Effects of an Individual's Removal on Space Use and Behavior in Territorial Neighborhoods of Brown Anoles (Anolis Sagrei)

Paterson, Ann V.

doi:10.1655/0018-0831(2002)058[0382:eoairo]2.0.co;2

Cited by 27 publications

(20 citation statements)

References 27 publications

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“…However, both scenarios could be consistent with the hypothesis that male–male competition limits dispersal if small males filled vacancies left by dead residents, whereas large males usurped territories from smaller neighbours. Experimental studies with A. sagrei have shown that the stability of territory boundaries may be mediated through the dear enemy effect (Paterson 2002; Calsbeek & Marnocha 2006) whereby neighbour recognition reduces the costs of territory defence. Moreover, removing territory residents increases rates of territory takeover by males on nearby territories (Paterson 2002).…”

Section: Discussionmentioning

confidence: 99%

“…Experimental studies with A. sagrei have shown that the stability of territory boundaries may be mediated through the dear enemy effect (Paterson 2002; Calsbeek & Marnocha 2006) whereby neighbour recognition reduces the costs of territory defence. Moreover, removing territory residents increases rates of territory takeover by males on nearby territories (Paterson 2002). These results further support the hypothesis that dispersal by males is limited by interactions with other males.…”

Section: Discussionmentioning

confidence: 99%

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Sex‐specific adult dispersal and its selective consequences in the brown anole,Anolis sagrei

Calsbeek¹

2009

Journal of Animal Ecology

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Summary 1.Dispersal behaviour is a potentially risky life-history strategy that can impact habitat use as well as competition over territories and mates. 2. I studied natural selection on dispersal behaviour over the course of four breeding seasons in a Bahamian population of brown anoles ( Anolis sagrei ). 3. Both males and females showed extremely high site fidelity over the course of each reproductive season. Movement distance in males was negatively correlated with body size at first capture in spring (small males dispersed further). Moreover, differences in body size between dispersing males and the body size of the male territory residents that they replaced were correlated with the distance that males dispersed. Relatively larger males dispersed shorter distances compared with relatively smaller males. There was no relationship between dispersal distance and body size in females. However, females were more likely to disperse away from areas of low female density and into areas of higher female density, and female dispersal distances were negatively correlated with the number of female neighbours at the site of capture in spring (before dispersal). 4. These data suggest that, whereas male dispersal is driven by inter-male competition, female dispersal is more likely related to variation in territory quality. 5. Natural selection acted on dispersal distance in conjunction with male, but not female body size. Although smaller males were the more likely to disperse, these males paid a high cost in terms of viability indicating that dispersal is a potentially risky strategy.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Sex‐specific adult dispersal and its selective consequences in the brown anole,Anolis sagrei

Calsbeek¹

2009

Journal of Animal Ecology

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“…Only one such dispersal event was recorded and the mean distance moved over the four months of study was 1.94 m ± 0.34. In general, brown anoles are very sedentary (Paterson 2002) and were often resighted on the same perch site on consecutive days. We only report selection on habitat use for Kidd cay, because lizards on offshore cays were experimentally introduced, and habitat use at capture did not reflect habitat use for the period during which we measured viability selection.…”

Section: Methodsmentioning

confidence: 99%

The Quick and the Dead: Correlational Selection on Morphology, Performance, and Habitat Use in Island Lizards

Calsbeek¹,

Irschick²

2007

Evolution

195

194

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Natural selection is an important driver of microevolution. Yet, despite significant theoretical debate, we still have a poor understanding of how selection operates on interacting traits (i.e., morphology, performance, habitat use). Locomotor performance is often assumed to impact survival because of its key role in foraging, predator escape, and social interactions, and shows strong links with morphology and habitat use within and among species. In particular, decades of study suggest, but have not yet demonstrated, that natural selection on locomotor performance has shaped the diversification of Anolis lizards in the Greater Antilles.Here, we estimate natural selection on sprinting speed and endurance in small replicate island populations of Anolis sagrei. Consistent with past correlational studies, long-limbed lizards ran faster on broad surfaces but also had increased sprint sensitivity on narrow surfaces. Moreover, performance differences were adaptive in the wild. Selection favored long-limbed lizards that were fast on broad surfaces, and preferred broad substrates in nature, and also short-limbed lizards that were less sprint sensitive on narrow surfaces, and preferred narrow perches in nature. This finding is unique in showing that selection does not act on performance alone, but rather on unique combinations of performance, morphology, and habitat use. Our results support the long-standing hypothesis that correlated selection on locomotor performance, morphology, and habitat use drives the evolution of ecomorphological correlations within Caribbean Anolis lizards, potentially providing a microevolutionary mechanism for their remarkable adaptive radiation.

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“…1998, 2002). Male A. sagrei are known to court females in adjacent territories (Tokarz 1998), and will opportunistically take over territory space following removal of rival males (Paterson 2002). The goal of this study was to test whether the intensity of territory defense differed between elevated perching sites and sites on the ground.…”

Section: Introductionmentioning

confidence: 99%

Context Dependent Territory Defense: The Importance of Habitat Structure in Anolis sagrei

Calsbeek

Marnocha

2006

Ethology

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Territoriality is a potentially costly endeavor, and several mechanisms for mitigating the costs of territoriality have been investigated in the wild. For example, territory owners can reduce the costs of defending territory boundaries by prioritizing defense of the most valuable areas within territories, investing less energy in low quality areas. We staged pairwise encounters between adult male lizards on natural territories in the wild, to test whether male brown anoles, Anolis sagrei, would differentially defend certain regions of their territories over others. Based on our observations that male A. sagrei spend most of their time on elevated perches on tree trunks or branches compared with sites on the ground, we predicted that territory residents would respond more aggressively to territory invasions that took place on elevated perches than to invasions on the ground. We measured significant differences in the behavior of residents following invasion on the ground vs. on the elevated perches, and results partially supported our hypothesis. Males performed more displays and approached intruders more often when territory invasion took place on the ground, but were quicker to attack intruders that entered territories on elevated perches. Our hypothesis was only partially supported, potentially indicating that elevated perches are preferred as outposts to monitor valuable sites on the ground. Our study provides evidence that territory defense varies not just among individuals, but also within individuals at different locations in a territory.

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Effects of an Individual's Removal on Space Use and Behavior in Territorial Neighborhoods of Brown Anoles (Anolis Sagrei)

Cited by 27 publications

References 27 publications

Sex‐specific adult dispersal and its selective consequences in the brown anole,Anolis sagrei

Sex‐specific adult dispersal and its selective consequences in the brown anole,Anolis sagrei

The Quick and the Dead: Correlational Selection on Morphology, Performance, and Habitat Use in Island Lizards

Context Dependent Territory Defense: The Importance of Habitat Structure in Anolis sagrei

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