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For accurate determination of polleniferous taxa vis-a-vis floral fidelity of Apis mellifera L. in North 24 Pargana, West Bengal, we carried out pollen analyses of individual corbicular pollen loads collected from four apiaries during 2015-2016. Among the 2 434 analyzed loads, 72.97 % were unifloral type, 19.0 % bifloral and 8.10 % were multifloral in pollen composition. We identified 43 different types of palynomorphs belonged to 28 botanical families. Major polleniferous plant species include: Alangium salviifolium, Borassus flabellifer, Brassica nigra, Coriandrum sativum, Croton bonplandianum, Cyanotis axillaris, Luffa cylindrica, Neolamarckia cadamba, Phoenix sylvestris, Poa gangetica, Sesamum indicum and Trema orientalis. Among them, T. orientalis is newly reported from West Bengal especially during June to August (monsoon season). The plant family provided maximum number of loads was Arecaceae (20.91 %), followed by Brassicaceae (16.2 %), Poaceae (6.70 %), Pedaliaceae (6.38 %), Apiaceae (6.16 %) and Fabaceae (5.38 %). Month wise highest number of pollen diversity were obtained during March (13 pollen types) and a minimum of 6 types in November. The present investigation will help the beekeepers to maintain their hives in the region for sustainable apicultural practices. Kew words: beekeeping; floral fidelity; pollen load; polleniferous flora. Pollen is the bee’s major sources of proteins, amino acids, lipids, minerals and vitamins (Marchini, Reis, & Moreti, 2006). It is essential for the growth of larvae and young adult bees (Dietz, 1975; Modro, Silva, Cynthia, Luz, & Message, 2009). Rearing one worker bee from larval to adult stage requires approximately 120-145 mg of pollen (Alfonsus, 1933; Haydak, 1935). Honeybee transports pollen to the hive in specialised structures of its legs (corbicula), in which pollen moistened with nectar and hypopharyngeal and mandibular secretions, is packaged forming pasty pellets called ‘pollen loads’ (Thorp, 2000). The pollen composition in the pollen loads is a reflection of the local flora preferred by the workers of the bee species surrounding hives (DiazLosada, Ricciardelli-d’Albore, & Saa-Otero, 1998). Therefore determination of polleniferous flora in a given area is very important for development of any apiculture industry (Sajwani, Farooq, & Bryant, 2014). In West Bengal some work on polleniferous flora was done by Pal and Karmakar (2013), More, Ghorai, & Bera, 2010. Though few works on pollen analyses of A. mellifera form outside the state as well as from other countries were reported by Suryanarayana, Rao, & Singh, 1992; Noor, Nandi, T., & Karmakar, P. (2018). Apis mellifera pollen loads to understand the pollen foraging pattern used for apicultural practice in a potentially agricultural belt in Bengal, India. Revista de Biología Tropical, 66(4), 1597-1605.

revista de biología tropical

Apis mellifera pollen loads to understand the pollen foraging pattern used for apicultural practice in a potentially agricultural belt in Bengal, India