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Text of the page (random words):
ange accumulation in both populations explains a constant adaptation to have lower fitness costs and avoid extinction in accordance with the red queen s hypothesis suggested by leigh van valen in 1973 6 examples edit the phytophthora infestans bintje potato interaction edit bintje potatoes the bintje potato is derived from a cross between munstersen and fransen potato varieties it was created in the netherlands in the early 20th century and now is mainly cultivated in the north of france and belgium the oomycete phytophthora infestans is responsible for the potato blight in particular during the european famine in 1840 zoospores mobile spores characteristics of oomycetes are liberated by zoosporangia provided from a mycelium and brought by rain or wind before infecting tubers and leaves black colours appear on the plant because of the infection of its cellular system necessary for the multiplication of the oomycete infectious population the parasite contains virulent avirulent allelic combinations in several microsatellite loci likewise the host contains several multiloci resistance genes or r gene that interaction is called gene for gene relationship and is in general widespread in plant diseases expression of genetic patterns in the two species is a combination of resistance and virulence characteristics in order to have the best survival rate 7 bats and moths edit spectrogram of pipistrellus pipistrellus bat vocalizations during prey approach the recording covers a total of 1 1 seconds lower main frequency ca 45 khz as typical for a common pipistrelle about 150 milliseconds before final contact time between and duration of calls are becoming much shorter feeding buzz corresponding audio file bats have evolved to use echolocation to detect and catch their prey moths have in turn evolved to detect the echolocation calls of hunting bats and evoke evasive flight maneuvers 8 9 or reply with their own ultrasonic clicks to confuse the bat s echolocation 10 the arctiinae subfamily of erebid moths uniquely respond to bat echolocation in three prevailing hypotheses startle sonar jamming and acoustic aposematic defense 11 all these differences depend on specific environmental settings and the type of echolocation call however these hypotheses are not mutually exclusive and can be used by the same moth for defense 11 the different defense mechanisms have been shown to be directly responsive to bat echolocation through sympatry studies in places with spatial or temporal isolation between bats and their prey the moth species hearing mechanism tends to regress fullard et al 2004 compared adventive and endemic noctiid moth species in a bat free habitat to ultrasound and found that all of the adventive species reacted to the ultrasound by slowing their flight times while only one of the endemic species reacted to the ultrasound signal indicating a loss of hearing over time in the endemic population 8 however the degree of loss or regression depends on the amount of evolutionary time and whether or not the moth species has developed secondary uses for hearing 12 some bats are known to use clicks at frequencies above or below moths hearing ranges 10 this is known as the allotonic frequency hypothesis it argues that the auditory systems in moths have driven their bat predators to use higher or lower frequency echolocation to circumvent the moth hearing 13 barbastelle bats have evolved to use a quieter mode of echolocation calling at a reduced volume and further reducing the volume of their clicks as they close in on prey moths 10 the lower volume of clicks reduces the effective successful hunting range but results in a significantly higher number of moths caught than other louder bat species 10 14 moths have further evolved the ability to discriminate between high and low echolocation click rates which indicates whether the bat has just detected their presence or is actively pursuing them 10 this allows them to decide whether or not defensive ultrasonic clicks are worth the time and energy expenditure 15 the rough skinned newt and the common garter snake edit rough skinned newt rough skinned newts have skin glands that contain a powerful nerve poison tetrodotoxin as an anti predator adaptation throughout much of the newt s range the common garter snake is resistant to the toxin while in principle the toxin binds to a tube shaped protein that acts as a sodium channel in the snake s nerve cells a mutation in several snake populations configures the protein in such a way as to hamper or prevent binding of the toxin conferring resistance in turn resistance creates a selective pressure that favors newts that produce more toxin that in its turn imposes a selective pressure favoring snakes with mutations conferring even greater resistance this evolutionary arms race has resulted in the newts producing levels of toxin far in excess of that needed to kill any other predator 16 17 18 in populations where garter snakes and newts live together higher levels of tetrodotoxin and resistance to it are observed in the two species respectively where the species are separated the toxin levels and resistance are lower 19 while isolated garter snakes have lower resistance they still demonstrate an ability to resist low levels of the toxin suggesting an ancestral predisposition to tetrodotoxin resistance 20 21 the lower levels of resistance in separated populations suggest a fitness cost of both toxin production and resistance snakes with high levels of tetrodotoxin resistance crawl more slowly than isolated populations of snakes making them more vulnerable to predation 19 the same pattern is seen in isolated populations of newts which have less toxin in their skin 22 there are geographic hotspots where levels of tetrodotoxin and resistance are extremely high showing a close interaction between newts and snakes 19 predator whelk and the hard shelled bivalve prey edit predator whelk used their own shell to open the shell of their prey oftentimes breaking both shells in the process this led to better fitness for larger shelled prey however the whelk s population then selected for individuals who were more efficient at opening larger shelled prey 23 this example is an excellent example of an asymmetrical arms race because while the prey is evolving a physical trait larger shells the predators are adapting through the whelks ability to open those larger shells floodplain death adders and separate species of frogs edit floodplain death adders eat three types of frogs one nontoxic one producing mucus when taken by the predator and the highly toxic frogs however the snakes have also found that if they wait to consume their toxic prey the potency decreases in this specific case the asymmetry enabled the snakes to overcome the chemical defenses of the toxic frogs after their death 24 the results of the study showed that the snake became accustomed to the differences in the frogs by their hold and release timing always holding the nontoxic while always releasing the highly toxic frogs with the frogs that discharge mucus somewhere in between the snakes spent more time gaped between the release of the highly toxic frogs than the short gaped time between the release of the frogs that discharge mucus therefore the snakes have a much higher advantage of being able to cope with the different frogs defensive mechanisms while the frogs could eventually increase the potency of their toxic knowing the snakes would adapt to that change as well such as the snakes having venom themselves for the initial attack 24 the coevolution is still highly asymmetrical because of the advantage the predators have over their prey 24 introduced species edit cane toads rhinella marina have experienced a massive population explosion in australia due to the lack of competition when a species has not been subject to an arms race previously it may be at a severe disadvantage and face extinction well before it could ever hope to adapt to a new predator competitor or parasite one species may have been in evolutionary struggles for millions of years by say predators while another might never have faced such pressures for example an island species this is a common problem in isolated ecosystems such as australia or the hawaiian islands in australia many invasive species such as cane toads and rabbits have spread rapidly due to a lack of competition and predatory pressure for example australian predators lack adaptations to cane toad bufotenine allowing the invasive species to spread however there is evidence of some predator species beginning to adapt in various ways to dealing with the cane toad s defence mechanisms see also edit anti predator adaptation parasite host interactions parent offspring conflict antimicrobial resistance evolutionary anachronism references edit dawkins r 1996 the blind watchmaker new york w w norton note this book was also published by penguin in 1991 while the text is identical page numbers differ hoffman antoni 1988 vermeij g j 1987 evolution and escalation an ecological history of life princeton university press princeton n j 527 pp 47 50 journal of evolutionary biology 1 4 369 370 doi 10 1046 j 1420 9101 1988 1040369 x issn 1420 9101 dawkins richard krebs john richard january 1997 arms races between and within species proceedings of the royal society of london series b biological sciences 205 1161 489 511 doi 10 1098 rspb 1979 0081 thierry lodé la guerre des sexes chez les animaux eds odile jacob paris isbn 2 7381 1901 8 da cruz joão filipe gaspar helena calado gonçalo 29 november 2011 turning the game around toxicity in a nudibranch sponge predator prey association chemoecology 22 1 47 53 doi 10 1007 s00049 011 0097 z s2cid 17819241 van valen leigh 1973 a new evolutionary law evolutionary theory 1 1 30 flier w g turkensteen l j van den bosch g b m vereijken p f g mulder a 2001 differential interaction of phytophthora infestans on tubers of potato cultivars with different levels of blight resistance plant pathology 50 3 292 301 bibcode 2001ppath 50 292f doi 10 1046 j 1365 3059 2001 00574 x issn 0032 0862 1 2 fullard j h ratcliffe j m soutar a r 2004 extinction of the acoustic startle response in moths endemic to a bat free habitat journal of evolutionary biology 17 4 856 861 doi 10 1111 j 1420 9101 2004 00722 x pmid 15271085 s2cid 1054325 miller lee a surlykke annemarie july 2001 how some insects detect and avoid being eaten by bats tactics and countertactics of prey and predator pdf bioscience 51 7 570 581 doi 10 1641 0006 3568 2001 051 0570 hsidaa 2 0 co 2 evolutionarily speaking insects have responded to selective pressure from bats with new evasive mechanisms 1 2 3 4 5 palmer jason 19 august 2010 bat and moth arms race revealed bbc news 1 2 yager d d 2012 predator detection and evasion by flying insects current opinion in neurobiology 22 2 201 207 doi 10 1016 j conb 2011 12 011 pmid 22226428 s2cid 24365000 muma k e fullard j h 2004 persistence and regression of hearing in the exclusively diurnal moths trichodezia albovittata geometridae and lycomorpha pholus arctiidae ecological entomology 29 6 718 726 bibcode 2004ecoen 29 718m doi 10 1111 j 0307 6946 2004 00655 x s2cid 83732973 waters d a 2003 bats and moths what is there left to learn physiological entomology 28 4 237 250 doi 10 1111 j 1365 3032 2003 00355 x s2cid 86269745 goerlitz holger r ter hofstede hannah m zeale matt r k jones gareth holderied marc w 2010 an aerial hawking bat uses stealth echolocation to counter moth hearing current biology 20 17 1568 1572 bibcode 2010cbio 20 1568g doi 10 1016 j cub 2010 07 046 pmid 20727755 ratcliffe john m fullard james h arthur benjamin j hoy ronald r 2010 adaptive auditory risk assessment in the dogbane tiger moth when pursued by bats proceedings of the royal society b biological sciences 278 1704 364 370 doi 10 1098 rspb 2010 1488 pmc 3013417 pmid 20719772 feldman c r brodie e d brodie e d pfrender m e 2009 the evolutionary origins of beneficial alleles during the repeated adaptation of garter snakes to deadly pre pnas 106 32 13415 13420 bibcode 2009pnas 10613415f doi 10 1073 pnas 0901224106 pmc 2726340 pmid 19666534 hanifin charles t 2010 the chemical and evolutionary ecology of tetrodotoxin ttx toxicity in terrestrial vertebrates marine drugs 8 3 577 593 doi 10 3390 md8030577 pmc 2857372 pmid 20411116 feldman c r brodie e d brodie e d pfrender m e 2010 genetic architecture of a feeding adaptation garter snake thamnophis resistance to tetrodotoxin bearing prey proceedings of the royal society b biological sciences 277 1698 3317 3325 doi 10 1098 rspb 2010 0748 pmc 2981930 pmid 20522513 1 2 3 brodie e brodie e d ridenhour b 2003 the evolutionary response of predators to dangerous prey hotspots and coldspots in the geographic mosaic of coevolution between garter snakes and newts evolution 56 10 2067 82 doi 10 1554 0014 3820 2002 056 2067 teropt 2 0 co 2 pmid 12449493 s2cid 8251443 brodie edmund d brodie edmund d jr motychak jeffrey e 2002 recovery of garter snakes thamnophis sirtalis from the effects of tetrodotoxin hpet journal of herpetology 36 1 95 98 doi 10 2307 1565808 jstor 1565808 brodie edmund d feldman chris r hanifin charles t motychak jeffrey e mulcahy daniel g williams becky l brodie edmund d jr 2005 parallel arms races between garter snakes and newts involving tetrodotoxin as the phenotypic interface of coevolution journal of chemical ecology 31 2 343 356 bibcode 2005jceco 31 343b doi 10 1007 s10886 005 1345 x pmid 15856788 s2cid 16542226 brodie edmund d brodie edmund d jr 1991 evolutionary response of predators to dangerous prey reduction of toxicity of newts and resistance of garter snakes in island populations evolution 45 1 221 224 doi 10 2307 2409496 jstor 2409496 pmid 28564068 dietl gregory p 3 november 2003 coevolution of a marine gastropod predator and its dangerous bivalve prey biological journal of the linnean society 80 3 409 436 doi 10 1046 j 1095 8312 2003 00255 x 1 2 3 phillips ben shine richard december 2007 when dinner is dangerous toxic frogs elicit species specific responses from a generalist snake predator the american naturalist 170 6 936 942 bibcode 2007anat 170 936p doi 10 1086 522845 pmid 18171175 s2cid 9744969 general dawkins richard krebs john r 1979 arms races between and within species proceedings of the royal society of london b 205 489 511 conner w e corcoran a j 2012 sound strategies the 65 million year old battle between bats and insects annual review of entomology 57 21 39 doi 10 1146 annurev ento 121510 133537 pmid 21888517 external links edit nature s eternal arms race pbs documentary retrieved from https en wikipedia org w index php title evolutionary_arms_race oldid 1379549514 categories evolutionary biology mating wars by type hidden categories articles with short description short description is different from wikidata this page was last edited on 10 october 2026 at 17 14 utc page was 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