toggle visibility Search & Display Options

Select All    Deselect All
 |   | 
Details
   print
  Records Links
Author Rajaraman, K.; Godthi, V.; Pratap, R.; Balakrishnan, R. url  openurl
  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.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes (up) Approved no  
  Call Number CES @ dilipnaidu.gt @ Serial 43000  
Permanent link to this record
 

 
Author Mitra, A.; Palavalli Nettimi, R.; Ramachandran, A.; Saha, P.; Gadagkar, R. doi  openurl
  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  
  Keywords  
  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).  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1420-9098 ISBN Medium  
  Area Expedition Conference  
  Notes (up) Approved no  
  Call Number CES @ dilipnaidu.gt @ Serial 43004  
Permanent link to this record
 

 
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. doi  openurl
  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  
  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1365-2486 ISBN Medium  
  Area Expedition Conference  
  Notes (up) Approved no  
  Call Number CES @ dilipnaidu.gt @ Serial 43015  
Permanent link to this record
 

 
Author Guttal, V. openurl 
  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  
  Keywords  
  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes (up) Approved no  
  Call Number CES @ dilipnaidu.gt @ Serial 43017  
Permanent link to this record
 

 
Author Mandal, S.; Gadagkar, R. doi  openurl
  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  
  Keywords  
  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.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1432-1351 ISBN Medium  
  Area Expedition Conference  
  Notes (up) Approved no  
  Call Number CES @ dilipnaidu.gt @ Serial 43021  
Permanent link to this record
 

 
Author Borges, R.M. openurl 
  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  
  Keywords  
  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes (up) Approved no  
  Call Number CES @ dilipnaidu.gt @ Serial 43028  
Permanent link to this record
 

 
Author Deepak, V.; Vyas, R.; Giri, V.B.; Karanth, K.P. openurl 
  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  
  Keywords  
  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1864-5755 ISBN Medium  
  Area Expedition Conference  
  Notes (up) Approved no  
  Call Number CES @ dilipnaidu.gt @ Serial 43033  
Permanent link to this record
 

 
Author Gadagkar, R. openurl 
  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  
  Keywords  
  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes (up) Approved no  
  Call Number CES @ dilipnaidu.gt @ Serial 43034  
Permanent link to this record
 

 
Author Naniwadekar, R.; Shukla, U.; Isvaran, K.; Datta, A. url  openurl
  Title Reduced Hornbill Abundance Associated with Low Seed Arrival and Altered Recruitment in a Hunted and Logged Tropical Forest Type Journal Article
  Year 2015 Publication Abbreviated Journal PLoS ONE  
  Volume 10 Issue 3 Pages e0120062  
  Keywords  
  Abstract Logging and hunting are two key direct threats to the survival of wildlife in the tropics, and also disrupt important ecosystem processes. We investigated the impacts of these two factors on the different stages of the seed dispersal cycle, including abundance of plants and their dispersers and dispersal of seeds and recruitment, in a tropical forest in north-east India. We focused on hornbills, which are important seed dispersers in these forests, and their food tree species. We compared abundances of hornbill food tree species in a site with high logging and hunting pressures (heavily disturbed) with a site that had no logging and relatively low levels of hunting (less disturbed) to understand logging impacts on hornbill food tree abundance. We compared hornbill abundances across these two sites. We, then, compared the scatter-dispersed seed arrival of five large-seeded tree species and the recruitment of four of those species. Abundances of hornbill food trees that are preferentially targeted by logging were two times higher in the less disturbed site as compared to the heavily disturbed site while that of hornbills was 22 times higher. The arrival of scatter-dispersed seeds was seven times higher in the less disturbed site. Abundances of recruits of two tree species were significantly higher in the less disturbed site. For another species, abundances of younger recruits were significantly lower while that of older recruits were higher in the heavily disturbed site. Our findings suggest that logging reduces food plant abundance for an important frugivore-seed disperser group, while hunting diminishes disperser abundances, with an associated reduction in seed arrival and altered recruitment of animal-dispersed tree species in the disturbed site. Based on our results, we present a conceptual model depicting the relationships and pathways between vertebrate-dispersed trees, their dispersers, and the impacts of hunting and logging on these pathways.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes (up) Approved no  
  Call Number CES @ dilipnaidu.gt @ Serial 43037  
Permanent link to this record
 

 
Author Ramachandra, T.V.; Bharath, A.H.; Sowmyashree, M.V. url  openurl
  Title Monitoring urbanization and its implications in a mega city from space: Spatiotemporal patterns and its indicators Type Journal Article
  Year 2015 Publication Abbreviated Journal Journal of Environmental Management  
  Volume 148 Issue Pages 67-81  
  Keywords Delhi; Remote sensing; Spatial metrics; Urbanization; Urban sprawl  
  Abstract  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0301-4797 ISBN Medium  
  Area Expedition Conference  
  Notes (up) Approved no  
  Call Number CES @ dilipnaidu.gt @ Serial 43048  
Permanent link to this record
Select All    Deselect All
 |   | 
Details
   print

Save Citations:
Export Records: