Sahas Barve

Sahas Barve
Smithsonian Institution · Department of Vertebrate Zoology

PhD, Cornell University

About

42
Publications
8,910
Reads
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241
Citations
Introduction
I am a Peter Buck Fellow in the Division of Birds at the Smithsonian National Museum of Natural History. I am broadly interested in avian ecology and evolution.
Additional affiliations
August 2012 - December 2014
Cornell University
Position
  • Research Assistant
Description
  • I have TAed an intro to evolution, intro to ecology and intro to conservation biology class at Cornell.

Publications

Publications (42)
Article
Full-text available
With automated telemetry, Barve et al. tracked cooperatively breeding acorn woodpeckers during ‘power struggles’—complex conflicts wherein ‘warrior’ birds fight for breeding positions as ‘spectator’ birds watched. Telemetry was used to quantify effort expended by warriors gaining territories and spectators receiving social information.
Article
Full-text available
Globally, high elevation habitats have been independently colonized by taxa separated by millions of years of evolution. Mountains thus represent excellent systems to study how distantly related species adapt to the same environmental challenges. Cold temperatures influence the elevational distribution of birds along montane gradients. Yet the eco-...
Article
Full-text available
Elevational ranges (breeding range and wintering range) and ample sizes for each species included in the study.
Article
Joint nesting by females and cooperative polyandry— cooperatively breeding groups with a male-biased breeder sex ratio— are little-understood, rare breeding systems. We tested alternative hypotheses of factors potentially driving these phenomena in a population of joint-nesting acorn woodpeckers (Melanerpes formicivorus). During periods of high pop...
Article
In many cooperatively breeding taxa, nonbreeding subordinates, or helpers, use extra‐territorial forays to discover dispersal opportunities. Such forays are considered energetically costly and foraying birds face aggression from conspecific members of the territories they visit. In contrast, breeders in cooperatively breeding taxa are expected to f...
Article
Full-text available
High‐elevation organisms are expected to evolve physiological adaptations to cope with harsh environmental conditions. Yet, evidence for such adaptive differences, especially compared to closely related lowland taxa occurring along the same elevational gradient, is rare. Revisiting an anecdotal natural history observation by O. Bangs from 1899 and...
Article
Advances in datalogging technologies have provided a way to monitor the movement of individual animals at unprecedented spatial and temporal scales. When used in conjunction with social network analyses, these data can provide deep insight into the structure and dynamics of animal social systems. Emergence of these new technologies demands concomit...
Article
Cooperative breeding strategies lead to short-term direct fitness losses when individuals forfeit or share reproduction. The direct fitness benefits of cooperative strategies are often delayed and difficult to quantify, requiring data on lifetime reproduction. Here, we use a longitudinal dataset to examine the lifetime reproductive success of coope...
Article
During the last few decades, biologists have made remarkable progress in understanding the fundamental processes that shape life. But despite the unprecedented level of knowledge now available, large gaps still remain in our understanding of the complex interplay of eco-evolutionary mechanisms across scales of life. Rapidly changing environments on...
Preprint
1.Advances in datalogging technologies have provided a way to monitor the movement of individual animals at unprecedented spatial and temporal scales, both large and small. When used in conjunction with social network analyses, these data can provide insight into fine scale associative behaviors. The variety of technologies demand continuous progre...
Article
Full-text available
The nesting biology of a bird species is likely the most important component of its life history and it is affected by several ecological and environmental factors. Various components of avian nesting biology have proved to be important traits for testing fundamental ecological and evolutionary hypotheses, and for monitoring the efficacy of biologi...
Article
Full-text available
Cooperative breeding groups often involve “helpers-at-the-nest”; indeed, such behavior typically defines this intriguing breeding system. In few cases, however, has it been demonstrated that feeding nestlings by helpers, rather than some other behavior associated with helpers' presence, leads to greater reproductive success. One prediction of the h...
Article
Montane birds which engage in elevational movements have evolved to cope with fluctuations in environmental hypoxia, through changes in physiological parameters associated with blood oxygen-carrying capac-ity such as haemoglobin concentration (Hb) and haematocrit (Hct). In particular, elevational migrants which winter at low elevations, encounter v...
Article
Quantitative field data on sexual dimorphism is scant for most bird species. In this first field study of a western Himalayan population of Green-backed Tits (Parus monticolus), we demonstrate that breast stripe width is a dimorphic trait that is a reliable measure to sex this species in the wild. Based on our ability to sex the birds in hand, we d...
Article
Despite its prevalence across bird taxa, avian vocal mimicry remains a poorly studied field of animal behaviour. In order to advance our understanding of the function of avian vocal mimicry, the field requires that the range of vocal mimicry in birds is described. The Tawny Lark (or Sykes's Lark, Galerida deva) is endemic to central and western Ind...
Article
The validity of the threat status assigned to a species by the International Union for Conservation of Nature's (IUCN) Red List relies heavily on the accuracy of the geographic range size estimate for that species. Range maps used to assess threat status often contain large areas of unsuitable habitat, thereby overestimating range and underestimati...
Article
Full-text available
Elevational species replacement is a widely documented pattern in montane species. Although interspecific competition has been shown to be important in setting species elevational limits in tropical habitats, its effect in species of temperate regions is poorly studied. We tested the role of interspecific competition for space in the breeding seaso...
Article
[ Proc. R. Soc. B 283 , 20162201. (Published 30 November 2016). ([doi:10.1098/rspb.2016.2201][2])][2] Dr Farah Ishtiaq has been added as the fourth author and the institutional affiliation is Centre for Ecological Sciences, Indian Institute of Science, Bengaluru, Karnataka 560012, India. Dr
Article
Full-text available
Hypobaric hypoxia at high elevation represents an important physiological stressor for montane organisms, but optimal physiological strategies to cope with hypoxia may vary among species with different life histories. Montane birds exhibit a range of migration patterns; elevational migrants breed at high elevations but winter at low elevations or m...
Article
Full-text available
Food availability is known to influence parental care and mating systems in passerine birds. Altricial chicks make uni-parental care particularly demanding for passerines and parental investment is known to increase with decreasing food availability. We expect this to limit uni-parental passerines to habitats with the most consistent food availabil...
Data
Frugivore Passerines of the World The 561 frugivore passerine bird species considered in the analysis. (PDF)
Data
The passerine taxonomic families considered in the analysis. The passerine taxonomic families considered in the analysis and number of species within each parental care category. (PDF)
Article
Full-text available
A unique aspect of montane birds is the elevational stratification they show in their distribution, but in the Himalayas, a subset of the species show elevational migration, making bird communities on these mountains especially dynamic. Thus, understanding the elevational distribution and movement of species across seasons is important to fully und...
Article
The ecology of cavity nesting in passerine birds has been studied extensively, yet there are no phylogenetic comparative studies that quantify differences in life history traits between cavity and open-nesting birds within a passerine family. We test existing hypotheses regarding the evolutionary significance of cavity nesting in the Old World flyc...
Article
Full-text available
We present a description of the avifauna recorded during a survey of the Sharavathy area, central Western Ghats, Karnataka. The survey was carried out between November 2008 and March 2010. The major habitats available in the landscape are described along with a brief note on important bird records from the area. A total of 215 species were sighted...
Article
Full-text available
The Sri Lanka Frogmouth Batrachostomus moniliger is a cryptic bird of the Western Ghats, and Sri Lanka (Ali 1970). Little is known about the species' ecology, demographics, and other life history traits because of its cryptic colouration, nocturnalactivity period, and shy nature. Some information does exist on its nesting ecology from Sri Lanka as...

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