26 Works

Data from: Characterization of recruitment through tandem running in an Indian queenless ant Diacamma indicum

Rajbir Kaur, Joby Joseph, Anoop Karunakaran & Sumana Annagiri
Tandem running is a primitive recruitment method employed by many ant genera. This study characterizes this behaviour during the recruitment of colony mates to a new nest in an Indian ant Diacamma indicum. Tandem leaders who have knowledge of the new nest lead a single follower at a time, to the destination by maintaining physical contact. In order to characterize tandem running, we captured and analysed 621 invitations, 217 paths and 226 termination events. Remarkably,...

Data from: Selfish pups: weaning conflict and milk theft in free-ranging dogs

Manabi Paul & Anindita Bhadra
Parent-offspring conflict theory predicts the emergence of weaning conflict between a mother and her offspring arising from skewed relatedness benefits. Empirical observations of weaning conflict have not been carried out in canids. In a field-based study on free-ranging dogs we observed that nursing/suckling bout durations decrease, proportion of mother-initiated nursing bouts decrease and mother-initiated nursing/suckling terminations increase with pup age. We identified the 7th - 13th week period of pup age as the zone of...

Local earthquake coda waveform from the Jammu And Kashmir Seismological NETwork (JAKSNET)

Supriyo Mitra
This dataset contains local earthquake coda waveform and pre-signal noise waveforms from the Jammu And Kashmir Seismological NETwork (JAKSNET), a joint endeavor between the Indian Institute of Science Education and Research Kolkata (IISER-K), Shri Mata Vaishno Devi University (SMVD) and the University of Cambridge, UK. The network was initiated in July 2013 and comprised 24 broadband seismograph systems deployed across the J&K Himalaya. A total of 696 vertical component coda waveforms, from 121 small-to-moderate local...

Data from: Denning habits of free-ranging dogs reveal preference for human proximity

Sreejani Sen Majumder, Manabi Paul, Shubhra Sau & Anindita Bhadra
Dens are crucial in the early development of many mammals, making den site selection an important component of parental care in such species. Resource availability and shelter from predators primarily govern den selection. Species inhabiting human-dominated landscapes typically den away from human disturbance, often shifting dens to avoid humans during the early life of their young. Domesticated dogs have evolved in human proximity over centuries, being bred and reared in human homes for generations. While...

Data from: High early life mortality in free-ranging dogs is largely influenced by humans

Manabi Paul, Sreejani Sen Majumder, Shubhra Sau, Anjan K. Nandi & Anindita Bhadra
Free-ranging dogs are a ubiquitous part of human habitations in many developing countries, leading a life of scavengers dependent on human wastes for survival. The effective management of free-ranging dogs calls for understanding of their population dynamics. Life expectancy at birth and early life mortality are important factors that shape life-histories of mammals. We carried out a five year-long census based study in seven locations of West Bengal, India, to understand the pattern of population...

Altered food habits? Understanding the feeding preference of free-ranging Grey langurs within an urban settlement

Dishari Dasgupta, Arnab Banerjee, Rikita Kanrar, Debolina Banerjee, Shohini Mitra, Purnendu Sardar, Srijita Karmakar, Aparajita Bhattacharya, Swastika Ghosh, Pritha Bhattacharjee & Manabi Paul
Urbanization affects concurrent human-animal interactions as a result of altered resource availability and land use pattern, which leads to considerable ecological consequences. While some animals have lost their habitat due to urban encroachment, few of them managed to survive within the urban ecosystem by altering their natural behavioural patterns. The feeding repertoire of folivorous colobines, such as grey langur, largely consists of plant parts. However, these free-ranging langurs tend to be attuned to the processed...

Simulation codes and data from: Efficient Flocking: metric versus topological interactions

Rumi De
Flocking is a fascinating phenomenon observed across a wide range of living organisms. We investigate, based on a simple theoretical particle model, how the emergence of ordered motion in a collectively moving group is influenced by the local rules of interactions among the individuals, namely, metric versus topological interactions as debated over in the current literature.

An updated generic classification of Cenozoic pleurotomariid gastropods, with new records from the Oligocene and Early Miocene of India

Kanishka Bose, Shiladri Das & Subhronil Mondal
Although taxonomically distinct, the Cenozoic pleurotomariids are the bottlenecked remnants of the Mesozoic members of the family in terms of morphology, with only conical forms surviving the end-Cretaceous mass extinction. Here, we propose an updated classification scheme for the Cenozoic representatives of this group, based on data from the entire Cenozoic pleurotomariid fossil record. We consider all conventional as well as several new characters so that this scheme can readily help to distinguish Cenozoic pleurotomariid...

Data from: Deciphering a survival strategy during the interspecific competition between Bacillus cereus MSM-S1 and Pseudomonas sp. MSM-M1

Brinta Chakraborty, Anish Mallick, Sumana Annagiri, Supratim Sengupta & Tapas K. Sengupta
Interspecific competition in bacteria governs colony growth dynamics and pattern formation. Here, we demonstrate an interesting phenomenon of interspecific competition between Bacillus cereus MSM-S1 and Pseudomonas sp. MSM-M1, where secretion of an inhibitor by Pseudomonas sp. is used as a strategy for survival. Although B. cereus grows faster than Pseudomonas sp., in the presence of Pseudomonas sp. the population of B. cereus reduces significantly, whereas Pseudomonas sp. do not show any marked alteration in their...

Data from: The great Indian joint families of free-ranging dogs

Manabi Paul & Anindita Bhadra
Cooperative breeding is an excellent example of altruistic cooperation in social groups. Domestic dogs have evolved from cooperatively hunting and breeding ancestors, but have adapted to a facultatively social scavenging lifestyle on streets, and solitary living in human homes. Pets typically breed and reproduce under human supervision, but free-ranging dogs can provide insights into the natural breeding ecology of dogs. We conducted a five year-long field based behavioural study on parental care of free-ranging dogs...

Data from: Free-ranging dogs show age related plasticity in their ability to follow human pointing

Debottam Bhattacharjee, Nikhil Dev N., Shreya Gupta, Shubhra Sau, Rohan Sarkar, Arpita Biswas, Arunita Banerjee, Daisy Babu, Diksha Mehta & Anindita Bhadra
Differences in pet dogs’ and captive wolves’ ability to follow human communicative intents have led to the proposition of several hypotheses regarding the possession and development of social cognitive skills in dogs. It is possible that the social cognitive abilities of pet dogs are induced by indirect conditioning through living with humans, and studying free-ranging dogs can provide deeper insights into differentiating between innate abilities and conditioning in dogs. Free-ranging dogs are mostly scavengers, indirectly...

Data from: Using functional trait diversity patterns to disentangle the scale-dependent ecological processes in a subtropical forest

Hui Zhang, Han Y.H. Chen, Juyu Lian, Robert John, Ronghua Li, Hui Liu, Wanhui Ye, Frank Berninger, Qing Ye & Li Ronghua
1. Disentangling ecological processes that influence community assembly and species diversity across spatial scales remains a major goal of community ecology. Community assembly processes influence spatial patterns of species diversity through their interactions with key functional traits. Hence, quantifying spatial patterns of functional trait diversity (FD) represents a useful tool for disentangling the relative importance of abiotic filtering, biotic interactions, random assembly, and dispersal limitation across spatial scales. 2. Here we measured 12 traits of...

Data from: Tight knit under stress: colony resilience to the loss of tandem leaders during relocation in an Indian ant

Swetashree Kolay & Sumana Annagiri
The movement of colonies from one nest to another is a frequent event in the lives of many social insects and is important for their survival and propagation. This goal-oriented task is accomplished by means of tandem running in some ant species, such as Diacamma indicum. Tandem leaders are central to this process as they know the location of the new nest and lead colony members to it. Relocations involving targeted removal of leaders were...

Effect of heterogeneous substrate adhesivity of follower cells on speed and tension profile of leader cells in primary keratocyte collective cell migration

Madhura Chakraborty, Madhura Chakraborty, Baishali Mukherjee, Arikta Biswas, Rajesh Kumble Nayak & Bidisha Sinha
In single keratocyte motility, membrane tension is reported to be high at cell-fronts and believed to establish front coherence. To understand role of membrane mechanics in collective cell migration, we study membrane height fluctuations in cell sheets from fish scales using interference reflection microscopy (IRM). We report the monolayer to have cells lacking substrate adhesion and show that such “non-sticky” cells can form bridges between leader cells and far-away follower cells. Do such interactions alter...

Hales discontinuity in the southern Indian continental lithosphere: seismological and petrological models

Supriyo Mitra
We model the shear wave velocity structure of the Hales-discontinuity beneath the Eastern Dharwar Craton and Southern Granulite Terrain in Southern India using P-wave receiver function (P-RF) analysis and joint inversion with Rayleigh wave phase velocity dispersion. For this study we use data from seismological stations HYB, GBA and KOD. We isolated P-RFs where the Hales phase is distinct and model them using joint data analysis. We also use common conversion point stack profiles constructed...

Data from: Social facilitation can impact the responses of free-ranging dogs (Canis lupus familiaris) towards physical cognitive tasks

Anindita Bhadra & Debottam Bhattacharjee
Dogs are known to persist less in problem-solving tasks independently. While most of the studies so far have reported results based on experiments in pet dogs, conclusive evidence from free-ranging subpopulations is lacking. Free-ranging dogs are primarily scavengers and require problem-solving abilities to survive. We provided dogs with a familiar or an unfamiliar task in the presence of conspecifics. Both the tasks provided a single food-reward upon solving. We coded success, latency, and the duration...

Tectonic accretion controls erosional cyclicity in the Himalaya

Dirk Scherler , Sanjay Kumar Mandal & Hella Wittmann
Indian Institute of Science Education and Research Kolkata, Mohanpur, India(3);The evolution of Earth’s climate over geological timescales is linked to surface erosion by weathering of silicate minerals and burial of organic carbon. However, methodological difficulties in reconstructing erosion rates through time and feedbacks among tectonics, climate, and erosion spurred an ongoing debate on mountain erosion sensitivity to tectonic and climate forcing. A key question is whether late Cenozoic climate cooling has increased global erosion rates...

Data from: Selfish mothers indeed! Resource-dependent conflict over extended parental care in free-ranging dogs

Manabi Paul, Sreejani Sen Majumder, Anjan K. Nandi & Anindita Bhadra
Parent–offspring conflict (POC) theory provides an interesting premise for understanding social dynamics in facultatively social species. In free-ranging dogs, mothers increase conflict over extended parental care with their pups beyond the weaning stage. In this study, we investigated whether resource quality affects POC in the dogs that typically live in a highly competitive environment as scavengers. We built a theoretical model to predict the alternative options available to the mother in the context of food...

Captivity-induced behaviour and spatial learning abilities in an enigmatic, aquifer-dwelling blind eel, Rakthamichthys digressus

Tanvi Vasan, Prantik Das, Vishwanath Varma, Anjani Tiwari, Archana Prakash, Devika Manilal, Liju Thomas, C.P. Arjun, Siby Philip, Rajeev Raghavan & V.V. Binoy
This dataset contains data from the exploratory behaviour and spatial learning experiments done. We investigated the impact of captive life on behaviour and learning abilities in an enigmatic, aquifer-dwelling blind eel, Rakthamichthys digressus. Of eight major behavioural traits related to exploration and activity in a novel arena, four were significantly altered by life in captivity. While the startle response upon introduction into the arena and overall swimming away from the walls increased after captivity, inactivity...

Data from: Free-ranging dogs are capable of comprehending complex human pointing cues

Debottam Bhattacharjee, Sarab Mandal, Piuli Shit, Mebin George Varghese, Aayushi Vishnoi & Anindita Bhadra
Dogs are one of the most common species to be found as pets and have been subjects of human curiosity, leading to extensive research on their socialization with humans. One of the dominant themes in dog cognition pertains to their capacity of understanding and responding to human referential gestures. The remarkable socio-cognitive skills of pet dogs, while interacting with humans, is quite well established. However, studies regarding the free-ranging subpopulations are greatly lacking. The interactions...

Data from: Morphological conservatism of the Family Naticidae (Gastropoda) through time: potential causes and consequences

Neha Sharma, Subhronil Mondal, Shiladri Das, Kanishka Bose & Sandip Saha
Taxonomic status of several members of the Family Naticidae is extremely vague because of its simple shell morphology. Conventional taxonomic classification schemes suggest that most of the morphological characters tend to be homoplastic and exhibit convergence. Such morphological convergence complicates naticid taxonomy and makes it difficult to understand the evolutionary history of this group; several unrelated taxa are often misidentified as naticids, thereby exaggerating the actual diversity of this group. Here, we employ a standard...

Evolution towards increasing complexity through functional diversification in a protocell model of the RNA world

Supratim Sengupta & Suvam Roy
The encapsulation of genetic material inside compartments together with the creation and sustenance of functionally diverse internal components are likely to have been key steps in the formation of ’live’, replicating protocells in an RNA world. Several experiments have shown that RNA encapsulated inside lipid vesicles can lead to vesicular growth and division through physical processes alone. Replication of RNA inside such vesicles can produce a large number of RNA strands. Yet, the impact of...

Data from: Tricks of the trade: mechanism of brood theft in an ant

Bishwarup Paul & Sumana Annagiri
Thievery is ubiquitous in the animal kingdom, social insects not being an exception. Brood is invaluable for the survival of social insect colonies and brood theft is well documented in ants. In many species the stolen brood act as slaves in the thief colony as they take up tasks related to foraging, defence and colony maintenance. Slave-making (dulotic) ants are at an advantage as they gain workforce without investing in rearing immature young, and several...

Data from: Free-ranging dogs prefer petting over food in repeated interactions with unfamiliar humans

Debottam Bhattacharjee, Shubhra Sau, Jayjit Das & Anindita Bhadra
Dogs (Canis lupus familiaris) are the first species to have been domesticated, and unlike other domesticated species, they have developed a special bonding with their owners. The ability to respond to human gestures and language, and the hypersocial behaviours of dogs are considered key factors that have led them to become man's best friend. Free-ranging dogs provide an excellent model system for understanding the dog-human relationship in various social contexts. In India, free-ranging dogs occur...

Data from: Clever mothers balance time and effort in parental care: a study on free-ranging dogs

Manabi Paul, Shubhra Sau, Anjan K. Nandi & Anindita Bhadra
Mammalian offspring require parental care, at least in the form of nursing during their early development. While mothers need to invest considerable time and energy in ensuring the survival of their current offspring, they also need to optimize their investment in one batch of offspring in order to ensure future reproduction and hence lifetime reproductive success. Free-ranging dogs live in small social groups, mate promiscuously and lack the cooperative breeding biology of other group-living canids....

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