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Author Girard, M.B.; Kasumovic, M.M.; Elias, D.O. url  doi
openurl 
  Title The role of red coloration and song in peacock spider courtship: insights into complex signaling systems Type Journal Article
  Year 2018 Publication Behavioral Ecology Abbreviated Journal  
  Volume in press Issue Pages  
  Keywords Animals  
  Abstract Research on animal signaling enhances our understanding of links between sensory processing, decision making, behavior, and evolution. Studies of sexually-selected signals may be particularly informative as mate choice provides access to decision patterns in the way that courtship leads to an easily observable behavioral output in choosers, i.e., mating. Male peacock spiders have some of the most elaborate and varied courtship displays known among animals. Particularly striking to human observers is the diversity of red, orange, and yellow ornaments that males exhibit across the genus. The primary objective of our research was to investigate how these visual ornaments interact with vibratory songs to affect female mating behavior of one species, Maratus volans. Accordingly, we conducted mating trials under a series of experimentally manipulated vibratory and lighting conditions. Contrary to expectation, chromatic characteristics of longer wavelength ornaments are not driving female mate choice decisions, despite their extensive presence on male fans. Instead, our results suggest that contrast is important to females. Additionally, we found that vibratory signals were not necessary and did not increase mating rates. Our study demonstrates the intricacies inherent in complex signaling systems.  
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  Series Volume Series Issue Edition  
  ISSN 1045-2249 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number (up) GFZ @ kyba @ Serial 2027  
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Author Shima, J.S.; Swearer, S.E. url  doi
openurl 
  Title Moonlight enhances growth in larval fish Type Journal Article
  Year 2018 Publication Ecology Abbreviated Journal Ecology  
  Volume in press Issue Pages  
  Keywords Animals; Moonlight  
  Abstract Moonlight mediates trophic interactions and shapes the evolution of life-history strategies for nocturnal organisms. Reproductive cycles and important life-history transitions for many marine organisms coincide with moon phases, but few studies consider the effects of moonlight on pelagic larvae at sea. We evaluated effects of moonlight on growth of pelagic larvae of a temperate reef fish using 'master chronologies' of larval growth constructed from age-independent daily increment widths recorded in otoliths of 321 individuals. We found that daily growth rates of fish larvae were enhanced by lunar illumination after controlling for the positive influence of temperature and the negative influence of cloud cover. Collectively, these results indicate that moonlight enhances growth rates of larval fish. This pattern is likely the result of moonlight's combined effects on foraging efficiency and suppression of diel migrations of mesopelagic predators, and has the potential to drive evolution of marine life histories. This article is protected by copyright. All rights reserved.  
  Address School of BioSciences, University of Melbourne, Melbourne, 3010, Australia  
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  Language English Summary Language Original Title  
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  Series Volume Series Issue Edition  
  ISSN 0012-9658 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:30422325 Approved no  
  Call Number (up) GFZ @ kyba @ Serial 2059  
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Author Maggi, E.; Benedetti-Cecchi, L. url  doi
openurl 
  Title Trophic compensation stabilizes marine primary producers exposed to artificial light at night Type Journal Article
  Year 2018 Publication Marine Ecology Progress Series Abbreviated Journal Mar. Ecol. Prog. Ser.  
  Volume 606 Issue Pages 1-5  
  Keywords Plants; Animals; Ecology  
  Abstract Artificial light at night (ALAN) is a widespread phenomenon along coastal areas. Despite increasing evidence of pervasive effects of ALAN on patterns of species distribution and abundance, the potential of this emerging threat to alter ecological processes in marine ecosystems has remained largely unexplored. Here, we show how exposure to white LED lighting, comparable to that experienced along local urbanized coasts, significantly enhanced the impact of grazing gastropods on epilithic microphytobenthos (MPB). ALAN increased both the photosynthetic biomass of MPB and the grazing pressure of gastropods, such that consumers compensated for the positive effect of night lighting on primary producers. Our results indicate that trophic interactions can provide a stabilizing compensatory mechanism against ALAN effects in natural food webs.  
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  Series Volume Series Issue Edition  
  ISSN 0171-8630 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number (up) GFZ @ kyba @ Serial 2063  
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Author Owens, A.C.S.; Lewis, S.M. url  doi
openurl 
  Title The impact of artificial light at night on nocturnal insects: A review and synthesis Type Journal Article
  Year 2018 Publication Ecology and Evolution Abbreviated Journal Ecol Evol  
  Volume 8 Issue 22 Pages 11337-11358  
  Keywords Animals; Review  
  Abstract In recent decades, advances in lighting technology have precipitated exponential increases in night sky brightness worldwide, raising concerns in the scientific community about the impact of artificial light at night (ALAN) on crepuscular and nocturnal biodiversity. Long-term records show that insect abundance has declined significantly over this time, with worrying implications for terrestrial ecosystems. The majority of investigations into the vulnerability of nocturnal insects to artificial light have focused on the flight-to-light behavior exhibited by select insect families. However, ALAN can affect insects in other ways as well. This review proposes five categories of ALAN impact on nocturnal insects, highlighting past research and identifying key knowledge gaps. We conclude with a summary of relevant literature on bioluminescent fireflies, which emphasizes the unique vulnerability of terrestrial light-based communication systems to artificial illumination. Comprehensive understanding of the ecological impacts of ALAN on diverse nocturnal insect taxa will enable researchers to seek out methods whereby fireflies, moths, and other essential members of the nocturnal ecosystem can coexist with humans on an increasingly urbanized planet.  
  Address Department of Biology Tufts University Medford Massachusetts  
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  Language English Summary Language Original Title  
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  Series Volume Series Issue Edition  
  ISSN 2045-7758 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:30519447; PMCID:PMC6262936 Approved no  
  Call Number (up) GFZ @ kyba @ Serial 2132  
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Author Halfwerk, W.; Blaas, M.; Kramer, L.; Hijner, N.; Trillo, P.A.; Bernal, X.E.; Page, R.A.; Goutte, S.; Ryan, M.J.; Ellers, J. url  doi
openurl 
  Title Adaptive changes in sexual signalling in response to urbanization Type Journal Article
  Year 2018 Publication Nature Ecology & Evolution Abbreviated Journal Nat Ecol Evol  
  Volume 3 Issue Pages 374-380  
  Keywords Animals  
  Abstract Urbanization can cause species to adjust their sexual displays, because the effectiveness of mating signals is influenced by environmental conditions. Despite many examples that show that mating signals in urban conditions differ from those in rural conditions, we do not know whether these differences provide a combined reproductive and survival benefit to the urban phenotype. Here we show that male tungara frogs have increased the conspicuousness of their calls, which is under strong sexual and natural selection by signal receivers, as an adaptive response to city life. The urban phenotype consequently attracts more females than the forest phenotype, while avoiding the costs that are imposed by eavesdropping bats and midges, which we show are rare in urban areas. Finally, we show in a translocation experiment that urban frogs can reduce risk of predation and parasitism when moved to the forest, but that forest frogs do not increase their sexual attractiveness when moved to the city. Our findings thus reveal that urbanization can rapidly drive adaptive signal change via changes in both natural and sexual selection pressures.  
  Address Department of Ecological Science, Vrije Universiteit, Amsterdam, The Netherlands  
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  Language English Summary Language Original Title  
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  Series Volume Series Issue Edition  
  ISSN 2397-334X ISBN Medium  
  Area Expedition Conference  
  Notes PMID:30532046 Approved no  
  Call Number (up) GFZ @ kyba @ Serial 2136  
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