On the prey of the Indian Eagle Owl Bubo bengalensis (Franklin, 1831) in and around Pondicherry, southern India

Ramanujam, Mario Eric

doi:10.11609/jott.zpj.1425.2231-40

Cited by 8 publications

(6 citation statements)

References 31 publications

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“…The IEO showed high versatility in the choice of food depicting its feeding habit as a dietary generalist ( Even though our analysis of the diet suggests that the Indian Eagle Owl is a dietary generalist, which concurs with published literature (Ali & Ripley 1969;Ramanujam 2006), the abundance and total biomass of different groups of prey in the diet showed that rodents were the most important prey followed by birds and bats (Table 1). Abundance of insect prey was also very high but the biomass of insect diet was minute.…”

Section: Resultssupporting

confidence: 88%

The diet of Indian Eagle Owl Bubo bengalensis and its agronomic significance

Pande¹,

Dahanukar²

2011

J. Threat. Taxa

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Abstract:If the importance of wildlife in agricultural pest control through predation can be conveyed, it can play an important role in the conservation of wildlife. However, such a strategy needs to be backed with convincing data. We studied the habitat preference, diet and reproductive behavior of the Indian Eagle Owl (IEO) Bubo bengalensis in order to understand its role in agricultural pest control. The Owls preferred landscapes with a higher percentage of agriculture and fed on rodents, birds, reptiles, arachnids, insects and other prey species. Despite being a generalist feeder, its diet was dominated by agricultural pests, which contributed 88% of the total prey biomass. Out of the13 rodent prey species, which comprised a major part of the diet, seven were identified as major agricultural pests and were 98% of the total rodent biomass in the diet of the IEO. The dependence of the IEO on rodent pests was further reflected by positive correlation between rodent biomass consumed and the breeding success of the owl. The IEO, therefore, plays a positive role in the biological control of crop pests. However, owls spent a longer duration of time in agricultural habitats, where they also had higher productivity. Thus IEO may be subjected to anthropogenic activities, human contact and interference. Since this owl is still hunted due to superstitious beliefs, scientific evidence elucidating the importance of the IEO in agricultural pest control can be used for its conservation by educating the farming community.

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Section: Resultssupporting

confidence: 88%

The diet of Indian Eagle Owl Bubo bengalensis and its agronomic significance

Pande¹,

Dahanukar²

2011

J. Threat. Taxa

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“…In India, dietary studies of owls had been sporadically conducted and studies on commoner species pertain to that of Spotted Owlet Athene brama (Kumar, 1985;Jadhav & Parasharya, 2003;Ramanujam & Verzhutskii, 2004), Eagle Owl Bubo bubo benghalensis (Ramanujam, 2000(Ramanujam, , 2001(Ramanujam, , 2004(Ramanujam, , 2006, Barn Owl Tyto alba (Kanakasabai et al, 1998;Neelanarayan et al, 1998;Neelanarayan & Kanakasabai, 2003) and Collared Scops Owl Otus bakkamoena (Verzhutskii & Ramanujam, 2002).…”

mentioning

confidence: 99%

Diet of Short-eared Owl Asio flammeus (Pontopiddan, 1763) wintering in Rollapadu Wildlife Sanctuary and its vicinity in Andhra Pradesh, India

Srinivasulu¹,

Srinivasulu²

2007

Zoos Print J.

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“…Ramanujam & Murugavel (2009) have stated that their study area is an environmental disaster with severe habitat degradation. On the contrary, our study area in the western India is relatively undisturbed with rocky areas, grasslands and agricultural fields that sustain high rodent populations, which is the preferred prey of the Indian Eagle Owl (Ramanujam 2006). Such constraint on the availability of energy to the nestling is considered as a major limiting factor for its growth (Ricklefs 1984).…”

Section: Resultsmentioning

confidence: 99%

“…The distribution of the Indian Eagle Owl is restricted to outer hills of the western Himalayas to about 1500m, and rarely up to 2400m altitude, and extends from western and central Nepal to the entire Indian peninsula (Ali & Ripley 1969;Pande et al 2003). Detailed information is available concering feeding behaviour (Ramanujam 2006), intimidating behaviour in nestlings (Ramanujam 2003a) and adults (Ramanujam 2004), calling behaviour (Ramanujam 2003b) and other acoustic and visual traits (Ramanujam 2007). However, a detailed account of nestling development is not available, although some preliminary observations on nesting (Eates 1937), parental care (Dharmakukarsinhji 1940) and development of the young (Ramanujam & Murugavel 2009) do exist.…”

Section: Introductionmentioning

confidence: 99%

Ecological effects on morphometric development of the Indian Eagle Owl Bubo bengalensis

Pande¹,

Dahanukar

Trinity³

2011

J. Threat. Taxa

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Univariate analysis based on logistic growth curve fitting and multivariate analysis using principle component analysis (PCA) were used to analyze complex patterns and correlations in morphometric data from 16 individuals of the Indian Eagle Owl Bubo bengalensis from the Deccan Plateau. Wing chord length, tarsus length, claw length, beak length, tail length and weight were measured from hatching until fledging (1-58 days old) . A logistic growth curve showed a good fit for all characters. Different characters showed different growth patterns according to their function in the developing nestling. PCA analysis revealed that different morphological characters are loosely coupled together during growth, and this could be attributed to the behavioural ecology of nestlings. By comparing the patterns in our data with data published from southern India, we also show that there is plasticity in the development in these geographically isolated populations.

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On the prey of the Indian Eagle Owl Bubo bengalensis (Franklin, 1831) in and around Pondicherry, southern India

Cited by 8 publications

References 31 publications

The diet of Indian Eagle Owl Bubo bengalensis and its agronomic significance

The diet of Indian Eagle Owl Bubo bengalensis and its agronomic significance

Diet of Short-eared Owl Asio flammeus (Pontopiddan, 1763) wintering in Rollapadu Wildlife Sanctuary and its vicinity in Andhra Pradesh, India

Ecological effects on morphometric development of the Indian Eagle Owl Bubo bengalensis

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