+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Multiple receivers, multiple ornaments, and a trade-off between agonistic and epigamic signaling in a widowbird

, : Multiple receivers, multiple ornaments, and a trade-off between agonistic and epigamic signaling in a widowbird. American Naturalist 160(5): 683-691

Sexual displays often involve several different ornamental traits. Yet most indicator models of sexual selection based on a single receiver (usually a choosy female) find that multiple handicap signals should be unstable. Here we study reasons for this contradiction, analyzing signal function, signal content, and trade-offs between signals in the polygynous red-collared widowbird Euplectes ardens. Males have both a long, graduated tail and a red carotenoid collar badge. Territory-holding "residents" have slightly shorter tails than the nonbreeding "floaters," but their carotenoid collars are 40% larger, and they have (on the basis of reflectance spectrometry and objective colorimetry) a 23-nm more long-wave ("redder") hue than floaters. This corroborates experimental evidence that the red collar is selected by male contest competition, whereas female choice is based almost exclusively on male tail length. Tail length is negatively correlated with the carotenoid signal, which together with body size and condition explains 55% of the variation in tail length. The trade-off in tail length and carotenoid investment is steeper among residents, suggesting an interaction with costs of territory defense. We propose that the "multiple receiver hypothesis" can explain the coexistence of multiple handicap signals. Furthermore, the trade-off between signal expressions might contribute to the inverse relation between nuptial tail elongation and coloration in the genus Euplectes (bishops and widowbirds).


PMID: 18707516

DOI: 10.1086/342817

Other references

Kittle, P.D., 1977: The biology of water striders hemiptera heteroptera gerridae in northwest arkansas usa. Thirteen species of Gerridae were recorded in Washington County, Arkansas [USA], from March 1972-March 1973. Five species of Gerris [G. argenticollis Parshley, G. canaliculatus Say, G. marginatus Say, G. nebularis Drake et Hottes, G. remigis Say],...

Abong, J.M.; Andutan, M.M.C., 1999: Antituberculous drug desensitization. Journal of Allergy & Clinical Immunology 103(1 PART 2): S34, Jan

Boei, J.J.W.A.; Vermeulen, S.; Skubakova, M.M.; Meijers, M.; Loenen, W.A.M.; Wolterbeek, R.; Mullenders, L.H.F.; Vrieling, H.; Giphart-Gassler, M., 2012: No threshold for the induction of chromosomal damage at clinically relevant low doses of X rays. The recent steep increase in population dose from radiation-based medical diagnostics, such as computed tomography (CT) scans, requires insight into human health risks, especially in terms of cancer development. Since the induction of genetic dama...

Benoit, L.; Boichot, C.; Cheynel, N.; Arnould, L.; Chauffert, B.; Cuisenier, J.; Fraisse, J., 2005: Preventing lymphedema and morbidity with an omentum flap after ilioinguinal lymph node dissection. Pedicled omentoplasty has been advocated to prevent the formation of lymphocysts and lymphedema after pelvic lymph node dissection, We evaluated the possible benefit of a pediculated omentoplasty placed in the groin for preventing complications af...

Bellmunt, J.; de Wit, R.; Vaughn, D.J.; Fradet, Y.; Lee, J-Lyun.; Fong, L.; Vogelzang, N.J.; Climent, M.A.; Petrylak, D.P.; Choueiri, T.K.; Necchi, A.; Gerritsen, W.; Gurney, H.; Quinn, D.I.; Culine, Séphane.; Sternberg, C.N.; Mai, Y.; Poehlein, C.H.; Perini, R.F.; Bajorin, D.F.; McCaffrey, E.; Hill, A.; Shariat, S.; Loidl, W.; Pichler, R.; Samonigg, H.; Sautois, B.; Machiels, J-Pascal.; Macfarlane, R.; Sanchez, C.; Matamala, L.; Kempel, M.; Agerbaek, M.; Sengelov, L.; Pappot, H.; Zanetta, S.;, 2017: Pembrolizumab as Second-Line Therapy for Advanced Urothelial Carcinoma. Label="BACKGROUND">Patients with advanced urothelial carcinoma that progresses after platinum-based chemotherapy have a poor prognosis and limited treatment options.Label="METHODS">In this open-label, international, phase...

McManus, M.A.; Berman, S.; McInerny, T.; Tang, S-Fong., 2006: Weighing the risks of consumer-driven health plans for families. Pediatrics 117(4): 1420-1424

Janz, G.J.; Keenan, A.G., 1947: The preparation of 2-cyanopyridines from cyanogen and some simple 1,3-dienes. Canadian Journal of Research 25(3): 283-288

Hsia, L.C., 1984: Pig house in Taiwan, R.O.C. - present and future. Aspects of pig housing which affect pig production in Taiwan are discussed. They include systematic arrangement of the pig house to minimize health risks etc., orientation of the house for max. thermal comfort and housing systems for boars, dry so...

Hadam M.R.; Dopfer R.; Dammer G., 1989: Pleiotropic effects in cell lines from patients with mhc class ii deficiency. Tissue Antigens 33(2): 154

Yu, M.D.; Yu, Q.F., 1989: Relation between the sulfur and fluoride contents in the leaf of Acacia auriculiformis and atmospheric pollution. Leaves of Acacia auriculiformis were sampled at 19 locations in two contiguous areas adjacent to sulfuric acid and phosphate fertilizer manufacturers on the outskirts of Zhaoqing, Guangdong, in 1983-84. A positive correlation was found between the...