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Table 2.

Thin-billed prion homing performance, immediate and global homing success after zinc sulphate treatment

Day after the release
Treatment0123LaterLostTotalIHSGHS
Saline 10 10 0.60 
ZnSO4 (2 %) 0.14** 0.78* 
ZnSO4 (4 %) 10 0*** 0.60** 
Day after the release
Treatment0123LaterLostTotalIHSGHS
Saline 10 10 0.60 
ZnSO4 (2 %) 0.14** 0.78* 
ZnSO4 (4 %) 10 0*** 0.60** 

IHS, immediate homing success; GHS, global homing success (one-tailed G-test). *P<0.05, **P<0.01, ***P<0.001. Asterisks indicate a significant difference of either ZnSO4 group from the control (saline) value.

For each day values represent numbers of birds present in the nest(cumulative frequency).

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