Hosts elevate either within-clutch consistency or between-clutch distinctiveness of egg phenotypes in defence against brood parasites

Autor: Martin Stevens, John F. R. Colebrook-Robjent, Claire N. Spottiswoode, Rose Thorogood, Tanmay Dixit, Eleanor M. Caves, Lazaro Hamusikili
Přispěvatelé: Caves, Eleanor M. [0000-0003-3497-5925], Dixit, Tanmay [0000-0001-5604-7965], Stevens, Martin [0000-0001-7768-3426], Thorogood, Rose [0000-0001-5010-2177], Spottiswoode, Claire N. [0000-0003-3232-9559], Apollo - University of Cambridge Repository, Helsinki Institute of Life Science HiLIFE, Organismal and Evolutionary Biology Research Programme, Spottiswoode, Claire [0000-0003-3232-9559]
Rok vydání: 2021
Předmět:
0106 biological sciences
EUROPEAN PASSERINES
Arms race
01 natural sciences
Medical and Health Sciences
Nesting Behavior
APPEARANCE
avian brood parasitism
Parasite hosting
Passeriformes
General Environmental Science
0303 health sciences
ARMS-RACE
General Medicine
Host defence
Biological Sciences
Phenotype
egg signatures
INDIVIDUAL RECOGNITION
1181 Ecology
evolutionary biology
coevolution
Optimal distinctiveness theory
COMMON CUCKOO
General Agricultural and Biological Sciences
host defence
Evolution
education
Zoology
egg pattern
Biology
010603 evolutionary biology
egg colour
General Biochemistry
Genetics and Molecular Biology
Host-Parasite Interactions
03 medical and health sciences
Research articles
Animals
Humans
Clutch
Parasites
Coevolution
030304 developmental biology
Ovum
Brood parasite
General Immunology and Microbiology
REED WARBLERS
Agricultural and Veterinary Sciences
CUCULUS-CANORUS
PATTERN
DISCRIMINATION
Zdroj: Proceedings. Biological sciences, vol 288, iss 1953
Proceedings of the Royal Society B: Biological Sciences
Popis: Funder: Balfour Studentship, Department of Zoology, University of Cambridge
Funder: Pomona College and Downing College Exchange Fellowship
Funder: University of Helsinki Institute of Life Science (HiLIFE)
Funder: Helsinki Institute of Life Science
Funder: Royal Society Dorothy Hodgkin Fellowship
In host–parasite arms races, hosts can evolve signatures of identity to enhance the detection of parasite mimics. In theory, signatures are most effective when within-individual variation is low (‘consistency’), and between-individual variation is high (‘distinctiveness’). However, empirical support for positive covariation in signature consistency and distinctiveness across species is mixed. Here, we attempt to resolve this puzzle by partitioning distinctiveness according to how it is achieved: (i) greater variation within each trait, contributing to elevated ‘absolute distinctiveness’ or (ii) combining phenotypic traits in unpredictable combinations (‘combinatorial distinctiveness’). We tested how consistency covaries with each type of distinctiveness by measuring variation in egg colour and pattern in two African bird families (Cisticolidae and Ploceidae) that experience mimetic brood parasitism. Contrary to predictions, parasitized species, but not unparasitized species, exhibited a negative relationship between consistency and combinatorial distinctiveness. Moreover, regardless of parasitism status, consistency was negatively correlated with absolute distinctiveness across species. Together, these results suggest that (i) selection from parasites acts on how traits combine rather than absolute variation in traits, (ii) consistency and distinctiveness are alternative rather than complementary elements of signatures and (iii) mechanistic constraints may explain the negative relationship between consistency and absolute distinctiveness across species.
Databáze: OpenAIRE
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