Central monoamines in free-ranging lizards: differences associated with social roles and territoriality

Brain, Behavior and Evolution
J M MatterC H Summers

Abstract

During the breeding season different social classes of field-active lizards, Sceloporus jarrovi, exhibit regionally specific changes in central monoaminergic activation. Changes in serotonergic content and turnover between lizards from different social classes are seen in forebrain structures (telencephalon and diencephalon) and reflect events associated with reproductive behaviors, stress and aggression. Males without territories (satellite males) exhibit higher forebrain serotonin (5-HT) system activation compared to territorial males and adult females. This serotonergic activation includes increased 5-hydroxyindoleacetic acid (5-HIAA) and 5-HIAA/5-HT ratio, suggesting increased release and catabolism. Satellite males also exhibit higher 5-HIAA/5-HT ratios (serotonergic turnover) compared to territorial males following agonistic interactions. Territorial males, immediately following aggressive defense of territories against intruder males, exhibit increased 5-hydroxytryptophan (5-HTP) levels, higher 5-HIAA levels and 5-HIAA/5-HT ratio, higher epinephrine levels, greater MHPG/NE, more DOPAC and larger DOPAC/DA ratio compared to territorial males that did not have an aggressive encounter. These differences suggest activation of...Continue Reading

Citations

Sep 17, 2004·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Cliff H SummersNeil Greenberg
Sep 5, 2003·Physiology & Behavior·Neil Greenberg
Sep 5, 2003·Physiology & Behavior·Heidi A N PerreaultJohn Godwin
Jun 7, 2000·Behavioural Brain Research·A J EmersonC H Summers
Mar 29, 2001·Behavioural Brain Research·E T Larson, C H Summers
Feb 24, 2006·Behavioral Neuroscience·Wayne J KorzanCliff H Summers
Oct 20, 2001·Philosophy & Public Affairs·Agnieszka Jaworska
Jan 6, 2000·General and Comparative Endocrinology·C H SummersK J Renner
Oct 15, 2005·The American Naturalist·Andrés López-Sepulcre, Hanna Kokko
Oct 5, 2010·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·M Danielle McDonaldKatherine A Sloman
Oct 30, 2008·Physiology & Behavior·Travis J LingCliff H Summers
Feb 19, 2014·Biological Reviews of the Cambridge Philosophical Society·Konstantin ChichinadzeMarina Nikolaishvili
Nov 16, 2004·Brain Research·Katharine SemsarJohn Godwin
Oct 10, 2006·Neuroscience·I S Bharati, J L Goodson
Nov 22, 2005·European Journal of Pharmacology·Cliff H SummersOyvind Overli
Jan 23, 2003·Microscopy Research and Technique·Jules B PankseppRobert Huber
Jul 3, 2007·Behavioural Brain Research·Wayne J KorzanCliff H Summers
May 20, 2017·Integrative and Comparative Biology·Chelsea A WeitekampHans A Hofmann
Nov 14, 2008·The Journal of Biological Chemistry·Chanki KimHee-Sup Shin
Sep 14, 2013·The Journal of Experimental Biology·Manuel GestoJesús M Míguez
Jun 22, 2013·The Journal of Experimental Biology·Karen P MaruskaRussell D Fernald
Nov 23, 2006·The Journal of Experimental Biology·Cliff H Summers, Svante Winberg
May 18, 2021·Neurobiology of Stress·Wayne J Korzan, Cliff H Summers

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