ecological aspects of the dispersal behavior of Common Wall lizards, Podarcis muralis (laurenTi, 1768), were studied under the short-term effects of population density and individual body condition. The individual dispersal attitude was assessed by comparing emigration rates between two alternative scenarios of (i) moderate starting density (augmentation design) and (ii) high starting density (colonization design). The study system consisted of two interconnected seminatural enclosures simulating two habitat patches linked by corridors. The study revealed that the dispersal activity in the study species was influenced by the starting lizard density in the enclosures. The study species showed no dispersal behavior in the augmentation design and a densitydependent pattern in the colonization design. Moreover, males moved more frequently between enclosures than females, whereas neither sex nor body condition influenced the dispersal rate. Podarcis muralis showed behavioral similarity with P. siculus (raFinesque-sCHMalTZ, 1810), although for this latter species dispersion rate was found to be higher and movements between enclosures to start at lower population densities. unlike P. siculus, P. muralis exhibited different dispersal behavior at opposite density conditions: the lizards moved away from enclosures both highly crowded and unpopulated by conspecifics, i.e., avoided to stay longer in initially empty than in occupied enclosures.

Vignoli, L., Vuerich, V., Bologna, M.A. (2015). Experimental study of dispersal behavior in the Common Wall lizard, Podarcis muralis (Laurenti, 1768) (Squamata: Sauria: Lacertidae). HERPETOZOA, 27(3/4), 137-146.

Experimental study of dispersal behavior in the Common Wall lizard, Podarcis muralis (Laurenti, 1768) (Squamata: Sauria: Lacertidae).

Vignoli L;BOLOGNA, Marco Alberto
2015-01-01

Abstract

ecological aspects of the dispersal behavior of Common Wall lizards, Podarcis muralis (laurenTi, 1768), were studied under the short-term effects of population density and individual body condition. The individual dispersal attitude was assessed by comparing emigration rates between two alternative scenarios of (i) moderate starting density (augmentation design) and (ii) high starting density (colonization design). The study system consisted of two interconnected seminatural enclosures simulating two habitat patches linked by corridors. The study revealed that the dispersal activity in the study species was influenced by the starting lizard density in the enclosures. The study species showed no dispersal behavior in the augmentation design and a densitydependent pattern in the colonization design. Moreover, males moved more frequently between enclosures than females, whereas neither sex nor body condition influenced the dispersal rate. Podarcis muralis showed behavioral similarity with P. siculus (raFinesque-sCHMalTZ, 1810), although for this latter species dispersion rate was found to be higher and movements between enclosures to start at lower population densities. unlike P. siculus, P. muralis exhibited different dispersal behavior at opposite density conditions: the lizards moved away from enclosures both highly crowded and unpopulated by conspecifics, i.e., avoided to stay longer in initially empty than in occupied enclosures.
2015
Ökologische aspekte des ausbreitungsverhaltens der Mauereidechse, Podarcis muralis (laurenTi, 1768), wurden unter den kurzzeitbedingungen gegebener Populationsdichte und individueller Verfassung (bCi) untersucht. Die beurteilung der individuellen ausbreitungsbereitschaft erfolgte durch den Vergleich von emigrati - onsraten in zwei alternativen szenarien: (i) bei mäßiger anfangsdichte (augmentation design) und (ii) hoher anfangsdichte (colonization design). Die Versuchsanordnung bestand aus zwei durch korridore miteinander verbundenen, seminatürlichen enclosures, die zwei Vorkommensstellen simulierten. Die ausbreitungsaktivität der untersuchten art war von der anfänglichen Populationsdichte in den enclosures beeinflußt. Die Tiere zeigten kein ausbreitungsverhalten im Versuchsaufbau ‘augmentation’ und ein dichteabhängiges ausbreitungsverhalten im Versuchsaufbau ‘Colonization’. allerdings wechselten Männchen häufiger zwischen den enclosures als Weibchen, während weder das geschlecht noch die körperverfassung (bCi) die ausbreitungsrate beeinflußten. Dabei zeigte Podarcis muralis Verhaltensähnlichkeiten mit P. siculus (raFinesque-sCHMalTZ, 1810), obwohl bei letzterer art eine höhere Dispersionsrate festgestellt wurde, und die Wechsel zwischen den enclosures bei geringeren Populationsdichten einsetzten. anders als P. siculus zeigte P. muralis einheitliches Dispersionsverhalten bei gegensätzlichen Dichtebedingungen: dabei verließen P. muralis stark bevölkerte gebiete ebenso wie von artgenossen unbewohnte orte; sie vermieden es also, sich längere Zeit an ursprünglich von artgenossen nicht bewohnten als an bewohnten orten aufzuhalten.
Vignoli, L., Vuerich, V., Bologna, M.A. (2015). Experimental study of dispersal behavior in the Common Wall lizard, Podarcis muralis (Laurenti, 1768) (Squamata: Sauria: Lacertidae). HERPETOZOA, 27(3/4), 137-146.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/138252
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