Please use this identifier to cite or link to this item: https://ptsldigital.ukm.my/jspui/handle/123456789/578166
Title: Morphometric study of the palm weevils, rhynchophorus vulneratus and r. ferrugineus (coleoptera: curculionidae) in view of insular and mainland populations of Malaysia
Authors: Siti Nurlydia Sazali (UKM)
Izfa Riza Hazmi (UKM)
Faszly Rahim (UKM)
Abdul Aziz Jemain (UKM)
Keywords: Morphometrics
Mainland
Insular population
Rhynchophorus
Weevils
Issue Date: Nov-2018
Description: A morphometric analysis was conducted on Rhynchophorus vulneratus and R. ferrugineus (Coleoptera: Curculionidae) from insular and mainland populations. Twenty-three morphological characters were measured and the data were analysed using independent t-test, principal component analysis (PCA) and discrimination function analysis (DFA). Using independent t-test, all characters were found to be significant at p < 0.05, except distance between eyes (ED), mesotarsus length (F2Ta) and metatarsus length (F3Ta). In PCA, cumulative variations of 80.7% were recorded from the first two principal components, resulting from high loadings in elytra length (EL), elytra width (EW) and pronotum length (PL). For DFA, a single function explained a canonical correlation of 0.952 with 100.0% of variation and the Wilk’s Lambda statistics (0.094) was strongly supported with p < 0.0001. The highest character loadings were the total length (TL), elytra width (EW) and pronotum length (PL), which were useful as diagnostic characters for separating both Rhynchophorus species. Therefore, this study suggests that R. vulneratus and R. ferrugineus are morphologically distinct species. This finding proves that the insular population of R. vulneratus fits the generality of the ‘island rule’ as being larger compared to the mainland counterparts of R.ferrugineus.
News Source: Pertanika Journals
ISSN: 1511-3701
Volume: 41
Pages: 1329-1340
Publisher: Universiti Putra Malaysia Press
Appears in Collections:Journal Content Pages/ Kandungan Halaman Jurnal

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