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Influence of ambient water coloration on habitat and conspecific choice in the female Lake Malawi cichlid, Metriaclima zebra

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Current Zoology 2024年第2期70卷 214-224页

作者： Noori Choj Nicolas Mathevon eileen a.hebets Marilyn Beauchaud School of Biological Sciences University of Nebraska-LincolnLincolnNEUSA ENES Bioacoustics Research Laboratory CRNLCNRSInsermUniversite de Saint-EtienneSaint-EtienneFrance Max Planck Institute of Animal Behavior KonstanzGerman

Female cichlid fish living in African great lakes are known to have sensory systems that are adapted to ambient light *** sen-sory system adaptations are hypothesized to have influenced the evolution of the diverse male nuptial *** rock-dwelling Lake Malawi mbuna cichlids,however,the extent to which ambient light environments influence female sensory systems and potentially associated male nuptial coloration remains ***,the ubiquitous blue flank coloration and UV reflection of male mbuna cichlids suggest the potential impacts of the blue-shifted ambient light environment on these cichlid's visual perception and male nuptial coloration in the shallow water depth in Lake *** the present study,we explored whether and how the sensory bias of females influences intersexual communication in the mbuna cichlid,Metriaclima zebra.A series of choice experiments in various light environments showed that *** females (1)have a pref-erence for the blue-shifted light environment,(2)prefer to interact with males in blue-shifted light environments,(3)do not show a preference between dominant and subordinate males in full-spectrum,long-wavelength filtered,and short-wavelength filtered light environments,and (4)show a"reversed"preference for subordinate males in the UV-filtered light *** results suggest that the visual perception of *** females may be biased to the ambient light spectra in their natural habitat by local adaptation and that this sensory bias may influence the evolution of blueand UV reflectivepatterns in male nuptial coloration.

关键词： ambient light environment Lake Malawi male coloration mbuna cichlids Metriaclima zebra sensory bias UV coloration UV perception visual communication.

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A signal-substrate match in the substrate-borne component of a multimodal courtship display

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Current Zoology 2010年第3期56卷 370-378页

作者： Damian O.ELIAS Andrew C.MASON eileen a.hebets Department of Environmental Science Policy and ManagementUniversity of California Integrative Behaviour and Neuroscience Group University of Toronto Scarborough School of Biological Sciences University of Nebraska

The environment can impose strong limitations on the efficacy of signal transmission. In particular, for vibratory communication, the signaling environment is often extremely heterogeneous at small scales. Nevertheless, natural selection is expected to select for signals well-suited for effective transmission. Here, we test for substrate-dependent signal efficacy in the wolf spider Schizocosa stridulans Strattou 1991. We first explore the transmission characteristics of this important signaling mo- dality by playing recorded substrate-bome signals through three different substrates （leaf litter, pine litter, and red clay） and measuring the propagated signal. We found that the substrate-bome signal of S. stridulans attenuates the least on leaf litter, the substrate upon which the species is naturally found. Next, by assessing mating success with artificially muted and non-muted males across different signaling substrates （leaf litter, pine litter, and sand）, we explored the relationship between substrate-bome signaling and signaling substrate for mating success. We found that muted males were unsuccessful in obtaining copulations re- gardless of substrate, while mating success was dependent on the signaling substrate for non-muted males. For non-muted males, more males copulated on leaf litter than any other substrate. Taken together, these results confLrm the importance of sub- strate-bome signaling in S. stridulans and suggest a match between signal properties and signal efficacy - leaf litter transmits the signal most effectively and males are most successful in obtaining copulations on leaf litter [Current Zoology 56 （3）： 370-378, 2010].

关键词： Environmental heterogeneity Sensory drive Mate choice Communication

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Demonstrating mate choice copying in spiders requires further research

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Current Zoology 2020年第2期66卷 215-216页

作者： R.Tucker GILMAN Kasey FOWLER-FINN eileen a.hebets School of Earth and Environmental Sciences The University of ManchesterManchesterUK Department of Biology Saint Louis UniversitySt.LouisUSA School of Biological Sciences University of Nebraska-LincolnLincolnNEUSA

Mate choice copying-when individuals learn to prefer mates or mate types that have been chosen by others-can influence trait evo-lution and speciation(Varela et al.2018;Dion et al.2019).Most examples of mate choice copying are from fish,birds,and mammals including humans(Varela et al.2018).However,2 invertebrate examples-fruit flies and wolf spiders-have been used to argue that the phenomenon may be phylogenetically widespread,and perhaps the rule rather than the exception in nature(Varela et al.2018).Here,we revisit the evidence for mate choice copying in wolf spiders(Fowler-Fimn et al.2015)in light of new data(Gilman et al.2018).Then,we discuss why mate choice copying is a phenomenon that is likely to occur in wolf spiders,and why this deserves attention.

关键词： invertebrates mate choice copying Schizocosa sexual selection speciation spiders

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Current Status and Future Directions of Research in Complex Signaling

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Current Zoology 2011年第2期57卷 I0001-I0005页

作者： eileen A. hebets School of Biological Sciences University of Nebraska Lincoln NE 68588 USA

1 Introduction The term ＇complex signaling＇ reflects a recent scientific focus on the multiple elements frequently incorporated into animal signals （reviewed in Candolin, 2003; hebets and Papaj, 2005; Partan and Marler, 2005; Bro-Jorgensen, 2010）. It embodies a new appreciation that signals used in communication are regularly composed of numerous components and that each component may individually vary in a number of ways.

关键词：信号组件通信

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Female mate choice for multimodal courtship and the importance of the signaling background for selection on male ornamentation

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Current Zoology 2013年第2期59卷 200-209页

作者： Jay A. STAFSTROM eileen A. hebets School of Biological Sciences University of Nebraska Lincoln NE 68588-0118 USA

Conspicuous visual ornaments are frequently incorporated into complex courtship displays that integrate signal com- ponents from multiple sensory modalities. Mature male Schizocosa crassipes （Walckenaer, 1837） wolf spiders wave, arch, and tap their ornamented forelegs in a visual courtship display that simultaneously incorporates seismic components. To determine the importance of modality-specific signal components in female mate choice, we used a signal ablation design and compared the mating frequency of female-male pairs across signaling environments with manipulated modality-specific transmission properties. We found that the successful transmission of isolated visual or seismic signaling was sufficient for mating success; neither sig- naling modality was necessary. Additionally, the environment enabling the successful transmission of composite, multimodal dis- plays yielded the highest mating frequencies. Our results indicate the presence of selection from S. crassipes females for multi- modal courtship and suggest that multimodal signaling may facilitate mating across variable signaling environments. We next ex- plored the influence of ornamentation per se on female choice by phenotypically manipulating males into two groups：（i） intact （brushes present） and （ii） shaved （brushes absent）. We compared the mating frequencies of intact versus shaved males in the presence versus absence of seismic signaling. Males with brushes intact had higher mating frequencies than shaved males, but only under specific signaling conditions - in the presence of seismic signaling. Female choice for male brushes then appears de- pendent on the signaling background, making brushes themselves an unlikely target of direct selection. Our results emphasize the complex nature of female choice, highlighting the potential for both trait interactions and environment-dependent selection [Cur- rent Zoology 59 （2）： 200-209, 2013].

关键词： Enhancement Environmental variability Inter-signal interaction Sexual selection

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Complex courtship success and plasticity environments displays facilitate in signaling across male reproductive variable

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Current Zoology 2011年第2期57卷 175-186页

作者： Dustin J. WILGERS eileen A. hebets School of Biological Sciences University of Nebraska-Lincoln Lincoln NE USA

Effective signal transmission is essential for communication. In environments where signal transmission is highly variable, signalers may utilize complex signals, which incorporate multiple components and modalities, to maintain effective communication. Male Rabidosa rabida wolf spiders produce complex courtship signals, consisting of both visual and seismic components. We test the hypothesis that the complex signaling of R. rabida contributes to male reproductive success in variable signaling environments. We first examine the condition-dependence of foreleg ornamentation （a presumed visual signal） and seismic signal components and find that both may provide potentially redundant information on foraging history. Next, we assessed reproductive success across manipulated signaling environments that varied in the effectiveness of visual and/or seismic signal transmission. In environments where only one signal could be successfully transmitted （e.g., visual or seismic）, pairs were still able to successfully copulate. Additionally, we found that males altered their courtship display depending on the current signaling environment. Specifically, males reduced their use of a visual display component in signaling environments where visual signal transmission was ablated. Incorporating signals in multiple modalities not only enables R. rabida males to maintain copulation success across variable signaling environments, but it also enables males to adjust their composite courtship display to current signaling conditions .

关键词： Communication Multimodal Signal evolution Condition-dependent Lycosidae Rabidosa rabida Efficacy back-up Redundant signals

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The complexities of female mate choice and male polymorphisms： Elucidating the role of genetics, age, and mate-choice copying

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Current Zoology 2015年第6期61卷 1015-1035页

作者： Kasey D. FOWLER-FINN Laura SULLIVAN-BECKERS Amy M. RUNCK eileen A. hebets School of Biological Sciences University of Nebraska Lincoln NE 68508 USA

Genetic, life history, and environmental factors dictate patterns of variation in sexual traits within and across popula- tions, and thus the action and outcome of sexual selection. This study explores patterns of inheritance, diet, age, and mate-choice copying on the expression of male sexual signals and associated female mate choice in a phenotypically diverse group of Schizo- cosa wolf spiders. Focal spiders exhibit one of two male phenotypes：＇omamented＇ males possess large black brushes on their fo- relegs, and ＇non-ornamented＇ males possess no brushes. Using a quantitative genetics breeding design in a mixed population of ornamented/non-ornamented males, we found a strong genetic basis to male phenotype and female choice. We also found that some ornamented males produced some sons with large brushes and others with barely visible brushes. Results of diet manipula- tions and behavioral mating trials showed no influence of diet on male phenotype or female mate choice. Age post maturation, however, influenced mate choice, with younger females being more likely to mate with ornamented males. A mate-choice copy- ing experiment found that, following observations of another female＇s mate choice/copulation, virgin mature females tended to match the mate choice （ornamented vs. non-ornamented males） of the females they observed. Finally, analyses of genetic varia- tion across phenotypically pure （only one male phenotype present） vs. mixed （both phenotypes present） populations revealed ge- netic distinction between phenotypes in phenotypically-pure populations, but no distinctionin phenotypically-mixed populations. The difference in patterns of genetic differentiation and mating across geographic locations suggests a complex network of fac- tors contributing to the outcome of sexual selection .

关键词： Male polymorphism Assortative mating Speciation Heritability Schizocosa

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A robust new metric of phenotypic distance to estimate and compare multiple trait differences among populations

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Current Zoology 2012年第3期58卷 426-439页

作者： Rebecca SAFRAN Samuel FLAXMAN Michael KOPP Darren E. IRWIN Derek BRIGGS Matthew R. EVANS W. Chris FUNK David A. GRAY eileen A. hebets Nathalie SEDDON Elizabeth SCORDATO Laurel B. SYMES Joseph A. TOBIAS David P. L. TOEWS J. Albert C. UY Department of Ecology and Evolutionary Biology University of Colorado Boulder CO 80309 U.S.A. Mathematics and B iosciences Group Faculty of Mathematics University of Vienna A-1090 Vienna Austria Current address Evolutionary Biology and Modeling Group Faculty of Sciences Aix-Marseille University 13331 Marseille France. Department of Zoology University of British Columbia 6270 University Boulevard Vancouver BC Canada V6T 1Z4. Research ＆ Evaluation Methodology School of Education University of Colorado Boulder CO 80309 U.S.A. School of Biological and Chemical Sciences Queen Mary University of London London E1 4NS Department of Biology Colorado State University Fort Collins CO 80523 U.S.A. Department of Biology California State University Northridge CA 91330 U.S.A. School of Biological Sciences University of Nebraska Lincoln NE 68588 U.S.A. Edward Grey Institute Department of Zoology University of Oxford Oxford OX1 3PS UK Committee on Evolutionary Biology The University of Chicago Chicago IL 60637U.S.A. Department of Biology Dartmouth College Hanover NH 03755 U.S.A. Department of Biology University of Miami Coral Gables FL 33146 U.S.A.

Whereas a rich literature exists for estimating population genetic divergence, metrics of phenotypic trait divergence are lacking, particularly for comparing multiple traits among three or more populations. Here, we review and analyze via simula- tion Hedges＇ g, a widely used parametric estimate of effect size. Our analyses indicate that g is sensitive to a combination of unequal trait variances and unequal sample sizes among populations and to changes in the scale of measurement. We then go on to derive and explain a new, non-parametric distance measure, ＇Aft＇, which is caiculated based upon a joint cumulative distribution function （CDF） from all populations under study. More precisely, distances are measured in terms of the percentiles in this CDF at which each population＇s median lies. Ap combines many desirable features of other distance metrics into a single metric; namely, compared to other metrics, p is relatively insensitive to unequal variances and sample sizes among the populations sam- pied. Furthermore, a key feature of Ap--and our main motivation for developing it--is that it easily accommodates simultaneous comparisons of any number of traits across any number of populations. To exemplify its utility, we employ Ap to address a ques- tion related to the role of sexual selection in speciation： are sexual signals more divergent than ecological traits in closely related taxa？ Using traits of known function in closely related populations, we show that traits predictive of reproductive performance are indeed, more divergent and more sexually dimorphic than traits related to ecological adaptation [Current Zoology 58 （3）： 426-439 2012].

关键词： Effect size Phenotype divergence Sexual dimorphism Sexual selection Speciation

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