Peninsular India (peninsular + india)

Distribution by Scientific Domains

Selected Abstracts

Essential oil constituents of Melia dubia, a wild relative of Azadirachta indica growing in the Eastern Ghats of Peninsular India

M. A. H. Nagalakshmi
Abstract The leaf essential oil of Melia dubia Cav. (Meliaceae) has been studied by GC,MS. The leaf essential oil consists chiefly of monoterpenes (35.71%) and oxygenated monoterpenes (27.98%), accompanied by a relatively much smaller amount of alkanes (11.17%), sesquiterpene hydrocarbons (9.26%) and phenylpropanoids (3.90%). The monoterpene camphene occurs as a major constituent (21.68%) of this leaf essential oil. It is accompanied by a noticeable amount of ,- and ,-pinene (3.12% and 5.13%, respectively) and a much smaller amount of sabinene (2.75%). The oxygenated monoterpenes are distinctly dominated by the presence of the bicyclic ketone camphor (17.85%), while iso-borneol and borneol are detected in much smaller amounts (4.15% and 1.12%, respectively). Copyright 2001 John Wiley & Sons, Ltd. [source]

Interannual variability of atmospheric water balance over South Peninsular India and Sri Lanka during northeast monsoon season

Venkatraman Prasanna
Abstract In this study we have investigated atmospheric water balance over South Peninsular India and Sri Lanka during the months October to December (OND) using computed moisture convergence (C) and residual evaporation (E) from National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalysis data and Global Precipitation and Climatology Project (GPCP) precipitation data. The interannual signatures of OND precipitation, moisture convergence and evaporation over the South Peninsular India and Sri Lanka have been captured. The spatial and temporal characteristics of the hydrological cycle and the contribution of evaporation (E) and convergence (C) to precipitation (P) are discussed in detail. Over the South Peninsular India and Sri Lanka, evaporation (E) dominates during the entire monsoon months (OND). However, the interannual variability of precipitation over the domain is not necessarily influenced by the same criteria which influences the mean seasonal precipitation. The moisture from the Indian Ocean (IO) sector also modulates the precipitation over this region on a year-to-year basis. It has been noted that the positive northeast monsoon rainfall (NEMR) is associated with El Nino coupled with IO dipole, but negative NEMR is weakly associated only with La Nina over South Peninsular India and Sri Lanka. There also exists a significant land-atmospheric interaction over the region in modulating the hydrological cycle on a year-to-year basis. Copyright 2008 Royal Meteorological Society [source]

Polymorphic microsatellite loci for primitively eusocial wasp Ropalidia marginata

Abstract We report here development and characterization of 48 novel microsatellite markers for Ropalidia marginata, a tropical, primitively eusocial polistine wasp from peninsular India. Thirty-two microsatellites showed polymorphism in a wild population of R. marginata (N = 38) collected from Bangalore, India. These markers will facilitate answering some interesting questions in ecology and evolutionary biology of this wasp, such as population structure, serial polygyny, intra-colony genetic relatedness and the pattern of queen succession. [source]

Teucrium ramaswamii sp. nov. (Lamiaceae) from India

M. B. Viswanathan
A new species of Lamiaceae, Teucrium ramaswamii M. B. Viswan. & U. Manik. is described from the Kalakkad-Mundanthurai Tiger Reserve (KMTR) in the Agastyamalai hills of the southwestern Ghats in peninsular India. It is allied to T. tomentosum Heyne ex Benth. but differs by stem, leaves and inflorescence being glandular strigose; leaves being deltoid,ovate, crenate,dentate or doubly crenate,dentate at margin, subcoriaceous, sparsely strigose above, densely strigose beneath; bracts being oblong,deltoid, ca 9.42.6 mm; calyx with uppermost teeth being lanceolate, ca 2.81.9 mm, lateral teeth being broadly triangular, lower teeth being oblong,lanceolate; corolla being glandular strigose outside below lateral lobes and ovary being glandular strigose. Using the IUCN criteria, conservation status of the species is assigned as Critically Endangered based on the field data (2000,2002). Life history studies, population ecology, genome resource banking and wild population management are recommended for conserving this species. [source]

,Damsel in distress'- The tale of Miss Kerala, Puntius denisonii (Day), an endemic and endangered cyprinid of the Western Ghats biodiversity hotspot (South India)

Rajeev Raghavan
Abstract 1.Denison's Barb, Puntius denisonii (Day) is an endemic and endangered cyprinid fish of the Western Ghats biodiversity hotspot in peninsular India, which is the focus of an organized yet undocumented fishery targeting juveniles for the international aquarium trade. 2.Research on P. denisonii has been very limited and there has been no systematic effort to assess and monitor their abundance, distribution and populations. 3.Anecdotal and circumstantial evidence indicates a highly restricted distribution, low abundance, declining populations, low catch per unit effort and increasing market prices, providing evidence of an impending conservation crisis and the need for urgent management of wild stocks. 4.This paper reviews current knowledge, provides results from the authors' field study and suggests priorities for conservation and management actions for P. denisonii in the streams of Kerala. Copyright 2008 John Wiley & Sons, Ltd. [source]