Effect of territory quality on intrusion
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Lisa Marchesseault; Paul W. Ewald
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Article
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1991
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Springer
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English
โ 444 KB
Experimental reductions of productivity on feeding territories of Anna's hummingbirds (Calypte anna) decreased intrusion rate. This trend contrasts with the absence of strong correlations between intrusion rate and productivity in previous experimental studies. Consideration of sample sizes, product