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Bibliographic Data
Control Number359791
Date and Time of Latest Transaction20200116100252.AM
General Information200116s |||||||||b ||00|||
Cataloging SourceSTII-DOST
Local Call Number(T) QL519.2 P46 2015
Main Entry - Personal NamePeñaredondo, Myrtle Ayn E.0
Title StatementaDiversity of selected species of predatory odonata in selected agroecosystems using traditional and various tools of geometric morphometrics Myrtle Ayn E. Peñaredondo
Physical Descriptionxvi, 282 leaves figures, photos, tables
Summary, Etc.Rice agroecosystem is said to sustain the entire world whose staple food is rice. It also provide habitat for diverse group of vertebrate and invertebrates. One species group present here are odonata. Odonata are categorized as territorial and predatory both in their larval and adult stage. They feed on rice pests that causes high rate of yield loss. Thus, they are often called natural enemies of pests. To perform this territorial and predatory task, flight morphology plays an essential role. It has been proposed that flight performance is substantially correlated with flight morphology. Therefore, differences in wing morphology and wing venational characters as well as the synthorax which the wings are attached could be seen. It is in this context that this study is conducted. This study is made to assess diversity of odonata in rice fields, identify odonata species that could be used as bio control for pest as well as to evaluate morphological variation in the synthorax, forewings and hindwings of selected population of Orthetrum sabina, Neurothemis terminata, Neurothemis ramburii and Diplacodes triviales which are generally abundant compared to other odonata species in selected rice agroecosystem using different tools of geometric morphometrics. For the methodology, diversity of dragonflies were recorded through the use of sweep nets and handpicking methods. Results showed that there were a total of 10 odonate species observed, 8 belonging to Anisoptera under family Libellulidae, and 2 belonging to Zygoptera under family Coenagrionidae respectively. Since the quantitative description, analysis and interpretation of shape variation in biology have become a fundamental area of research; the geometric method of morphometrics was used in this study aimed at assessing variations. Anatomical landmarks were assigned to the synthorax and in both left and right fore- and hindwings of odonata. Data were appended and file were linked in tps util and the consensus shape data (mean shape) of the populations was measured by a relative warp ordinations plot using tpsRelw 1.36. Relative warp scores were then subjected to Multivariate Analysis of Variance (MANOVA)/Canonical Variate Analysis (CVA), Kruskall Wallis and Linear correlation test using PAST software version 2.0. Visualization of variations was done using histograms and boxplots. Results showed that all four species studied showed generally significant morphological variation in the synthorax and the wings as shown in the grid deformation produce by the relative warp analysis. Linear correlation which assess relationship between shape and size showed that in Orthetrum sabina only right forewing, right hind wing and synthorax showed less correlation while the rest showed no correlation. For Neurothemis ramburii and Neurothemis terminata all characters showed zero correlation while for Diplacodes triviales only left and right forewing showed less correlation. In Correlation analysis based on distances which integrate all characters which allows observation in the differences and source of variation revealed that some species exhibit distinctness from the rest of the population like N.terminata in Cagayan, Diplacodes triviales and N.ramburii in Katipunan. Based from the results we could conclude that the use of landmark geometric morphometrics is more convenient and efficient compared to traditional methods which has little information about spatial distribution of shape changes across an organisms. Landmark geometric morphometrics is advanced when it comes to assessment of variations in size and shape.04
Subject Added Entry - Topical TermBiology04
 Biodiversity04
 Odonata
LocationDOST STII (T) QL519.2 P46 2015 THESES T STI-17-1597 1 14-19294 Donation 2016-01-08
 DOST STII (T) QL519.2 P46 2015 THESES T STI-17-1598 2 14-19295 Donation 2016-01-08
  
     
 
Physical Location
Department of Science and Technology
Science and Technology Information Institute(T) QL519.2 P46 2015
  
     
 
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