Reliable signalling need not be a handicap
Article Abstract:
The common notion concerning the Handicap Principle that signal size and sender quality are correlated because low-quality signallers cannot afford bigger signals is refuted. Despite it being a reasonable interpretation, the Handicap Principle is more than what is necessary in reliable signalling. The basic requisite for reliable signalling of quality is the efficiency principle, which is characterized by greater sensitivity of the fitness of higher-quality signallers to advertising. It states that converting advertising into fitness is more efficient among higher-quality signallers.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1998
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Mate selection by repeated inspection: more on pied flycatchers
Article Abstract:
The signal detection theory framework provides useful insights into deceptive signalling in poly territorial birds, such as the pied flycatchers. The quantitative model of discrimination developed by S. Dale and T. Slagsvold explains the male mating status based on the continuous sampling of territories by females. The model evaluates the difference between the correctly rejecting mated and the incorrectly rejecting un-mated males. This model suggests that female pied flycatchers must reduce territorial inspection and accept only those males present at every inspection.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1996
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Behavioural and hormonal responses of the pied flycatcher to environmental stressors
Article Abstract:
The levels of cortisone and testosterone and the behavior of pied flycatchers in the presence and absence of environmental stress were determined during territorial establishment and nesting to investigate the response of these birds to stress. Among the environmental stresses investigated are intruders, predators and handling. Results reveal that stress effects on corticosterone and testosterone levels are independent from each other.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1998
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