Biodiversity, seasonal abundance, and distribution of blackflies (Diptera: Simuliidae) in six different regions of Thailand

© 2017 The Author(s). Background: Blackflies are an important medical and veterinary group of small blood-sucking insects. Ninety-three blackfly species have been reported in Thailand. However, information on their biodiversity and population dynamics in each region is lacking. The main aim of this...

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Main Authors: Wichai Srisuka, Hiroyuki Takaoka, Yasushi Otsuka, Masako Fukuda, Sorawat Thongsahuan, Kritsana Taai, Atiporn Saeung
Format: Journal
Published: 2018
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/43475
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spelling th-cmuir.6653943832-434752018-04-25T07:35:48Z Biodiversity, seasonal abundance, and distribution of blackflies (Diptera: Simuliidae) in six different regions of Thailand Wichai Srisuka Hiroyuki Takaoka Yasushi Otsuka Masako Fukuda Sorawat Thongsahuan Kritsana Taai Atiporn Saeung Immunology and Microbiology Agricultural and Biological Sciences Arts and Humanities © 2017 The Author(s). Background: Blackflies are an important medical and veterinary group of small blood-sucking insects. Ninety-three blackfly species have been reported in Thailand. However, information on their biodiversity and population dynamics in each region is lacking. The main aim of this study was to assess the regional biodiversity, seasonal abundance and distribution of blackflies in six eco-geographically different regions in the country. Methods: Blackfly larvae and pupae were sampled monthly from 58 sites between May 2011 and April 2013. Diversity parameters, seasonal abundance, regional distribution and frequency of species occurrence in stream sites were analyzed. Results: A total of 19,456 mature larvae representing 57 species, and belonging to six subgenera in the genus Simulium Latreille (s.l.), were found. The five predominant taxa were S. fenestratum (8.6%), the S. asakoae complex (8.3%), S. nakhonense (7.5%), the S. siamense complex (7.4%) and the S. doipuiense complex (6.7%). The most frequent taxa at all sites were the S. asakoae complex (84.5%), followed by S. fenestratum (82.8%), the S. siamense complex (75.9%), S. decuplum (60.3%), S. nakhonense (58.6%) and the S. tani complex (48.3%). The richness of regional species was highest (40 species) in the north and predominated in the cold season. However, blackflies in the south predominated during the hot season. The highest numbers of blackflies collected from central, northeastern, eastern and western regions of the country were observed in the rainy season. Overall, the mean number of blackflies collected across the six regions during the rainy and cold season had no statistically significant difference, but it differed significantly in the hot season. Conclusions: Blackflies in Thailand were surveyed in all three seasons across six geographical regions. These findings demonstrated that blackfly communities at each stream site varied with seasonality, and the regional relative abundance of blackflies differed markedly in the hot season. It was also found that the occurrence and distribution of blackflies in each region were associated strongly with elevation. 2018-01-24T03:49:03Z 2018-01-24T03:49:03Z 2017-11-21 Journal 17563305 2-s2.0-85034642135 10.1186/s13071-017-2492-y https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85034642135&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/43475
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Immunology and Microbiology
Agricultural and Biological Sciences
Arts and Humanities
spellingShingle Immunology and Microbiology
Agricultural and Biological Sciences
Arts and Humanities
Wichai Srisuka
Hiroyuki Takaoka
Yasushi Otsuka
Masako Fukuda
Sorawat Thongsahuan
Kritsana Taai
Atiporn Saeung
Biodiversity, seasonal abundance, and distribution of blackflies (Diptera: Simuliidae) in six different regions of Thailand
description © 2017 The Author(s). Background: Blackflies are an important medical and veterinary group of small blood-sucking insects. Ninety-three blackfly species have been reported in Thailand. However, information on their biodiversity and population dynamics in each region is lacking. The main aim of this study was to assess the regional biodiversity, seasonal abundance and distribution of blackflies in six eco-geographically different regions in the country. Methods: Blackfly larvae and pupae were sampled monthly from 58 sites between May 2011 and April 2013. Diversity parameters, seasonal abundance, regional distribution and frequency of species occurrence in stream sites were analyzed. Results: A total of 19,456 mature larvae representing 57 species, and belonging to six subgenera in the genus Simulium Latreille (s.l.), were found. The five predominant taxa were S. fenestratum (8.6%), the S. asakoae complex (8.3%), S. nakhonense (7.5%), the S. siamense complex (7.4%) and the S. doipuiense complex (6.7%). The most frequent taxa at all sites were the S. asakoae complex (84.5%), followed by S. fenestratum (82.8%), the S. siamense complex (75.9%), S. decuplum (60.3%), S. nakhonense (58.6%) and the S. tani complex (48.3%). The richness of regional species was highest (40 species) in the north and predominated in the cold season. However, blackflies in the south predominated during the hot season. The highest numbers of blackflies collected from central, northeastern, eastern and western regions of the country were observed in the rainy season. Overall, the mean number of blackflies collected across the six regions during the rainy and cold season had no statistically significant difference, but it differed significantly in the hot season. Conclusions: Blackflies in Thailand were surveyed in all three seasons across six geographical regions. These findings demonstrated that blackfly communities at each stream site varied with seasonality, and the regional relative abundance of blackflies differed markedly in the hot season. It was also found that the occurrence and distribution of blackflies in each region were associated strongly with elevation.
format Journal
author Wichai Srisuka
Hiroyuki Takaoka
Yasushi Otsuka
Masako Fukuda
Sorawat Thongsahuan
Kritsana Taai
Atiporn Saeung
author_facet Wichai Srisuka
Hiroyuki Takaoka
Yasushi Otsuka
Masako Fukuda
Sorawat Thongsahuan
Kritsana Taai
Atiporn Saeung
author_sort Wichai Srisuka
title Biodiversity, seasonal abundance, and distribution of blackflies (Diptera: Simuliidae) in six different regions of Thailand
title_short Biodiversity, seasonal abundance, and distribution of blackflies (Diptera: Simuliidae) in six different regions of Thailand
title_full Biodiversity, seasonal abundance, and distribution of blackflies (Diptera: Simuliidae) in six different regions of Thailand
title_fullStr Biodiversity, seasonal abundance, and distribution of blackflies (Diptera: Simuliidae) in six different regions of Thailand
title_full_unstemmed Biodiversity, seasonal abundance, and distribution of blackflies (Diptera: Simuliidae) in six different regions of Thailand
title_sort biodiversity, seasonal abundance, and distribution of blackflies (diptera: simuliidae) in six different regions of thailand
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85034642135&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/43475
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