Báo cáo nghiên cứu khoa học: Notes on the water bugs (Hemiptera: Heteroptera) in urban areas of Hanoi

Trong nghiên cứu này, dữ liệu faunistic về những lỗi nước từ khu vực đô thị của Hà Nội đã được xếp vào mục lục lần đầu tiên. Từ các cuộc điều tra của chúng tôi, chúng tôi đã xác định được tổng cộng 23 loài 12 và chín gia đình lỗi thủy sản (Nepomorpha) và bán thủy sản lỗi (Gerromorpha) từ các khu vực nghiên cứu.
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Báo cáo nghiên cứu khoa học: "Notes on the water bugs (Hemiptera: Heteroptera) in urban areas of Hanoi"VNU Journal of Science, Natural Sciences and Technology 27 (2011) 9-13 Notes on the water bugs (Hemiptera: Heteroptera) in urban areas of Hanoi Tran Anh Duc*, Pham Thi Mai, Nguyen Xuan Quynh, Ngo Xuan Nam, Nguyen Quang Huy Faculty of Biology, Hanoi University of Science, VNU, 334 Nguyen Trai, Hanoi, Vietnam Received 28 December 2010 Abstract. In the present study, faunistic data on water bugs from urban area of Hanoi has been catalogued for the first time. From our surveys, we have identified a total of 23 species of 12 genera and nine families of aquatic bugs (Nepomorpha) and semi-aquatic bugs (Gerromorpha) from the studied area. The water bug fauna in Hanoi is of a typical lowland fauna in Southeast Asia mainland, comprising many species with wide distribution. Several taxa are expected to exist in the studied area, but they have not been seen during our field collection, suggesting further field studies are needed. Keywords: water bugs, Hemiptera, Gerromorpha, Nepomorpha, Hanoi.1. Introduction∗ The water Hemiptera comprises two infra- orders, namely Gerromorpha (semi-aquatic Hanoi is situated in the centre of the Red bugs) and Nepomorpha (true aquatic bugs). TheRiver delta, in the North of Vietnam, with a fauna of Vietnamese water bugs has beentypical humid subtropical climate. Hanoi is a studied over past few decades, mainly bycity between rivers, thus has many natural lakes foreign scientists. Those studies mostly based(which are traces of ancient rivers). Its central on samples collected from natural habitats. Totown has several “rivers” which are in fact date, there has yet any study on aquatic andchannels created few hundreds years ago, such semi-aquatic bugs in urban water bodies. Thereas To Lich River and Nhue River. Natural have been only few incidental records ofrivers in Hanoi run mostly through its rural aquatic bugs from Hanoi in published literature,districts [1]. Recent developments have caused i.e., Hydrometra albolineata, H. annamana [2].various levels of pollution in Hanoi area, This study aims to catalogue the water bugespecially in the central town [1]. This certainly fauna in the central town of Hanoi. The resultsaffects the lives of aquatic organisms like water from this study are to be served as the firstbugs (order Hemiptera). base-line data for subsequent studies on the_______ fauna and ecology of water bugs from the urban∗ area. Corresponding author. Tel.: 84-4-38582795. E-mail: tran.anhduc@hus.edu.vn 9 T.A. Duc et al. / VNU Journal of Science, Natural Sciences and Technology 27 (2011) 9-13102. Materials and methods HN10: To Lich River HN12: Day River, at Mai Linh Bridge (Ha Field surveys were conducted during the Dong district)period of July - November 2010 from various Voucher specimens are deposited in thelocalities in the central town of Hanoi. Samples Hydrobiology Laboratory, Department ofwere collected by hand nets and pond nets from Invertebrate Zoology, Hanoi University ofselected water bodies, representing still waters Science. Specimens collected were kept in 70 %(ponds, lakes, and paddy-fields) and running ethanol.ones (artificial rivers). The following list of Identification of various water bug groupssampling localities contains the collecting codes were mainly based on the keys provided byused also in the results and discussion section. Chen et al. (2005), and other studies on each (a) Still waters: respective group, i.e. Lansbury (1972) for ...