Hemolytic parasites affect survival in migrating red-tailed hawks DOI

Christopher W. Briggs,

Kris A Dudus,

Teresa E. Ely

et al.

Conservation Physiology, Journal Year: 2022, Volume and Issue: 10(1)

Published: Jan. 1, 2022

Migrating birds face a myriad of hazards, including higher exposure to parasites and numerous competing energy demands. It follows that migration may act as selective filter limit population growth. Understanding how individual-level physiological condition disease status scale up dynamics through differential survival individuals is necessary identify threats management interventions for migratory populations, many which increasing conservation challenges. However, linking individual condition, parasite infection can be difficult. We examined the relationship among two measures [scaled-mass index heterophil/leukocyte (H/L) ratio], hematozoa (i.e. hemoparasites) presence abundance, constitutive immunity in 353 autumn migrating red-tailed hawks (Buteo jamaicensis calurus) from 2004 2018. Hematazoa Haemoproteus Leucocytozoon) were blood smears 139 (39.4%). H/L ratio decreased with scaled-mass index. Adults had significantly than juveniles. Our immune defences, hemolytic-complement activity bacteria-killing ability, highly positively correlated. most notable finding was negative between parasitemia documented mortality), indicating haemosporidian influence during challenging life stage. The effect on often debated, we provide evidence affect survival. In contrast, did not find trade-offs defences.

Language: Английский

Hemolytic parasites affect survival in migrating red-tailed hawks DOI

Christopher W. Briggs,

Kris A Dudus,

Teresa E. Ely

et al.

Conservation Physiology, Journal Year: 2022, Volume and Issue: 10(1)

Published: Jan. 1, 2022

Migrating birds face a myriad of hazards, including higher exposure to parasites and numerous competing energy demands. It follows that migration may act as selective filter limit population growth. Understanding how individual-level physiological condition disease status scale up dynamics through differential survival individuals is necessary identify threats management interventions for migratory populations, many which increasing conservation challenges. However, linking individual condition, parasite infection can be difficult. We examined the relationship among two measures [scaled-mass index heterophil/leukocyte (H/L) ratio], hematozoa (i.e. hemoparasites) presence abundance, constitutive immunity in 353 autumn migrating red-tailed hawks (Buteo jamaicensis calurus) from 2004 2018. Hematazoa Haemoproteus Leucocytozoon) were blood smears 139 (39.4%). H/L ratio decreased with scaled-mass index. Adults had significantly than juveniles. Our immune defences, hemolytic-complement activity bacteria-killing ability, highly positively correlated. most notable finding was negative between parasitemia documented mortality), indicating haemosporidian influence during challenging life stage. The effect on often debated, we provide evidence affect survival. In contrast, did not find trade-offs defences.

Language: Английский

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