Summers Lab

Laboratory of Molecular Neuropsychoecoendochemistry

Summers Lab Home        Investigators              Research         Publications: from studies on: Fish, Lizards, Rodents: with student co-authorship          Cliff Summers                    

Neuroscience Group at USD                     Biology Department                     Summers' Biology Webpage                     Summers' Course Offerings                     Contact Us                     USD

Ronan PJ, WJ Korzan, PL Johnson, CA Lowry, KJ Renner, CH Summers 2023 Prior stress and vasopressin 
	promote corticotropin-releasing factor inhibition of serotonin release in the central nucleus 
	of the amygdala. Frontiers in Behavioral Neuroscience 17: 1148292: 1-14

Carpenter RE, B Sabirzhanov, TR Summers, TG Clark, J Keifer and CH Summers 2023 Anxiolytic reversal of classically conditioned / 
	chronic stress-induced gene expression and learning in the stress alternatives model. Behavioural Brain Research 
	114258: 440: 1-10 
Yaeger JDW, KT Krupp, TR Summers, CH Summers 2022 Contextual generalization of social stress learning is modulated by
	orexin receptors in basolateral amygdala. Neuropharmacology 215: 109168:1-12

Yaeger JDW, KT Krupp, BM Jacobs, BO Onserio, BL Meyerink,  JT Cain, PJ Ronan, KJ Renner, RJ DiLeone, CH Summers  2022 
	Orexin 1 receptor antagonism in basolateral amygdala shifts the balance from pro- to anti-stress signaling and behavior. 
	Biological Psychiatry 91: 841-852

Korzan WJ and CH Summers 2021 Evolution of stress responses refine mechanisms of social rank. 
	Neurobiology of Stress 100328: 1-19

Keifer J and CH Summers 2021 The Neuroscience Community has a role in environmental conservation.
	 eNeuro 8:ENEURO.0454-20.2021 1–5

Pang T, JDW Yaeger, CH Summers, and R Mitra 2021 Cardinal role of the environment in stress induced changes
	across life stages and generations. Neuroscience and Biobehavioral Reviews 124: 137-150 

Korzan WJ, TR Summers and CH Summers 2021 Neural and endocrine responses to social stress differ during actual and virtual aggressive 
	interactions or physiolgical sign stimuli. Biological Processes 182: 104294: 1-10

Yaeger JDW, KT Krupp, JJ Gale, CH Summers 2020 Counter-balanced microcircuits for Orx1 and Orx2 regulation
	of stress reactivity. Medicine in Drug Discovery 100059:  1-20

Summers CH, JDW Yaeger, CD Staton, DH Arendt, TR Summers 2020 Orexin/hypocretin receptor modulation of anxiolytic and antidepressive 
	responses during social stress and decision-making: potential for therapy. Brain Research 1731: 146085: 1-15

Robertson JM, AR Cahlander-Mooers, CH Summers and MD Dixon 2019 Population condition of Populus xsmithii, 
	a pleistocene relict aspen of the Niobrara River valley, Nebraska, USA. Natural Areas Journal 39: 286-296 

Staton CD, JDW Yaeger, DD Khalid, F Haroun, BS Fernandez, JS Fernandez, BK Summers, TR Summers, M Sathyanesan, SS Newton, CH Summers 
	2018 Orexin 2 receptor stimulation enhances resilience, while orexin 2 inhibition promotes susceptibility, to social stress, anxiety and
	depression. Neuropharmacology 143: 79-94.

Pearson BL, JN Crawley, D Eilam, NS Pentkowski, CH Summers 2017 Curiosity as an approach to 
	ethoexperimental analysis: Behavioral neuroscience as seen by students and colleagues of Bob Blanchard. 
	Neuroscience & Biobehavioral Reviews 76: 415-422

Robertson JM, JK Achua, JP Smith, MA Prince, CD Staton, PJ Ronan, TR Summers, CH Summers 2017 Anxious behavior induces 
	elevated hippocampal Cb2 receptor gene expression.  Neuroscience 352: 273-284

Summers TR, TL Summers,  RE Carpenter,  JP Smith,  SL Young,  B Meyerink,  TZ Orr,  DH Arendt, and  CH Summers 2017 Learning and CRF-induced 
	indecision during escape and submission in rainbow trout during socially aggressive interactions in the Stress-Alternatives Model
	Frontiers in Neuroscience 11: 515: 1-13

Keifer J and CH Summers 2016 Putting the "biology" back into "neurobiology: The strength of
	diversity in animal model systems for neuroscience research Front Syst Neurosci 10: 69: 1-9

Smith JP, MA Prince, JK Achua, JM Robertson, RT Anderson, PJ Ronan, and CH Summers 2016 Intensity of anxiety is modified via complex
 	integrative stress circuitries. Psychoneuroendocrinology 63: 351-361

Waters RP, M Rivalan, D Bangasser, J Deussing, M Ising, SK Wood, F Holsboer, CH Summers 2015 Evidence for the role of 
	corticotropin-releasing factor in major depression disorder Neuroscience & Biobehavioral Reviews 63: 351-361

Robertson JM, MA Prince, JK Achua, RE Carpenter, DH Arendt, JP Smith, TL Summers, TR Summers, and CH Summers 2015 Nuance and behavioral	
	cogency: How the Visible Burrow System inspired the Stress-Alternatives Model and conceptualization of the continuum of anxiety. 	
	Physiology and Behavior 146: 86-97

Arendt DH, J Hassell, Hao Li, JK Achua, DJ Guarnieri, RJ DiLeone, PJ Ronan, and CH Summers 2014
  	Anxiolytic function of the orexin 2 /hypocretin A receptor in the basolateral amygdala.
 	Psychoneuroendocrinology 40C: 17-26

Smith JP, JK Achua, TR Summers, PJ Ronan and CH Summers 2014 Neuropeptide S and BDNF gene 
	expression in the amygdala are influenced by social decision-making under stress. 
	Front Behav Neurosci 8:121: 1-13 doi: 10.3389/fnbeh.2014.00121

Arendt DH, PJ Ronan, KD Oliver, LB Callahan,TR Summers and CH Summers 2013 Depressive
 	behavior and activation of the orexin/hypocretin system Behav Neurosci 127:86-94

Blanchard DC, CH Summers, and RJ Blanchard 2013 The role of behavior in translational models
	for psychopathology: Functionality and dysfunctional behaviors. Neuroscience and 
	Biobehavioral Reviews 37: 1567-1577
Ricci L+, CH Summers+, Larson ET+, D O’Malley and RH Melloni 2013 Development of aggressive phenotypes: 
	Interactions of age, experience, and social status. Animal Behaviour 86: 245-252 +equal contribution

Arendt DH, JP Smith, CC Bastida, M Prasad, KD Oliver,  KM Eyster, TR Summers, Y Delville
	and CH Summers 2012 Contrasting hippocampal and amygdalar expression of genes related 
	to neural plasticity during escape from social aggression. Phys Behav 107:670-679

Sørensen C, GE Nilsson, CH Summers and Ø Øverli 2011 Social stress reduces forebrain 
	cell proliferation in rainbow trout (Oncorhynchus mykiss). 
	Behav Brain Res 227: 311-318 

Ronan PJ and CH Summers 2011 Molecular signaling and translational significance of
	the corticotropin releasing factor system - Chap 6 In Progress in Molecular Biology  
	and Translational Science Vol 98 The Brain as a Drug Target, S Rahman ed,  
	Academic Press, Burlington pp. 235-292
Clotfelter ED, MM McNitt, RE Carpenter and CH Summers 2010 Modulation of monoamine 
	neurotransmitters in fighting fish Betta splendens exposed to waterborne 
	phytoestrogens Fish Physiol Biochem 36: 933-943
Ling TJ, CH Summers, KJ Renner and MJ Watt 2010 Opponent recognition and social status 
	differentiate rapid neuroendocrine responses to social challenge 
	Physiol Behav 99: 571-578
Tokarz RR and CH Summers 2010 Stress and Reproduction in Reptiles In Hormones  
	and Reproduction of Vertebrates, Vol 3 - Reptiles, DO Norris, KH Lopez eds,   
	Elsevier, San Diego, Chapter 7 pp. 169-213
Waters RP, KJ Renner, CH Summers, MJ Watt, GL Forster, LG Koch, SL Britten, JG Swallow 2010 
	Selection for intrinsic endurance modifies endocrine stress responsiveness Brain Res 1357: 53-61

Carpenter RE and CH Summers 2009 Learning strategies during fear conditioning 
	Neurobiology of Learning and Memory 91: 415-423

Carpenter RE, WJ Korzan, C Bockholt, MJ Watt, GL Forster, KJ Renner and CH Summers 
	2009 Corticotropin releasing factor influences aggression and monoamines: 
	Modulation of attacks and retreats. Neuroscience 158: 412-425 

Ling TJ, GL Forster, MJ Watt, WJ Korzan, KJ Renner and CH Summers 2009 Social status
	differentiates rapid neuroendocrine responses to restraint stress. 
	Physiol & Behav 96: 218-232
Lorenzi V, RE Carpenter, CH Summers, RL Earley and MS Grober 2009 Serotonin, social status and 
	sex change in the bluebanded goby Lythrypnus dalli. Physiol Behav 97:  476-483

Lowry CA, MW Hale, A Plant, RJ Windle, N Shanks, SA Wood, CD Ingram, KJ Renner, S Lightman
	and CH Summers  2009 Fluoxetine inhibits corticotropin-releasing factor (CRF-induced 
	behavioural responses 	in rats. Stress 12: 225-239

Lukkes JL, CH Summers, JL Scholl, KJ Renner and GL Forster 2009 Early life social 
	isolation alters corticotropin-releasing factor responses in adult rats 
	Neuroscience 158: 845-855

Shaw JC, WJ Korzan, RE Carpenter, AM Kuris, KD Lafferty, CH Summers, Ø Øverli 2009 
	Parasite manipulation of brain monoamines in California killifish (Fundulus parvipinnis) 
	by the trematode Euhaplorchis californiensis. Proc R Soc B 276: 1137-1146
Forster GL, RB Pringle, NJ Mouw, SM Vuong, MJ Watt, AR Burke, CA Lowry, CH Summers
	and KJ Renner 2008 Corticotrophin-releasing factor in the dorsal raphé increases
	medial prefrontal cortical serotonin via type 2 receptors and median raphé 
	activity.  Eur J Neuroscience 28: 299-310

Lukkes JL, GL Forster, KJ Renner and CH Summers 2008 Corticotropin-releasing 
	factor 1 and 2 receptors in the dorsal raphé differentially affect serotonin 
	release in the nucleus accumbens. Eur J Pharmacol 578: 185-193

Ronan PJ and CH Summers 2008 Biology, Animal Models in 
	Encyclopedia of Psychological Trauma, G Reyes, J Elhai, J Ford eds, 
	John Wiley & Sons, New York pp. 80-83
Waters RP, KJ Renner, RB Pringle, CH Summers, SL Britton, LG Koch, JG Swallow 2008 
	Selection for aerobic capacity affects corticosterone, monoamines and  
	wheel-running activity Physiol & Behav 93: 1044-1054
Anderson WD and CH Summers 2007 Neuroendocrine mechanisms, stress coping
	strategies, and social dominance: Comparative lessons about leadership
	potential. Annals Amer Acad Political Social Sci 614: 102-130

Carpenter RE, MJ Watt, GL Forster, Ø Øverli, C Bockholt, KJ Renner and CH Summers
	2007 Corticotropin releasing factor induces anxiogenic locomotion in trout and
	alters serotonergic and dopaminergic activity. Horm & Behav 52: 600-611

Clotfelter ED, EP O'Hare, MM McNitt, RE Carpenter and CH Summers 2007 
	Pharmacological manipulation of the serotonergic system affects aggressive 
	behavior and brain monoamine levels in the fighting fish Betta splendens. 
	Pharmacol, Biochem Behav 87: 222-31
Korzan WJ, E Höglund, MJ Watt, GL Forster, Ø Øverli, JL Lukkes and CH Summers
	2007 Memory of opponents is more potent than visual sign stimuli after
	social hierarchy has been established. Behav Brain Res 183: 31-42

Korzan WJ and CH Summers 2007 Behavioral diversity and neurochemical plasticity:
	Selection of stress coping strategies that define social status.
	Brain Behav Evol 70: 257-266
Øverli Ø, C Sørensen, KGT Pulman, TG Pottinger, WJ Korzan, CH Summers 
	and G Nilsson 2007 Evolutionary background for stress coping styles:
	Relationships between physiological, behavioral, and cognitive
	traits in non-mammalian vertebrates Neurosci Biobehav Rev 31: 

Ronan PJ, MP Gaikowski, SJ Hamilton, KJ Buhl and CH Summers 2007 
	Ammonia causes decreased brain monoamines in fathead minnows 
	(Pimephales promelas). Brain Res 1147: 184-191
Sørensen C, Ø Øverli, CH Summers, G Nilsson 2007 Social regulation
	of neurogenesis in teleosts. Brain Behav Evol 70: 239-246
Watt MJ, GL Forster, WJ Korzan, KJ Renner and CH Summers 2007 Initial
	perception of social threat rapidly alters neuroendocrine activity 
	Physiol Behav 90:  567-575
Forster GL, N Feng, MJ Watt, WJ Korzan,  NJ Mouw, CH Summers and 
	KJ Renner 2006 Corticotropin-releasing factor in the dorsal 
	raphe elicits temporally distinct serotonergic responses in 
	the limbic system Neuroscience 141: 1047-1055

Jones RE, KH Lopez, HB Austin, DJ Orlicky and CH Summers 2006 
	Uterine motility in the reptile Anolis carolinensis: Interactive 
	effects of tension, prostaglandins, calcium and vasotocin. 
	J Exp Zool 305A: 1030-1040

Korzan WJ, GL Forster, MJ Watt, and CH Summers 2006 Dopaminergic
	activity modulation via aggression, status and a visual social
	signal. Behav Neurosci 120: 93-102

Korzan WJ, Ø Øverli and CH Summers 2006 Future social rank: 
	Forecasting status in the green anole (Anolis carolinensis) 
	Acta Ethologica 9: 48-57

Summers CH and S Winberg 2006 Interactions between the neural
	regulation of stress and aggression J Exp Biol 209: 4581-4589

Forster GL, MJ Watt, WJ Korzan, KJ Renner and CH Summers 2005
	Opponent recognition between male green anoles (Anolis
	carolinensis). Anim Behav 69: 733-740
Höglund E, WJ Korzan, MJ Watt, GL Forster, TR Summers, H Falch
	Johannessen, KJ Renner and CH Summers 2005 Effects of L-DOPA
	on aggressive behavior and central monoaminergic activity in
	the lizard Anolis carolinensis, using a new method for drug
	delivery. Behav Brain Res 156: 53-64

Summers, CH, GL Forster, WJ Korzan, MJ Watt, ET Larson, Ø Øverli,
	E Höglund, PJ Ronan, TR Summers, KJ Renner, N Greenberg 2005
	Dynamics and mechanics of social rank reversal
	J Comp Physiol A 191: 241-252

Summers CH, WJ Korzan, JL Lukkes, MJ Watt, GL Forster, Ø Øverli,
	E Höglund, ET Larson, PJ Ronan, JM Matter, TR Summers, KJ Renner,
	and N Greenberg 2005 Does serotonin influence aggression?
	Comparing regional activity before and during social interaction
	Physiol Biochem Zool 78: 679-694

Summers CH, MJ Watt, TL Ling, GL Forster, RE Carpenter, WJ Korzan,
	JL Lukkes, Ø Øverli 2005 Glucocorticoid interaction with 
	aggression in non-mammalian vertebrates: Reciprocal action.
	Eur J Parmacol 526: 21-35

Ten Eyck GR, WJ Jermakowicz, AF Chinn and CH Summers 2005 Ontogeny of
	central serotonergic neurons in the directly developing frog,
	Eleutherodactylus coqui.  Anat & Embryol 210: 221-233
Ten Eyck GR, PJ Ronan, KJ Renner and CH Summers 2005 Serotonin
	metabolism in directly developing frog embryos during paternal
	care. Neurosci Lett 388: 100-105

Waters RP, AJ Emerson, MJ Watt, GL Forster, JG Swallow and CH Summers
	2005 Stress induces rapid changes in central catecholaminergic
	activity in Anolis carolinensis: Restraint and forced physical
	activity. Brain Res Bull 67: 210-218

Jermakowicz WJ, DA Dorsey, AL Brown, K Wojciechowski, CL Giscombe,
	B M Graves, CH Summers and GR Ten Eyck 2004 Development of the
	nasal chemosensory organs in two terrestrial anurans: The directly
	developing frog, Eleutherodactylus coqui (Anura: Leptodactylidae),
	and the metamorphosing toad, Bufo americanus (Anura: Bufonidae).
	J Morph 261: 225-248

Korzan, WJ and CH Summers 2004 Serotonergic response to social stress
	and artificial social sign stimuli during paired interactions
	between male Anolis carolinensis.  Neuroscience 123: 835-845
Larson, ET, S Winberg, I Mayer, O LePage, CH Summers and Ø Øverli 2004
	Social stress affects circulating melatonin levels in rainbow trout.
	Geneneral and Compomparative Endocrinology 136: 322-327

Meyer, WN, J Keifer, WJ Korzan and CH Summers 2004 Social stress and
	corticosterone regionally upregulate limbic N-methyl-D-Aspartate
	Receptor (NR) subunit type NR2A and NR2B in the lizard Anolis
	carolinensis.  Neuroscience 128: 675-684

Øverli Ø, WJ Korzan, E Höglund, S Winberg, H Bollig, MJ Watt, GL Forster,
	BA Barton, E Øverli, KJ Renner and CH Summers 2004 Stress coping style
	predicts aggression and social dominance in rainbow trout.
	Hormones & Behavior 45: 235-241

Øverli Ø, WJ Korzan, ET Larson, O Lepage, TG Pottinger, S Winberg, KJ Renner
	and CH Summers 2004 Behavioral and neuroendocrine correlates of 
	displaced aggression in trout Hormones & Behavior 45: 324-329
Larson ET, DO Norris, EG Grau and CH Summers 2003 Monoamines stimulate
	sex reversal in the saddleback wrasse General and Comparative
	Endocrinology 130: 289-298

Larson ET, DO Norris and CH Summers 2003 Monoaminergic
	changes associated with socially induced sex reversal
	in the saddleback wrasse Neuroscience 119: 251-263

Summers, CH, JL Kampshoff, PJ Ronan, CA Lowry, AA Prestbo, WJ Korzan 
	and KJ Renner 2003 Monoaminergic activity in subregions of raphé
	nuclei elicited by prior stress and the neuropeptide corticotropin-
	releasing factor Journal of Neuroendocrinology 15: 1122-1133

Summers, CH, TR Summers, MC Moore, WJ Korzan, SK Woodley, PJ Ronan, 
	E Höglund, MJ Watt and N Greenberg 2003 Temporal patterns  
	of limbic monoamine and plasma corticosterone response during 
	social stress Neuroscience 116: 553-563
Summers, TR, JM Matter, JM McKay, PJ Ronan, ET Larson, KJ Renner and
	CH Summers 2003 Rapid glucocorticoid stimulation and GABAergic
	inhibition of hippocampal serotonergic response: In vivo dialysis
	in the lizard Anolis carolinensis. Hormones & Behavior 43: 245-253
Carr, JA and CH Summers 2002 Is stress more than a disease? A 
	comparative look at adaptation to stress. Integrative and
	Comparative Biology 42: 505-507

Greenberg, N, JA Carr and CH Summers 2002 Causes and consequences of the
	stress response. Integrative and Comparative Biology 42: 508-516

Hoffman, CS, TM Westin, HM Miner, PL Johnson, CH Summers and KJ Renner 2002
	GABAergic drugs alter hypothalamic serotonin release and lordosis in
	estrogen-primed rats. Brain Research 946: 96-103

Korzan WJ, TR Summers and CH Summers 2002 Manipulation of visual sympathetic
	sign stimulus modifies social status and plasma catecholamines. 
	General and Comparative Endocrinology 128: 153-161

Summers, CH 2002 Social interaction over time, implications for stress
	responsiveness Integrative and Comparative Biology 42: 591-599

Korzan WJ, TR Summers, PJ Ronan, KJ Renner and CH Summers 2001 The role
	of monoaminergic perikarya during aggression and sympathetic social
	signaling Brain Behavior and Evolution 57: 317-327
Larson ET, and CH Summers 2001 Serotonin reverses dominant social
	status Behavioral Brain Research 121: 95-102

Summers, CH 2001 Mechanisms for Quick and Variable Responses
	Brain Behavior & Evolution 57: 283-292.

Emerson, AJ, DP Kappenman, PJ Ronan, KJ Renner and CH Summers 2000
	Stress induces rapid changes in serotonergic activity: Restraint
	and exertion Behav Brain Res 111: 83-92

Korzan WJ, TR Summers, PJ Ronan and CH Summers 2000 Visible sympathetic
	activity as a social signal in Anolis carolinensis: Changes in
	aggression and plasma catecholamines Horm Behav 38: 193-199

Korzan WJ, TR Summers and CH Summers 2000 Monoaminergic activities
	of limbic systems are elevated during aggression: Influence of
	sympathetic social signaling Brain Research 870: 170-178

Summers, CH, ET Larson, PJ Ronan, PM Hofmann, AJ Emerson, and KJ Renner 2000
	Serotonergic responses to corticosterone and testosterone in the limbic
	system General Comp Endocrinol 117: 151-159

Larson ET, DO Norris, EG Grau and CH Summers 1999 Central monoaminergic
	changes accompany sex reversal in the saddleback wrasse In
	Norberg, B, OS Kjesbu, GL Taranger et. al. (eds.) Proc 6th Int Symp
	Repro Physiol Fish, 53-55

Deckel AW, R Lillianey, PJ Ronan and CH Summers 1998 Lateralized effects
	of ethanol on aggression and serotonergic systems. Brain Research
	807: 38-46.

Matter JM, PJ Ronan and CH Summers 1998 Central monoamines in free
	ranging lizards: Differences associated with social roles and
	territoriality Brain Behavior Evolution 51: 23-32.

Summers CH, ET Larson, TR Summers, KJ Renner and N Greenberg 1998
	Regional and temporal separation of serotonergic activity mediating
	social stress Neuroscience 87: 489-496.

Jones RE, KH Lopez, TA Maldonado, TR Summers, CH Summers, CR Propper
	and JD Woodling 1997 Unilateral ovariectomy influences hypothalamic
	monoamine asymmetries in a lizard (Anolis) that exhibits
	alternation of ovulation Gen Comp Endocrinol 108: 306-315.

Norris DO, JA Carr, CH Summers, and R Featherston 1997 Interactions of
	androgens and estradiol on sex accessory ducts of larval tiger
	salamanders, Ambystoma tigrinum General and Comparative
	Endocrinology 106: 348-355.

Summers TR, AL Hunter and CH Summers 1997 Female social reproductive roles
	affect central monoamines Brain Research 767: 272-278.

Andrews TJ and CH Summers 1996 Aggression, and the acquisition and
	social function of dominance in female green anoles, Anolis
	carolinensis. Behaviour 133: 1265-1279.

Gaikowski MP, SJ Hamilton, KJ Buhl, SF McDonald, and CH Summers 1996
	Acute toxicity of three fire retardant and two fire suppressant foam
	formulations to the early life stages of rainbow trout
	(Onchorhynchus mykiss) Env Toxicol Chem 15: 1365-1374.

Gaikowski MP, SJ Hamilton, KJ Buhl, SF McDonald, and CH Summers 1996
	Acute toxicity of fire fighting chemical formulations to four life
	stages of fathead minnow. Ecotoxicol. Env. Safety 34: 252-263.

Summers CH and N Greenberg 1995 Activation of central biogenic amines
	following aggressive interaction in dominant and subordinate male
	lizards, Anolis carolinensis. Brain, Behav Evol 45: 339-349.

Summers CH 1995 Regulation of ovarian recrudescence: Different effects
	of corticotropin in small and large female lizards, Anolis
	carolinensis. J. Exp. Zool. 271: 228 234.

Summers CH, DA Suedkamp, and TL Grant 1995 Regulation of ovarian
	recrudescence: Effects of social interaction on female lizards,
	Anolis carolinensis. J. Exp. Zool. 271: 235-241.

Summers CH and N. Greenberg 1994. Somatic correlates of adrenergic
	activity during aggression in the lizard, Anolis carolinensis.
	Horm. Behav. 28: 29-40.

Graves BM, CH Summers, and K.L. Olmstead 1993. Sensory mediation of
	aggregation among postmetamorphic Bufo cognatus. J. Herpetol. 27: 315-319.

Hanken J, MW Klymkowsky, CH Summers, DW Seufert and N Ingebrigtsen
	1992 Cranial ontogeny in the direct developing frog
	Eleutherodactylus coqui (Anura: Leptodactylidae), analyzed
	using whole mount immunohistochemistry J. Morph. 211: 95-118.

Summers TR, CH Summers, PH Desan, and TK Smock 1991 Activation of
	the serotonergic system in chick spinal cord during hatching
	J Exp Zool 257: 330-335.

Hanken J, CH Summers, and BK Hall 1989 Morphological integration in
	the cranium during anuran metamorphosis Experientia 45: 872-875.

Hanken J and CH Summers 1988 Skull development during anuran
	metamorphosis: III. Role of thyroid hormone in chondrogenesis.
	J Exp Zool 246: 156-170.

Jones RE, HB Austin, KH Lopez, MS Rand, and CH Summers 1988 Gonadotropin
	induced ovulation in a reptile (Anolis carolinensis):
	Histological observations. Gen Comp Endocrinol 72: 312-322.

Summers CH 1988 Chronic low humidity stress in the lizard Anolis
	carolinensis: Ovarian and oviductal recrudescence. J Exp
	Zool 248: 192-198.

Summers CH and MF Norman 1988 Chronic low humidity stress in the lizard
	Anolis carolinensis: Diurnal corticosterone rhythms Journal
	of Experimental Zoolology 247: 271-278.

Jones RE, KH Lopez, CH Summers, and HB Austin 1987 Seasonal changes in the 
	effects of AVT and stretch on Anolis uterine contractions in
	vitro. J. Exp. Zool. 242: 233-239.

Jones RE, KH Lopez, CH Summers, HB Austin, and MS Rand 1987 Development 
	of an avascular region (the stigma) in ovarian follicles of lizards
	(Anolis). J. Morph. 194: 311-322.

Summers CH, HB Austin, and RE Jones 1985 Induction of oviposition in
	cycling Anolis carolinensis requires a b adrenoreceptor
	blocker and a high dosage of AVT General and Comparative Endocrinology
	57: 389-392.
Jones RE and CH Summers 1984 Compensatory follicular hypertrophy during
	the ovarian cycle of the house gecko, Hemidactylus frenatus. Anat.
	Rec. 209: 59-65.

Jones RE, HB Austin, and CH Summers 1984 Spontaneous rhythmic contractions 
	of the ovarian follicular wall of a lizard (Anolis carolinensis)
	General and Comparative Endocrinology 56: 252 257.

Summers CH 1984 Compensatory testicular hypertrophy in the lizard
	Anolis carolinensis. J. Exp. Zool. 231: 101-107.

Summers CH 1984 Reptilian parthenogenesis. Bull. Md. Herp. Soc. 20:

Jones RE, CH Summers, HB Austin, HM Smith, and TT Gleeson 1983 Ovarian, 
	oviductal, and adrenal vascular connections in female lizards (genus
	Anolis). Anat. Rec. 206: 247-255.

Jones RE, CH Summers, and KH Lopez 1983 Adrenergic inhibition of uterine
	contractions and oviposition in the lizard Anolis carolinensis.
	Gen. Comp. Endocrinol. 51: 77-83.

Jones RE, LJ Guillette Jr, CH Summers, RR Tokarz, and D Crews 1983 The 
	relationship among ovarian condition, steroid hormones, and estrous
	behavior in Anolis carolinensis Journal of Experimental Zoolology
	227: 145-154.
Hays R.L., C.H. Summers, and W. Seitz 1981. Estimating Wildlife Habitat
	Variables. USDI Fish and Wildlife Service. FWS/OBS 81 47. 111 pp.

Published Abstracts
Publications from studies on Fish
Publications from studies on Amphibians
Publications from studies on Lizards
Publications from studies on Rodents