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Author Schmidt, A.K.D.; Balakrishnan, R.
Title Ecology of acoustic signalling and the problem of masking interference in insects Type Journal Article
Year 2015 Publication Abbreviated Journal Journal of Comparative Physiology A
Volume 201 Issue 1 Pages 133-142
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Abstract The efficiency of long-distance acoustic signalling of insects in their natural habitat is constrained in several ways. Acoustic signals are not only subjected to changes imposed by the physical structure of the habitat such as attenuation and degradation but also to masking interference from co-occurring signals of other acoustically communicating species. Masking interference is likely to be a ubiquitous problem in multi-species assemblages, but successful communication in natural environments under noisy conditions suggests powerful strategies to deal with the detection and recognition of relevant signals. In this review we present recent work on the role of the habitat as a driving force in shaping insect signal structures. In the context of acoustic masking interference, we discuss the ecological niche concept and examine the role of acoustic resource partitioning in the temporal, spatial and spectral domains as sender strategies to counter masking. We then examine the efficacy of different receiver strategies: physiological mechanisms such as frequency tuning, spatial release from masking and gain control as useful strategies to counteract acoustic masking. We also review recent work on the effects of anthropogenic noise on insect acoustic communication and the importance of insect sounds as indicators of biodiversity and ecosystem health.
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ISSN 1432-1351 ISBN Medium
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Notes Approved (up) no
Call Number CES @ dilipnaidu.gt @ Serial 42988
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Author Chanam, J.; Kasinathan, S.; Pramanik, G.K.; Jagdeesh, A.; Joshi, K.A.; Borges, R.M.
Title Foliar extrafloral nectar of Humboldtia brunonis (Fabaceae), a paleotropic ant–plant, is richer than phloem sap and more attractive than honeydew Type Journal Article
Year 2015 Publication Abbreviated Journal Biotropica
Volume 47 Issue 1 Pages 1-5
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ISSN 1744-7429 ISBN Medium
Area Expedition Conference
Notes Approved (up) no
Call Number CES @ dilipnaidu.gt @ Serial 42992
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Author Rajaraman, K.; Godthi, V.; Pratap, R.; Balakrishnan, R.
Title A novel acoustic-vibratory multimodal duet Type Journal Article
Year 2015 Publication Abbreviated Journal J. Exp. Biol.
Volume 218 Issue 19 Pages 3042
Keywords
Abstract The communication strategy of most crickets and bushcrickets typically consists of males broadcasting loud acoustic calling songs, while females perform phonotaxis, moving towards the source of the call. Males of the pseudophylline bushcricket species Onomarchus uninotatus produce an unusually low-pitched call, and we found that the immediate and most robust response of females to the male acoustic call was a bodily vibration, or tremulation, following each syllable of the call. We hypothesized that these bodily oscillations might send out a vibrational signal along the substrate on which the female stands, which males could use to localize her position. We quantified these vibrational signals using a laser vibrometer and found a clear phase relationship of alternation between the chirps of the male acoustic call and the female vibrational response. This system therefore constitutes a novel multimodal duet with a reliable temporal structure. We also found that males could localize the source of vibration but only if both the acoustic and vibratory components of the duet were played back. This unique multimodal duetting system may have evolved in response to higher levels of bat predation on searching bushcricket females than calling males, shifting part of the risk associated with partner localization onto the male. This is the first known example of bushcricket female tremulation in response to a long-range male acoustic signal and the first known example of a multimodal duet among animals.
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Call Number CES @ dilipnaidu.gt @ Serial 43000
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Author Mitra, A.; Palavalli Nettimi, R.; Ramachandran, A.; Saha, P.; Gadagkar, R.
Title Males and females of the social wasp Ropalidia marginata do not differ in their cuticular hydrocarbon profiles and do not seem to use any long-distance volatile mate attraction cues Type Journal Article
Year 2015 Publication Abbreviated Journal Insectes Sociaux
Volume 62 Issue 3 Pages 281-289
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Abstract Sex pheromones are vital in communication between individuals belonging to opposite sexes and form an integral part of the reproductive biology of various species. Among insects, sexual dimorphism in CHCs has been reported from diverse taxa spanning seven different orders, and thereby CHCs have been implicated as sex pheromones. Because males and females of the primitively eusocial wasp Ropalidia marginata touch each other with their antennae during mating, before engaging in sperm transfer, a sex pheromone that is perceived via contact chemosensation through the antennae can possibly exist in this species. Since CHCs have been implied as sex pheromones in various insects (including hymenopterans), and since sexual dimorphism of CHCs should be an obligatory prerequisite for them to act as sex pheromones, we investigated whether males and females of R. marginata differ in their CHC profiles. We found only nonvolatile CHCs, and our results show absence of sexual dimorphism in CHCs, suggesting that CHCs do not function as sex pheromone in this species. A behavioral assay failed to show presence of mate attraction at a distance, thereby showing the absence of volatile long-distance mate attraction cues (that may originate from sources other than and in addition to CHCs).
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Language Summary Language Original Title
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ISSN 1420-9098 ISBN Medium
Area Expedition Conference
Notes Approved (up) no
Call Number CES @ dilipnaidu.gt @ Serial 43004
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Author Anderson-Teixeira, K.J.; Davies, S.J.; Bennett, A.C.; Gonzalez-Akre, E.B.; Muller-Landau, H.C.; Joseph Wright, S.; Abu Salim, K.; Almeyda Zambrano, A.M.; Alonso, A.; Baltzer, J.L.; Basset, Y.; Bourg, N.A.; Broadbent, E.N.; Brockelman, W.Y.; Bunyavejchewin, S.; Burslem, D.F.R.P.; Butt, N.; Cao, M.; Cardenas, D.; Chuyong, G.B.; Clay, K.; Cordell, S.; Dattaraja, H.S.; Deng, X.; Detto, M.; Du, X.; Duque, A.; Erikson, D.L.; Ewango, C.E.N.; Fischer, G.A.; Fletcher, C.; Foster, R.B.; Giardina, C.P.; Gilbert, G.S.; Gunatilleke, N.; Gunatilleke, S.; Hao, Z.; Hargrove, W.W.; Hart, T.B.; Hau, B.C.H.; He, F.; Hoffman, F.M.; Howe, R.W.; Hubbell, S.P.; Inman-Narahari, F.M.; Jansen, P.A.; Jiang, M.; Johnson, D.J.; Kanzaki, M.; Kassim, A.R.; Kenfack, D.; Kibet, S.; Kinnaird, M.F.; Korte, L.; Kral, K.; Kumar, J.; Larson, A.J.; Li, Y.; Li, X.; Liu, S.; Lum, S.K.Y.; Lutz, J.A.; Ma, K.; Maddalena, D.M.; Makana, J.-R.; Malhi, Y.; Marthews, T.; Mat Serudin, R.; McMahon, S.M.; McShea, W.J.; Memiaghe, H.R.; Mi, X.; Mizuno, T.; Morecroft, M.; Myers, J.A.; Novotny, V.; de Oliveira, A.A.; Ong, P.S.; Orwig, D.A.; Ostertag, R.; den Ouden, J.; Parker, G.G.; Phillips, R.P.; Sack, L.; Sainge, M.N.; Sang, W.; Sri-ngernyuang, K.; Sukumar, R.; Sun, I.-F.; Sungpalee, W.; Suresh, H.S.; Tan, S.; Thomas, S.C.; Thomas, D.W.; Thompson, J.; Turner, B.L.; Uriarte, M.; Valencia, R.; Vallejo, M.I.; Vicentini, A.; Vrška, T.; Wang, X.; Wang, X.; Weiblen, G.; Wolf, A.; Xu, H.; Yap, S.; Zimmerman, J.
Title CTFS-ForestGEO: a worldwide network monitoring forests in an era of global change Type Journal Article
Year 2015 Publication Abbreviated Journal Global Change Biology
Volume 21 Issue 2 Pages 528-549
Keywords biodiversity; Center for Tropical Forest Science (CTFS); climate change; demography; forest dynamics plot; Forest Global Earth Observatory (ForestGEO); long-term monitoring; spatial analysis
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ISSN 1365-2486 ISBN Medium
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Notes Approved (up) no
Call Number CES @ dilipnaidu.gt @ Serial 43015
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Author Guttal, V.
Title Classroom: Discovering facts – Finding the Longest Day with School Children Type Journal Article
Year 2015 Publication Abbreviated Journal Resonance
Volume 20 Issue 3 Pages 254-259
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Call Number CES @ dilipnaidu.gt @ Serial 43017
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Author Mandal, S.; Gadagkar, R.
Title Homing abilities of the tropical primitively eusocial paper wasp Ropalidia marginata Type Journal Article
Year 2015 Publication Abbreviated Journal Journal of Comparative Physiology A
Volume 201 Issue 8 Pages 795-802
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Abstract Compared to our extensive knowledge about the navigation and homing abilities of ants and bees, we know rather little about these phenomena in social wasps. Here, we report the homing abilities of the tropical primitively eusocial wasp Ropalidia marginata and the factors that affect their homing success. To determine from how far these wasps can return to their nests, we transported foragers blindfold and released them at gradually increasing distances from their nests in four cardinal directions. Their homing success was determined by checking their presence on their nests on three consecutive nights. All foragers (56 individuals, 115 releases) returned back from an area of 0.73 ± 0.25 km2 on the day of release (minimal homing area), whereas 83.8 % of the foragers (217 individuals, 420 releases) returned when we enlarged the area of release to 6.22 ± 0.66 km2 around their nests (maximal homing area). Of 66 releases, no wasps returned from beyond the maximal homing area. The minimal homing area might be familiar to the foragers because they probably routinely forage in this area and the maximal homing area represents the maximum distances from which the wasps are capable of returning to their nests, with or without familiarity.
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ISSN 1432-1351 ISBN Medium
Area Expedition Conference
Notes Approved (up) no
Call Number CES @ dilipnaidu.gt @ Serial 43021
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Author Borges, R.M.
Title How mutualisms between plants and insects are stabilized Type Journal Article
Year 2015 Publication Abbreviated Journal Current Science
Volume 108 Issue 10 Pages 1862-1868
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Call Number CES @ dilipnaidu.gt @ Serial 43028
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Author Deepak, V.; Vyas, R.; Giri, V.B.; Karanth, K.P.
Title A taxonomic mystery for more than 180 years: the identity and systematic position of Brachysaura minor (HARDWICKE & GRAY, 1827) Type Journal Article
Year 2015 Publication Abbreviated Journal Vertebrate Zoology
Volume 65 Issue 3 Pages 371-381
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ISSN 1864-5755 ISBN Medium
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Notes Approved (up) no
Call Number CES @ dilipnaidu.gt @ Serial 43033
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Author Gadagkar, R.
Title How should biologists engage with controversial mathematical theory? Type Journal Article
Year 2015 Publication Abbreviated Journal Current Science
Volume 108 Issue 10 Pages 1869-1873
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Call Number CES @ dilipnaidu.gt @ Serial 43034
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