The black grouse (Tetrao tetrix) is an endangered species facing challenges in breeding and reintroduction programs, including parasitic infestations. This study aimed to assess natural infestations by various Eimeria species and infestation dynamics in female, male, and young black grouse kept in a stationary aviary. Faecal samples were collected from adult grouses between April and the time of chicks' hatching and rearing (September). Faecal samples from young birds were collected from the hatching for a period of 1 year. The prevalence of Eimeria spp. was determined by a qualitative method (Fulleborn's flotation) and a quantitative method (McMaster's method with Raynaud's modification). The following Eimeria species were identified: E. lyruri, E. nadsoni and E. nonbrumpti. The average percentages of Eimeria spp. in the cock were 80.52%, 9.27%, and 10.21%, respectively; in the hen, they were 86.19%, 9.28%, and 4.53%, respectively; in the young black grouses they were 84.60%, 9.34% and 6.06%, respectively. The highest E. lyruri infestation was observed in the cock in June (144227 OPG) and July (129365 OPG). In the hen, the infestation intensity increased in May (304302 OPG) and then decreased in June (39583 OPG). Furthermore, an additional increase was observed in July (216533 OPG). Two increases in infestation intensity were also observed in young birds, with peaks in January (91387 OPG) and July (126178 OPG). A positive strong correlation was identified between Eimeria spp. in the cock and the young birds. A statistically significant positive correlation was identified in the hen between E. lyruri and E. nadsoni. No correlation was demonstrated between the infestation intensity and the age of the birds or season of the year in all the grouses under study. Despite some attempts, a comprehensive approach to the issue of coccidiosis in the black grouse as a disease that may affect the success of reintroduction has yet to be established. It seems crucial to monitor the level of Eimeria spp. invasion, and the proposed faecal sampling scheme is an important tool for achieving this goal.
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http://dx.doi.org/10.1016/j.psj.2024.104317 | DOI Listing |
Poult Sci
December 2024
Department of Parasitology and Invasive Diseases, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, M. Oczapowskiego 13, 10-719 Olsztyn, Poland. Electronic address:
The black grouse (Tetrao tetrix) is an endangered species facing challenges in breeding and reintroduction programs, including parasitic infestations. This study aimed to assess natural infestations by various Eimeria species and infestation dynamics in female, male, and young black grouse kept in a stationary aviary. Faecal samples were collected from adult grouses between April and the time of chicks' hatching and rearing (September).
View Article and Find Full Text PDFJ Therm Biol
August 2024
Oregon State University, Department of Fisheries, Wildlife and Conservation Sciences, 104 Nash Hall, Corvallis, OR, 97331, USA. Electronic address:
Wildlife space use is driven by three primary mechanisms, predator avoidance, foraging, and thermoregulation. The latter has largely been overlooked in wildlife research. Understanding how habitat use is influenced by thermoregulatory properties is a critical component to depicting species' ecology.
View Article and Find Full Text PDFConserv Physiol
August 2024
Faculty of Veterinary Medicine, University of Calgary, 3280 Hospital Dr NW, Calgary, AB T2N 4Z6, Canada.
Greater sage-grouse () are a critically endangered species in Canada with fewer than 140 individuals remaining on native habitats in southern Alberta and Saskatchewan. In 2014, the Wilder Institute/Calgary Zoo initiated North America's only zoo-based conservation breeding program for this species to bolster declining wild populations through conservation reintroductions. Within the managed population of sage-grouse, morbidity and mortality have primarily been associated with intestinal bacterial infections.
View Article and Find Full Text PDFSpecies geographic distribution and conservation priority areas are important bases for in situ biodiversity conservation and conservation decision-making. In view of the urgency of endangered species protection, eight representative endangered species in the typical forest ecosystem of the Greater and Lesser Khingan Mountains were studied. Based on 1127 occurrence points and environmental data collected from 2016 to 2021, used BIOMOD2 and Zonation to reconstruct the potential distribution area and identify conservation priority areas of eight species (, , , , , , , ).
View Article and Find Full Text PDFBMC Vet Res
January 2024
Department of Epizootiology with Exotic Animal and Bird Clinic, Wrocław University of Environmental and Life Sciences, Grunwaldzki Sq. 45, Wrocław, 50-366, Poland.
The purpose of this study was to characterize Escherichia coli (E. coli) strains isolated from wild black grouse (Lyrurus tetrix), carried out due to the crossing of hiking trails with wild bird habitats from the Karkonosze National Park. Twenty-seven E.
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