| essaouira and kala iris: two new orbiviruses of the kemerovo serogroup, chenuda complex, isolated from ornithodoros (alectorobius) maritimus ticks in morocco. | essaouira and kala iris viruses were isolated from ornithodoros (alectorobius) maritimus ticks parasitizing yellow-legged gulls (larus cachinnans) on the coast of morocco in 1979 and 1981, respectively. serological evidence indicates that these two viruses are new members of the chenuda complex within the kemerovo serogroup of the genus orbivirus. ecological, pathological, morphological, and physicochemical properties are compatible with these findings. the infectivity of these viruses for man a ... | 1993 | 8010186 |
| babesia bennetti n. sp. from the yellow-legged gull (larus cachinnans, aves, laridae) on benidorm island, mediterranean sea. | babesia bennetti sp. nov. is described as a new species of piroplasm parasitizing the yellow-legged gull larus cachinnans. this is the first report of babesia for this family of birds. double infections in the erythrocytes were common. the udder cow forms described in babesia peircei also were found in this species. the typical "x" forms are rarely seen, with merozoites commonly found in pairs as tetrads. | 1998 | 9576519 |
| comparative skeletal muscle fibre morphometry among wild birds with different locomotor behaviour. | six muscles of the mallard duck (anas platyrhynchos), the common coot (fulica atra) and the yellow-legged gull (larus cachinnans) were analysed morphometrically, with special emphasis on their functional implications and physiological needs. oxidative fibres always had significantly smaller size than anaerobic fibres, although no differences in the number of capillaries per fibre were found. this resulted in greater capillary counts per unit of fibre area and perimeter in oxidative than anaerobi ... | 1998 | 9643422 |
| occurrence and numbers of bacteriophages and bacterial indicators in faeces of yellow-legged seagull (larus cachinnans). | faeces from feral populations of yellow-legged seagulls from the northern coastal area of catalonia (north-eastern spain) contained variable amounts of faecal coliforms, faecal streptococci, somatic coliphages, f-specific bacteriophages and bacteroides fragilis bacteriophages. occurrence and numbers of bacterial indicators and bacteriophages in the faeces of yellow-legged seagulls are in the ranges described in the faeces of different animals. the ratios between numbers of bacterial indicators a ... | 1999 | 10664987 |
| detour behaviour in three species of birds: quails (coturnix sp.), herring gulls (larus cachinnans) and canaries (serinus canaria). | detour behaviour is the ability of an animal to reach a goal stimulus by moving round any interposed obstacle. it has been widely studied and has been proposed as a test of insight learning in several species of mammals, but few data are available in birds. a comparative study in three species of birds, belonging to different eco-ethological niches, allows a better understanding of the cognitive mechanism of such detour behaviour. young quails (coturnix sp.), herring gulls (larus cachinnans) and ... | 2005 | 15449104 |
| helminth fauna of the yellow-legged gull larus cachinnans in galicia, north-west spain. | thirty-six helminth species were found in 324 gulls examined during june 1994 to february 1996 from different localities of galicia: 25 trematodes (brachylaima sp., brachylecithum microtesticulatum, cardiocephaloides longicollis, cryptocotyle lingua, cryptocotyle concavum, diplostomum spathaceum, echinostephilla virgula, galactosomum phalacrocoracis, gigantobilharzia acotylea, gymnophallus deliciosus, gynaecotyla longiintestinata, himasthla elongata, himasthla quissetensis, knipowitschiatrema ni ... | 2005 | 16336721 |
| aspergillosis in larus cachinnans micaellis: survey of eight cases. | avian aspergillosis is reported in several avian species, with aspergillus fumigatus as the main aetiological agent. predisposing factors such as starvation, thermal stress, migratory stress, primary infectious disease or toxicosis may play a role. eight cases of disseminated aspergillosis in free ranging seagulls sheltered at c.r.u.m.a. (centro recupero uccelli marini e acquatici, livorno, italy) with different clinical histories are presented. the infection was demonstrated by cultural and his ... | 2006 | 16649081 |
| characterization of antimicrobial resistance and class 1 integrons in enterobacteriaceae isolated from mediterranean herring gulls (larus cachinnans). | mediterranean herring gulls (larus cachinnans) were investigated as a possible reservoir of antibiotic resistant bacteria and of cassette-borne resistance genes located in class 1 integrons. two hundred and fourteen isolates of the family enterobacteriaceae were collected from cloacal swabs of 92 chicks captured in a natural reserve in the north east of italy. they showed high percentages of resistance to ampicillin and streptomycin. high percentages of resistance to trimethoprim/sulfamethoxazol ... | 2008 | 18476779 |
| anatomopathological aspects of avian aspergillosis. | aspergillosis is a fungal disease caused by fungi of the genus aspergillus, in particular a. fumigatus and a. flavus. this paper focuses on anatomopathological aspects resulting from a chronic infection from aspergillus spp in the chicken (gallus domesticus), in the herring gull (larus cachinnans micaelli) and in the red-legged partridge (alectoris rufa rufa). microscopically, we observed some histological lesions that are related to the two typical forms of aspergillosis: a deep nodular form, t ... | 2009 | 19189225 |
| antimicrobial resistance and phylogenetic groups in isolates of escherichia coli from seagulls at the berlengas nature reserve. | fifty-three faecal samples from yellow-legged gulls (larus cachinnans) at the berlengas nature reserve in portugal were cultured on levine agar plates not supplemented with antimicrobial agents, and one escherichia coli colony was isolated and identified from each sample. the percentages of resistant isolates for each of the drugs were ampicillin (43.4 per cent), tetracycline (39.6 per cent), nalidixic acid (34.0 per cent), streptomycin (32.1 per cent), trimethoprim-sulfamethoxazole (sxt) (26.4 ... | 2009 | 19648638 |
| proteomic characterization of vana-containing enterococcus recovered from seagulls at the berlengas natural reserve, w portugal. | abstract: | 2010 | 20858227 |
| molecular characterization of antibiotic resistance in enterococci recovered from seagulls (larus cachinnans) representing an environmental health problem. | antimicrobial resistance and the mechanisms implicated were studied in 54 enterococci recovered from 57 seagull fecal samples. almost 78% of the recovered enterococci showed resistance against one or more antibiotics and these isolates were identified to the species level. e. faecium was the most prevalent species (52.4%). high percentages of erythromycin and tetracycline resistances were found among our isolates (95.2%), and lower percentages were identified to other antibiotics. most of the te ... | 2011 | 21674073 |
| genetic affinities within the herring gull larus argentatus assemblage revealed by aflp genotyping. | to date, the taxonomic status of circumpolar breeding populations of the herring gull larus argentatus, the lesser black-backed gull larus fuscus, and the closely related yellow-legged gull larus cachinnans has been based on differences or similarities in phenotype, morphology, and feeding and premating behavior. to shed some new light on the many taxonomic uncertainties surrounding these taxa, we describe the results of a large dna study based on comparing the distribution of 209 biallelic mark ... | 2001 | 11139298 |
| persistent organochlorine pollutants in liver of birds of different trophic levels from coastal areas of campania, italy. | liver samples of 12 species of birds of different trophic levels, collected during the period 1998-2000 from coastal areas of the campania region, southern italy, were analyzed for organochlorine pesticides (ocs), such as dichlorodiphenyltrichloroethane (ddt) and its metabolites, hexachlorobenzene (hcb), gamma-hexachlorocycloexane (gamma-hch), aldrin, dieldrin, endrin, and the seven pcb "target" congeners, iupac nos. 28, 52, 101, 118, 138, 153 and 180. p,p'-dde was present in all the samples ana ... | 2003 | 14674594 |
| interspecies differences in mixed function oxidase activity in birds: relationship between feeding habits, detoxication activities and organochlorine accumulation. | the relationship between feeding habits and interspecies differences in the detoxication ability of the mixed function oxidase (mfo) system was investigated in birds. the role of mfo (particularly aldrin epoxidase activity) in the detoxication/bioaccumulation of organochlorines was also investigated. euriphagic (yellow-legged herring gull (larus cachinnans), black-headed gull (larus ridibundus), jackdaw (corvus monedula), magpie (pica pica) and stenophagic (cormorant (phalacrocorax carbo), coot ... | 1995 | 15091496 |
| trophic niche width and overlap of two sympatric gulls in the southwestern mediterranean. | the diets of two potential competitor species, audouin's larus audouinii and yellow-legged gulls larus cachinnans, were examined while they bred at the chafarinas islands during 1993, 1994, and 1995. data were collected during two commercial fishing regimes: (1) trawling and purse seine fisheries, and (2) diurnal trawlers only. since the food supply for the gulls in this area was heavily reliant on the activity of purse seine fisheries, these contrasting situations allowed us to analyze short-te ... | 1997 | 28307378 |
| dioxins, furans and ahh-active pcb congeners in eggs of two gull species from the western mediterranean. | polychlorinated biphenyls, dibenzodioxins and dibenzofurans were analysed in eggs of a protected gull species, the audouin's gull (larus audouinii) and compared to those of the yellow-legged gull (larus cachinnans), both breeding in the western mediterranean (ebro delta and medes islands, respectively). differences in concentrations as well as in congener profiles reflected differences in both habitat and diet of the two species. levels of ahh-active pcb congeners were lower in yellow-legged gul ... | 1995 | 8528648 |
| haldane's rule revisited: do hybrid females have a shorter lifespan? survival of hybrids in a recent contact zone between two large gull species. | haldane's rule predicts that particularly high fitness reduction should affect the heterogametic sex of interspecific hybrids. despite the fact that hybridization is widespread in birds, survival of hybrid individuals is rarely addressed in studies of avian hybrid zones, possibly because of methodological constraints. here, having applied capture-mark-recapture models to an extensive, 19-year-long data set on individually marked birds, we estimate annual survival rates of hybrid individuals in t ... | 2014 | 24820228 |
| speciation with gene flow in the large white-headed gulls: does selection counterbalance introgression? | we investigated the role of selection in generating and maintaining species distinctness in spite of ongoing gene flow, using two zones of secondary contact between large gull species in europe (larus argentatus and larus cachinnans) and north america (larus glaucescens and larus occidentalis). we used the pattern of neutral genetic differentiation at nine microsatellite loci (f(st)) as an indicator of expected changes under neutral processes and compared it with phenotypic differentiation (p(st ... | 2009 | 18813326 |
| molecular and morphological patterns of introgression between two large white-headed gull species in a zone of recent secondary contact. | incomplete reproductive isolation promotes gene flow between diverging taxa. however, any gene encoding for traits involved in the reproductive barriers will be less prone to introgression than neutral markers. comparing introgression rates among loci is thus informative of the number and functions of loci involved in the reproductive barriers. this study aimed at identifying possible mechanisms of restriction to gene flow across a zone of recent secondary contact between larus argentatus and la ... | 2007 | 17651198 |
| genetic differentiation and phylogeography of gulls in the larus cachinnans-fuscus group (aves: charadriiformes). | we studied mitochondrial genetic differentiation among nine taxa of large gulls of the larus cachinnans-fuscus group, which form part of the circumpolar herring gull complex. our primary interest was to see if there were unrecognized gene flow barriers, to what extent mitochondrial genetic population structure conformed to current taxonomic boundaries, and what it might reveal about possible differences in population history. sequences (430 nucleotides) of the hypervariable control region i (hvr ... | 2001 | 11742547 |
| long term monitoring of pollutants in eggs of yellow-legged herring gull from capraia island (tuscan archipelago). | chlorinated hydrocarbons (hexachlorobenzene, lindane, pp'dde, polychlorinated biphenyls) and trace elements (hg, se, cd, pb) were determined in eggs of yellow-legged herring gull (larus cachinnans) collected in an island of the tyrrhenian sea during the period 1981-1986. pcbs levels vary on the average between 30.4μg g(-1) d.w. in 1981 to 56.1 μg g(-1) d.w. in 1983. the capillary chromatograms revealed the presence of about 30 somers of pcbs without significant variations in the eggs of the same ... | 1988 | 24248526 |
| neotypification of larus cachinnans pallas, 1811 (aves: laridae). | | 2013 | 26046213 |
| heritability of resistance to oxidative stress in early life. | oxidative stress has recently been suggested to play an important role in life-history evolution, but little is known about natural variation and heritability of this physiological trait. here, we explore phenotypic variation in resistance to oxidative stress of cross-fostered yellow-legged gull (larus cachinnans) chicks. resistance to oxidative stress was not related to plasma antioxidants at hatching, which are mostly derived from maternal investment into eggs. common environmental effects on ... | 2010 | 20149019 |
| age-dependent changes in plasma biochemistry of yellow-legged gulls (larus cachinnans). | the study of avian plasma chemistry is providing useful reference values for the management of endangered and game species, supporting veterinarians in their diagnostics, and also bringing to light relevant physiological adaptations during periods of food-shortage. age is an important source of variability for plasma chemistry. here i report plasma chemistry of yellow-legged gulls larus cachinnans from different ages, between post-independence and adulthood, a 5-year interval. increase in plasma ... | 2005 | 15936712 |
| organochlorine contaminants in eggs of the yellow-legged gull (larus cachinnans michahellis) in the north eastern mediterranean: is this gull a suitable biomonitor for the region? | levels of eight pcb congeners and thirteen organochlorine pesticides were measured in eggs sampled at four yellow-legged gull colonies from the aegean sea (northeastern mediterranean) in 1997. there were no significant differences among colony areas in the median concentrations in any of the pollutants whereas cluster analyses did not generally reveal reasonable pollution patterns. the maximum concentrations of four congeners were found at kinaros colony and of nine compounds were found at lipso ... | 2003 | 12927495 |
| the effects of testosterone manipulation on the body condition of captive male yellow-legged gulls. | persistently high testosterone levels are believed to be costly to males due to their negative effect on body condition. however, this assumption could not be validated when we analysed birds isolated from all social interactions. the hypothesis was tested on birds kept in isolation in order to analyse the effects of testosterone per se, and thereby exclude the influence of social interactions. adult male yellow-legged gulls (larus cachinnans) were captured, and after a period of adjustment, som ... | 2002 | 11818219 |
| a biochemical study of fasting, subfeeding, and recovery processes in yellow-legged gulls. | an investigation of the effects of fasting, subfeeding, and refeeding on plasma biochemistry was carried out on 22 captive yellow-legged gulls larus cachinnans pallas. these birds showed the same fasting endurance model described in other species, but with an important decrease in glucose plasma concentration and very great differences between individuals when reaching the deterioration limit, suggesting a moderate physiological adaptation to long periods of fasting. a different model was propos ... | 2005 | 11517455 |
| hepatotoxic effect of metallic pollutants on enzyme histochemical activities of yellow-legged gull larus cachinnans michahellis liver. | we studied the hepatotoxic effect of heavy metals (cadmium, mercury, copper) on mg2+ -atpase, nadh diaphorase, succinic dehydrogenase and acid phosphatase of yellow-legged gull liver, using enzyme histochemical methods. the lysosomal enzyme activity of acid phosphatase was increased in all cases. however, the other enzyme activities appeared to be insensitive to the different metallic pollutants and to their respective levels, in contrast with literature experimental data showing plasma membrane ... | 2000 | 11075948 |
| seabirds drive plant species turnover on small mediterranean islands at the expense of native taxa. | the analysis of long-term floristic changes was conducted on nine west-mediterranean limestone islands (size range: 2-95 ha) which have recently undergone a severe demographic explosion in their yellow-legged gull larus cachinnans colonies. a comparison of past and present plant inventories was used to quantify extinction-colonization events, both from a classical biogeographical perspective (per island approach) and a metapopulational perspective (per species approach). in the first approach, f ... | 2000 | 28308294 |
| capillarity and fibre types in locomotory muscles of wild yellow-legged gulls (larus cachinnans). | this study analyzes the capillarity and fibre-type distribution of six locomotory muscles of gulls. the morphological basis and the oxygen supply characteristics of the skeletal muscle of a species with a marked pattern of gliding flight are established, thus contributing to a better understanding of the physiology of a kind of flight with low energetic requirements. the four wing muscles studied (scapulotriceps, pectoralis, scapulohumeralis, and extensor metacarpi) exhibited higher percentages ... | 2015 | 9678503 |
| trace elements in clutches of yellow-legged gulls, larus cachinnans, from the medes islands, spain. | | 1997 | 9323225 |
| [host-parasite relations of the trematode microphallus papillorobustus (rankin 1940). iii factors involved in the behavioral changes of the gammarus, intermediate hosts and predator tests]. | the responses of infected and uninfected gammarus to certain stimuli are experimentally studied. under the influence of the cerebral metacercaria of microphallus papillorobustus , the light preferendum of the gammarids is shifted towards an area of higher illumination, the phototactism becomes strongly positive, the geotactism is reversed from positive to negative, the responses to mechanical disturbances are altered. predator tests show that infected gammarids are more vulnerable than uninfecte ... | 1984 | 6721368 |
| the intermediate hosts of wardium cirrosa (krabbe, 1869) spassky, 1961 (cestoda, cyclophyllidea, aploparaksidae) in ukraine. | the metacestodes of aploparaksid cestode wardium cirrosa krabbe, 1869 parasitic in gulls were found in polychaetes of the family nereidae collected off the black sea coast, ukraine. two species of polychaetes, hediste diversicolor (prevalence 5.3%; intensity 1-3 specimens) and neanthes succinea (prevalence 9.9%; intensity 1-39 specimens), were infected with cysticercoids that were observed either individually or in accumulations. the preliminary identification of the material based on morphologi ... | 2019 | 31612284 |