Member list

Current members

Lan-Wei Yeh
Ecology and evolution of Taiwanese Carabus ground beetles.
Chung-Hsin Huang
Master topic: Flucuating Asymmetry and Developmental Asymmetry of Cyclommatus mniszechi; PhD topic: Evolution of Mandible Morphology and Fighting Behavior in Stag Beetles
Ying-Yuan Lo
Systematics, Behavior and Evolution of Lynx Spiders.
Leocris Batucan Jr.
New Species and DNA Barcoding of the Mayfly (Ephemeroptera) in Mt. Malindang, Mindanao, Philippines.
Chun-Yu Lin
Parasitoid Wasps of Damselflies; Phylogenetics and Evolution Histories of Treehoppers
Hsu-Yi Lin
Fighting Behavior of Odontolabis siva parryi Stag Beetles
Sheng Lin
Transcriptome Profiling Psolodesmus mandarinus mandarinus Damselfly
Pei-Hsuan Chang
Thermal Adaptation and Habitat Preference of Psolodesmus mandarinus Damselfly
Min-Chen Lin
Disruptive Camauflage of Colors of Pachyrhynchus Weevils.
Masahiko Tanahashi
Ecology and Evolution of Pachyrhynchus Weevils.
Su-Ping Lin
Symbiotic Yeasts of Stag Beetles
Jun-Ying Wang
Conservation of Mortonagrion hirosei Damselflies
Chin-Han Hsiao
Fighting Behavior of Rhaetulus crenatus Stag Beetles
Wei-Zhe Tseng
Systematics and Evolution of Weevils
Cheng-Tse Yung
Maternal Gift of Pachyrhynchus sarcitis Weevils

Past members

Jo-Fan Wang
Territorial behavior, trait evolution.
Yu-Hsun Hsu
Yi-Shou Yang
Reproductive Isolation of Psolodesmus mandarinus subspecies.
Wataru Kojima
Evolution of male sexual traits in Taiwanese scarab beetles.
Zhen-Yi Chen
Fighting behavior and reproductive strategy of stag beetles.
Teng-Yu Liu
Fighting behaviour and life history observation of a stag beetle Rhaetulus crenatus crenatus.
Princess Angelie S. Casas
Insect Diversity and Evolution
Lu-Yi Wang
Defense Mechanism of Pachyrhynchus weevils.
Hui-Yun Tseng
Aposematic coloration, island biogeography.
Yu-Jen Yu
Variation and Adaptation of wings.
Yen-Ting Chen
Systematics and evolution of insects.
Yun-Chieh Cheng
Damselfly larval diet, molecular evolution.
Tai-Chia Chiang
The effect of aposematic colors of Pachyrhynchus weevils on avian predators.
Yong-Chao Su
Behavioral ecology, sociobiology, population genetics, and molecular phylogenetics.
I-Ting Hsiao
Variation of genitalia in Euphaea amphicyana.
Jyun-Huei Huang
The fighting behavior of a stag beetle, Rhaetulus crenatus.
Shi-Ting Wu
Membracis Phyllotropis.
Chiao-Wei Lin
The fighting behavior of a stag beetle, Rhaetulus crenatus.
Wei-Liang Xiao
Variation of wing veins in Euphaea amphicyana.
Hung-Nien Chen
1. The effect of typhoon on survivalship of Matrona cyanoptera. 2. Modes of phenotypic variation in Euphaea amphicyana.
Chu-Yen Cheng
Phylogeography of a Philippine's treehopper, Leptocentrus reponens.
Che-Yu Kuan
Variation of mandibles in stag beetles.
Yat-Hung Lee
Speciation of Euphaea damselflies.
Ming-Yu Chen
Phylogeography and population history of the treehoppers, Centrochares horifficus from the Philippines Archipelago.
Shao-Chang Huang
Visual Communication of Matrona cyanoptera
Jen-Pan Huang
Population Genetics and Phylogeographic Analyses of Formosan Damselfly, Euphaea Formosa (Insecta: Odonata: Euphaeidae) from Taiwan
Wei-Yun Chen
Molecular and Phylogenetic Characterization of Endosymbiotic Bacteria of the Froghopper, Okiscarta uchidae (Insecta: Hemiptera: Cercopidae)

Visiting scholars and students

Jillian del Sol
Behavioral Ecology; Mating System Ecology; Weapon Ecology and Evolution; Evolutionary Biology
Ian Dela Cruz
New Species and DNA Barcoding of the Stonefly (Plecoptera) in Mt. Malindang, Mindanao, Philippines.
Shinya Komata
Ecology & Evolution of Wing Polymorphism in a Mimetic Swallowtail Butterfly, Papilio memnon.
Vanitha Williams
Predatory potential of waterbug, Diplonychus rusticus and dragonfly, Diplacodes trivialis on mosquito larvae.
Marina Vilenica
Dragonfly composition (Insecta, Odonata) in wetland area of Turopolje region, Croatia
Klaas-Douwe 'KD' B. Dijkstra
History, diversity and identification of dragonflies and damselflies (Odonata).
Erin McCullough
" Diversification of weapon form: aerodynamic costs of beetle horns.
Ashley E. King
Intrasexual combat and intersexual antagonistic co-evolution in horned beetles.

Yu-Hsun Hsu

Yu-Hsun Hsu


Postdoctoral Research Fellow 2015-

Species: Psolodesmus mandarinus

Psolodesmus mandarinus


Mating strategy, behavioural ecology, molecular ecology, population genetics, molecular phylogenetics, biostatistics.


Yu-Hsun’s web page

Research Topics

Speciation process within Psolodesmus mandarinus, from morphology, behaviour, parasites to genomics.

Sexual selection in subspecies of Psolodesmus mandarinus.

Speciation history of Enchenopa binotata species complex.

Extra-pair mating in Passer domesticus.

1. Body size but not wing characteristics predicts mating success and survival in Formosan piedwing damselfly

In the process of speciation, divergent selection can either alter or maintain the level of differentiation between two populations. For two morphologically different subspecies, the divergence between them could either result from sexual selection favouring specific phenotypic traits (i.e. sexual selection hypothesis), or that individuals exhibiting alternative phenotypic traits have different fitness imposed by environmental variations (i.e. ecological speciation hypothesis). Two such sister subspecies of Psolodesmus mandarinus damselflies, northern P. m. mandarinus and central-southern P. m. dorothea were found in Taiwan. These two subspecies differ remarkablely in wing traits, indicating that sexual selection may favour wing traits specific to each subspecies, which could lead to divergent evolution. The different meteorological characteristics between their distributed areas may also alter natural selection favouring subspecies-specific phenotypic traits. From July to September in 2016, we marked and monitored 610 male P. m. mandarinus and 592 male P. m. dorothea. For each damselfly, we measured their body size indicators (i.e. weight, thorax width and length, abdomen length) and wing characteristics (i.e. wing length and wing width, indicating the overall size of the pigmented wings). The results of our generalized linear mixed models showed that within each subspecies, larger individuals have higher mating success and longer lifespan than smaller individuals, but no differences could be found in wing characteristics. These results suggested that, although these two subspecies diverged in their wing traits, their wing characteristics - or at least the overall size of the pigmented wing - were not likely to be the major component under the divergent selection in their speciation process.

Psolodesmus mandarinus

A male Psolodesmus mandarinus from a field study site in Fusan Botanical Garden.

Selected Publication

Isabel Winney, Julia Schroeder, Shinichi Nakagawa, Yu-Hsun Hsu, Mirre JP Simons, Alfredo Sánchez-Tójar, Maria-Elena Mannarelli, Terry Burke (2017) Heritability and social brood effects in personality across life stages in a wild passerine. Journal of Evolutionary Biology. In press. LINK.

Yu-Hsun Hsu, Mirre JP Simons, Julia Schroeder, Antje Girndt, Isabel Winney, Terry Burke, Shinichi Nakagawa (2017) Age-dependent trajectories differ between within-pair and extra-pair paternity success. Journal of Evolutionary Biology 30(5): 951-959. LINK.

Schroeder, Julia, Yu-Hsun Hsu, Isabel Winney, Mirre JP Simons, Shinichi Nakagawa, Terry Burke (2016) Predictably philandering females prompt poor paternal provisioning. American Naturalist 188(2): 219-230. LINK.

Hsu, Yu-Hsun, Julia Schroeder, Isabel Winney, Terry Burke, Shinichi Nakagawa (2015) Are extra-pair males different from cuckolded males? A case study and a meta-analytic examination. Molecular Ecology 24(7): 1558-71. LINK.

Hsu, Yu-Hsun, Julia Schroeder, Isabel Winney, Terry Burke, Shinichi Nakagawa (2014) Costly infidelity: Low lifetime fitness of extra-pair offspring in a passerine bird. Evolution 68(10): 2873-2884. LINK.

Hsu, Yu-Hsun and Lucia Liu Severinghaus (2011) Nest-site selection of the greater painted snipe (Rostratula benghalensis benghalensis) in fallow fields of I-Lan, Taiwan. Taiwania 56(3): 26-36.

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