Publications

[on comparative osteogenesis of gallus domesticus l., larus ridibundus l. and larus canus l. ii. timely appearance of ossifications in larus ridibundus l. and larus canus l].		1967	5597019
[on comparative osteogenesis of gallus domesticus l., larus ridibundus l. and larus canus l. i. time of appearance of ossifications in gallus domesticus l].		1967	5586873
[on comparative osteogenesis of gallus domesticus l., larus ridibundus l. and larus canus l. i. time of appearance of ossifications in gallus domesticus l].		1967	5586873
[morphogenesis of the osteocranium of larus ridibundus l.: comparative study based on reconstruction models and elucidation preparations].		1972	4658034
[enzyme histochemical and fine structural observations on the pecten oculi of the pigeon (columba livia) and laughing gull (larus ridibundus)].		1972	4343361
[enzyme histochemical and fine structural observations on the pecten oculi of the pigeon (columba livia) and laughing gull (larus ridibundus)].		1972	4343361
morphogenesis and evolutionary morphology of the nasal apparatus of the black-headed gull larus ridibundus l.). ii. a morphological interpretation of individual structures. morphogenesis of the nasal capsule, nasal epithelial tube and organ of jacobson in sauropsida. x.		1985	3988170
morphogenesis and evolutionary morphology of the nasal apparatus of the black-headed gull larus ridibundus l.). ii. a morphological interpretation of individual structures. morphogenesis of the nasal capsule, nasal epithelial tube and organ of jacobson in sauropsida. x.		1985	3988170
flock-feeding on fish schools increases individual success in gulls.	flock-foraging and the role of white plumage in gulls and other seabirds have been the subject of much debate. at first sight it seems that competition within the flock would render flock formation against the interest of the bird who finds the fish school, as the fish must then be shared with birds joining the flock. however, it is also possible that flock formation is neutral or even beneficial to the individual members, including the bird that found the fish (the 'first finder'). here we show ...	2006	3945345
[the occurrence of salmonellae in wild birds (passeriformes, lariformes)].	the occurrence of salmonellae was investigated in 1011 cloacal smears of 21 species of wild birds caught at the locality of hermanický rybník near ostrava. salmonella typhimurium serotype was isolated from one of the 23 laughing gulls (larus ridibundus) which were examined; this corresponds to a 4.3% invasion frequency. the result of the examination of all other birds was negative. on the basis of the results of this study and the results published by other authors, laughing gull can be consider ...	1985	3927558
[the occurrence of salmonellae in wild birds (passeriformes, lariformes)].	the occurrence of salmonellae was investigated in 1011 cloacal smears of 21 species of wild birds caught at the locality of hermanický rybník near ostrava. salmonella typhimurium serotype was isolated from one of the 23 laughing gulls (larus ridibundus) which were examined; this corresponds to a 4.3% invasion frequency. the result of the examination of all other birds was negative. on the basis of the results of this study and the results published by other authors, laughing gull can be consider ...	1985	3927558
the radiation exposure of black-headed gulls (larus ridibundus) in the ravenglass estuary, cumbria, u.k.: a preliminary assessment.	a variety of fission-product and transuranic radionuclides originating from the marine discharges from the fuel reprocessing plant at sellafield, cumbria are detectable in the bodies of black-headed gulls and their environment in the ravenglass estuary approximately 10 km to the south-west of the plant. the maximum concentrations of 95nb, 137cs and 239/240pu detected in body tissues lie in the range 2 x 10(-3) to 1.5 x 10(-2) bqg-1 wet weight. many more radionuclides are detected in the regurgit ...	1986	3823858
lead, mercury, cadmium and selenium in two species of gull feeding on inland dumps, and in marine areas.	the influence of the foraging area on the intake of trace elements was evaluated in tissues of two species of gull: the black-headed gull (larus ridibundus) and the herring gull (larus argentatus). mercury levels were higher in birds from the coastal environment than in those caught on inland dumps; birds found at one dump site showed high levels of lead. interspecific differences in the levels of mercury and cadmium are discussed.	1986	3810137
lead, mercury, cadmium and selenium in two species of gull feeding on inland dumps, and in marine areas.	the influence of the foraging area on the intake of trace elements was evaluated in tissues of two species of gull: the black-headed gull (larus ridibundus) and the herring gull (larus argentatus). mercury levels were higher in birds from the coastal environment than in those caught on inland dumps; birds found at one dump site showed high levels of lead. interspecific differences in the levels of mercury and cadmium are discussed.	1986	3810137
the radiosensitivity of embryos of domestic chickens and black-headed gulls.	eggs of domestic chickens and black-headed gulls were continuously exposed to gamma-rays during incubation, using dose rates ranging from 0.004 to 0.08 gy h-1 for 20 days. acute-dose experiments were also conducted, and eggs were irradiated on day 10 of incubation with doses of between 1.92 and 28.8 gy. hatchability and numbers reaching full-term developed were affected only after chronic doses of 9.6 gy and acute doses of 4.8 gy or higher. maximum embryo mortality occurred around days 10-11 of ...	1988	3257949
structural adaptation of bird hemoglobins to high-altitude respiration and the primary sequences of black-headed gull (larus ridibundus, charadriiformes) alpha a- and beta/beta'-chains.	two hemoglobin components hba (alpha a2 beta 2) and (alpha d2 beta 2) have been detected by analytical electrophoresis in the lysed erythrocytes of the adult black-headed gull (larus ridibundus). we report the complete primary structure of the alpha a- and beta-chains of the major hemoglobin component hba. following the chain separation and isolation of the tryptic peptides by rp-hplc, the amino-acid sequence was established by automatic edman degradation in spinning cup and gas-phase sequencers ...	1988	3166738
structural adaptation of bird hemoglobins to high-altitude respiration and the primary sequences of black-headed gull (larus ridibundus, charadriiformes) alpha a- and beta/beta'-chains.	two hemoglobin components hba (alpha a2 beta 2) and (alpha d2 beta 2) have been detected by analytical electrophoresis in the lysed erythrocytes of the adult black-headed gull (larus ridibundus). we report the complete primary structure of the alpha a- and beta-chains of the major hemoglobin component hba. following the chain separation and isolation of the tryptic peptides by rp-hplc, the amino-acid sequence was established by automatic edman degradation in spinning cup and gas-phase sequencers ...	1988	3166738
[comparative studies of paramyxovirus isolates from wild birds].	as a result of a surveillance programme in north-germany, paramyxovirus-isolates of serogroup 1 with different pathogenicity were isolated from different species of feral birds (black-headed gull, mallard, tawny owl, tree sparrow, mute swan). in chick embryo fibroblast monolayers these isolates produced plaques exhibiting different plaque morphology. after cloning the isolates, further physicochemical, serological and pathogenicity testings were performed. on the basis of mean death time and int ...	1989	2763760
[the "diseased" or "dead" guillemots (uria aalge), three-toed gulls (rissa tridactyla), silver gulls (larus argentatus) and laughing gulls (larus ridibundus) found in the area of the german bay, 1982-1985].	between 1982 and 1985 the cadavers of 50 guillemots (uria aalge), 41 kittiwakes (rissa tridactyla), 26 herring gulls (larus argentatus) and 34 black-headed gulls (larus ridibundus) were examined pathological, bacteriological and virological. the probable cause of death was established. parasitosis were particularly prevalent in herring gulls (49%), where the main infection--as in black-headed gulls--was with cestoides. in kittiwakes and guillemots mainly spiruroideae were recorded. the commonest ...	1989	2752934
[the "diseased" or "dead" guillemots (uria aalge), three-toed gulls (rissa tridactyla), silver gulls (larus argentatus) and laughing gulls (larus ridibundus) found in the area of the german bay, 1982-1985].	between 1982 and 1985 the cadavers of 50 guillemots (uria aalge), 41 kittiwakes (rissa tridactyla), 26 herring gulls (larus argentatus) and 34 black-headed gulls (larus ridibundus) were examined pathological, bacteriological and virological. the probable cause of death was established. parasitosis were particularly prevalent in herring gulls (49%), where the main infection--as in black-headed gulls--was with cestoides. in kittiwakes and guillemots mainly spiruroideae were recorded. the commonest ...	1989	2752934
[antigenic variability of avian influenza virus a/h13, isolated in the ussr].	the antigenic structure of influenza h13 viruses isolated from wild birds in the ussr in 1976-1985 was studied. antiserum against the reference a/gull/maryland/704/77 (h13n6) strain was used to demonstrate the antigenic variations among the viruses. the homology of nucleotide sequences in the region 99-215 for the two a/h13n6 strains, a/gull/maryland/704/77 and a/great black-headed gull/astrakhan/227/84, were 75% and 86%, respectively. the 9-base segment deletion in a/grey black-headed gull/astr ...	1989	2609643
energy dissipation in the elastic recoil of leg tendons of larus ridibundus.	cycles of tension and recoil were given to different tendons of black-headed gull (larus ridibundus) in an instron universal testing machine. it is shown that a large proportion of the energy elastically stored in straining is released upon recoil, ranging the energy lost (dissipation energy) between 8 and 13%. these results are in complete agreement with those published in the literature on mammals and birds that can be considered as the most accurate.	1989	2606322
energy dissipation in the elastic recoil of leg tendons of larus ridibundus.	cycles of tension and recoil were given to different tendons of black-headed gull (larus ridibundus) in an instron universal testing machine. it is shown that a large proportion of the energy elastically stored in straining is released upon recoil, ranging the energy lost (dissipation energy) between 8 and 13%. these results are in complete agreement with those published in the literature on mammals and birds that can be considered as the most accurate.	1989	2606322
[craniogenesis in the laughing gull (larus ridibundus l.). the reconstruction of the basic plan of the bird].	to contribute to the knowledge of the cranium of older bird embryos, the chondrocranium and osteocranium of the black-headed gull (larus ridibundus) are described. the chondrocranium of the black-headed gull is compared with the chondrocranium of other bird species with special consideration of functional and phylogenetic aspects. as a result a "grundplan" of the bird chondrocranium is reconstructed. most of the chondrocranial autapomorphies of birds are connected with the enlargement of the eye ...	1990	2242817
[craniogenesis in the laughing gull (larus ridibundus l.). the reconstruction of the basic plan of the bird].	to contribute to the knowledge of the cranium of older bird embryos, the chondrocranium and osteocranium of the black-headed gull (larus ridibundus) are described. the chondrocranium of the black-headed gull is compared with the chondrocranium of other bird species with special consideration of functional and phylogenetic aspects. as a result a "grundplan" of the bird chondrocranium is reconstructed. most of the chondrocranial autapomorphies of birds are connected with the enlargement of the eye ...	1990	2242817
[the occurrence of campylobacter spp. and salmonella spp. in gulls in northern germany].	out of a total of 207 gulls--20 black headed gulls, 185 herring gulls and 2 common gulls--128 (62%) and 23 (11%) birds, respectively, were infected with campylobacter spp. (c.) and salmonella spp. c. jejuni was predominant in gulls less than two years old (89%) and c. coli in older birds (75%). furthermore, the infection rate with campylobacters was depending on the habitats of the birds. the rate for c. jejuni and c. coli, respectively, was in gulls from regional garbage dumps 78% and 4%, from ...	1991	2065612
[detection and characterization of salmonella strains from laughing gulls (larus ridibundus)].	25 and 17 salmonella strains could be isolated from 429 and 423 blackheaded gulls (larus ridibundus), respectively, during two years of examination. s. typhimurium was the most frequent serovar. all strains of s. typhimurium belonged to the biochemovar c (inosite and rhamnose negative), nearly a third of isolates caused a mannose-sensitive hemagglutination of guinea pig erythrocytes. this result is in contradiction to the literature. furthermore the phagovars, the plasmid profiles and the resist ...	1991	1786042
[detection and characterization of salmonella strains from laughing gulls (larus ridibundus)].	25 and 17 salmonella strains could be isolated from 429 and 423 blackheaded gulls (larus ridibundus), respectively, during two years of examination. s. typhimurium was the most frequent serovar. all strains of s. typhimurium belonged to the biochemovar c (inosite and rhamnose negative), nearly a third of isolates caused a mannose-sensitive hemagglutination of guinea pig erythrocytes. this result is in contradiction to the literature. furthermore the phagovars, the plasmid profiles and the resist ...	1991	1786042
localisation and characterisation of egg shell porphyrins in several avian species.	1. electron microscopy, infra-red analysis and histochemical techniques have been used to determine the site of pigment deposition, the cellular localisation of pigment and the type of pigment precipitated in the egg shells of quail, white leghorn, brown ranger and black-headed gull. 2. transfer of pigment occurs via the surface epithelial cells of the shell gland. 3. porphyrins are probably synthesised in the blood. 4. possible pigment deposition mechanisms are discussed.	1975	1139348
a study on the role of birds in the spread of infections.	during three expeditions undertaken in march 1977 to june 1978, 797 cloacal swabs were collected from birds of 54 species. seven salmonella strains of six serotype were isolated from larus ridibundus (five strains), corvus frugilegus and acrocephalus schoenobaenus (one each). four strains of influenza a (hav2 na4v) virus were isolated from larus ridibundus. for the first time in czechoslovakia, two strains of yucaipa paramyxovirus were isolated, both of them from troglodytes troglodytes. these r ...	1979	575902
a study on the role of birds in the spread of infections.	during three expeditions undertaken in march 1977 to june 1978, 797 cloacal swabs were collected from birds of 54 species. seven salmonella strains of six serotype were isolated from larus ridibundus (five strains), corvus frugilegus and acrocephalus schoenobaenus (one each). four strains of influenza a (hav2 na4v) virus were isolated from larus ridibundus. for the first time in czechoslovakia, two strains of yucaipa paramyxovirus were isolated, both of them from troglodytes troglodytes. these r ...	1979	575902
agonistic display and spacing in the black-headed gull, larus ridibundus.	black-headed gulls nesting on islands in a marsh habitat had a higher breeding success than those nesting on the periphery of the colony. island birds maintained close inter-nest distances whereas peripheral nests were spaced further apart as predation of eggs increased. these changes in spacing corresponded with changes in the response distances of agonistic displays. there was no change during incubation for island birds but peripheral birds displayed to intruders at much greater distances tha ...	1977	562633
agonistic display and spacing in the black-headed gull, larus ridibundus.	black-headed gulls nesting on islands in a marsh habitat had a higher breeding success than those nesting on the periphery of the colony. island birds maintained close inter-nest distances whereas peripheral nests were spaced further apart as predation of eggs increased. these changes in spacing corresponded with changes in the response distances of agonistic displays. there was no change during incubation for island birds but peripheral birds displayed to intruders at much greater distances tha ...	1977	562633
on the occurrence of argyrophil and fluorescent cells in the ultimobranchial body of larus ridibundus (l.).		1977	409050
mucopolysaccharide histochemistry of the avian tongue. histochemical features of the lingual glands in larus ridibundus (l).	from the histochemical analysis carried out on the tongue of larus ridibundus (l.), it has been possible to establish that it is covered by thick stratum corneum on the dorsal surface and shows both in the anterior and posterior portions lingual glands, which histologically consist of aggregates of branched tubules. these glands exhibit identical histochemical reactions which show the presence of neutral mucopolysaccharides, sulfated and unsulfated acid mucosubstances and hyaluronidase-resistant ...	1977	145782
isolation of an influenza a virus strain from a bird embryo (larus ridibundus) collected in slovakia.	avian influenza virus a/larus 36/77 (hav7nav1) was isolated in 1977 from a trinket (larus ridibundus) embryo. this result suggests the possibility of vertical transmission of influenza a virus.	1979	87125
isolation of an influenza a virus strain from a bird embryo (larus ridibundus) collected in slovakia.	avian influenza virus a/larus 36/77 (hav7nav1) was isolated in 1977 from a trinket (larus ridibundus) embryo. this result suggests the possibility of vertical transmission of influenza a virus.	1979	87125