Blood parasite infection linked to condition of spring-migrating Lesser Scaup (Aythya affinis)

Loren Merrill, Jeffrey Levengood, J. Conner England, Joshua Osborn, Heath M. Hagy

Research output: Contribution to journalArticle

Abstract

Numerous organisms exhibit carry-over effects, in which previous environmental conditions impact current performance. For example, reproductive output for many migratory birds can be impacted by events during the preceding migration. Lesser Scaup (Aythya affinis (Eyton, 1838)-hereafter scaup) declined dramatically during 1970s–2000s, and there is evidence linking reduced reproductive output to reduced body condition during spring migration. In addition to food availability and quality, haemosporidian parasites (Plasmodium spp., Haemoproteus spp.) may be associated with condition of spring-migrating birds. We examined whether haemosporidian parasite infection status was linked to measures of size (mass, wing, tarsus and keel length) and condition (body fat, size-corrected mass, wing-load) in female spring-migrating scaup. Infection prevalence varied by year (21.7% in 2014; 47.1% in 2015), and percent body fat was negatively associated with the probability of infection. Body fat levels declined from ...
Original languageEnglish (US)
Pages (from-to)1145-1152
Number of pages8
JournalCanadian Journal of Zoology
Volume96
Issue number10
DOIs
StatePublished - 2018

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hemoparasite
body fat
fat
body condition
parasites
reproductive performance
blood
parasite
infection
Haemoproteus
food quality
Plasmodium
food availability
environmental conditions
bird
environmental factors
birds
organisms
Aythya

Keywords

  • INHS

Cite this

Blood parasite infection linked to condition of spring-migrating Lesser Scaup (Aythya affinis). / Merrill, Loren; Levengood, Jeffrey; England, J. Conner; Osborn, Joshua; Hagy, Heath M.

In: Canadian Journal of Zoology, Vol. 96, No. 10, 2018, p. 1145-1152.

Research output: Contribution to journalArticle

Merrill, Loren ; Levengood, Jeffrey ; England, J. Conner ; Osborn, Joshua ; Hagy, Heath M. / Blood parasite infection linked to condition of spring-migrating Lesser Scaup (Aythya affinis). In: Canadian Journal of Zoology. 2018 ; Vol. 96, No. 10. pp. 1145-1152.
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AB - Numerous organisms exhibit carry-over effects, in which previous environmental conditions impact current performance. For example, reproductive output for many migratory birds can be impacted by events during the preceding migration. Lesser Scaup (Aythya affinis (Eyton, 1838)-hereafter scaup) declined dramatically during 1970s–2000s, and there is evidence linking reduced reproductive output to reduced body condition during spring migration. In addition to food availability and quality, haemosporidian parasites (Plasmodium spp., Haemoproteus spp.) may be associated with condition of spring-migrating birds. We examined whether haemosporidian parasite infection status was linked to measures of size (mass, wing, tarsus and keel length) and condition (body fat, size-corrected mass, wing-load) in female spring-migrating scaup. Infection prevalence varied by year (21.7% in 2014; 47.1% in 2015), and percent body fat was negatively associated with the probability of infection. Body fat levels declined from ...

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