The Effects of Population Density on Time Budgets of the Iberian Wall Lizard (Podarcis Hispanica)

Diego-Rasilla, Francisco Javier; Pérez-Mellado, Valentı́n

doi:10.1560/5rxj-t31k-wdnq-nx69

Cited by 6 publications

(3 citation statements)

References 46 publications

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“…We think, however, that this is not the case. While Valakos () found P. erhardii diets do change month‐to‐month, the proportion of the hardest taxa, gastropods and coleopterans, remained consistent throughout the lizards’ high‐activity months, March through July, when nutritional quality is of most importance for mate competition and egg growth (Valakos ; Diego‐Rasilla & Pérez‐Mellado ).…”

Section: Discussionmentioning

confidence: 98%

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Feed or fight: testing the impact of food availability and intraspecific aggression on the functional ecology of an island lizard

et al. 2015

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Summary Body size often varies among insular populations relative to continental conspecifics – the ‘island rule’ – and functional, context‐dependent morphological differences tend to track this body size variation on islands. Two hypotheses are often proposed as potential drivers of insular population differences in morphology: one relating to diet and the other involving intraspecific competition and aggression. We directly tested whether differences in morphology and maximum bite capacity were explained by interisland changes in hardness of both available and consumed prey, and levels of lizard‐to‐lizard aggression among small‐island populations. Our study included 11 islands in the Greek Cyclades and made use of a gradient in island area spanning five orders of magnitude. We focused on the widespread lizard Podarcis erhardii. We found that on smaller islands, P. erhardii body size was larger, head height was larger relative to body size, and maximum bite capacity became proportionally stronger. This pattern in morphology and performance was not related to differences in diet, but was highly correlated with proxies of intraspecific aggression – bite scars and missing toes. Our findings suggest that critical functional traits such as body size and bite force in P. erhardii follow the predictions of the island rule and are changing in response to changes in the competitive landscape across islands of different sizes.

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Section: Discussionmentioning

confidence: 98%

“…). Agonistic behaviour in lizards is correlated with increased competition for food, territory, mates and other resources (Diego‐Rasilla & Pérez‐Mellado ; Vervust et al . ).…”

Section: Introductionmentioning

confidence: 99%

Feed or fight: testing the impact of food availability and intraspecific aggression on the functional ecology of an island lizard

et al. 2015

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“…Moreover, the density variations inside each patch can affect lizard behaviour in various ways. Indeed, it is known that an increased patch density may provoke changes in time budget, lizards devoting more time to basking, altering the inter-individual interactions (DIEGO-RASILLA & PÉREZ-MELLADO 2000).…”

Section: Discussionmentioning

confidence: 99%

Experimental study of dispersal behaviour in a wall lizard species (Podarcis sicula) (Sauria Lacertidae)

Vignoli

Vuerich

Bologna

2012

Ethology Ecology & Evolution

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""Chemical communication is known to be of great importance in animals,. particularly in the dynamic processes involving social behaviours and spatial orientation.. Yet in many animal species exhibiting social behaviours, the mechanisms at. the base of interindividual recognition and spatial orientation are virtually unknown.. We addressed this issue in a series of laboratory experiments using Salamandrina. perspicillata, an Italian endemic salamander, by means of Y-maze test. Individuals. did not discriminate between the soil from the site of capture and other substrates.. Salamanders were able to recognise their own chemical cue by selecting the arm. housing the paper soaked in their body secretions, so demonstrating their capacity for. following a trail of their own chemical cues. No interindividual (either homosexual or. heterosexual) attraction was observed. Therefore, substrate-borne chemical cues produced. by conspecifics of S. perspicillata seem to have no sociosexual significance for. individuals from their own populations. Our results show a clear influence of chemical. cues on individual behaviour in S. perspicillata. Although our data reveal such a. behavioural trait, no evidence of gregariousness was found in the tested population."

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Definition and interpretation effects: how different vigilance definitions can produce varied results

Allan

Hill

2021

Animal Behaviour

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The Effects of Population Density on Time Budgets of the Iberian Wall Lizard (Podarcis Hispanica)

Cited by 6 publications

References 46 publications

Feed or fight: testing the impact of food availability and intraspecific aggression on the functional ecology of an island lizard

Feed or fight: testing the impact of food availability and intraspecific aggression on the functional ecology of an island lizard

Experimental study of dispersal behaviour in a wall lizard species (Podarcis sicula) (Sauria Lacertidae)

Definition and interpretation effects: how different vigilance definitions can produce varied results

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