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Ahmad Pervez

  • Biodiversity Journal, 17 (2): 113-120

    Pooja Karki, Mamtesh Kumari, Ujma & Ahmad Pervez
    Diversity Indices and Distribution of Coccinellids from different host plants of Terai and Hilly regions of Nainital, India
    https://doi.org/10.31396/Biodiv.Jour.2026.17.2.113.120

    ABSTRACT
    A survey was conducted to estimate the diversity and distribution of coccinellid beetles among different host plants, in the Terai and Hilly regions of Nainital district, Uttarakhand. A total of 19 species were collected, namely: Menochilus sexmaculatus, Coccinella septempunctata, C. transversalis, Hippodamia variegata, Propylea dissecta, P. luteopustulata, Scymnus sp., Brumoides suturalis, Anegleis cardoni, Harmonia dimidiata, Oenopia kirbyi, Oenopia sauzeti, llleis confusa, Micraspis univittata, M. allardi, Chilocorus nigritus, Henosepilachna viginctopunctata, H. ocellata, and H. septima. Among them, 14 species were reported from the Terai and 11 species from the Hilly region, including 6 common species collected from both regions. Species richness, evenness and similarity were calculated using different diversity indices viz. Simpson’s dominance index, Shannon-Weiner index, Pielou’s Evenness, Margalef’s index, and Sorenson’s Index of similarity.

  • Biodiversity Journal, 10 (3): 177-184

    Ahmad Pervez & Moina Khan
    Distribution and Biodiversity Indices of predaceous Coccinellidae (Coleoptera) of Uttarakhand, North India
    https://doi.org/10.31396/Biodiv.Jour.2019.10.3.177.184

    ABSTRACT
    An extensive survey was conducted to explore the biodiversity of predaceous ladybirds (Coleoptera Coccinellidae) and to evaluate their biodiversity indices from five zoogeographical habitats in Uttarakhand, North India. A total of 1883 ladybird specimens with 18 species were recorded belonging to three sub-families (Chilocorinae Scymninae Coccinellinae), three tribes (Platynaspidini Scymnini Coccinellinae) and thirteen genera. Seven-spotted ladybird, Coccinella septempunctata (Linnaeus, 1758) was highly abundant (32.13% of total frequency), followed by Menochilus sexmaculatus (Fabricius, 1781) (23.69%). Platynaspis saundersi (Crotch, 1874) was the least abundant ladybird species. Shannon Wiener’s index was the highest (2.1012) for Chamoli region exhibiting it as most species diverse habitat, which is the reason for the high pooled SW index of 2.0349 from Uttarakhand. Low Simpson's diversity index (D) was evaluated from Uttarkashi (0.1720) and Chamoli (0.1758) revealing a relative increase in coccinellid diversity from other habitats. Margalef index measuring the species richness was the highest in Chamoli (5.0634). High Pielou’s evenness Index was evaluated from Uttarkashi and Chamoli suggesting that species are the most evenly distributed in these habitats. Sorenson’s Index was highest (0.7368) between Nainital and Almora, which reveals maximum similarity in the species belonging to these two habitats. Similar habitats in altitude and climate have high similarity index, which suggests aggregation of ladybird species is highly dependent on climatic conditions and altitude.