4.4 Article

Arginine vasotocin and androgen pathways are associated with mating system variation in North American cichlid fishes

期刊

HORMONES AND BEHAVIOR
卷 64, 期 1, 页码 44-52

出版社

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.yhbeh.2013.04.006

关键词

AVP; AVT; Herichthys; Monogamy; Polygamy; Prolactin; Vasopressin

资金

  1. Academic Careers in Science and Engineering plus NSF-ADVANCE Opportunity grant
  2. National Science Foundation [IOS-0843712]
  3. Alfred P. Sloan Foundation Fellowship
  4. Dwight W. and Blanche Faye Reeder Centennial Fellowship in Systematic and Evolutionary Biology
  5. Institute for Cellular & Molecular Biology Fellowship
  6. Direct For Biological Sciences
  7. Division Of Integrative Organismal Systems [0843712] Funding Source: National Science Foundation

向作者/读者索取更多资源

Neuroendocrine pathways that regulate social behavior are remarkably conserved across divergent taxa. The neuropeptides arginine vasotocin/vasopressin (AVT/AVP) and their receptor Via mediate aggression, space use, and mating behavior in male vertebrates. The hormone prolactin (PRL) also regulates social behavior across species, most notably paternal behavior. Both hormone systems may be involved in the evolution of monogamous mating systems. We compared AVT, AVT receptor V1a2, PRL, and PRL receptor PRLR1 gene expression in the brains as well as circulating androgen concentrations of free-living reproductively active males of two closely related North American cichlid species, the monogamous Herichthys cyanoguttatus and the polygynous Herichthys minckleyi. We found that H. cyanoguttatus males bond with a single female and together they cooperatively defend a small territory in which they reproduce. In H. minckleyi, a small number of large males defend large territories in which they mate with several females. Levels of V1a2 mRNA were higher in the hypothalamus of H. minckleyi, and PRLR1 expression was higher in the hypothalamus and telencephalon of H. minckleyi. 11-ketotestosterone levels were higher in H. minckleyi, while testosterone levels were higher in H. cyanoguttatus. Our results indicate that a highly active AVT/V1a2 circuit(s) in the brain is associated with space use and social dominance and that pair bonding is mediated either by a different, less active AVT/V1a2 circuit or by another neuroendocrine system. (C) 2013 Elsevier Inc. All rights reserved.

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