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1 March 2018 Age- and Condition-dependent Mortality of Common Tern (Sternahirundo) Chicks During a Heavy Rainfall Event
Kamila Gach, Tomasz Janiszewski, Radosław Włodarczyk, Bartosz Lesner, Piotr Minias
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Abstract

The aim of this study was to evaluate which factors determined immediate mortality of Common Tern (Sterna hirundo) chicks during a heavy rainfall. On 26 June 2013, a heavy rainfall event was recorded at an inland colony of Common Terns in central Poland that resulted in the death of ~30% of the chicks. The highest mortality rate was recorded in the youngest age group (1–8 days). Probability of surviving the rainfall increased 1.47 (95% CI: 1.25–1.83) times with each additional day. There was also a positive relationship between survival probability and mass-size residuals of chicks (β = 0.17 ± 0.07, P = 0.025). This study provides evidence for age-and condition-dependent mortality of semi-precocial chicks during an extreme weather event.

Kamila Gach, Tomasz Janiszewski, Radosław Włodarczyk, Bartosz Lesner, and Piotr Minias "Age- and Condition-dependent Mortality of Common Tern (Sternahirundo) Chicks During a Heavy Rainfall Event," Waterbirds 41(1), 63-67, (1 March 2018). https://doi.org/10.1675/063.041.0108
Received: 12 December 2016; Accepted: 1 January 2017; Published: 1 March 2018
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KEYWORDS
Common Tern
extreme weather
mass-size residuals
mortality rate
Sterna hirundo
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