An indigenous religious ritual selects for resistance to a toxicant in a livebearing fish.
Human-induced environmental change can affect the evolutionary trajectory of populations. In Mexico, indigenous Zoque people annually introduce barbasco, a fish toxicant, into the Cueva del Azufre to harvest fish during a religious ceremony. Here, we investigated tolerance to barbasco in fish from sites exposed and unexposed to the ritual. We found that barbasco tolerance increases with body size and differs between the sexes. Furthermore, fish from sites exposed to the ceremony had a significantly higher tolerance. Consequently, the annual ceremony may not only affect population structure and gene flow among habitat types, but the increased tolerance in exposed fish may indicate adaptation to human cultural practices in a natural population on a very small spatial scale.
Tobler
M
M
Department of Wildlife and Fisheries Sciences, Texas A&M University, College Station, TX 77843, USA. michi.tobler@gmail.com
Culumber
Z W
ZW
Plath
M
M
Winemiller
K O
KO
Rosenthal
G G
GG
D000222:Adaptation, Physiological; D000818:Animals; D049628:Body Size; D002562:Ceremonial Behavior; D004361:Drug Tolerance; D005260:Female; D006801:Humans; D008297:Male; D032126:Paullinia / Q000633:toxicity*; D011036:Poecilia / Q000033:anatomy & histology / Q000502:physiology*; D012067:Religion; D012737:Sex Factors; D018675:Toxicity Tests
Ecology. 2010 May;91(5):1494-505
20503881
Biol Lett. 2010 Feb 23;6(1):98-101
19740890
Proc Natl Acad Sci U S A. 2001 May 8;98(10):5458-65
11344294
Evolution. 2008 Oct;62(10):2643-59
18637957
J Exp Zool. 1999 Dec 15;285(4):326-59
10578109
Biol Lett. 2009 Aug 23;5(4):506-9
19443506
Extremophiles. 2006 Dec;10(6):577-85
16788733
Biochim Biophys Acta. 1994 Aug 30;1187(2):198-202
8075112
BMC Evol Biol. 2010 Aug 23;10:256
20731863
Proc Natl Acad Sci U S A. 2007 Apr 3;104(14):5732-7
17360379
Mol Ecol. 2007 Mar;16(5):967-76
17305854