Knowledge (XXG)

Automimicry

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causes the 'tails' to bear the strongest likeness to the antennae of a butterfly; the real antennae being held so as not to attract attention. Close to the base of the supposed antennae an eye-like mark, in the most appropriate position, exists in many species. The effect of the marking and movement is to produce the deceptive appearance of a head
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animals have since been shown to obtain toxic compounds through their diets, making automimicry potentially widespread. Even if toxic compounds are produced by metabolic processes with an animal, there may still be variability in the amount that animals invest in them, so scope for automimicry remains even when dietary
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species. First, toxins may not be costly. There is evidence that in some cases there is no cost, and that toxic compounds may actually be beneficial for purposes other than defence. If so, then automimics may simply be unlucky enough not to have gathered enough toxins from their environment. A second
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Each hind wing in these butterflies is furnished with a 'tail', which in certain species is long, thin, and apparently knobbed at the end. When the butterfly is resting on a flower the wings are closed and the hind wings are kept in constant motion ... This movement, together with their appearance,
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in 1890, a less vulnerable part of an animal's body resembles a more vulnerable part, for example with deceptive eyespots or a false head that deflects attacks away from the real head, providing an immediate selective advantage. The mechanism is found in both vertebrates such as fishes and snakes,
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to automimicry. If predators switch between host plants that provide toxins and plants that do not, depending on the abundance of larvae on each type, then automimicry of toxic larvae by non-toxic larvae may be maintained in a balanced polymorphism. A third hypothesis is that automimics are more
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coloured and patterned. When feeding on innocuous plants, they are harmless and nutritious, but a bird that has sampled a toxic specimen even once is unlikely to risk tasting harmless specimens with the same aposematic coloration. Such acquired toxicity is not limited to insects: many groups of
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butterflies; when perching on a twig or flower, they commonly do so upside down and shift their rear wings repeatedly, causing antenna-like movements of the "tails" on their wings. Studies of rear-wing damage support the hypothesis that this strategy is effective in deflecting attacks from the
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theory: how can automimicry be maintained, and how can it evolve? For the first question, as long as prey of the species are, on average, unprofitable for predators to attack, automimicry can persist. If this condition is not met, then the population of the species rapidly crashes. The second
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likely to die or to be injured by a predator's attack. If predators carefully sample their prey and spit out any that taste bad before doing significant damage ("go-slow" behaviour), then honest signallers would have an advantage over automimics that cheat.
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in favour of features that deflect predators' attacks is straightforward to explain: variants of patterns that more effectively deflect attack are favoured, since animals with ineffective variants are likely to be killed. Naturalists since
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It turns out that many species of insects are toxic or distasteful when they have fed on plants that contain chemicals of particular classes, but not when they have fed on plants that lack those chemicals. For instance, some
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have noted that butterflies with eyespots or other false head markings can be expected to escape with minor wing damage while the predator gets only "a mouthful of hindwing" instead of an insect meal. In Poulton's words:
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Many insects have filamentous "tails" at the ends of their wings and patterns of markings on the wings themselves. These combine to create a "false head". This misdirects predators such as birds and jumping spiders
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for defence affects members of a species, then cheats might always have higher fitness than honest signallers defended by costly toxins. A variety of hypotheses have been put forth to explain signal honesty in
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near their tails, and when mildly alarmed swim slowly backwards, presenting the tail as a head; however, various hypotheses for the function of such eyespots have been proposed. Several species of
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Sourakov, Andrei (2013). "Two heads are better than one: false head allows Calycopis cecrops (Lycaenidae) to escape predation by a Jumping Spider, Phidippus pulcherrimus (Salticidae)".
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Leimar, Olof; Enquist, Magnus; Sillen-Tullberg, Birgitta (1 January 1986). "Evolutionary Stability of Aposematic Coloration and Prey Unprofitability: A Theoretical Analysis".
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eating a moth, tend to avoid, or to taste and spit out, toxic insects, then mimicry of distasteful forms by harmless morphs of the same species should be favoured.
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Meadows, D. W. (11 February 1993). "Morphological variation in eyespots of the foureye butterflyfish (Chaetodon capistratus): Implications for eyespot function".
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Automimicry has sometimes been used in military vehicles and aircraft. Among vehicles, specialised variants such as the British Second World War
365: 103: 452:; Cook, Laurence M.; Croze, Harvey J. (March 1967). "Predator Responses to Artificial Batesian Mimics Released in a Neotropical Environment". 1149: 361:
had no room for an actual gun, but was fitted with a dummy weapon, imitating the armed version of the same tank, to give it some protection.
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bear false eyes (ocelli) on the back of the head, misleading predators into reacting as though they were the subject of an aggressive stare.
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Robbins, Robert K. (November 1981). "The "False Head" Hypothesis: Predation and Wing Pattern Variation of Lycaenid Butterflies".
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is not involved. Whatever the mechanism, palatability may vary with age, sex, or how recently they used their supply of toxin.
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on the underside. This was intended to confuse the enemy about the aircraft's attitude and likely direction of travel.
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The existence of automimicry in the form of non-toxic mimics of toxic members of the same species (analogous to
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are parasitic on more strongly-defended members of their species, mimicking them to provide the negative
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A 1981 experiment confirmed the expected correlation between deceptiveness and survival in butterflies.
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coil up and hide their head, instead displaying their tail as a false head. Some fishes such as the
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question is more difficult, and can also be rephrased as being about the mechanisms that keep
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or spectrum of palatability: some individuals might be defended, and others palatable.
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Guilford, Tim (October 1994). ""Go-slow" Signalling and the Problem of Automimicry".
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Avoiding Attack: the Evolutionary Ecology of Crypsis, Warning Signals, and Mimicry
1084:"The movement of 'false antennae' in butterflies with 'false head' wing patterns" 967: 1495: 1481: 1346: 328: 220: 174: 72: 64:
in which the same species of animal is imitated. There are two different forms.
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Proceedings of the National Academy of Sciences of the United States of America
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required for warning signals to function. The mechanism, analogous to
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Summers, K.; Speed, M. P.; Blount, J. D.; Stuckert, A. M. M. (2015).
648:"Theoretical Investigations of Automimicry, I. Single Trial Learning" 1178: 465: 1009: 767: 389:
Armoured recovery vehicle variant of Churchill tank, with dummy gun
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painted in, as if the plane was the right way up, imitating itself
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was sometimes painted with a camouflage scheme that included both
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had a dummy gun, imitating an armed variant of the same tank.
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Svennungsen, Thomas Owens; Holen, Øistein Haugsten (2007).
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Cordero, Carlos; López-Palafox, Tania G. (August 2015).
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Automimicry has sometimes been put to military use. The
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Proceedings of the Royal Society B: Biological Sciences
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armoured recovery vehicle variant of the Churchill tank
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López-Palafox, Tania; Cordero, Carlos (2017-06-22).
541:"Ecological Chemistry and the Palatability Spectrum" 1464: 1426: 1332: 224:hypothesis for signal honesty is that there may be 71:in 1967, weakly-defended members of a species with 1242: 852:; Pough, F. Harvey; Meck, H. R. (15 August 1970). 118:Mimicry of distasteful members of the same species 1127:. Kegan Paul, Trench, Trübner. pp. 206–209. 210:. If signals were not honest, they would not be 128:Automimicry was first reported by the ecologist 652:Proceedings of the National Academy of Sciences 646:; Pough, F. Harvey; Meck, H. R. (August 1970). 295: 1201:"Northern Pygmy Owl (Glaucidium californicum)" 110:on its underside, imitating itself, while the 44:, deflecting attacks from the vulnerable head. 1310: 515:. Oxford University Press. pp. 176–182. 391:, imitating an armed variant of the same tank 8: 429:Including Swynnerton, 1926, and Blest, 1957. 596:"The evolutionary stability of automimicry" 1317: 1303: 1295: 1228:British and American Tanks of World War II 1113: 1111: 991: 989: 987: 985: 16:Mimicry of part of own body, e.g. the head 1511:Coloration evidence for natural selection 1226:Chamberlain, Peter; Ellis, Chris (1969). 1099: 1058: 1048: 895: 877: 825: 722: 707:"Are aposematic signals honest? A review" 681: 671: 619: 1203:. Owl Research Institute. Archived from 497: 495: 493: 491: 441: 422: 378: 372:and automimicry in the form of a false 1245:Fighter combat: tactics and maneuvring 323:Among vertebrates, snakes such as the 270:). Spectacular examples occur in the 7: 1138:Graham, Sean P. (18 February 2018). 359:Churchill armoured recovery vehicle 1451:Pouyannian (with pseudocopulation) 189:If insect-eating birds, like this 83:, is found in insects such as the 14: 1249:. Naval Institute Press. p.  1577: 1576: 1417: 1352:Aristotelian/Distraction display 396: 381: 245:) such as this gray hairstreak ( 90:In another form, first noted by 67:In one form, first described by 36:) mimic its own eyes, which are 711:Journal of Evolutionary Biology 132:and colleagues, who found that 106:was often painted with a false 1230:. Arco Publishing. p. 70. 921:Journal of Theoretical Biology 316:) showing eyespots behind head 226:frequency-dependent advantages 1: 1543:Frequency-dependent selection 565:10.1126/science.161.3848.1349 968:10.1080/00222933.2012.759288 300:at the wrong end of the body 1624: 1144:. JHU Press. p. 319. 956:Journal of Natural History 366:A-10 Thunderbolt (Warthog) 350: 254: 201:) poses two challenges to 121: 104:A-10 Thunderbolt (Warthog) 1571: 1415: 1472:Anti-predator adaptation 1276:A-10 Warthog Walk Around 1101:10.1093/czoolo/61.4.758 998:The American Naturalist 800:; Speed, M. P. (2006). 756:The American Naturalist 537:Brower, Lincoln Pierson 509:; Speed, M. P. (2004). 450:Brower, Lincoln Pierson 313:Glaucidium californicum 241:Many blue butterflies ( 1124:The Colours of Animals 941:10.1006/jtbi.1994.1192 879:10.1073/pnas.66.4.1059 818:10.1098/rspb.2005.3238 673:10.1073/pnas.66.4.1059 612:10.1098/rspb.2007.0456 317: 304: 289:The Colours of Animals 252: 208:warning signals honest 194: 77:reinforcement learning 45: 1563:Underwater camouflage 1342:Aggressive/Wicklerian 1274:Neubeck, Ken (1999). 1241:Shaw, Robert (1985). 370:disruptive coloration 351:Further information: 333:foureye butterflyfish 309: 255:Further information: 240: 212:evolutionarily stable 188: 122:Further information: 58:intraspecific mimicry 34:Chaetodon capistratus 30:foureye butterflyfish 24: 1538:Evolutionary ecology 1523:Deception in animals 1517:Dazzled and Deceived 1477:Animal communication 962:(15–16): 1047–1054. 214:. If costs of using 166:) which contain the 158:milkweed butterflies 95:and insects such as 1384:Emsleyan/Mertensian 1207:on 28 December 2015 933:1994JThBi.170..311G 870:1970PNAS...66.1059B 664:1970PNAS...66.1059B 606:(1621): 2055–2063. 557:1968Sci...161.1349B 551:(3848): 1349–1351. 405:A-10 Thunderbolt II 353:Aircraft camouflage 261:Disruptive eye mask 160:feed on milkweeds ( 134:monarch butterflies 42:disruptive eye mask 1608:Warning coloration 1528:Deimatic behaviour 1119:Poulton, Edward B. 1050:10.7717/peerj.3493 850:Brower, Lincoln P. 644:Brower, Lincoln P. 364:The ground attack 318: 253: 195: 140:were palatable to 73:warning coloration 46: 1590: 1589: 1558:Signalling theory 1533:Mimicry#Evolution 1506:Community ecology 1501:Animal coloration 1347:Ant/Myrmecomorphy 1151:978-1-4214-2360-9 812:(1584): 373–378. 798:Ruxton, Graeme D. 724:10.1111/jeb.12676 503:Ruxton, Graeme D. 286:in his 1890 book 284:Edward B. Poulton 279:Natural selection 257:Eyespot (mimicry) 168:cardiac glycoside 124:Signalling theory 92:Edward B. Poulton 85:monarch butterfly 54:Browerian mimicry 1615: 1582:Category mimicry 1580: 1579: 1421: 1319: 1312: 1305: 1296: 1290: 1289: 1271: 1265: 1264: 1248: 1238: 1232: 1231: 1223: 1217: 1216: 1214: 1212: 1197: 1191: 1190: 1162: 1156: 1155: 1135: 1129: 1128: 1115: 1106: 1105: 1103: 1079: 1073: 1072: 1062: 1052: 1028: 1022: 1021: 993: 980: 979: 951: 945: 944: 916: 910: 909: 899: 881: 864:(4): 1059–1066. 846: 840: 839: 829: 794: 788: 787: 751: 745: 744: 726: 717:(9): 1583–1599. 702: 696: 695: 685: 675: 658:(4): 1059–1066. 640: 634: 633: 623: 591: 585: 584: 533: 527: 526: 499: 486: 485: 446: 430: 427: 400: 385: 199:Batesian mimicry 81:Batesian mimicry 1623: 1622: 1618: 1617: 1616: 1614: 1613: 1612: 1593: 1592: 1591: 1586: 1567: 1460: 1422: 1413: 1328: 1323: 1293: 1286: 1273: 1272: 1268: 1261: 1240: 1239: 1235: 1225: 1224: 1220: 1210: 1208: 1199: 1198: 1194: 1179:10.2307/1446319 1164: 1163: 1159: 1152: 1141:American Snakes 1137: 1136: 1132: 1117: 1116: 1109: 1088:Current Zoology 1081: 1080: 1076: 1030: 1029: 1025: 995: 994: 983: 953: 952: 948: 918: 917: 913: 848: 847: 843: 796: 795: 791: 753: 752: 748: 704: 703: 699: 642: 641: 637: 600:Proc. R. Soc. B 593: 592: 588: 535: 534: 530: 523: 507:Sherratt, T. N. 501: 500: 489: 466:10.2307/2406736 448: 447: 443: 439: 434: 433: 428: 424: 419: 412: 401: 392: 386: 355: 349: 275:insect's head. 263: 248:Strymon melinus 235: 126: 120: 60:, is a form of 17: 12: 11: 5: 1621: 1619: 1611: 1610: 1605: 1595: 1594: 1588: 1587: 1585: 1584: 1572: 1569: 1568: 1566: 1565: 1560: 1555: 1550: 1545: 1540: 1535: 1530: 1525: 1520: 1513: 1508: 1503: 1498: 1493: 1484: 1479: 1474: 1468: 1466: 1465:Related topics 1462: 1461: 1459: 1458: 1453: 1448: 1443: 1438: 1432: 1430: 1424: 1423: 1416: 1414: 1412: 1411: 1406: 1404:In vertebrates 1401: 1396: 1391: 1386: 1381: 1376: 1371: 1370: 1369: 1359: 1354: 1349: 1344: 1338: 1336: 1330: 1329: 1324: 1322: 1321: 1314: 1307: 1299: 1292: 1291: 1284: 1266: 1259: 1233: 1218: 1192: 1173:(1): 235–240. 1157: 1150: 1130: 1107: 1094:(4): 758–764. 1074: 1023: 1010:10.1086/283868 1004:(5): 770–775. 981: 946: 927:(3): 311–316. 911: 841: 789: 768:10.1086/284581 762:(4): 469–490. 746: 697: 635: 586: 528: 521: 487: 440: 438: 435: 432: 431: 421: 420: 418: 415: 414: 413: 402: 395: 393: 387: 380: 348: 347:Military usage 345: 234: 231: 175:aposematically 130:Lincoln Brower 119: 116: 69:Lincoln Brower 15: 13: 10: 9: 6: 4: 3: 2: 1620: 1609: 1606: 1604: 1601: 1600: 1598: 1583: 1574: 1573: 1570: 1564: 1561: 1559: 1556: 1554: 1551: 1549: 1546: 1544: 1541: 1539: 1536: 1534: 1531: 1529: 1526: 1524: 1521: 1519: 1518: 1514: 1512: 1509: 1507: 1504: 1502: 1499: 1497: 1494: 1492: 1488: 1485: 1483: 1480: 1478: 1475: 1473: 1470: 1469: 1467: 1463: 1457: 1454: 1452: 1449: 1447: 1444: 1442: 1439: 1437: 1434: 1433: 1431: 1429: 1425: 1420: 1410: 1407: 1405: 1402: 1400: 1397: 1395: 1392: 1390: 1387: 1385: 1382: 1380: 1377: 1375: 1372: 1368: 1365: 1364: 1363: 1360: 1358: 1355: 1353: 1350: 1348: 1345: 1343: 1340: 1339: 1337: 1335: 1331: 1327: 1320: 1315: 1313: 1308: 1306: 1301: 1300: 1297: 1287: 1285:0-89747-400-7 1281: 1277: 1270: 1267: 1262: 1260:0-87021-059-9 1256: 1252: 1247: 1246: 1237: 1234: 1229: 1222: 1219: 1206: 1202: 1196: 1193: 1188: 1184: 1180: 1176: 1172: 1168: 1161: 1158: 1153: 1147: 1143: 1142: 1134: 1131: 1126: 1125: 1120: 1114: 1112: 1108: 1102: 1097: 1093: 1089: 1085: 1078: 1075: 1070: 1066: 1061: 1056: 1051: 1046: 1042: 1038: 1034: 1027: 1024: 1019: 1015: 1011: 1007: 1003: 999: 992: 990: 988: 986: 982: 977: 973: 969: 965: 961: 957: 950: 947: 942: 938: 934: 930: 926: 922: 915: 912: 907: 903: 898: 893: 889: 885: 880: 875: 871: 867: 863: 859: 855: 851: 845: 842: 837: 833: 828: 823: 819: 815: 811: 807: 803: 799: 793: 790: 785: 781: 777: 773: 769: 765: 761: 757: 750: 747: 742: 738: 734: 730: 725: 720: 716: 712: 708: 701: 698: 693: 689: 684: 679: 674: 669: 665: 661: 657: 653: 649: 645: 639: 636: 631: 627: 622: 617: 613: 609: 605: 601: 597: 590: 587: 582: 578: 574: 570: 566: 562: 558: 554: 550: 546: 542: 538: 532: 529: 524: 522:9780198528593 518: 514: 513: 508: 504: 498: 496: 494: 492: 488: 483: 479: 475: 471: 467: 463: 459: 455: 451: 445: 442: 436: 426: 423: 416: 410: 406: 403:Underside of 399: 394: 390: 384: 379: 377: 375: 371: 367: 362: 360: 354: 346: 344: 342: 338: 334: 330: 326: 321: 315: 314: 308: 303: 301: 294: 291: 290: 285: 280: 276: 273: 269: 262: 258: 250: 249: 244: 239: 232: 230: 227: 222: 217: 213: 209: 204: 200: 192: 187: 183: 181: 176: 172: 169: 165: 164: 159: 153: 151: 147: 143: 139: 135: 131: 125: 117: 115: 113: 109: 105: 100: 99:butterflies. 98: 93: 88: 86: 82: 78: 74: 70: 65: 63: 59: 55: 51: 43: 39: 35: 31: 27: 23: 19: 1553:Polymorphism 1548:Phagomimicry 1515: 1496:Co-evolution 1356: 1275: 1269: 1244: 1236: 1227: 1221: 1209:. 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Index


Eyespots
foureye butterflyfish
camouflaged
disruptive eye mask
mimicry
Lincoln Brower
warning coloration
reinforcement learning
Batesian mimicry
monarch butterfly
Edward B. Poulton
hairstreak
A-10 Thunderbolt (Warthog)
canopy
armoured recovery vehicle variant of the Churchill tank
Signalling theory
Lincoln Brower
monarch butterflies
cabbage
blue jays
milkweed
polymorphism
milkweed butterflies
Asclepias
cardiac glycoside
oleandrin
aposematically
plasticity

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