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Queens of the primitively eusocial wasp Ropalidia marginata appear to maintain reproductive monopoly through pheromone rather than through physical aggression. Upon queen removal, one of the workers (potential queen, PQ) becomes extremely aggressive but drops her aggression immediately upon returning the queen. If the queen is not returned, the PQ gradually(More)
Canids display a wide diversity of social systems, from solitary to pairs to packs, and hence, they have been extensively used as model systems to understand social dynamics in natural habitats. Among canids, the dog can show various levels of social organization due to the influence of humans on their lives. Though the dog is known as man’s best friend and(More)
Unlike the queens of other primitively eusocial species, Ropalidia marginata queens are strikingly docile and non-aggressive individuals, never at the top of the behavioural dominance hierarchy of their colonies. Nevertheless, these queens are completely successful at suppressing worker reproduction, suggesting that they do not use aggression but employ(More)
Queens in primitively eusocial insect societies are morphologically indistinguishable from their workers, and occupy the highest position in the dominance hierarchy. Such queens are believed to use aggression to maintain worker activity and reproductive monopoly in the colony. However, in the primitively eusocial wasp Ropalidia marginata, the queen is a(More)
Parental care is an essential component in the life history of mammals. In group-living species, care can be provided by adults other than the parents, and such care is termed alloparental care. Alloparental care is known in a wide spectrum of species, from insects to humans. Most canids that live in stable packs demonstrate cooperative breeding, where(More)
Parent-offspring conflict (POC) theory is an interesting conceptual framework for understanding the dynamics of parental care. However, this theory is not easy to test empirically, as exact measures of parental investment in an experimental set-up are difficult to obtain. We have used free-ranging dogs Canis familiaris in India, to study POC in the context(More)
Seasonality of reproduction is observed in many species of organisms, across taxa, and is influenced by both biotic and abiotic factors. While such seasonality is easy to understand in temperate species exposed to extreme climates, it is more difficult to explain in the tropics. In many tropical species offspring are born during the season of high(More)
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(More)
22 Animals that scavenge in and around human localities need to utilize a broad range of 23 resources. Preference for any one kind of food, under such circumstances, might be 24 inefficient. Indian free-ranging dogs, Canis lupus familiaris are scavengers that are heavily 25 dependent on humans for sustaining their omnivorous diet. The current study suggests(More)