Experimental Evidence for Interspecific Female Mimicry in Sympatric Ficedula Flycatchers

Sætre, Glenn‐Peter; Král, Miroslav; Bičík, Vítězslav

doi:10.2307/2410197

Cited by 33 publications

(49 citation statements)

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“…The third interesting feature of the hybrid zones of these birds is the apparent sympatric character displacement of male secondary sexual characteristics, notably plumage colour (Rùskaft & Ja Èrvi, 1992;Sñtre, Kra Âl & Bic ÏõÂ k, 1993;Sñtre et al, 1997a). Experimental evidence shows that this colour divergence facilitates species recognition (Sñtre, Moum et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

Dynamics of a clinal hybrid zone and a comparison with island hybrid zones of flycatchers (Ficedula hypoleuca and F. albicollis)

Sætre¹,

Král²,

Bureš³

et al. 1999

Journal of Zoology

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Breeding data for pied¯ycatchers Ficedula hypoleuca and collared¯ycatchers F. albicollis, from 47 localities in the Czech Republic and Slovakia, were analysed. We show that co-existence and hybridization were mainly restricted to a rather narrow, latitudinal cline. The distribution of the two¯ycatchers coincides with topography and habitat, collared¯ycatchers dominating in warmer habitats than pied¯ycatchers. Maintained co-existence within the same locality was the exception rather than the rule and most matings occurred in allopatry. In sympatry hybridization occurred at a frequency that was much lower than expected from random mating. Hybrids had low hatching success but some hybrids were apparently fertile. Shortage of conspeci®c mates may explain why individual birds engage in mixed species pairs. The proportion of pied¯ycatchers that was involved in mixed pairs was high and increased with decreasing relative frequencies of pied¯ycatchers in the population. The proportion of collared¯ycatchers involved in mixed pairs was low, re¯ecting the higher relative frequency of this species in most mixed populations. Comparisons suggest that fewer hybrids are breeding in the Central European, clinal hybrid zone than in the isolated hybrid zones of the Baltic Isles. Moreover, hybrid fertility was apparently higher in the island zones than in the clinal zone. We suggest that more extensive introgression in the isolated island populations has resulted in an increase in hybrid ®tness by an accumulation of fertile individuals of mixed ancestry (i.e. F2, F3 . . . Fn-hybrids) acting as bridges for gene exchange. Differences in the dynamics of the two classes of hybrid zones, especially in pattern of gene¯ow, may explain these differences in frequency and fertility of hybrids.

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Section: Introductionmentioning

confidence: 99%

Dynamics of a clinal hybrid zone and a comparison with island hybrid zones of flycatchers (Ficedula hypoleuca and F. albicollis)

Sætre¹,

Král²,

Bureš³

et al. 1999

Journal of Zoology

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“…For example, the evolution of color patterns or displays in subordinate species may reduce aggression from dominant species, and thus be favored by natural selection (Gill, 1971; Sætre, Král & Bičík, 1993). The evolution of mimicry of dominant species by subordinates may also be an underappreciated outcome of asymmetric interactions among species.…”

Section: Discussionmentioning

confidence: 99%

The outcomes of most aggressive interactions among closely related bird species are asymmetric

Martin

Freshwater

Ghalambor

2017

PeerJ

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Aggressive interactions among closely related species are common, and can play an important role as a selective pressure shaping species traits and assemblages. The nature of this selective pressure depends on whether the outcomes of aggressive contests are asymmetric between species (i.e., one species is consistently dominant), yet few studies have estimated the prevalence of asymmetric versus symmetric outcomes to aggressive contests. Here we use previously published data involving 26,212 interactions between 270 species pairs of birds from 26 taxonomic families to address the question: How often are aggressive interactions among closely related bird species asymmetric? We define asymmetry using (i) the proportion of contests won by one species, and (ii) statistical tests for asymmetric outcomes of aggressive contests. We calculate these asymmetries using data summed across different sites for each species pair, and compare results to asymmetries calculated using data separated by location. We find that 80% of species pairs had aggressive outcomes where one species won 80% or more of aggressive contests. We also find that the majority of aggressive interactions among closely related species show statistically significant asymmetries, and above a sample size of 52 interactions, all outcomes are asymmetric following binomial tests. Species pairs with dominance data from multiple sites showed the same dominance relationship across locations in 93% of the species pairs. Overall, our results suggest that the outcome of aggressive interactions among closely related species are usually consistent and asymmetric, and should thus favor ecological and evolutionary strategies specific to the position of a species within a dominance hierarchy.

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“…Dull coloration reduces interspecific male–male aggression (Sætre et al. ), and brown male pied flycatchers are allowed to settle closer to resident male collared flycatchers than black male pied flycatchers (Alatalo et al. ; Vallin et al.…”

Section: Climate‐driven Divergence In Sexual Display Traits and Assormentioning

confidence: 99%

“…First, dull coloration may mimic female coloration, thereby reducing male aggression (Sætre et al. ). The brown male phenotype of pied flycatchers has even been suggested to particularly mimic heterospecific females rather than intraspecific females (Calhim et al.…”

Section: Climate‐driven Divergence In Sexual Display Traits and Assormentioning

confidence: 99%

Climate adaptation and speciation: particular focus on reproductive barriers inFicedulaflycatchers

Qvarnström

Ålund

McFarlane

et al. 2015

Evolutionary Applications

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Climate adaptation is surprisingly rarely reported as a cause for the build‐up of reproductive isolation between diverging populations. In this review, we summarize evidence for effects of climate adaptation on pre‐ and postzygotic isolation between emerging species with a particular focus on pied (Ficedula hypoleuca) and collared (Ficedula albicollis) flycatchers as a model for research on speciation. Effects of climate adaptation on prezygotic isolation or extrinsic selection against hybrids have been documented in several taxa, but the combined action of climate adaptation and sexual selection is particularly well explored in Ficedula flycatchers. There is a general lack of evidence for divergent climate adaptation causing intrinsic postzygotic isolation. However, we argue that the profound effects of divergence in climate adaptation on the whole biochemical machinery of organisms and hence many underlying genes should increase the likelihood of genetic incompatibilities arising as side effects. Fast temperature‐dependent co‐evolution between mitochondrial and nuclear genomes may be particularly likely to lead to hybrid sterility. Thus, how climate adaptation relates to reproductive isolation is best explored in relation to fast‐evolving barriers to gene flow, while more research on later stages of divergence is needed to achieve a complete understanding of climate‐driven speciation.

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Experimental Evidence for Interspecific Female Mimicry in Sympatric Ficedula Flycatchers

Cited by 33 publications

References 0 publications

Dynamics of a clinal hybrid zone and a comparison with island hybrid zones of flycatchers (Ficedula hypoleuca and F. albicollis)

Dynamics of a clinal hybrid zone and a comparison with island hybrid zones of flycatchers (Ficedula hypoleuca and F. albicollis)

The outcomes of most aggressive interactions among closely related bird species are asymmetric

Climate adaptation and speciation: particular focus on reproductive barriers inFicedulaflycatchers

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