Shin-ya Ohba
Nagasaki University
Publications 48
#1Shin-ya Ohba (Nagasaki University)H-Index: 13
#2José Ricardo Inacio Ribeiro (Universidade Federal do Pampa)H-Index: 5
Last.Melania Santer (Universidade Federal do Pampa)
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We describe general biology of giant water bugs (Heteroptera, Belostomatidae), exclusive paternal care (back-brooding behavior in Belostomatinae and emergent-brooding behavior in Lethocerinae), and recent topics in sexual selection in this family. In the general biology, we introduced phylogenetic relationships of Belostomatidae within Nepomorpha and among Belostomatidae genera, distribution, food, behavior, and general egg morphology. After Smith’s evolutionary hypothesis (Smith RL, The evoluti...
#1Ken-ichi OkumuraH-Index: 2
#2Kazuyuki Honki (Nagasaki University)
Last.Shin-ya Ohba (Nagasaki University)H-Index: 13
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A new species of the genus Callobius is described from Amami-Ōshima Island, southwestern Japan, under the name of Callobius amamiensis n. sp., and the differences from the related species, C. yakushimensis Okumura, 2010 are shown. The male palp of the new species is characterized by having the short mesal process in the tibia. In the female specimen, the lateral lobes of the epigyne are situated distant from each other, hence the width of epigyne is almost twice the length. In addition, the mito...
#1Shin-ya Ohba (Kyoto University)H-Index: 13
#2Sayaka Matsuo (Nagasaki University)H-Index: 1
Last.Shin-ichi Kudo (Naruto University of Education)H-Index: 2
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Paternal care can be maintained under sexual selection in case that it helps caring males to attract more mates. Females of two back-brooding water bug species, the belostomatids Appasus major and A. japonicus, prefer egg-caring males over non-caring males. Here, we tested under laboratory and field conditions whether females of another belostomatid species, Diplonychus rusticus, prefer egg-caring males as mating partners. Caring males received more eggs from females than non-caring males under ...
#1José Ricardo Inacio Ribeiro (Universidade Federal do Pampa)H-Index: 5
#2Shin-ya Ohba (Nagasaki University)H-Index: 13
Last.Eric Guilbert (CNRS: Centre national de la recherche scientifique)H-Index: 12
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#1Shin-ya Ohba (Nagasaki University)H-Index: 13
#2Airi Maeda (Nagasaki University)H-Index: 1
1. Although potentially vulnerable to predators, the offspring of subsocial insects are effectively protected by their parent(s). The female giant water bug Kirkaldyia deyrolli lays its egg masses on the vegetation above the water surface in aquatic environments and the males supply the eggs with water and guard them against cannibalistic females until hatchling dispersal. Field observations showed that egg masses are attacked by ants if the attending males are not present. 2. Laboratory experim...
#1Shin-ya Ohba (Kyoto University)H-Index: 13
#2Noboru Okuda (Kyoto University)H-Index: 18
Last.Shin-ichi Kudo (Naruto University of Education)H-Index: 2
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Paternal care can be maintained under sexual selection, if it helps in attracting more mates. We tested the hypothesis in two giant water bug species, Appasus major and Appasus japonicus, that male parental care is sexually selected through female preference for caring males. Females were given an opportunity to choose between two males. In the first test of female mate choice, one male carried eggs on its back, while the other did not. The egg status was switched between these two males in the ...