114 research outputs found
The efficiency of DNA extraction kit and the efficiency of recovery techniques to release DNA using flow cytometry.
Communication in the Third Dimension: Song Perch Height of Rivals Affects Singing Response in Nightingales
Many animals use long-range signals to compete over mates and resources. Optimal transmission can be achieved by choosing efficient signals, or by choosing adequate signalling perches and song posts. High signalling perches benefit sound transmission and reception, but may be more risky due to exposure to airborne predators. Perch height could thus reflect male quality, with individuals signalling at higher perches appearing as more threatening to rivals. Using playbacks on nightingales (Luscinia megarhynchos), we simulated rivals singing at the same height as residents, or singing three metres higher. Surprisingly, residents increased song output stronger, and, varying with future pairing success, overlapped more songs of the playback when rivals were singing at the same height than when they were singing higher. Other than expected, rivals singing at the same height may thus be experienced as more threatening than rivals singing at higher perches. Our study provides new evidence that territorial animals integrate information on signalling height and thus on vertical cues in their assessment of rivals
Seasonal differences in at-sea activity of seabirds underline high energetic demands during the breeding period
Immune responses link parasite genetic diversity, prevalence and plumage morphs in common buzzards
(Mittheilungen aus dem Laboratorium von E. von Meyer). III. Abhandlung. Ueber dimolekulares Cyanmethyl
Mittheilungen über die Anilide, Methylanilide und Aethylanilide der Benzol- und Paratoluolsulfonsäure, über Phenyl- und Paratolylsulfonoxysulfobenzid
Une contribution à propos de la nature et de l'abondance des proies pendant l'éducation des jeunes chez l'Epervier (Accipiter nisus nisus L.)
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