Behavioral Profile of Free-Ranging Male Lizards, Anolis carolinensis, across Breeding and Post-Breeding Seasons

Jenssen, Thomas A.; Greenberg, Neil; Hovde, Katheryn A.

doi:10.2307/1466995

Cited by 141 publications

(106 citation statements)

References 42 publications

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“…For instance, a color change from green to brown, or darkening involving speckling and the appearance of a small "eyespot" just behind the eye, indicate specific patterns of activation of alpha-2 and beta-2 adrenoceptors and MSH. Despite early beliefs about the background adaptation in A. carolinensis [75], more recent studies in the field indicate that body color is most typically affected by social activities [76]. The aggregation of melanin granules within Anolis melanophores in response to sympathomimetic stimulation is regulated by alpha adrenergic receptors, whereas their dispersion is controlled through the beta adrenergic receptors of the melanophores.…”

Section: The Pharmacology Of Adrenoceptorsmentioning

confidence: 99%

Vertebrate melanophores as potential model for drug discovery and development: A review

Salim¹,

Ali²

2011

Cellular and Molecular Biology Letters

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Drug discovery in skin pharmacotherapy is an enormous, continually expanding field. Researchers are developing novel and sensitive pharmaceutical products and drugs that target specific receptors to elicit concerted and appropriate responses. The pigment-bearing cells called melanophores have a significant contribution to make in this field. Melanophores, which contain the dark brown or black pigment melanin, constitute an important class of chromatophores. They are highly specialized in the bidirectional and coordinated translocation of pigment granules when given an appropriate stimulus. The pigment granules can be stimulated to undergo rapid dispersion throughout the melanophores, making the cell appear dark, or to aggregate at the center, making the cell appear light. The major signals involved in pigment transport within the melanophores are dependent on a special class of cell surface receptors called G-protein-coupled receptors (GPCRs). Many of these receptors of adrenaline, acetylcholine, histamine, serotonin, endothelin and melatonin have been found on melanophores. They are believed to have clinical relevance to skin-related ailments and therefore have become targets for high throughput screening projects. The selective screening of these receptors requires the recognition of particular ligands, agonists and antagonists and the characterization of their effects on pigment motility within the cells. The mechanism of skin pigmentation is incredibly intricate, but it would be a considerable step forward to unravel its underlying physiological mechanism. This would provide an experimental basis for new pharmacotherapies for dermatological anomalies.

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Section: The Pharmacology Of Adrenoceptorsmentioning

confidence: 99%

Vertebrate melanophores as potential model for drug discovery and development: A review

Salim¹,

Ali²

2011

Cellular and Molecular Biology Letters

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“…Social antagonism between closely adjacent male A. carolinensis is rarely observed in a natural setting [28,30]. However, male A. carolinensis partition the natural habitat by means of intense territorial contests and enduring rivalry [29].…”

Section: Agonistic Behavior and Social Status Response To A Second Somentioning

confidence: 99%

Memory of opponents is more potent than visual sign stimuli after social hierarchy has been established

Korzan

Höglund²,

Watt

et al. 2007

Behavioural Brain Research

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During agonistic interactions between male Anolis carolinensis, perception of a visual sign stimulus (darkened eyespots) not only inhibits aggression and promotes initial attainment of dominant social status, but also evokes distinct neuroendocrine responses in each opponent. This study was designed to examine the effect of eyespot manipulation on behavior and social rank during a second interaction between opponents that had previously established a natural dyadic social hierarchy. Prior to a second interaction, eyespots of familiar size-matched combatants were manipulated to reverse information conveyed by this visual signal. Eyespots on the previously dominant male were masked with green paint to indicate low aggression and social status. Previously subordinate males had their eyespots permanently marked with black paint to convey high aggression and status. Opponents were then repaired for a second 10 min interaction following either one or three days of separation. Aggression was generally decreased and social status between pairs remained reasonably consistent. Unlike rapidly activated monoaminergic activity that occurs following the initial pairing, most brain areas sampled were not affected when animals were re-introduced, regardless of visual signal reversal or length of separation between interactions. However in males with "normal" eyespot color, dominant males had reduced serotonergic activity in CA 3 and raphé, while subordinate males exhibited elevated CA 3 dopaminergic activity. Reversing eyespot color also reversed serotonergic activity in raphé and dopaminergic activity in CA 3 after three days of separation. The results suggest that males remember previous opponents, and respond appropriately to their previous social rank in spite of eyespot color.

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“…Among the ecomorph classes, trunk-crown anoles are ecologically the most flexible in that they use a wide variety of structural habitats (e.g. Collette, 1961;Moermond, 1979b;Losos, 1990b;Jenssen, Greenberg & Hovde, 1995) and hence might be most likely to evolve in simple anole communities. In addition, two fossil anoles preserved in amber from Miocene deposits in the Dominican RepubHc appear indistinguishable from trunk-crown anoles (Rieppel, 1980;de Queiroz, Chu & Losos, in prep.…”

Section: An Alternative Hypothesismentioning

confidence: 99%

Evolutionary consequences of ecological release in CaribbeanAnolislizards

Losos

1997

Biological Journal of the Linnean Society

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Behavioral Profile of Free-Ranging Male Lizards, Anolis carolinensis, across Breeding and Post-Breeding Seasons

Cited by 141 publications

References 42 publications

Vertebrate melanophores as potential model for drug discovery and development: A review

Vertebrate melanophores as potential model for drug discovery and development: A review

Memory of opponents is more potent than visual sign stimuli after social hierarchy has been established

Evolutionary consequences of ecological release in CaribbeanAnolislizards

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