No evidence of host-specific egg mimicry in Asian koels.

Avian brood parasitism is costly for the host, in many cases leading to the evolution of defenses like discrimination of parasitic eggs. The parasite, in turn, may evolve mimetic eggs as a counter-adaptation to host egg rejection. Some generalist parasites have evolved host-specific races (gentes) t...

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Autores principales:	Mominul Islam Nahid, Frode Fossøy, Bård G Stokke, Virginia Abernathy, Sajeda Begum, Naomi E Langmore, Eivin Røskaft, Peter S Ranke
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/de0eaaf30d324cf791831e7a6446f960
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spelling	oai:doaj.org-article:de0eaaf30d324cf791831e7a6446f9602021-12-02T20:09:24ZNo evidence of host-specific egg mimicry in Asian koels.1932-620310.1371/journal.pone.0253985https://doaj.org/article/de0eaaf30d324cf791831e7a6446f9602021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0253985https://doaj.org/toc/1932-6203Avian brood parasitism is costly for the host, in many cases leading to the evolution of defenses like discrimination of parasitic eggs. The parasite, in turn, may evolve mimetic eggs as a counter-adaptation to host egg rejection. Some generalist parasites have evolved host-specific races (gentes) that may mimic the eggs of their main hosts, while others have evolved 'jack-of-all-trades' egg phenotypes that mimic key features of the eggs of several different host species. The Asian koel (Eudynamys scolopaceus) is a widely distributed generalist brood parasite that exploits a wide range of host species. Based on human vision, previous studies have described Asian koel eggs as resembling those of its main host, the house crow (Corvus splendens). Using measurements of egg length and breadth, digital image analysis, reflectance spectrophotometry and avian visual modelling, we examined Asian koel egg variation and potential mimicry in egg size and shape, and eggshell pattern and color in three sympatrically occurring host species in Bangladesh: the common myna (Acridotheres tristis), house crow, and long-tailed shrike (Lanius schach). We found some differences among Asian koel eggs laid in different host nests: a) Asian koel eggs in long-tailed shrike nests were larger than those laid in common myna and house crow nests, and b) Asian koel eggs in house crow nests were less elongated than those in common myna nests. However, these changes in Asian koel egg volume and shape were in the opposite direction with respect to their corresponding host egg characteristics. Thus, our study found no evidence for Asian koel host-specific egg mimicry in three sympatrically occurring host species.Mominul Islam NahidFrode FossøyBård G StokkeVirginia AbernathySajeda BegumNaomi E LangmoreEivin RøskaftPeter S RankePublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 7, p e0253985 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Mominul Islam Nahid Frode Fossøy Bård G Stokke Virginia Abernathy Sajeda Begum Naomi E Langmore Eivin Røskaft Peter S Ranke No evidence of host-specific egg mimicry in Asian koels.
description	Avian brood parasitism is costly for the host, in many cases leading to the evolution of defenses like discrimination of parasitic eggs. The parasite, in turn, may evolve mimetic eggs as a counter-adaptation to host egg rejection. Some generalist parasites have evolved host-specific races (gentes) that may mimic the eggs of their main hosts, while others have evolved 'jack-of-all-trades' egg phenotypes that mimic key features of the eggs of several different host species. The Asian koel (Eudynamys scolopaceus) is a widely distributed generalist brood parasite that exploits a wide range of host species. Based on human vision, previous studies have described Asian koel eggs as resembling those of its main host, the house crow (Corvus splendens). Using measurements of egg length and breadth, digital image analysis, reflectance spectrophotometry and avian visual modelling, we examined Asian koel egg variation and potential mimicry in egg size and shape, and eggshell pattern and color in three sympatrically occurring host species in Bangladesh: the common myna (Acridotheres tristis), house crow, and long-tailed shrike (Lanius schach). We found some differences among Asian koel eggs laid in different host nests: a) Asian koel eggs in long-tailed shrike nests were larger than those laid in common myna and house crow nests, and b) Asian koel eggs in house crow nests were less elongated than those in common myna nests. However, these changes in Asian koel egg volume and shape were in the opposite direction with respect to their corresponding host egg characteristics. Thus, our study found no evidence for Asian koel host-specific egg mimicry in three sympatrically occurring host species.
format	article
author	Mominul Islam Nahid Frode Fossøy Bård G Stokke Virginia Abernathy Sajeda Begum Naomi E Langmore Eivin Røskaft Peter S Ranke
author_facet	Mominul Islam Nahid Frode Fossøy Bård G Stokke Virginia Abernathy Sajeda Begum Naomi E Langmore Eivin Røskaft Peter S Ranke
author_sort	Mominul Islam Nahid
title	No evidence of host-specific egg mimicry in Asian koels.
title_short	No evidence of host-specific egg mimicry in Asian koels.
title_full	No evidence of host-specific egg mimicry in Asian koels.
title_fullStr	No evidence of host-specific egg mimicry in Asian koels.
title_full_unstemmed	No evidence of host-specific egg mimicry in Asian koels.
title_sort	no evidence of host-specific egg mimicry in asian koels.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/de0eaaf30d324cf791831e7a6446f960
work_keys_str_mv	AT mominulislamnahid noevidenceofhostspecificeggmimicryinasiankoels AT frodefossøy noevidenceofhostspecificeggmimicryinasiankoels AT bardgstokke noevidenceofhostspecificeggmimicryinasiankoels AT virginiaabernathy noevidenceofhostspecificeggmimicryinasiankoels AT sajedabegum noevidenceofhostspecificeggmimicryinasiankoels AT naomielangmore noevidenceofhostspecificeggmimicryinasiankoels AT eivinrøskaft noevidenceofhostspecificeggmimicryinasiankoels AT petersranke noevidenceofhostspecificeggmimicryinasiankoels
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No evidence of host-specific egg mimicry in Asian koels.

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