Papilio dardanus: Difference between revisions
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==Mimicry== |
==Mimicry== |
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The species shows [[polymorphism (biology)|polymorphism]] in [[insect wing|wing]] appearance, though this is limited to [[female]]s, which are often given as an example of [[Batesian mimicry]] in insects.<!-- Wickler, quote --> This female-limited [[mimicry]] was first described in 1869 by [[Roland Trimen]].<ref>{{cite journal|last=Trimen|first=R.|year=1869|title=On some remarkable mimetic analogies among African butterflies|journal= [[Transactions of the Linnean Society of London]]|volume= 26|pages=497–522|doi=10.1111/j.1096-3642.1869.tb00538.x|issue=3}}</ref> [[Male]]s have a more or less uniform appearance throughout the species' range, but females come in at least 14 varieties or morphs.<ref name = "Nijhout" /> |
The species shows [[polymorphism (biology)|polymorphism]] in [[insect wing|wing]] appearance, though this is limited to [[female]]s, which are often given as an example of [[Batesian mimicry]] in insects.<!-- Wickler, quote --> This female-limited [[mimicry]] was first described in 1869 by [[Roland Trimen]].<ref>{{cite journal|last=Trimen|first=R.|year=1869|title=On some remarkable mimetic analogies among African butterflies|journal= [[Transactions of the Linnean Society of London]]|volume= 26|pages=497–522|doi=10.1111/j.1096-3642.1869.tb00538.x|issue=3}}</ref> [[Male]]s have a more or less uniform appearance throughout the species' range, but females come in at least 14 varieties or morphs.<ref name = "Nijhout" /> |
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Phenotypic variation within the female morphs of ''Papilio dardanus'' has been found to be controlled at one locus named H that contains at least 11 different alleles.<ref name = "Nijhout" /> Morphs are divided into three general groups based on patterning. They are the hippocoon group, the cenea group, and the planemoides group. The hippocoon group holds the largest amount of morphs and the planemoides group contains phenotypes similar to the male Papilio dardanus form.<ref name = "Nijhout"/> Different combinations of the alleles at H lead to the variety of forms seen within the species. Genetic crosses of individuals found a general dominance hierarchy within the alleles.<ref name = "Nijhout"/> Allele combinations also determine not only which morph will be expressed but the actual size of the patterns shown. Dominant alleles generally make color patterns larger while recessive alleles make patterns smaller.<ref name = "Nijhout"/> |
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Recent studies have narrowed down the region of H to approximately 24 genes that is centered around the engrailed (en) gene which codes for specific transcription factors.<ref name = "Timmermans">{{cite journal |last=Timmermans | first=M. J. T. M. | author2= Baxter, S. W. | author3=Clark, R. | author4=Heckel, D. G. | author5=Vogel, H. | author6=Collins, S. | author7=Papanicolaou, A. | author8=Fukova, I. | author9=Joron, M. | author10=Thompson, M. J. | author11=Jiggins, C. D. | author 12=ffrench-Constant, R. H. | author12=Vogler, A. P. |year=2014 |title=Comparative genomics of the mimicry switch in ''Papilio dardanus'' |journal=Proceedings of the Royal Society: Biological Sciences |volume=281 |issue= |pages= |id= |url=http://rspb.royalsocietypublishing.org/content/281/1787/20140465.full |doi=10.1098/rspb.2014.0465}}</ref> The engrailed site has been found to have non-synonymous mutations throughout individuals in the species which would allow the divergence of each morph. <ref name = "Timmermans">{{cite journal |last=Timmermans | first=M. J. T. M. | author2= Baxter, S. W. | author3=Clark, R. | author4=Heckel, D. G. | author5=Vogel, H. | author6=Collins, S. | author7=Papanicolaou, A. | author8=Fukova, I. | author9=Joron, M. | author10=Thompson, M. J. | author11=Jiggins, C. D. | author 12=ffrench-Constant, R. H. | author12=Vogler, A. P. |year=2014 |title=Comparative genomics of the mimicry switch in ''Papilio dardanus'' |journal=Proceedings of the Royal Society: Biological Sciences |volume=281 |issue= |pages= |id= |url=http://rspb.royalsocietypublishing.org/content/281/1787/20140465.full |doi=10.1098/rspb.2014.0465}}</ref> Studies support that the engrailed gene in Papilio dardanus is monophyletic and has only evolved once within the species.<ref>{{cite journal |last=Thompson |first= M. J. |author2= Timmermans, M. J. T. N. |author3= Jiggins, C. D. |author4= Vogler, A. P |year=2014 |title=The evolutionary genetics of highly divergent alleles of the mimicry locus in ''Papilio dardanus'' |journal= BMC Evolutionary Biology |volume=14 |issue= |pages= |id= |url=http://www.biomedcentral.com/1471-2148/14/140 |doi=10.1186/1471-2148-14-140}}</ref> Findings also suggest that the many different mimetic alleles in the Papilio dardanus genome are solely from mutations in the species. In other words, alleles did not enter into the genome from genetic transfer from other species.<ref>{{cite journal |last=Thompson |first= M. J. |author2= Timmermans, M. J. T. N. |author3= Jiggins, C. D. |author4= Vogler, A. P |year=2014 |title=The evolutionary genetics of highly divergent alleles of the mimicry locus in ''Papilio dardanus'' |journal= BMC Evolutionary Biology |volume=14 |issue= |pages= |id= |url=http://www.biomedcentral.com/1471-2148/14/140 |doi=10.1186/1471-2148-14-140}}</ref> |
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There is also a large amount of variation within each morph from organism to organism. The genetic variation seen at H is most likely due to mutation. This suggests that the mimetic forms are more likely to respond to mutational changes because there is such a wide variety of forms.<ref name = "Nijhout"/> These findings also suggest that mimetic forms are less likely to be subject to selection due to the protections against predators which allows the individual variation to accumulate.<ref name = "Nijhout"/> |
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Some female morphs share a very similar pattern of [[animal colouration|colouration]] with various species of distasteful butterfly (e.g. from the [[Danainae]], a subfamily of [[Nymphalidae|nymphalids]]<!-- Wickler gives two genera -->),<ref name="Mallet">{{cite web|first=J. |last=Mallet|year=2001|url=http://www.ucl.ac.uk/taxome/jim/Mim2/dardanus.html|title=Batesian mimicry in Papilio dardanus|accessdate=2009-08-23}}</ref> while others have been found that mimic male appearance (''andromorphs''). The persistence of these various morphs or different types of females may be explained by [[frequency dependent selection]]. Cook ''et al''. suggest that Batesian mimics gain a fitness advantage by avoiding predators, but suffer harassment from males (see [[sexual conflict]]), whereas andromorphs (male mimics) are vulnerable to [[predation]] but are not harassed by male [[mating]] attempts.<ref name = "Cook">{{cite journal |last=Cook |first=S. E. |authorlink= |author2=Vernon, J. G. |author3=Bateson |author4= M., Guilford, T. |year=1994 |title= Mate choice in the polymorphic African swallowtail butterfly, Papilio dardanus: Male-like females may avoid sexual harassment |trans_title= |journal=[[Animal Behaviour (journal)|Animal Behaviour]] |volume=47 |issue=2 |pages=389–397 |id= |url= |quote= |doi=10.1006/anbe.1994.1053 }}</ref> |
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Such female-limited Batesian mimicry is not unique to this species, even in the genus ''[[Papilio]]''. For instance ''[[Papilio memnon]]'' shows a similar case of polymorphism in females.<ref>{{cite web|author=Mallet, James|year=2001|url=http://www.ucl.ac.uk/taxome/jim/Mim2/memnon.html|title=Batesian mimicry in Papilio memnon|accessdate=2009-09-09}}</ref> Similarly, male mimicry has been observed in another insect, a [[damselfly]] (''[[Ischnura ramburii]]'') which also appears to have evolved camouflage to avoid sexual coercion by males.<ref>Lessells, K. (2005). "Sexual Conflict". In ''[[Encyclopedia of Life Sciences]]''.</ref> |
Such female-limited Batesian mimicry is not unique to this species, even in the genus ''[[Papilio]]''. For instance ''[[Papilio memnon]]'' shows a similar case of polymorphism in females.<ref>{{cite web|author=Mallet, James|year=2001|url=http://www.ucl.ac.uk/taxome/jim/Mim2/memnon.html|title=Batesian mimicry in Papilio memnon|accessdate=2009-09-09}}</ref> Similarly, male mimicry has been observed in another insect, a [[damselfly]] (''[[Ischnura ramburii]]'') which also appears to have evolved camouflage to avoid sexual coercion by males.<ref>Lessells, K. (2005). "Sexual Conflict". In ''[[Encyclopedia of Life Sciences]]''.</ref> |
Revision as of 22:33, 3 November 2014
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Species: | P. dardanus
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Papilio dardanus (the African Swallowtail, Mocker Swallowtail or Flying Handkerchief), is a species of butterfly in the family Papilionidae (the Swallowtails). The species is broadly distributed throughout sub-Saharan Africa.[2] The British entomologist E. B. Poulton described it as "the most interesting butterfly in the world".[3]
Classification
Molecular studies have provided evidence that this species' closest relative is Papilio phorcas, with Papilio constantinus being the next closest (see images below).[4] It is a member of the Papilio genus of which Papilio appalachiensis and Papilio xuthus are also members.
Papilio dardanus is the nominal member of the dardanus species-group. The members of the clade are:
- Papilio dardanus Brown, 1776
- Papilio constantinus Ward, 1871
- Papilio delalandei Godart, [1824]
- Papilio phorcas Cramer, [1775]
- Papilio rex Oberthür, 1886
Subspecies
Listed alphabetically.[5]
- P. d. antinorii Oberthür, 1883 (highlands of Ethiopia)
- P. d. byatti Poulton, 1926 (northern highlands of Somalia)
- P. d. cenea Stoll, [1790] (southern Mozambique, eastern Zimbabwe, Botswana, South Africa, Swaziland)
- P. d. dardanus Brown, 1776 (Senegal, Guinea Bissau, Guinea, Sierra Leone, Liberia, Ivory Coast, Ghana, Burkina Faso, Togo, Benin, Nigeria, Cameroon, Equatorial Guinea, Gabon, Congo, Central African Republic, Angola, Democratic Republic of Congo, Uganda, western Kenya, northern Zambia)
- P. d. figinii Storace, 1962 (highlands of Eritrea)
- P. d. flavicornis Carpenter, 1947 (north-western Kenya)
- P. d. humbloti Oberthür, 1888 (Comoro Islands)
- P. d. meriones C. & R. Felder, 1865 (Madagascar)
- P. d. meseres Carpenter, 1948 (Uganda, south-western Kenya, Tanzania: the western, southern and south-eastern shores of Lake Victoria)
- P. d. ochraceana Vane-Wright 1995 (northern Kenya)
- P. d. polytrophus Rothschild & Jordan, 1903 (Kenya: highlands east of the Rift Valley)
- P. d. sulfurea Palisot de Beauvois, 1806 (São Tomé and Príncipe, Bioko)
- P. d. tibullus Kirby, 1880 (eastern Kenya, eastern Tanzania, Malawi, Zambia)
Ecozone
Mimicry
The species shows polymorphism in wing appearance, though this is limited to females, which are often given as an example of Batesian mimicry in insects. This female-limited mimicry was first described in 1869 by Roland Trimen.[6] Males have a more or less uniform appearance throughout the species' range, but females come in at least 14 varieties or morphs.[2]
Phenotypic variation within the female morphs of Papilio dardanus has been found to be controlled at one locus named H that contains at least 11 different alleles.[2] Morphs are divided into three general groups based on patterning. They are the hippocoon group, the cenea group, and the planemoides group. The hippocoon group holds the largest amount of morphs and the planemoides group contains phenotypes similar to the male Papilio dardanus form.[2] Different combinations of the alleles at H lead to the variety of forms seen within the species. Genetic crosses of individuals found a general dominance hierarchy within the alleles.[2] Allele combinations also determine not only which morph will be expressed but the actual size of the patterns shown. Dominant alleles generally make color patterns larger while recessive alleles make patterns smaller.[2]
Recent studies have narrowed down the region of H to approximately 24 genes that is centered around the engrailed (en) gene which codes for specific transcription factors.[7] The engrailed site has been found to have non-synonymous mutations throughout individuals in the species which would allow the divergence of each morph. [7] Studies support that the engrailed gene in Papilio dardanus is monophyletic and has only evolved once within the species.[8] Findings also suggest that the many different mimetic alleles in the Papilio dardanus genome are solely from mutations in the species. In other words, alleles did not enter into the genome from genetic transfer from other species.[9]
There is also a large amount of variation within each morph from organism to organism. The genetic variation seen at H is most likely due to mutation. This suggests that the mimetic forms are more likely to respond to mutational changes because there is such a wide variety of forms.[2] These findings also suggest that mimetic forms are less likely to be subject to selection due to the protections against predators which allows the individual variation to accumulate.[2]
Some female morphs share a very similar pattern of colouration with various species of distasteful butterfly (e.g. from the Danainae, a subfamily of nymphalids),[10] while others have been found that mimic male appearance (andromorphs). The persistence of these various morphs or different types of females may be explained by frequency dependent selection. Cook et al. suggest that Batesian mimics gain a fitness advantage by avoiding predators, but suffer harassment from males (see sexual conflict), whereas andromorphs (male mimics) are vulnerable to predation but are not harassed by male mating attempts.[11]
Such female-limited Batesian mimicry is not unique to this species, even in the genus Papilio. For instance Papilio memnon shows a similar case of polymorphism in females.[12] Similarly, male mimicry has been observed in another insect, a damselfly (Ischnura ramburii) which also appears to have evolved camouflage to avoid sexual coercion by males.[13]
See also
- Dardanus (figure in Greek mythology)
- Disruptive selection
- Phylogenetics of mimicry
- Supergene
- Cyril Clarke, E. B. Ford and Philip Sheppard (some notable researchers)
- Amauris mimetic model
Gallery
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Emerging from chrysalis
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Adult
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In the wild, South Africa
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Papilio dardanus antinorii female
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Papilio dardanus ochracea female
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Papilio dardanus ochracea male
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Ventral view of same male
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Eclosion video
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Papilio phorcas (male), closest relative of P. dardanus
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Papilio constantinus, next closest relative
References
- ^ Peter Brown, 1776 . Nouvelles illustrations de zoologie, contenant cinquante planches enluminées d'oiseaux curieux, et qui non etés jamais descrits, et quelques de quadrupedes, de reptiles et d'insectes, avec de courtes descriptions systematiques. - New illustrations of zoology, containing fifty coloured plates of new, curious, and non-descript birds, with a few quadrupeds, reptiles and insects. Together with a short and scientific description of the same London. (White).
- ^ a b c d e f g h Nijhout, H. F. (2003). "Polymorphic mimicry in Papilio dardanus: mosaic dominance, big effects, and origins" (PDF). Evolution and Development. 5 (6): 579–592. doi:10.1046/j.1525-142X.2003.03063.x. PMID 14984040. Retrieved 2009-08-22.
- ^ Poulton, E. B. (1924). "Papilio dardanus. The most interesting butterfly in the world". Journal of the East African and Ugandan Natural History Society. 20: 4–22.
- ^ Vane-Wright, R. I.; Raheem, D. C.; Cieslak, A.; Vogler, A. P. (1999). "Evolution of the mimetic African swallowtail butterfly Papilio dardanus: molecular data confirm relationships with P. phorcas and P. constantinus". Biological Journal of the Linnean Society. 99: 215–229. doi:10.1111/j.1095-8312.1999.tb01885.x.
- ^ Papilio, funet.fi
- ^ Trimen, R. (1869). "On some remarkable mimetic analogies among African butterflies". Transactions of the Linnean Society of London. 26 (3): 497–522. doi:10.1111/j.1096-3642.1869.tb00538.x.
- ^ a b Timmermans, M. J. T. M.; Baxter, S. W.; Clark, R.; Heckel, D. G.; Vogel, H.; Collins, S.; Papanicolaou, A.; Fukova, I.; Joron, M.; Thompson, M. J.; Jiggins, C. D.; Vogler, A. P. (2014). "Comparative genomics of the mimicry switch in Papilio dardanus". Proceedings of the Royal Society: Biological Sciences. 281. doi:10.1098/rspb.2014.0465.
{{cite journal}}
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ignored (help) - ^ Thompson, M. J.; Timmermans, M. J. T. N.; Jiggins, C. D.; Vogler, A. P (2014). "The evolutionary genetics of highly divergent alleles of the mimicry locus in Papilio dardanus". BMC Evolutionary Biology. 14. doi:10.1186/1471-2148-14-140.
{{cite journal}}
: CS1 maint: unflagged free DOI (link) - ^ Thompson, M. J.; Timmermans, M. J. T. N.; Jiggins, C. D.; Vogler, A. P (2014). "The evolutionary genetics of highly divergent alleles of the mimicry locus in Papilio dardanus". BMC Evolutionary Biology. 14. doi:10.1186/1471-2148-14-140.
{{cite journal}}
: CS1 maint: unflagged free DOI (link) - ^ Mallet, J. (2001). "Batesian mimicry in Papilio dardanus". Retrieved 2009-08-23.
- ^ Cook, S. E.; Vernon, J. G.; Bateson; M., Guilford, T. (1994). "Mate choice in the polymorphic African swallowtail butterfly, Papilio dardanus: Male-like females may avoid sexual harassment". Animal Behaviour. 47 (2): 389–397. doi:10.1006/anbe.1994.1053.
{{cite journal}}
: Cite has empty unknown parameter:|trans_title=
(help)CS1 maint: multiple names: authors list (link) - ^ Mallet, James (2001). "Batesian mimicry in Papilio memnon". Retrieved 2009-09-09.
- ^ Lessells, K. (2005). "Sexual Conflict". In Encyclopedia of Life Sciences.
- Carcasson, R.H 1960 The Swallowtail Butterflies of East Africa (Lepidoptera,Papilionidae). Journal of the East Africa Natural History Society pdf Key to East Africa members of the species group, diagnostic and other notes and figures. (Permission to host granted by The East Africa Natural History Society)
- Collins, N.M., Morris, M.G., IUCN, 1985 Threatened Swallowtail Butterflies of the World: the IUCN Red Data Book (1985) IUCN pdf