Gastrointestinal helminths of Emperor Penguin (Aptenodytes forsteri) from Antarctica

Fusaro, Bruno; Libertelli, Marcela; Ansaldo, Martı́n; Coria, Néstor Rubén; Díaz, Julia Inés

doi:10.1007/s00300-018-2289-2

Cited by 9 publications

(8 citation statements)

References 38 publications

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“…Inevitably, reports and descriptions of parasites appear after the host's biology studies. Therefore, it is not surprising that there are so few published reports on parasites of Antarctic organisms since the middle of the twentieth century (Mackenzie 2017;Fusaro et al 2018). Even though pathogens have the potential to cause rapid declines in vulnerable vertebrate populations, less is known about the threat that small petrels face from infectious disease.…”

Section: Introductionmentioning

confidence: 99%

Gastrointestinal helminths of two Storm Petrel species, Oceanites oceanicus and Fregetta tropica, from Antarctica

Fusaro

Lorenti

Panisse

et al. 2023

Preprint

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Although knowledge about parasitic diseases in Antarctic birds is scarce, an increasing number of studies are currently being carried out in this area. The importance of the host-parasite relationship in Antarctic seabirds is key to understanding trophic ecology and epidemiology of infection diseases, especially in those birds with extensive migratory routes that can act as reservoirs and distributors of diseases. This study aims to provide information on helminths of two Storm Petrel species, the Wilson’s storm-petrel Oceanites oceanicus and the Black-bellied storm-petrel Fregetta tropica. Twenty individuals were analysed: 18 O. oceanicus (8 adults, 10 chicks) and 2 F. tropica (adults); 89% of the O. oceanicus were parasitized with the nematode Stegophorus macronectes, whereas 100% of F. tropica was parasitized by at least one of three parasite species identified: S. macronectes, Seuratiasp., and Tetrabothrius sp. The low richness of parasites observed is associated with a stenophagic diet. However, a clear difference is observed between both species related to a higher fish ingestion by F. tropica, unlike O. oceanicus with a higher ingestion of krill.

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Section: Introductionmentioning

confidence: 99%

Gastrointestinal helminths of two Storm Petrel species, Oceanites oceanicus and Fregetta tropica, from Antarctica

Fusaro

Lorenti

Panisse

et al. 2023

Preprint

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Section: Introductionmentioning

confidence: 99%

Gastrointestinal helminths of two storm-petrel species, Oceanites oceanicus and Fregetta tropica, (Aves: Oceanitidae) from Antarctica

Fusaro,

Lorenti,

Panisse

et al. 2023

Polar Biol

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Although knowledge about parasitic diseases in Antarctic birds is scarce, an increasing number of studies are currently being carried out in this area. The importance of the host-parasite relationship in Antarctic seabirds is key to understanding trophic ecology and epidemiology of infection diseases, especially in those birds with extensive migratory routes that can act as reservoirs and distributors of diseases. This study aims to provide information on helminths of two Storm Petrel species, the Wilson's storm-petrel Oceanites oceanicus and the Black-bellied storm-petrel Fregetta tropica. Twenty individuals were analysed: 18 O. oceanicus (8 adults, 10 chicks) and 2 F. tropica (adults); 89% of the O. oceanicus were parasitized with the nematode Stegophorus macronectes, whereas 100% of F. tropica was parasitized by at least one of three parasite species identi ed: S. macronectes, Seuratiasp., and Tetrabothrius sp. The low richness of parasites observed is associated with a stenophagic diet. However, a clear difference is observed between both species related to a higher sh ingestion by F. tropica, unlike O. oceanicus with a higher ingestion of krill.

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“…(Forster), the chinstrap penguin, P. antarcticus (Forster) and the adéliae penguin, P. adeliae (Hombron & Jacquinot). Also in the rockhopper penguin Eudyptes chrysocome (Forster), in macaroni penguin Eudyptes crysolophus (Brandt)(Diaz et al 2017), in emperor penguin Aptenopdytes forsteri (Gray)(Fusaro et al 2018), the storm-petrel Oceanites oceanicus Kuhl and Fregeta tropica Gould(Fusaro et al 2023). With the exception of A. fosteri where the prevalence was 10%, in the other host species it had higher values (Vidal et al 2012;Diaz et al 2013Diaz et al , 2016Fusaro et al 2018Fusaro et al , 2023.…”

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confidence: 99%

“…Also in the rockhopper penguin Eudyptes chrysocome (Forster), in macaroni penguin Eudyptes crysolophus (Brandt)(Diaz et al 2017), in emperor penguin Aptenopdytes forsteri (Gray)(Fusaro et al 2018), the storm-petrel Oceanites oceanicus Kuhl and Fregeta tropica Gould(Fusaro et al 2023). With the exception of A. fosteri where the prevalence was 10%, in the other host species it had higher values (Vidal et al 2012;Diaz et al 2013Diaz et al , 2016Fusaro et al 2018Fusaro et al , 2023. Stegophorus diomedeae parasitized a narrow spectrum of hosts, so far being restricted only to the families Diomedeidae and Procellaridae (Procellariformes) with a circumpolar distribution(Cremonte et al 2002).Despite having found only immature specimens of Tetrameres sp., this is a frequent genus parasite of proventricular glands of bird and was found represented in Antarctica by the species T. wetzeli, which was found in different penguin species(Diaz et al 2017;Fusaro et al 2018).…”

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confidence: 99%

“…With the exception of A. fosteri where the prevalence was 10%, in the other host species it had higher values (Vidal et al 2012;Diaz et al 2013Diaz et al , 2016Fusaro et al 2018Fusaro et al , 2023. Stegophorus diomedeae parasitized a narrow spectrum of hosts, so far being restricted only to the families Diomedeidae and Procellaridae (Procellariformes) with a circumpolar distribution(Cremonte et al 2002).Despite having found only immature specimens of Tetrameres sp., this is a frequent genus parasite of proventricular glands of bird and was found represented in Antarctica by the species T. wetzeli, which was found in different penguin species(Diaz et al 2017;Fusaro et al 2018). We cannot discard the hypothesis that these nematode larvae correspond to any Tetrameres species parasite of SGP of which there is still no record.…”

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confidence: 99%

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Assessing helminth infection in some reproductive colonies of Southern Giant Petrel (Macronectes giganteus) from Antarctica

Fusaro,

Capasso,

Lorenti

et al. 2024

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The host/parasite relationship is a key tool for understanding the role of parasitism in the feeding ecology of Antarctic seabirds. Especially, birds with extensive migratory routes through isolated regions are particularly sensitive to new infections. Although research on parasitic diseases in Antarctic birds is sparse and information is fragmentary, an increasing number of studies are currently underway in this area. The present study aims to provide new information on parasitic helminths in the Southern Giant Petrel Macronectes giganteus in some nesting areas, integrating different parasitological techniques. A total of 126 faecal samples, 16 regurgitates and six dead individuals (five adults and one chick) were analysed for helminth parasites. Members of four helminth groups (Cestoda, Digenea, Nematoda, Acantocephala) represented the parasitic diversity of the Southern Giant Petrel in the studied localities. All dead birds analysed (P = 100%) harboured helminth parasites, additionally P = 49.2% of the fecal samples and P = 0.06% of the regurgitated individuals presented at least one of the different helminth groups found in the viscera. The combination of three diagnostic techniques allowed us to determine the presence of nine adult helminth species (Cosmocephalus obvelatus, Stegophorus macronectes, Stegophorus diomedeae, Contracaecum sp., Parorchites zederi, Tetrabothrius heteroclitus, Diphylobotrium sp., Corynosoma shackletoni, and Renicolidae). In addition, juvenile specimens of Tetrameres sp. and Anisakis sp. were found in the eviscerated host. We discuss the trophic relationships of the hosts and their influence in the helminth infestations. This study provides new knowledge about the parasitic diversity of the Southern Giant Petrel in its nestling areas with new records of helminth species in Antarctica.

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Gastrointestinal helminths of Emperor Penguin (Aptenodytes forsteri) from Antarctica

Cited by 9 publications

References 38 publications

Gastrointestinal helminths of two Storm Petrel species, Oceanites oceanicus and Fregetta tropica, from Antarctica

Gastrointestinal helminths of two Storm Petrel species, Oceanites oceanicus and Fregetta tropica, from Antarctica

Gastrointestinal helminths of two storm-petrel species, Oceanites oceanicus and Fregetta tropica, (Aves: Oceanitidae) from Antarctica

Assessing helminth infection in some reproductive colonies of Southern Giant Petrel (Macronectes giganteus) from Antarctica

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