Field but not lab paradigms support generalisation by predators of aposematic polymorphic prey: the Oophaga histrionica complex

Amézquita, Adolfo; Castro, Laura De; Arias, Mónica; González, Mabel; Esquivel, Carolina

doi:10.1007/s10682-013-9635-1

Cited by 34 publications

(28 citation statements)

References 24 publications

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“…In contrast, hue was found to be least important with respect to assortment, and therefore, hue may more strongly be influenced by natural selection, a conclusion consistent with a number of other studies (e.g., Noonan & Comeault ; Chouteau & Angers ; Amezquita et al. ). Studies on other dendrobatids, such as Oophaga histrionica, Ranitomeya imitator, and Dendrobates tinctorius , have found novel color morphs to be selected by predators more often than local morphs, further suggesting that natural selection is acting on the hue of these frogs (Noonan & Comeault ; Chouteau & Angers ; Amezquita et al.…”

Section: Discussionsupporting

confidence: 88%

“…Studies on other dendrobatids, such as Oophaga histrionica, Ranitomeya imitator, and Dendrobates tinctorius , have found novel color morphs to be selected by predators more often than local morphs, further suggesting that natural selection is acting on the hue of these frogs (Noonan & Comeault ; Chouteau & Angers ; Amezquita et al. ). The findings of the present study, coupled with those of previous studies, suggest that brightness and chroma are maintained mainly by sexual selection and hue is more strongly impacted by natural selection as an aposematic trait.…”

Section: Discussionmentioning

confidence: 99%

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Color Assortative Mating in a Mainland Population of the Poison Frog Oophaga pumilio

2016

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Assortative mating is a reproductive strategy used by a diversity of animals, in which individuals choose a mate that shares similar characteristics. This mating strategy has the potential to promote the evolution of various sexual signals and has been a proposed mechanism driving and maintaining color variation in the anuran family Dendrobatidae. Most studies have examined this reproductive strategy in the polytypic poison frog, Oophaga pumilio, in the Bocas del Toro archipelago in Panama. Little attention, however, has been given to ancestral populations across this species’ mainland range, where dramatic color polytypism appears to lack. Additionally, most studies are exclusively experimental and investigate mate choice between allopatric populations, neglecting the behaviors of naturally occurring mates. This study observed natural mating pairs within a population of O. pumilio on mainland Costa Rica and tested the prediction that color phenotype of mating females and males would be correlated. Naturally occurring pairs were found to share similar coloration, suggesting that color assortative mating operates in nature, and in a mainland population. Our results indicate that coloration is an important trait in driving the natural mate choices of female O. pumilio, which provides valuable insight into realistic mate selection tactics of this dendrobatid frog.

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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Color Assortative Mating in a Mainland Population of the Poison Frog Oophaga pumilio

2016

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“…My work in concert with that of Nokelainen (2013) raises the question whether greater predator generalization might permit increased warning signal variation in northern areas, but much additional behavioral work is needed to probe the question. At the same time, recent evidence in some poison frog systems (Richards-Zawacki et al 2013, Amézquita et al 2013) and from examining a number of aposematic taxa (Alice Exnerová and Pavel Štys, personal communication) may lead to a conclusion that generalization occurs to a higher degree in the tropics than previously thought. An empirical finding that any latitudinal behavioral differences in generalization behavior exist would be illuminating in discussions of biogeographic patterns of diversity (see also Ricklefs 2009).…”

Section: Figurementioning

confidence: 95%

“…Generalized avoidance of warning signals should result in weakened positive FDS (Ihalainen et al 2012). A recent on Oophaga histrionica found some evidence to suggest predators generalized their avoidance to warning signals that differed in color and pattern of foreign warning signals (Amézquita et al 2013).…”

Section: Frequency-dependent Selectionmentioning

confidence: 99%

Influences of geographic differentiation in the forewing warning signal of the wood tiger moth in Alaska

Hegna

Mappes

2014

Evol Ecol

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Geographic Variation in the WarningSignals of the Wood Tiger Moth (Parasemia plantaginis; Arctiidae)Esitetään Jyväskylän yliopiston matemaattis-luonnontieteellisen tiedekunnan suostumuksella julkisesti tarkastettavaksi yliopiston Ylistönrinteellä, salissa YAA303 marraskuun 8. päivänä 2013 kello 12.Academic dissertation to be publicly discussed, Warning signals are not expected to be diverse because they are under stabilizing selection. This dissertation aims to study historic and contemporary selection mechanisms underlying the geographic warning signal diversity in the wood tiger moth (Parasemia plantaginis). In the first study, I explored the variation in hindwing warning color frequencies across the distribution of P. plantaginis and the phylogeography of the species. Males have polymorphic hindwing color (yellow or white) across much of their distribution but turn reddish in the Caucasus and mostly white in Japan, which coincide with mitogenetic divergence. Females vary continuously in hindwing warning color between yellow and red, becoming yellow east of the Ural mountain range, but does not correspond to mitogenetic divergence. Post-glacial isolation may be one contributing factor to the genetic divergence and the hindwing warning signal differences in the Caucasus region. In the second study, I found that thermoregulation benefits of melanin can trade-off with a larger more effective warning signal, which contributes to variation in melanization within Europe. In the third study, I found that forewing patterns function as warning signals and that generalization by predators might play an important role in warning signal diversity along with frequency dependent selection. In the fourth chapter, I found three populations in Japan differing in warning signal traits with some gene flow suggesting both selection and isolation may be underlying causes. Overall, my results suggest that historical and abiotic factors contribute to the observed warning signal diversity in P. plantaginis, rather than predation alone. This adds to our understanding of how historical factors along with environmental heterogeneity in biotic and abiotic factors can promote warning signal diversity. My results highlight the need to take an integrated approach to studying geographic diversity in warning signals.

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“…Eccard and Ylönen 2006). The change to a poor diet was given as an incentive for the animals to keep foraging in the novel environment of our study systems and counteract neophobia expected in satiated animals (Amézquita et al 2013; Näslund and Johnsson 2016). All applicable international, national, and/or institutional guidelines for the use of animals were followed and were approved by the animal experimentation committee of the University of Jyväskylä, permit number: ESAVI/6370/04.10.07/2014.…”

Section: Methodsmentioning

confidence: 99%

Olfactory cues and the value of information: voles interpret cues based on recent predator encounters

Bleicher

Ylönen

Käpylä

et al. 2018

Behav Ecol Sociobiol

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Prey strategically respond to the risk of predation by varying their behavior while balancing the tradeoffs of food and safety. We present here an experiment that tests the way the same indirect cues of predation risk are interpreted by bank voles, Myodes glareolus, as the game changes through exposure to a caged weasel. Using optimal patch use, we asked wild-caught voles to rank the risk they perceived. We measured their response to olfactory cues in the form of weasel bedding, a sham control in the form of rabbit bedding, and an odor-free control. We repeated the interviews in a chronological order to test the change in response, i.e., the changes in the value of the information. We found that the voles did not differentiate strongly between treatments pre-exposure to the weasel. During the exposure, vole foraging activity was reduced in all treatments, but proportionally increased in the vicinity to the rabbit odor. Post-exposure, the voles focused their foraging in the control, while the value of exposure to the predator explained the majority of variation in response. Our data also suggested a sex bias in interpretation of the cues. Given how the foragers changed their interpretation of the same cues based on external information, we suggest that applying predator olfactory cues as a simulation of predation risk needs further testing. For instance, what are the possible effective compounds and how they change “fear” response over time. The major conclusion is that however effective olfactory cues may be, the presence of live predators overwhelmingly affects the information voles gained from these cues.Significance statementIn ecology, “fear” is the strategic response to cues of risk an animal senses in its environment. The cues suggesting the existence of a predator in the vicinity are weighed by an individual against the probability of encounter with the predator and the perceived lethality of an encounter with the predator. The best documented such response is variation in foraging tenacity as measured by a giving-up density. In this paper, we show that an olfactory predator cue and the smell of an interspecific competitor result in different responses based on experience with a live-caged predator. This work provides a cautionary example of the risk in making assumptions regarding olfactory cues devoid of environmental context.Electronic supplementary materialThe online version of this article (10.1007/s00265-018-2600-9) contains supplementary material, which is available to authorized users.

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Field but not lab paradigms support generalisation by predators of aposematic polymorphic prey: the Oophaga histrionica complex

Cited by 34 publications

References 24 publications

Color Assortative Mating in a Mainland Population of the Poison Frog Oophaga pumilio

Color Assortative Mating in a Mainland Population of the Poison Frog Oophaga pumilio

Influences of geographic differentiation in the forewing warning signal of the wood tiger moth in Alaska

Olfactory cues and the value of information: voles interpret cues based on recent predator encounters

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