Tags

Type your tag names separated by a space and hit enter

Cortisol mediates cleaner wrasse switch from cooperation to cheating and tactical deception.
Horm Behav. 2014 Jul; 66(2):346-50.HB

Abstract

Recent empirical research, mostly done on humans, recognizes that individuals' physiological state affects levels of cooperation. An individual's internal state may affect the payoffs of behavioural alternatives, which in turn could influence the decision to either cooperate or to defect. However, little is known about the physiology underlying condition dependent cooperation. Here, we demonstrate that shifts in cortisol levels affect levels of cooperation in wild cleaner wrasse Labroides dimidiatus. These cleaners cooperate by removing ectoparasites from visiting 'client' reef fishes but prefer to eat client mucus, which constitutes cheating. We exogenously administrated one of three different compounds to adults, that is, (a) cortisol, (b) glucocorticoid receptor antagonist mifepristone RU486 or (c) sham (saline), and observed their cleaning behaviour during the following 45min. The effects of cortisol match an earlier observational study that first described the existence of "cheating" cleaners: such cleaners provide small clients with more tactile stimulation with their pectoral and pelvic fins, a behaviour that attracts larger clients that are then bitten to obtain mucus. Blocking glucocorticoid receptors led to more tactile stimulation to large clients. As energy demands and associated cortisol concentration level shifts affect cleaner wrasse behavioural patterns, cortisol potentially offers a general mechanism for condition dependent cooperation in vertebrates.

Authors+Show Affiliations

CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Universidade do Porto, Campus Agrário de Vairão, Vairão 4485-661, Portugal. Electronic address: marta.soares@cibio.up.pt.Unidade de Investigação em Eco-Etologia, ISPA-Instituto Universitário, Lisboa, Portugal.School of Biological Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia.Unidade de Investigação em Eco-Etologia, ISPA-Instituto Universitário, Lisboa, Portugal; Champalimaud Neuroscience Programme, Instituto Gulbenkian de Ciência, Oeiras, Portugal.Université de Neuchâtel, Institut de Biologie, Eco-Ethologie, Rue Emilie-Argand 11, 2000 Neuchâtel, Switzerland.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24952103

Citation

Soares, Marta C., et al. "Cortisol Mediates Cleaner Wrasse Switch From Cooperation to Cheating and Tactical Deception." Hormones and Behavior, vol. 66, no. 2, 2014, pp. 346-50.
Soares MC, Cardoso SC, Grutter AS, et al. Cortisol mediates cleaner wrasse switch from cooperation to cheating and tactical deception. Horm Behav. 2014;66(2):346-50.
Soares, M. C., Cardoso, S. C., Grutter, A. S., Oliveira, R. F., & Bshary, R. (2014). Cortisol mediates cleaner wrasse switch from cooperation to cheating and tactical deception. Hormones and Behavior, 66(2), 346-50. https://doi.org/10.1016/j.yhbeh.2014.06.010
Soares MC, et al. Cortisol Mediates Cleaner Wrasse Switch From Cooperation to Cheating and Tactical Deception. Horm Behav. 2014;66(2):346-50. PubMed PMID: 24952103.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Cortisol mediates cleaner wrasse switch from cooperation to cheating and tactical deception. AU - Soares,Marta C, AU - Cardoso,Sónia C, AU - Grutter,Alexandra S, AU - Oliveira,Rui F, AU - Bshary,Redouan, Y1 - 2014/06/18/ PY - 2014/01/16/received PY - 2014/06/07/revised PY - 2014/06/10/accepted PY - 2014/6/22/entrez PY - 2014/6/22/pubmed PY - 2015/4/22/medline KW - Cleaner fish KW - Cooperative levels KW - Cortisol KW - Glucocorticoids KW - Labroides dimidiatus KW - Tactical deception SP - 346 EP - 50 JF - Hormones and behavior JO - Horm Behav VL - 66 IS - 2 N2 - Recent empirical research, mostly done on humans, recognizes that individuals' physiological state affects levels of cooperation. An individual's internal state may affect the payoffs of behavioural alternatives, which in turn could influence the decision to either cooperate or to defect. However, little is known about the physiology underlying condition dependent cooperation. Here, we demonstrate that shifts in cortisol levels affect levels of cooperation in wild cleaner wrasse Labroides dimidiatus. These cleaners cooperate by removing ectoparasites from visiting 'client' reef fishes but prefer to eat client mucus, which constitutes cheating. We exogenously administrated one of three different compounds to adults, that is, (a) cortisol, (b) glucocorticoid receptor antagonist mifepristone RU486 or (c) sham (saline), and observed their cleaning behaviour during the following 45min. The effects of cortisol match an earlier observational study that first described the existence of "cheating" cleaners: such cleaners provide small clients with more tactile stimulation with their pectoral and pelvic fins, a behaviour that attracts larger clients that are then bitten to obtain mucus. Blocking glucocorticoid receptors led to more tactile stimulation to large clients. As energy demands and associated cortisol concentration level shifts affect cleaner wrasse behavioural patterns, cortisol potentially offers a general mechanism for condition dependent cooperation in vertebrates. SN - 1095-6867 UR - https://www.unboundmedicine.com/medline/citation/24952103/Cortisol_mediates_cleaner_wrasse_switch_from_cooperation_to_cheating_and_tactical_deception_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0018-506X(14)00126-3 DB - PRIME DP - Unbound Medicine ER -