Parasitic helminths in grey heron (Ardea cinerea) chicks

Biologia ◽  
2015 ◽  
Vol 70 (2) ◽  
Author(s):  
Janina Dziekońska-Rynko ◽  
Katarzyna Mierzejewska ◽  
Piotr Hliwa
Keyword(s):  
Intensity Of Infection ◽  
Grey Heron ◽  
Breeding Colony ◽  
Mean Intensity ◽  
Parasitic Helminths ◽  
Central Poland ◽  
Vistula River ◽  
Contracaecum Rudolphii ◽  
Ardea Cinerea

AbstractParasitological studies were carried out on pulli (n = 20) collected on a breeding colony near the Włocławski Reservoir on the Vistula River (Central Poland). Larvae of the nematode Contracaecum rudolphii (mean intensity of infection 9.3) were detected in the stomachs of all chicks, with adult worms present in two chicks. Larvae of the nematode Porrocaecum ardeae (mean intensity 3.1), the tapeworm Paradilepis scolecina (58.5) and flukes of five genera: Tylodelphys, Posthodiplostomum, Apharyngostrigea, Paryphostomum and Echinochasmus (mean intensity in total 28.1) were found in the intestines of all chicks. The studies demonstrated that grey heron chicks are infected with parasites very early in life, which may adversely impact their health. The presence of adult C. rudolphii nematodes indicates a transfer of parasites from adult birds to chicks during feeding.

Breeding Colony and Current Status of the Grey Heron (Ardea cinerea) in Heuksan-myeon, Sinan County, Republic of Korea

2019 ◽  
Vol 31 (2) ◽  
pp. 229-242
Author(s):  
Chang-Uk Park ◽  
Jong-Gil Park ◽  
Yang-Mo Kim ◽  
Sook-Young Cho
Keyword(s):  
Republic Of Korea ◽  
Current Status ◽  
Grey Heron ◽  
Breeding Colony ◽  
Ardea Cinerea

scholarly journals Stress or help, how does the grey heron Ardea cinerea L. modify the vegetation structure of the forest floor?

2019 ◽  
Vol 88 (2) ◽  
Author(s):  
Wiktoria Hryń ◽  
Joanna Czarnecka ◽  
Ignacy Kitowski ◽  
Piotr Bartmiński ◽  
Robert Zubel
Keyword(s):  
Vegetation Structure ◽  
Species Turnover ◽  
Mixed Forest ◽  
High Light ◽  
Herb Layer ◽  
Light Conditions ◽  
Forest Types ◽  
Grey Heron ◽  
Breeding Colony ◽  
Ardea Cinerea

The grey heron (<em>Ardea cinerea</em>) is a good example of an engineering species that forms nesting colonies (called heronries) composed of up to a few hundred nests during the breeding season. It exerts strong pressure on surrounding vegetation, mainly because of the heavy input of organic matter and high eutrophication. The birds also alter light conditions through direct tree damage. We aimed to examine the influence of a grey heron breeding colony on the soil properties and functional composition of the herb layer in two different forest communities: a suboceanic pine forest and a riparian mixed forest. We also wanted to establish whether these changes would make the forest ecosystem more vulnerable to colonization by nonforest species with higher light and trophic demands. Small-seeded, light demanding eutrophic species showed a tendency to be more abundant under the nests in both forest types. The calculated odds ratio (OR) showed that the probability of the presence of nonforest species under the nests was 29.5 times higher than that in the control plots (56 plants species were analyzed). Additionally, the nonforest species appeared to have high light and trophic demand (OR of 12.3 for light demand; OR of 7.0 for trophic demand), which explains the species turnover observed in the bird-affected microhabitats.

scholarly journals First record of Contracaecum spp. (Nematoda : Anisakidae) in fish-eating birds from Zimbabwe

2004 ◽  
Vol 75 (2) ◽  
Author(s):  
M. Barson ◽  
B.E. Marshall
Keyword(s):  
Electron Microscopy ◽  
First Record ◽  
Intermediate Hosts ◽  
Grey Heron ◽  
Cichlid Fishes ◽  
Parasite Intensity ◽  
Contracaecum Rudolphii ◽  
Ardea Cinerea ◽  
First Time ◽  
Scanning Electron

Endoparasites of fish-eating birds, Phalacrocorax africanus, P. carbo, Anhinga melanogaster and Ardea cinerea collected from Lake Chivero near Harare, Zimbabwe, were investigated. Adult Contracaecum spp. were found in the gastrointestinal tract (prevalence 100% in P. africanus, P. carbo and A. melanogaster; 25 % in A. cinerea). Parasite intensity was 11-24 (mean 19) in P. africanus, 4-10 (mean 7) in P. carbo, 4-56 (mean 30) in A. melanogaster and 2 (mean 0.5) in A. cinerea. The cormorants fed mainly on cichlid fishes and carp; the darters and the grey herons on cichlids. All these fishes are intermediate hosts of Contracaecum spp. Scanning electron microscopy revealed that Contracaecum rudolphii infected both cormorant species and darters; C. carlislei infected only the cormorants while C. tricuspis and C. microcephalum infected only the darters. Parasites from the grey heron were not identified to species because they were still developing larvae. These parasites are recorded in Zimbabwe for the first time.

Migration and Home Range of the Grey Heron (Ardea cinerea) in the Republic of Korea

Waterbirds ◽  
2021 ◽  
Vol 44 (1) ◽  
Author(s):  
Eun-Hong Lim ◽  
Man-Seok Shin ◽  
Hae-Jin Cho ◽  
In-Kyu Kim ◽  
Yong-Un Shin ◽  
...  
Keyword(s):  
Home Range ◽  
Republic Of Korea ◽  
Grey Heron ◽  
Ardea Cinerea ◽  
The Republic

Seasonal variation of Mastophorus muris (Nematoda: Spirurida) in the water vole Arvicola amphibius from southern Sweden

2018 ◽  
Vol 94 ◽  
Author(s):  
B. Neupane ◽  
A.L. Miller ◽  
A.L. Evans ◽  
G.E. Olsson ◽  
J. Höglund
Keyword(s):  
Generalized Linear Model ◽  
Functional Group ◽  
Stomach Contents ◽  
Water Vole ◽  
Model Output ◽  
Southern Sweden ◽  
Intensity Of Infection ◽  
Mean Intensity ◽  
Arvicola Amphibius ◽  
Formed Part

AbstractThis study focused on the spirurid nematode Mastophorus muris in water voles (Arvicola amphibius) trapped in three regions in southern Sweden during spring and fall 2013. The collection of water voles formed part of a larger project (EMIRO) on the cestode Echinococcus multilocularis in rodents. The voles’ stomach contents were examined for the presence of M. muris. Prevalence, mean abundance and mean intensity of infection were calculated. A generalized linear model model was used to examine the effects of sex, functional group, season and region on the number of M. muris individuals in each vole. Forty-seven of 181 (26%) voles were infected with M. muris, with up to 74 worms each. The overall mean intensity (worms per infected vole) was 15 (95% CI 10–21), and abundance (mean number of worms in all voles) was 4 (95% CI 2–6). Model output indicated a significant effect of season and region with respect to abundance of nematode infection, which was independent of sex and functional group of the investigated host.

scholarly journals Parasitism of Cichlasoma paranaense Kullander, 1983 and Gymnotus carapo Linnaeus, 1814 by Clinostomum complanatum (Rudolphi, 1814) Metacercariae in the Taquari river

2005 ◽  
Vol 65 (3) ◽  
pp. 513-519 ◽  
Author(s):  
A. T. Silva-Souza ◽  
G. Ludwig
Keyword(s):  
Condition Factor ◽  
Infected Fish ◽  
Expected Value ◽  
Yellow Spot ◽  
Total Weight ◽  
Intensity Of Infection ◽  
Mean Intensity ◽  
Spot Disease ◽  
Relative Condition Factor ◽  
Clinostomum Complanatum

The infection, known as yellow spot disease, produced by metacercariae of Clinostomum spp. was studied in fishes of the Taquari river, located in Jataizinho, Paraná State, Brazil. A total of 1,582 specimens, belonging to 36 species, were collected between March 1999 and April 2001. Yellow spot disease was observed only in Gymnotus carapo Linnaeus, 1814 (Gymnotiformes, Gymnotidae) and Cichlasoma paranaense Kullander, 1983 (Perciformes, Cichlidae). This parasitism was generated by metacercariae of Clinostomum complanatum (Rudolphi, 1814) (Digenea, Clinostomidae). Among the 88 specimens of G. carapo examined, 7 (prevalence = 8%) had cysts of the parasite. Four of them were captured in July 1999 and three in October 1999. In the other months, no specimen found was infected. Using relative condition factor (Kn) analysis, it was determined that both infected and non-infected specimens had a total weight equal to the theoretically expected value for each total length (Kn = 1.0). Among 56 individuals of Cichlasoma paranaense, 6 (prevalence = 10.7%) had between 1 and 27 metacercariae of C. complanatum (mean intensity of infection = 9.3 ± 9.6). In March 1999 and April of both 2000 and 2001, the specimens examined were not infected. The infected fish had a total weight higher than the expected value (Kn > 1.0), while the non-infected fish had a weight equal to the expected value (Kn = 1.0).

Epidemiology of acanthocephalan infections in crabs from the Bahía Blanca Estuary, Argentina

2011 ◽  
Vol 86 (4) ◽  
pp. 446-452 ◽  
Author(s):  
L.F. La Sala ◽  
A.M. Perez ◽  
S.R. Martorelli
Keyword(s):  
Risk Factors ◽  
Carapace Length ◽  
Carapace Width ◽  
Infection Prevalence ◽  
Intensity Of Infection ◽  
Breeding Colony ◽  
Bahía Blanca Estuary ◽  
Feeding Area ◽  
Olrog’S Gull ◽  
Blanca Estuary

AbstractThis study was conducted in two populations of crabs, Cyrtograpsus angulatus and Neohelice granulata from the Bahía Blanca Estuary, in Argentina, to identify risk factors for infection by the acanthocephalan Profilicollis chasmagnathi and to assess the association between infection and mortality of these hosts. Cyrtograpsus angulatus and N. granulata crabs were sampled seasonally over the course of a year, and spring sampling included collection of dead crabs predated by Olrog's gulls in a nearby breeding colony. Potential risk factors for infection were assessed and the number of cystacanth larvae per crab was counted. In C. angulatus, the odds of infection increased by 7% for each millimetre increase in carapace length, and were nearly 17 times greater in crabs sampled from the Olrog's gull feeding area compared with those sampled from nests in the breeding colony. For every millimetre increase in carapace length in N. granulata, the odds of infection increased by 13% in crabs from the breeding colony, and by 32% in crabs from the feeding area. Mean intensity of infection in N. granulata increased by 16.5% for each additional millimetre of carapace width. The level of parasite aggregation was lowest in the largest C. angulatus and highest in N. granulata predated by Olrog's gull. The results show that host size is the most important factor influencing infection prevalence in both crab species and intensity of infection in N. granulata, and suggest the presence of parasite-induced mortality in the populations studied.

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