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Nabaneeta Saha,Goutam K. Saha,Gautam Aditya 한국응용곤충학회 2009 Journal of Asia-Pacific Entomology Vol.12 No.4
The effects of alternative prey and structural complexity of habitat on the selection of mosquito larvae by aquatic insect predators were evaluated in the laboratory. The water bugs Anisops bouvieri, Diplonychus (=Sphaerodema) rusticus, and D. annulatus, and the odonate nymphs, Ceriagrion coromandelianum and Brachydiplax chalybea chalybea, selected mosquito larvae based on their abundance relative to chironomid larvae and on the levels of habitat complexity. The effect of one prey species on the other was asymmetrical, as indicated through prey selectivity values. Compared to open habitat, the presence of macrophytes reduced the vulnerability of mosquito larvae while the effect was reverse in the presence of sediments. When both sediment and macrophytes were present in habitats, all the predators except D. annulatus consumed more mosquito larvae than chironomid larvae. The clearance rate, an indicator of predatory efficiency, varied among the predator species and habitat types. The results suggest that the outcome of the interactions between insect predators and mosquito immatures was context-dependent and that it was mediated by the presence of alternative controphic species and the habitat complexity. The effects of alternative prey and structural complexity of habitat on the selection of mosquito larvae by aquatic insect predators were evaluated in the laboratory. The water bugs Anisops bouvieri, Diplonychus (=Sphaerodema) rusticus, and D. annulatus, and the odonate nymphs, Ceriagrion coromandelianum and Brachydiplax chalybea chalybea, selected mosquito larvae based on their abundance relative to chironomid larvae and on the levels of habitat complexity. The effect of one prey species on the other was asymmetrical, as indicated through prey selectivity values. Compared to open habitat, the presence of macrophytes reduced the vulnerability of mosquito larvae while the effect was reverse in the presence of sediments. When both sediment and macrophytes were present in habitats, all the predators except D. annulatus consumed more mosquito larvae than chironomid larvae. The clearance rate, an indicator of predatory efficiency, varied among the predator species and habitat types. The results suggest that the outcome of the interactions between insect predators and mosquito immatures was context-dependent and that it was mediated by the presence of alternative controphic species and the habitat complexity.
Indranil Roy,Goutam K. Saha 한국응용곤충학회 2010 Journal of Asia-Pacific Entomology Vol.13 No.2
Two new species of predatory mites, one each of Bdellodes Oudemans (Fam. Bdellidae) and Phytoseius Ribaga (Fam. Phytoseiidae) recorded for the first time from two medicinal plants viz. Ambroma augusta (L.) L.f. (Fam. Sterculiaceae) and Clerodendrum viscosum Vent (Fam. Verbenaceae), respectively, are described in this paper.
Butterfly diversity in Kolkata, India: An appraisal for conservation management
Swarnali Mukherjee,Soumyajit Banerjee,Goutam K. Saha,Parthiba Basu,Gautam Aditya 국립중앙과학관 2015 Journal of Asia-Pacific Biodiversity Vol.8 No.3
An appraisal of butterfly species diversity was made using Kolkata, India as a model geographical area. Random sampling of rural, suburban, and urban sites in and around Kolkata metropolis revealed the presence of 96 butterfly species, dominated by Lycaenidae (31.25%) over Nymphalidae (28.13%), Hesperiidae (18.75%), Pieridae (12.50%), and Papilionidae (9.38%). Suburban sites accounted for 96 species, followed by rural (81 species) and urban (53 species) over the study period. The relative abundance of the butterflies varied with the site, month, and family significantly. It is apparent that the urban areas of Kolkata can sustain diverse butterfly species which includes species of requiring conservation effort. Considering the landscape of Kolkata, steps to enhance urban greening should be adopted to maintain butterfly diversity and sustain the ecosystem services derived from them.
Poulami Sarangi,Salil K. Gupta,Goutam K. Saha 한국응용곤충학회 2014 Journal of Asia-Pacific Entomology Vol.17 No.1
Two new species of Sennertia Oudemans, 1905, Sennertia punctatus sp. nov. and Sennertia xylocopi sp. nov. whichare phoretic on Carpenter bees collected from West Bengal for the first time are illustrated and described.
Poulami Sarangi,Himani Biswas,Salil K. Gupta,Goutam K. Saha 한국응용곤충학회 2012 Journal of Asia-Pacific Entomology Vol.15 No.1
Two new species, Podapolipus husbandi and Podapolipoides channabasavannai, collected on Oxya sp. from West Bengal, India are described and illustrated.