Early impact of west nile virus on the yellow-billed magpie (Pica Nuttalli)

Scott P. Crosbie, Walter D. Koenig, William Reisen, Vicki L. Kramer, Lauren Marcus, Ryan Carney, Edward Pandolfino, Ginger M. Bollen, Lizette R. Crosbie, Douglas A. Bell, Holly B Ernest

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Several sources of data suggest that the Yellow-billed Magpie (Pica nuttalli), a corvid endemic to California, is extremely susceptible to West Nile virus (WNV) and that its abundance has decreased since the establishment of WNV throughout California in 2004. From 2004 to 2006, 12,211 Yellow-billed Magpie carcasses were reported to the California Department of Health Services. Seventy-eight percent of the 1,007 Yellow-billed Magpie carcasses tested were WNV-positive, and this was the highest proportion of WNV-positive carcasses of all California bird species with reasonable sample sizes (>20). Assuming a starting population size of 180,000 in 2003, California Department of Health Services data suggest that Yellow-billed Magpie populations may have been reduced by 49% in just two years. Breeding Bird Survey (BBS) data show a 22% decline as of 2005, and Christmas Bird Count (CBC) data show a 42% decline as of 2006. Furthermore, flock size at three traditional urban communal roosts monitored in Sacramento, California, decreased dramatically after the establishment of WNV, with two becoming vacant by summer 2005 and the third declining precipitously into 2006. Of 38 serum samples obtained from 21 Yellow-billed Magpies in Davis, California, in 2006, only one individual was found to produce WNV-specific antibodies. Range-wide monitoring is warranted to detect and track population trends of this species. Population size, genetic diversity and population structure, cause-specific mortality, and population viability should be evaluated.

Original languageEnglish (US)
Pages (from-to)542-550
Number of pages9
JournalAuk
Volume125
Issue number3
DOIs
StatePublished - 2008

Fingerprint

West Nile virus
health services
population size
birds
antibody
population structure
Pica nuttalli
serum
viability
flocks
bird
mortality
sampling
summer
genetic variation
monitoring
antibodies
breeding

Keywords

  • Breeding Bird Survey
  • Christmas Bird Count
  • Communal roost
  • Corvidae
  • Dead-bird surveillance
  • Pica nuttalli
  • West Nile virus
  • Yellow-billed Magpie

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Ecology, Evolution, Behavior and Systematics

Cite this

Crosbie, S. P., Koenig, W. D., Reisen, W., Kramer, V. L., Marcus, L., Carney, R., ... Ernest, H. B. (2008). Early impact of west nile virus on the yellow-billed magpie (Pica Nuttalli). Auk, 125(3), 542-550. https://doi.org/10.1525/auk.2008.07040

Early impact of west nile virus on the yellow-billed magpie (Pica Nuttalli). / Crosbie, Scott P.; Koenig, Walter D.; Reisen, William; Kramer, Vicki L.; Marcus, Lauren; Carney, Ryan; Pandolfino, Edward; Bollen, Ginger M.; Crosbie, Lizette R.; Bell, Douglas A.; Ernest, Holly B.

In: Auk, Vol. 125, No. 3, 2008, p. 542-550.

Research output: Contribution to journalArticle

Crosbie, SP, Koenig, WD, Reisen, W, Kramer, VL, Marcus, L, Carney, R, Pandolfino, E, Bollen, GM, Crosbie, LR, Bell, DA & Ernest, HB 2008, 'Early impact of west nile virus on the yellow-billed magpie (Pica Nuttalli)', Auk, vol. 125, no. 3, pp. 542-550. https://doi.org/10.1525/auk.2008.07040
Crosbie SP, Koenig WD, Reisen W, Kramer VL, Marcus L, Carney R et al. Early impact of west nile virus on the yellow-billed magpie (Pica Nuttalli). Auk. 2008;125(3):542-550. https://doi.org/10.1525/auk.2008.07040
Crosbie, Scott P. ; Koenig, Walter D. ; Reisen, William ; Kramer, Vicki L. ; Marcus, Lauren ; Carney, Ryan ; Pandolfino, Edward ; Bollen, Ginger M. ; Crosbie, Lizette R. ; Bell, Douglas A. ; Ernest, Holly B. / Early impact of west nile virus on the yellow-billed magpie (Pica Nuttalli). In: Auk. 2008 ; Vol. 125, No. 3. pp. 542-550.
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abstract = "Several sources of data suggest that the Yellow-billed Magpie (Pica nuttalli), a corvid endemic to California, is extremely susceptible to West Nile virus (WNV) and that its abundance has decreased since the establishment of WNV throughout California in 2004. From 2004 to 2006, 12,211 Yellow-billed Magpie carcasses were reported to the California Department of Health Services. Seventy-eight percent of the 1,007 Yellow-billed Magpie carcasses tested were WNV-positive, and this was the highest proportion of WNV-positive carcasses of all California bird species with reasonable sample sizes (>20). Assuming a starting population size of 180,000 in 2003, California Department of Health Services data suggest that Yellow-billed Magpie populations may have been reduced by 49{\%} in just two years. Breeding Bird Survey (BBS) data show a 22{\%} decline as of 2005, and Christmas Bird Count (CBC) data show a 42{\%} decline as of 2006. Furthermore, flock size at three traditional urban communal roosts monitored in Sacramento, California, decreased dramatically after the establishment of WNV, with two becoming vacant by summer 2005 and the third declining precipitously into 2006. Of 38 serum samples obtained from 21 Yellow-billed Magpies in Davis, California, in 2006, only one individual was found to produce WNV-specific antibodies. Range-wide monitoring is warranted to detect and track population trends of this species. Population size, genetic diversity and population structure, cause-specific mortality, and population viability should be evaluated.",
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