Browsing Centre for Ecological Sciences (CES) by Subject "Ecology"
Now showing items 1-20 of 35
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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 ... -
Ants, Figs, Fig Wasps : The Chemical Ecology Of A Multitrophic System
(2013-04-01)Plant–animal interaction systems are complex food webs where the members—plants, pollinators, herbivores, parasites and predators of the pollinators/herbivores—interact with each other in ways which maximize their own ... -
Attributes Of Royalty In The Primitively Eusocial Wasp Ropalidia marginata : Pheromone, Ovaries And Behavior
(2012-12-07)This thesis has looked at the proximate mechanisms by which eusociality is maintained in colonies of the primitively eusocial wasp Ropalidia marginata. Unlike other typical primitively eusocial species, the R, marginata ... -
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 ... -
Causes and Consequences of Hetrospecific Foraging Associations in Terrestrial Bird Communities
(2018-04-12)The question of group-living in animals has attracted a lot of research attention. Today, we have a nuanced understanding of ultimate explanations and proximate mechanisms for group-living, as well as the genetic basis for ... -
Colony Founding And The Evolution Of Eusociality In Primitively Eusocial Wasp, Ropalidia Marginata
(Indian Institute of Science, 2005-08-08)Many animals live in societies of varying degrees of organization. Some individuals in these societies seem to sacrifice their own fitness to increase the fitness of some others. Understanding the forces that mould the ... -
Determinants Of Behavioural And Reproductive Dominance In The Primitively Eusocial Wasp Ropalidia Marginata
(2016-09-15)In societies where all individuals are reproductively totipotent and yet, at a given time only one of them reproduces, it is interesting to examine the factor(s) that may influence and predict who will be the reproductive. ... -
The Distribution, Dynamics & Impacts Of Invasive Lantana Camara In A Seasonal Forest Of Mudumalai, Southern India
(2016-04-25)Species that become naturalized in a new geographical range, subsequently multiply and spread, and persist to the detriment of resident communities, are known as alien invasive species. Two aspects of species invasion – ... -
Divided They Stay : Species Coexistence In A Community Of Mutualists And Exploiters
(2012-12-14)The fig–fig wasp interaction is a classic example of obligate mutualism and coevolution. It is also a nursery pollination mutualism and supports a diversity of exploiter/parasite/non-pollinating fig wasp species. Mutualists ... -
A Farewell to Arms : Dynamics of Interactions between the Unique Semi-myrmecophyte Humboldtia Brunonis (Fabaceae) and its Domatia-inhabitants in the Absence of Universal Protection Mutualism
(2017-12-10)Mutualistic interactions between species are balanced on a delicate scale of net benefits to both interacting partners. The dynamics of such interactions could change depending on the context in which these interactions ... -
Fire Ecology of a Seasonally Dry Tropical Forest in Southern India
(2017-10-26)Fire ecology encompasses the study of the factors, biotic and abiotic, that influence the occurrence of fire in an area, as well as the effects fire has on the flora and fauna native and non-native to the region (Whelan ... -
For Queen and Country : Reproductive and Non-Reproductive Division of Labour in the Primitively Eusocial Wasp Ropalidia Cyathiformis
(2018-07-05)Division of labour is a hallmark of eusocial insects and is believed to be a major factor in their evolutionary success and ecological dominance. Division of labour can be of two kinds – reproductive division of labour ... -
Game of Thrones : Direct Fitness through Nest Foundation in the Primitively Eusocial Wasp Ropalidia Marginata
(2018-07-09)Reproduction is the avenue for gaining direct fitness. But in certain species some individuals do not reproduce, instead gain indirect fitness by helping relatives to reproduce; the prime examples for this come from the ... -
Ground-dwelling arthropods across human land use: Interpreting the spatial and temporal dimensions of beta diversity
This study investigates beta diversity and its partitions to quantify the influence of different processes that drive spatial and temporal variation in ground-dwelling arthropod assemblages. First, ant assemblages across ... -
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 ... -
Insights into an Evolutionary Radiation : Causes And Consequences of Diversification in the Western Ghats Bush Frogs
(2017-10-26)One of the biggest attractions of the tropics is its stunning diversity; the origin and determinants of this diversity are amongst the most important questions in evolution and biogeography. There are two ways of looking ... -
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. ... -
Investigating the Impact of Habitat Disturbance and the Role of Functional Traits in a Tropical Butterfly Assemblage
(2018-07-09)Tropical habitats face a diverse range of anthropogenic threats. Two common and important threats to tropical biodiversity are invasive species and roads. Invasive plants are proposed to be a major threat to biodiversity ... -
Modelling Spatial Patterns of Landsacape Dynamics
(2017-11-23)Landscape is a heterogeneous collection of visibly distinct features of various elements of land and its various forms on the earth surface. Its pattern is subjected to disturbances and undergo rapid alterations in its ... -
Molecular Ecology of the Primitively Eusocial Wasp Ropalidia Marginata : Relatedness, Queen Succession and Population Genetics
(2018-06-08)Altruism is defined as a trait in an individual that increases some other individual’s fitness at the expense of her own. Therefore, existence of such traits in a population is an evolutionary paradox, as natural selection ...