Analysis of the finescale timing of repeated signals: does shell rapping in hermit crabs signal stamina?

Article Abstract:

Shell rapping in hermit crabs, Pagurus bernhardus, is a costly activity that appears to signal capability, according to research making the first analysis of the within-bout temporal pattern of a repeated aggressive signal. There was a general trend for the gap duration to increase within a bout, but there was an initial decrease. It is possible that two raps are required to initiate a positive feedback that then permits more rapid movement. It appears that vigour and the stamina of the initiator are the main determinants of victory.

Aggressive behavior in animals, Hermit-crabs, Animal aggression, Hermit crabs

---

Rapid change in energy status in fighting animals: Causes and effects of strategic decisions

Article Abstract:

The energy status of fighting animals is related to the preceding activities by interrupting their fights at specific points. It is found that changes in physiological status appeared much earlier than the changes in behavior that they may have caused and some physiological changes might have affected rather than the cause of fight decisions.

Psychological aspects, Animal fighting

---

Do males of the great grey shrike, Lanius excubitor, trade food for extrapair copulations?

Article Abstract:

An investigation on the courtship feeding in the great prey shrike is presented. The results reveal that food offered by males to extrapair females has significantly higher energy value than that offered to the social mates.

Shrikes, Animal feeding behaviour, Animal feeding behavior

Similar abstracts:

• Abstracts: Atomic transient recorder. Optical pumping of a single hole spin in a quantum dot. Hybridization of electronic states in quantum dots through photon emission
• Abstracts: Landscape analysis of northern goshawk breeding home range in northern Japan. Riparian and upland breeding-bird assemblages along headwater streams in Michigan's Upper Peninsula
• Abstracts: Island of the clones. The evolution of aggregation in profitable and unprofitable prey. Mimicry on the edge
• Abstracts: Mechanics of the kinesin step. Kinesin steps back
• Abstracts: Broad-band optical parametric gain on a silicon photonic chip. All-optical control of light on a silicon chip

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.