Influence of seasonality and biological activity on infection by helminths in Cantabrian bear
This study aimed to investigate the variations of parasites in the feces of brown bears Ursus arctos inhabiting the Cantabrian Mountains (NW Spain). A total of 248 bear fecal samples were collected throughout one year, spanning from August 2018 to September 2019, at an approximate frequency of 20 sa...
Published in: | International Journal for Parasitology: Parasites and Wildlife |
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ftdoajarticles:oai:doaj.org/article:35831feb8fd346479d59cf6816ab4348 2024-09-15T18:40:11+00:00 Influence of seasonality and biological activity on infection by helminths in Cantabrian bear Esther Valderrábano Cano Vincenzo Penteriani Iris Vega María del Mar Delgado Enrique González-Bernardo Giulia Bombieri Alejandra Zarzo-Arias Rita Sánchez-Andrade Fernández Adolfo Paz-Silva 2024-04-01T00:00:00Z https://doi.org/10.1016/j.ijppaw.2024.100916 https://doaj.org/article/35831feb8fd346479d59cf6816ab4348 EN eng Elsevier http://www.sciencedirect.com/science/article/pii/S2213224424000129 https://doaj.org/toc/2213-2244 2213-2244 doi:10.1016/j.ijppaw.2024.100916 https://doaj.org/article/35831feb8fd346479d59cf6816ab4348 International Journal for Parasitology: Parasites and Wildlife, Vol 23, Iss , Pp 100916- (2024) Ursus arctos NW Spain Endoparasites Seasonality Fecal prevalence Zoology QL1-991 article 2024 ftdoajarticles https://doi.org/10.1016/j.ijppaw.2024.100916 2024-08-05T17:49:40Z This study aimed to investigate the variations of parasites in the feces of brown bears Ursus arctos inhabiting the Cantabrian Mountains (NW Spain). A total of 248 bear fecal samples were collected throughout one year, spanning from August 2018 to September 2019, at an approximate frequency of 20 samples per month. The results were analyzed in relation to both the season and the biological activity of the brown bears, i.e., hibernation, mating and hyperphagia. Among the examined samples, eggs of Dicrocoelium dendriticum (32.2%; 95% Confidence Interval: 26.4–38.1), Baylisascaris sp. (44.8%; 38.5–50.9), ancylostomatids (probably belonging to Uncinaria spp.) (16.5%; 11.9–21.1) and Trichuris sp. (1.2%; 0–2.6) were observed. Significant seasonal differences were noted for Baylisascaris and ancylostomatids (χ2 = 21.02, P = 0.001 and χ2 = 34.41, P = 0.001, respectively). Furthermore, the presence of helminth eggs was correlated with the activity phase of the brown bears. Dicrocoelium attained the highest prevalence during the mating phase, while Baylisascaris and ancylostomatids were more frequent during hyperphagia. Notably, the highest egg-output counts for Dicrocoelium and Baylisascaris sp. were recorded during the mating phase and hibernation, respectively, whereas ancylostomatids eggs peaked during hyperphagia. Additionally, variations in egg-output counts were significant for all helminths concerning the season, with the exception of Trichuris sp., and for Dicrocoelium and Baylisascaris sp. According to bear activity. It is concluded that infection by gastrointestinal helminths depends on the season and the biological activity of the bears from the Cantabrian Mountains, and their health status could result influenced. Article in Journal/Newspaper Ursus arctos Directory of Open Access Journals: DOAJ Articles International Journal for Parasitology: Parasites and Wildlife 23 100916 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ursus arctos NW Spain Endoparasites Seasonality Fecal prevalence Zoology QL1-991 |
spellingShingle |
Ursus arctos NW Spain Endoparasites Seasonality Fecal prevalence Zoology QL1-991 Esther Valderrábano Cano Vincenzo Penteriani Iris Vega María del Mar Delgado Enrique González-Bernardo Giulia Bombieri Alejandra Zarzo-Arias Rita Sánchez-Andrade Fernández Adolfo Paz-Silva Influence of seasonality and biological activity on infection by helminths in Cantabrian bear |
topic_facet |
Ursus arctos NW Spain Endoparasites Seasonality Fecal prevalence Zoology QL1-991 |
description |
This study aimed to investigate the variations of parasites in the feces of brown bears Ursus arctos inhabiting the Cantabrian Mountains (NW Spain). A total of 248 bear fecal samples were collected throughout one year, spanning from August 2018 to September 2019, at an approximate frequency of 20 samples per month. The results were analyzed in relation to both the season and the biological activity of the brown bears, i.e., hibernation, mating and hyperphagia. Among the examined samples, eggs of Dicrocoelium dendriticum (32.2%; 95% Confidence Interval: 26.4–38.1), Baylisascaris sp. (44.8%; 38.5–50.9), ancylostomatids (probably belonging to Uncinaria spp.) (16.5%; 11.9–21.1) and Trichuris sp. (1.2%; 0–2.6) were observed. Significant seasonal differences were noted for Baylisascaris and ancylostomatids (χ2 = 21.02, P = 0.001 and χ2 = 34.41, P = 0.001, respectively). Furthermore, the presence of helminth eggs was correlated with the activity phase of the brown bears. Dicrocoelium attained the highest prevalence during the mating phase, while Baylisascaris and ancylostomatids were more frequent during hyperphagia. Notably, the highest egg-output counts for Dicrocoelium and Baylisascaris sp. were recorded during the mating phase and hibernation, respectively, whereas ancylostomatids eggs peaked during hyperphagia. Additionally, variations in egg-output counts were significant for all helminths concerning the season, with the exception of Trichuris sp., and for Dicrocoelium and Baylisascaris sp. According to bear activity. It is concluded that infection by gastrointestinal helminths depends on the season and the biological activity of the bears from the Cantabrian Mountains, and their health status could result influenced. |
format |
Article in Journal/Newspaper |
author |
Esther Valderrábano Cano Vincenzo Penteriani Iris Vega María del Mar Delgado Enrique González-Bernardo Giulia Bombieri Alejandra Zarzo-Arias Rita Sánchez-Andrade Fernández Adolfo Paz-Silva |
author_facet |
Esther Valderrábano Cano Vincenzo Penteriani Iris Vega María del Mar Delgado Enrique González-Bernardo Giulia Bombieri Alejandra Zarzo-Arias Rita Sánchez-Andrade Fernández Adolfo Paz-Silva |
author_sort |
Esther Valderrábano Cano |
title |
Influence of seasonality and biological activity on infection by helminths in Cantabrian bear |
title_short |
Influence of seasonality and biological activity on infection by helminths in Cantabrian bear |
title_full |
Influence of seasonality and biological activity on infection by helminths in Cantabrian bear |
title_fullStr |
Influence of seasonality and biological activity on infection by helminths in Cantabrian bear |
title_full_unstemmed |
Influence of seasonality and biological activity on infection by helminths in Cantabrian bear |
title_sort |
influence of seasonality and biological activity on infection by helminths in cantabrian bear |
publisher |
Elsevier |
publishDate |
2024 |
url |
https://doi.org/10.1016/j.ijppaw.2024.100916 https://doaj.org/article/35831feb8fd346479d59cf6816ab4348 |
genre |
Ursus arctos |
genre_facet |
Ursus arctos |
op_source |
International Journal for Parasitology: Parasites and Wildlife, Vol 23, Iss , Pp 100916- (2024) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S2213224424000129 https://doaj.org/toc/2213-2244 2213-2244 doi:10.1016/j.ijppaw.2024.100916 https://doaj.org/article/35831feb8fd346479d59cf6816ab4348 |
op_doi |
https://doi.org/10.1016/j.ijppaw.2024.100916 |
container_title |
International Journal for Parasitology: Parasites and Wildlife |
container_volume |
23 |
container_start_page |
100916 |
_version_ |
1810484497423007744 |