Taxonomic accounts with notes on spatial diversity and relative abundance pattern of horseflies (Diptera: Tabanidae) from Sonamukhi Protected Forest Area of West Bengal, India

Abstract :

Haematophagy is perhaps one of the common and of advantageous mode of feeding as far as horse fly fauna are concerned. Taxonomic studies of this haematophagous and veterinary important fly revealed a total of nine tabanid species namely Chrysops dispar (Fabricius, 1798); Atylotus virgo (Wiedemann, 1824); Tabanus dorsiger Wiedemann, 1821; Tabanus (Tabanus) rubidus Wiedemann, 1821; Tabanus (Tabanus) striatus Fabricius, 1787; Tabanus (Tabanus) tenens Walker, 1850; Haematopota javana Wiedemann, 1821; Haematopota marginata Ricardo, 1911; Hippocentrodes desmotes Philip, 1961 under four genera viz. Atylotus Osten Sacken, 1876; Tabanus Linnaeus, 1758; Haematopota Meigen, 1803; Hippocentrodes Philip, 1961 and two subfamilies i.e. Chrysopsinae and Tabaninae from study sites of Sonamukhi dry deciduous protected forest habitat across arid zone of West Bengal. Among these nine tabanid species, one species namely Tabanus dorsiger Wiedemann, 1821 are recorded for the first time from this zone of the state. Diversity analyses of tabanid species comparatively throughout the three season revealed that most of the diversity and evenness indices of tabanid species yielded maximum value during post monsoon, whereas dominance indices recorded maximum value during pre-monsoon and post monsoon respectively. Margalef’s species richness index and Chao-1 index of tabanid species yielded maximum value during monsoon. Rank abundance model of tabanid species revealed best suited with log series model (bootstrap value: 9999; p<0.05). Mau-Tau’s sample rarefaction analyses revealed that present sampling of tabanids almost approached towards the asymptote and sampling of tabanid species throughout the three season is well within the acceptable range significantly (95% confidence level; p<0.05). Moreover abundance based indices yielded maximum value during monsoon, and diversity based indices yielded maximum value during post monsoon. This results might indicate a clear correlationship of abundance with relative humidity and and diversity with temperature parameters. This will need to be confirmed through more rigorous and long term monitoring of environmental parameters in future

Keyword :

Taxonomy, spatial diversity, relative abundance, Tabanidae, Sonamukhi protected forest

Author(s) : Maity, A., Naskar, A., Homechaudhuri, S., Banerjee, D.
Downloads : 158
Published Issue : 2020 Vol. 15 Number 1

2020 Vol. 15 Number 1