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Biswas, Olive
- Diversity and Distributional Pattern of Aquatic Beetles in Sunderban, West Bengal
Authors
1 Zoological Survey of India, Kolkata - 700053, IN
Source
Journal of Environment and Sociobiology, Vol 12, No Sp Iss (2015), Pagination: 53-53Abstract
Overall aim of this study was to know the diversity of aquatic beetles and their distribution pattern in different islands of Sunderban, West Bengal. Among the eleven orders of aquatic insects the most common ones are aquatic Coleoptera or aquatic beetles. Aquatic beetles are generally involved in nutrient recycling and form an important component of natural food web in aquatic ecosystem. Sometimes they serve as reliable indicators of aquatic system.
A total of 37 species under 5 families of aquatic beetles (Coleoptera) have been recorded from different water bodies of Sajnekhali (22° 07'242'' N and 088° 49'458'' E), Gosaba (22° 09'470'' N and 088° 48'100'' E), Bali (22° 04'324'' N and 088° 42'243'' E) and Satjelia (22° 08'547'' N and 088° 51'664'' E) (Eastern side) and Sagar island (Western side) of Sunderban in West Bengal part. It has been found that the family Dytiscidae was the most abundant group constituting 51% of the total aquatic beetle species reported from Sunderban, West Bengal, followed by Hydrophilidae (27%), Noteridae (11%), Gyrinidae (8%) and Spercheidae (3%). Of them, Canthydrus laetabilis (Walker) of the family Noteridae is the most common species found in all the islands. Globeria leachi Hope of the family Hydrophilidae is found only in Bali island whereas, Helochares lentus Sharp of the family Hydrophilidae and Laccophilus sharpi Regimbart of the family Dytiscidae are only found in Sagar island. Besides this, three species of the family Gyrinidae, namely, Orectochilus (Patrus) haemorrhous Regimbart, Orectochilus (Patrus) ribeiroi Vazirani and Orectochilus (Patrus) similis Ochs and one species of the family of Spercheidae, namely, Spercheus gibbus Champion are only reported from Sajnekhali.
- Studies on Sacred Groves and Sacred Trees along the Eastern Bank of River Hoogly of North 24 Parganas, West Bengal
Authors
1 Zoological survey of India, M-Block, New Alipore, Kolkata-53, IN
2 Post Graduate Dept. of Zoology, Vidyasagar College, Kolkata-06, IN
3 Post Graduate Dept. of Zoology, Bidhannagar College, Kolkata-64, IN
Source
Indian Forester, Vol 142, No 2 (2016), Pagination: 156-166Abstract
The aim of the study is to inventorise and portray the present status of sacred groves and sacred trees (SGs&STs) spreaded over the eastern bank of the river Hoogly of North 24 Parganas, West Bengal. Among 129 SGs and STs reported here, 84 SGs and STs are found as well maintained (65.1%) and followed by 29 irregularly maintained (24%) 15 deserted (11.6 %) and the rest one of occasional use. Among the eight municipalities, Naihati Municipality is carrying the maximum number of well maintained SGs and STs and Titagarh Municipality is accompanied with the highest number of deserted SGs and STs. All these sacred areas are under threat due to urbanization. Replacement with idols and concrete structures may lead to Traditional Conservation.Keywords
Sacred Grove, Sacred Tree, Regular Use, Irregular Use, Deserted, Biodiversity.- A Contribution to the Orthoptera Fauna (Insecta : Orthoptera) of Sunderban Biosphere Reserve, India with Two New Records from West Bengal
Authors
1 Zoological Survey of India, Prani Vigyan Bhavan, M-Block, New Alipore, Kolkata-700 053, West Bengal, IN
Source
Records of the Zoological Survey of India - A Journal of Indian Zoology, Vol 116, No 3 (2016), Pagination: 217-231Abstract
Present communication reports 38 species of orthopteran insects under 32 genera belonging to 24 tribes of 15 subfamilies spread over 7 families under 5 Super families from Sunderban Biosphere Reserve. Among them, 17 species are reported for the first time from Sunderban biosphere Reserve (Marked with *) and two species namely Conocephalus (Anisoptera) longipennis (Hann, 1842) & Letana pyrifera Bey Bienko, 1956 from the family Tettigoniidae from West Bengal, India (Marked with #).
Among the 7 families, family Acrididae holds the highest number of species (12), followed by the family Gryllidae with 8 species. Furthermore, family Tettigoniidae (7), Trigonidiidae (4), family Pyrgomorphidae (3), Tetrigidae (3) hold the rest of the positions in the species list and family Gryllotalpidae holds the last position with only one species.
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