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Does Blood Sampling Ring-Billed Gulls Increase Parental Desertion and Chick Mortality?
Kevin M. Brown
Vol. 18, No. 1 (1995), pp. 102-104
Published by: Waterbird Society
Stable URL: http://www.jstor.org/stable/1521405
Page Count: 3
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I evaluated consequences of collecting blood samples from adults and chicks at a Ring-billed Gull (Larus delawarensis) colony on Lake Erie in 1992. The capture and blood sampling of 105 adult gulls did not cause permanent nest abandonment and adults returned to their nests in 17.7 ± 16.9 mins (X̄ ± 1SD). Between 100-150 ul of blood was taken from the jugular vein of 110 chicks within nine days post hatch (mean chick age + 1SD = 2.8 ± 1.8 d). While two chicks died as a result of blood sampling, there was no significant difference between the number of chicks surviving to 21 days in broods where blood was taken from chicks and controls (P > 0.1). These results indicate minimal effect of the procedure.
Colonial Waterbirds © 1995 Waterbird Society