Browsing by Advisor "Balakrishnan, Rohini"
Now showing items 1-16 of 16
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Acoustic Signals, Mate Choice And Mate Sampling Strategies in a Field Cricket
(2017-10-05)Acoustic communication in orthopterans and anurans provides a suitable model system for studying the evolutionary mechanisms of sexual selection mainly because males use acoustic signals to attract females over long distances ... -
The benefits and costs of flexible alternative reproductive tactics in Oecanthus henryi
Alternative reproductive tactics (ARTs) are distinct phenotypes that individuals of a species use to maximize reproductive success. This thesis investigates the persistence and adaptive value of flexible ARTs in male tree ... -
Call Diversity, Spatio-Temporal Patterning And Masking Interference In An Assemblage Of Acoustically Communicating Ensiferan Species Of A Tropical Evergreen Forest In Southern India
(2011-02-21)The present study provides the first description of the calls of a multi-species ensiferan assemblage in a tropical evergreen forest of the Indian subcontinent. I have identified and described the calls of twenty ensiferan ... -
Condition-dependent signalling and mating behaviour in the tree cricket, Oecanthus henryi
Male reproductive success in systems exhibiting sexually selected traits can be driven by male mating effort in sexual signals and in the production of nuptial gifts. Male mating effort can be determined by various biotic ... -
Distribution, activity budget and feeding ecology of Himalayan gray langur (Semnopithecus ajax) in Kashmir Himalaya
Colobines are group of primates known to inhabit harsh environments. These habitats pose different challenges which they have coped up physiologically and behaviourally. Primates in such environments are subjected to ... -
Ecology of predator-prey interactions in the context of mate searching
Animals communicating in the context of mate searching benefit by increasing their likelihood of encountering mates. Mate searching begins the important process of individuals of opposite sexes forming pairs, which is ... -
Foraging Decisions of the Lesser False Vampire Bat, Megaderma Spasma in a Heterogeneous Landscape
Predators make various foraging decisions at different spatial and temporal scales. Such decisions can be studied at two levels: patch decisions at the landscape level, and prey decisions at the foraging patch level. In ... -
Habitat Acoustics And Microhabitat Selection In An Ensiferan Assemblage Of A Tropical Evergreen Forest │
(2013-08-29)Several animals, both vertebrate and invertebrate, communicate using sound and they do so in a non-ideal medium, the habitat in which they live. As acoustic signals pass through the habitat, they suffer loss of information ... -
Investigating Pattern Recognition And Bi-coordinate Sound Localization in the Tree Cricket Species Oecanthus Henryi
(2017-09-20)Acoustic communication, used by a wide variety of animals, consists of the signaler, the signal and the receiver. A change in the behaviour of the receiver after reception of the signal is a prerequisite for communication. ... -
Mate Choice, Mate Sampling And Baffling Behaviour In The Tree Cricket Oecanthus henryi
(2017-07-12)Among the different sensory modalities that play a role in sexual selection, acoustic communication plays an important one. Acoustic communication has been known to be used for male-male competition (territory maintenance, ... -
Multimodal Duetting and Pair Formation in a Paleotropical False Leaf Katydid, Onomarchus uninotatus
The spectacular diversity in the pair-formation strategies among animal groups has attracted the attention of many over the years. The roots of this diversity lie in the diversity of challenges that males and females face ... -
The Prediction Of Field Cricket Phonotaxis In Complex Acoustic Environments
(2010-09-24)Animals detect, recognize and localize relevant objects in noisy, multi-source environments. Female crickets locate potential mates in choruses of simultaneously calling males using acoustic signals, a behaviour termed ... -
Risks of finding mates in the wild: Ecological and Behavioural Determinants of Sex-biased Predation
Sex-biased predation occurs when one sex of a prey species is consumed more than the other, irrespective of their relative availability (sex-ratio). Some of the potential factors leading to sex- biased predation are sex ... -
Sensory Ecology Of Acoustic Communication In The Tropical Bushcricket Genus Mecopoda : Mechanisms And Evolution Of Synchrony
(2009-07-10)In this thesis, I characterise five species of the bushcricket genus Mecopoda with respect to their acoustic signals and morphology and investigate the phenomenon of acoustic synchrony in one of these five species: Mecopoda ... -
The Structure And Function Of The Vocal Repertoire Of The Greater Racket-Tailed Drongo (Dicrurus paradiseus) : Insights Into Avian Vocal Mimicry
(2017-07-12)Sound is used as a medium for communication by taxa as varied as insects, fish, amphibians, birds and mammals. In some birds like the suboscines, song is genetically encoded, whereas in parrots, hummingbirds and oscines, ... -
Systematics, Phylogeny And Acoustic Evolution In Field Crickets (Orthoptera, Grylloidea, Gryllinae)
(2018-03-06)Since several decades, field crickets of the subfamily Gryllinae under order Orthoptera have been used as a model group by researchers working in the field of neuroethology, behavioural ecology and bioacoustics. Subfamily ...