | in the blood fluke family schistosomatidae, marine snails are well known as intermediate hosts. eight families of marine snails have thus far been reported to host schistosomes across the world, most of which have been implicated in human cercarial dermatitis (hcd) outbreaks. as part of our larger effort to define the species diversity and biology of schistosomes in argentina, in particular their role in causing hcd, we searched in the marine pulmonate snail (siphonaria lessoni) for a schistosom ... | 2017 | 27611734 |
| plastic ingestion by a generalist seabird on the coast of uruguay. | we analyzed plastic ingestion by kelp gull (larus dominicanus) from 806 pellets collected between 2011 and 2013. employing a raman spectroscopy, we characterized those polymers used to produce the plastics ingested. debris was recorded in 143 pellets (%fo=17.7%, n=202, 92.58g). plastic was found in 119 pellets (%fo=83%) and non-plastic occurred in 56 pellets (%fo=39%). the most important debris category was plastic film with 55.3% (n=79). plastic bags were observed in 19 pellets (%fo=2.4%, weigh ... | 2016 | 27098991 |
| hematologic and biochemical parameters of kelp gulls (larus dominicanus) captured in the city of talcahuano, chile. | in order to provide tools for future health-based monitoring programs, we developed reference intervals for hematology and plasma biochemistry and partitioned data for sex and season (winter and autumn). ninety-one physically healthy kelp gulls (larus dominicanus) were sampled in the city of talcahuano, chile, during winter (july-september) of 2007, autumn (april-june) and winter of 2008, and autumn of 2009. after blood sampling, the kelp gulls were euthanized by cervical dislocation. packed cel ... | 2015 | 26352947 |
| kelp gulls (larus dominicanus) killed and injured by discarded monofilament lines at a marine recreational fishery in northern patagonia. | among marine debris, monofilament fishing lines often result in negative impacts on marine organisms. we characterized marine debris and incidence of lost and discarded monofilament lines along beaches used by recreational fishers, and report the impact of lines on kelp gulls (larus dominicanus) at the bahía san blas protected area, site of one of the main shore-based recreational fisheries of the southwestern atlantic. over 55% of the marine debris recorded originated from recreational fishing ... | 2014 | 24951250 |
| evidence for kelp gulls (larus dominicanus) and franklin's gulls (leucophaeus pipixcan) as carriers of salmonella by real-time polymerase chain reaction. | polymerase chain reaction confirmed that two gull species in talcahuano, chile, shed salmonella. fecal samples from resident larus dominicanus had prevalences of 51.2% for salmonella spp. and 26.3% for salmonella enteritidis. prevalences in samples from migratory leucophaeus pipixcan were 75% and 30% respectively. risks to public health may exist. | 2012 | 23060519 |
| circovirus-like infection in a southern black-backed gull (larus dominicanus). | a juvenile black-backed gull (larus dominicanus) from the manawatu region of new zealand was found to have chronic airsacculitis due to aspergillus spp. histologically, there was moderately severe inflammation in the bursa of fabricius associated with large, basophilic, intracytoplasmic inclusions, which ultrastructurally had an appearance typical of circovirus inclusions. this finding suggests that circoviruses may be more widespread in avian species than previously recognized and may be respon ... | 1999 | 26911607 |
| comparing the metallic elemental compositions of kelp gull larus dominicanus eggs and eggshells from the swartkops estuary, port elizabeth, south africa. | metals attributed to pollution may increase their concentrations above the geological background and pose toxic challenges towards humans and biota. we analysed sixteen kelp gull eggs and eggshells for 30 metallic elements from the swartkops estuary (se), an important recreational, industrial, and ecological asset for port elizabeth, the region, and south africa. mean concentrations for eggshell and egg content for hg was 0.02 and 0.4 mg/kg dm, cr was 4 and 18 mg/kg dm (the highest yet recorded ... | 2019 | 30660910 |
| seabird and pinniped shape soil bacterial communities of their settlements in cape shirreff, antarctica. | seabirds and pinnipeds play an important role in biogeochemical cycling by transferring nutrients from aquatic to terrestrial environments. indeed, soils rich in animal depositions have generally high organic carbon, nitrogen and phosphorus contents. several studies have assessed bacterial diversity in antarctic soils influenced by marine animals; however most have been conducted in areas with significant human impact. thus, we chose cape shirreff, livingston island, an antarctic specially prote ... | 2019 | 30625192 |
| occurrence of yersinia rohdei among feral reindeer (rangifer t. tarandus) and kelp gulls (larus dominicanus) on the sub-antarctic island south georgia. | introduction: during a research expedition in 2012, faecal samples were collected from feral reindeer and kelp gulls on the main island of south georgia in the sub-antarctic region of the atlantic. the samples were analysed for bacteria of the genus yersinia with the aim of identifying isolates to the species level. materials and methods: a total of 11 reindeer samples and 26 kelp gull samples were retrieved from the location of stromness, kept refrigerated and cultivated for gram-negative bacte ... | 2018 | 31105907 |
| a new species of cryptocotyle (digenea: heterophyidae) infecting kelp gull and a galaxiid fish in patagonian freshwater environments: morphological and molecular analyses. | adults of a species of cryptocotyle were found infecting the intestine of the kelp gull, larus dominicanus lichtenstein, 1823, and metacercariae were found in the fins and muscle of the galaxiid fish, galaxias platei steindachner, 1898 (local name "puyen grande"), in nahuel huapi national park (patagonia). morphometrics and genetic markers of mitochondrial cytochrome oxidase (coi) and ribosomal internal transcribed spacer 1 (its1) confirmed that adults and metacercariae were conspecific and repr ... | 2020 | 32164027 |
| galactosomum otepotiense n. sp. (trematoda: heterophyidae) infecting four different species of fish-eating birds in new zealand: genetically identical but morphologically variable. | trematodes of the genus galactosomum are cosmopolitan parasites that infect the intestines of fish-eating birds and mammals. adults of named galactosomum species have not been recorded from bird hosts in new zealand, despite their cercarial stage being known from various studies of the first intermediate host, zeacumantus subcarinatus. here we describe a new species of galactosomum infecting four different piscivorous birds in new zealand: caspian terns, red-billed and black-backed gulls and lit ... | 2019 | 31500672 |
| occurrence, distribution, and bioaccumulation of new and legacy persistent organic pollutants in an ecosystem on king george island, maritime antarctica. | the occurrence and bioaccumulation of new and legacy persistent organic pollutants (pops), organochlorine pesticides (ocps), polychlorinated biphenyls (pcbs), polychlorinated naphthalenes (pcns), hexabromocyclododecanes (hbcds), and dechlorane plus (dps) and their related compounds (dechloranes) in an ecosystem on king george island, antarctica are investigated. the new and legacy pops were widely detected in the animal samples collected from antarctica, which included limpet, antarctic cod, amp ... | 2020 | 33087285 |
| foraging movements of breeding kelp gulls in south africa. | kelp gulls larus dominicanus are one of the most abundant gulls in the southern hemisphere and can play an important role in their ecosystem. understanding their foraging ecology is therefore important, especially in the context of anthropogenic changes of the environment. over 35,000 kelp gulls breed in south africa but little is known about their habitat use. it has been hypothesised that foraging mainly occurs in natural habitats while provisioning chicks to ensure high quality food, but know ... | 2020 | 32905351 |
| retrospective analysis of the lifetime endocrine response of southern right whale calves to gull wounding and harassment: a baleen hormone approach. | physiological measurements are informative in assessing the relative importance of stressors that potentially impact the health of wildlife. kelp gulls, larus dominicanus (kg), resident to the region of península valdés, argentina, have developed a unique behavior of landing on the backs of southern right whale adults and calves, eubalaena australis (srw), where they feed on their skin and blubber. this parasitic behavior results in large open wounds on the dorsal surface of the whale. coinciden ... | 2020 | 32540491 |
| patterns of plastic ingestion in kelp gull (larus dominicanus) populations breeding in northern patagonia, argentina. | human waste is a global concern, and volumes are growing rapidly. for opportunistic species, like many birds, urban waste offers alternative food which in turn may lead to plastic ingestion with potential negative effects. we assessed the incidence of plastics and other marine debris in breeding kelp gull (larus dominicanus) diet at nine colonies located along ~2400 km of coastline from southern buenos aires to southern chubut, argentina, using regurgitated pellets (n = 2355) and chick stomach c ... | 2020 | 32510384 |
| the impact of anthropogenic food subsidies on a generalist seabird during nestling growth. | anthropogenic food subsidies, such as refuse, are an important driver of animal population changes and gulls heavily forage on this food source. foraging on refuse during the rearing period could affect the acquisition of resources with potential demographic consequences. using conventional diet analysis and stable isotopes of δ13c and δ15n of blood of kelp gull (larus dominicanus) nestlings, we studied the variation of the chick growth in response to foraging on refuse on a reproductive colony ... | 2019 | 31216509 |
| morphology and molecules resolve the identity and life cycle of an eye trematode, philophthalmus attenuatus n. sp. (trematoda: philophthalmidae) infecting gulls in new zealand. | trematodes of the genus philophthalmus are cosmopolitan parasites that infect the eyes of birds and mammals. they have the potential to affect the survival of their hosts and a few cases of human philophthalmiasis have occurred worldwide. adults of known philophthalmus species have never been recorded from bird hosts in new zealand, despite their cercarial stage being a focus of various studies. here, we describe a new species of philophthalmus infecting new zealand red-billed and black-backed g ... | 2019 | 30859312 |
| cestodes of the genus tetrabothrius (tetrabothridea: tetrabothriidae) from antarctic flying seabirds | four species of the genus tetrabothrius were reported from three species of antarctic flying seabirds. there were: tetrabothrius (culmenamniculus) gracilis nybelin, 1916 and tetrabothrius (oriana) minutus szpotańska, 1917 from macronectes giganteus (gmelin, 1789); tetrabothrius (oriana) filiformis nybelin, 1916 from larus dominicanus lichtenstein, 1823 and tetrabothrius (culmenamniculus) cylindraceus rudolphi, 1849 from stercorarius antarcticus lonnbergi (mathews, 1912). m. giganteus is a new ho ... | 2019 | 32191991 |
| persistent organic pollutants in two species of migratory birds from rothera point, adelaide island, antarctica. | carcasses of south polar skuas (catharacta maccormicki) and kelp gulls (larus dominicanus) were opportunistically collected around of rothera research station (67°35'8″s and 68°7'59″w) during the 2016/2017 austral summer. samples of their tissues (muscle, liver and subcutaneous fat) were analysed for persistent organic pollutants (pops). organochlorine pesticides (ocps) showed the highest concentrations, notably for pp'-dde and hcb. the polychlorinated biphenyls (pcbs)-profiles demonstrated a cl ... | 2018 | 30503416 |
| lifetime glucocorticoid profiles in baleen of right whale calves: potential relationships to chronic stress of repeated wounding by kelp gulls. | baleen tissue accumulates stress hormones (glucocorticoids, gc) as it grows, along with other adrenal, gonadal and thyroid hormones. the hormones are deposited in a linear fashion such that a single plate of baleen allows retrospective assessment and evaluation of long-term trends in the whales' physiological condition. in whale calves, a single piece of baleen contains hormones deposited across the lifespan of the animal, with the tip of the baleen representing prenatally grown baleen. this sug ... | 2018 | 30151197 |
| subcutaneous myxomas in kelp gulls ( larus dominicanus) in chile. | myxomas are an uncommon neoplasm in vertebrates, and are found at a low frequency in birds, both wild and domestic. we report myxomas in two kelp gulls ( larus dominicanus) in chile, identifying tumors in specimens that were received for necropsy. | 2019 | 30040017 |
| life cycle of the parasite profilicollis chasmagnathi (acanthocephala) on the patagonian coast of argentina based on morphological and molecular data. | this study verifies the identity of adult specimens of the parasite profilicollis chasmagnathi (acanthocephala, polymorphidae) recovered from kelp gulls larus dominicanus (aves, laridae), and cystacanths found in crabs cyrtograpsus altimanus (crustacea, decapoda) from the southwestern atlantic coast. the life cycle of this parasite is elucidated in the intertidal zone of patagonia, argentina, based on morphological and molecular data. preferences by size and sex of the intermediate host and seas ... | 2018 | 30016191 |
| 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 |