5 Works

Breastfeeding dynamically changes endogenous oxytocin levels and emotion recognition in mothers

Michiko Matsunaga, Takefumi Kikusui, Kazutaka Mogi, Miho Nagasawa, Rumi Ooyama & Masako Myowa
Breastfeeding behaviors can significantly change mothers’ physiological and psychological states. The hormone oxytocin may mediate breastfeeding and mothers’ emotion recognition. This study examined the effects of endogenous oxytocin fluctuation via breastfeeding on emotion recognition in 51 primiparous mothers. Saliva oxytocin was assessed before and after the manipulation (breastfeeding or holding an infant), and emotion recognition tasks were conducted. Among mothers who breastfed daily, mothers with more increased levels of oxytocin after breastfeeding showed greater reduced...

Data from: Amphibian chytridiomycosis in Japan: distribution, haplotypes, and possible entry into Japan

Koichi Goka, Jun Yokoyama, Yumi Une, Toshiro Kuroki, Kazutaka Suzuki, Miri Nakahara, Arei Kobayashi, Shigeki Inaba, Tomoo Mizutani & Alex Hyatt
A serious disease of amphibians caused by the chytrid fungus Batrachochytrium dendrobatidis was first found in Japan in December 2006 in imported pet frogs. This was the first report of chytridiomycosis in Asia. To assess the risk of pandemic chytridiomycosis to Japanese frogs, we surveyed the distribution of the fungus among captive and wild frog populations. We established a nested PCR assay that uses two pairs of PCR primers to amplify the internal transcribed spacer...

Data from: Effect of canine oxytocin receptor gene polymorphism on the successful training of drug detection dogs

Akitsugu Konno, Miho Inoue-Murayama, Shinji Yabuta, Akiko Tonoike, Miho Nagasawa, Kazutaka Mogi & Takefumi Kikusui
Drug detection dogs can be trained to locate various prohibited drugs with targeted odors, and they play an important role in interdiction of drug smuggling in human society. Recent studies provide the interesting hypothesis that the oxytocin system serves as a biological basis for co-evolution between dogs and humans. Here, we offer the new possibility that genetic variation of the canine oxytocin receptor (OXTR) gene may regulate the success of a dog’s training to become...

Data from: Convergent evolution of body color between sympatric freshwater fishes via different visual sensory evolution

Javier Montenegro, Koji Mochida, Kumi Matsui, Daniel F. Mokodongan, Bayu K. A. Sumarto, Sjamsu A. Lawelle, Andy B. Nofrianto, Renny K. Hadiaty, Kawilarang W. A. Masengi, Lengxob Yong, Nobuyuki Inomata, Takahiro Irie, Yasuyuki Hashiguchi, Yohey Terai, Jun Kitano & Kazunori Yamahira
Although there are many examples of color evolution potentially driven by sensory drive, only few studies have examined whether distinct species inhabiting the same environments evolve similar body colors via shared sensory mechanisms. In this study, we tested whether two sympatric freshwater fish taxa, halfbeaks of the genus Nomorhamphus and ricefishes of the genus Oryzias in Sulawesi Island, converge in both body color and visual sensitivity. After reconstructing the phylogeny separately for Nomorhamphus and Oryzias...

Occurrence patterns of crop-foraging sika deer distribution in an agriculture-forest landscape revealed by nitrogen stable isotopes

Ayaka Hata, Rumiko Nakashita, Keita Fukasawa, Masato Minami, Yuko Fukue, Naoko Higuchi, Hikaru Uno, Yasuhiro Nakajima, Midori Saeki, Chinatsu Kozakai & Mayura Takada
Conflicts arising from the consumption of anthropogenic foods by wildlife are increasing worldwide. Conventional tools for evaluating the spatial distribution pattern of large terrestrial mammals that consume anthropogenic foods have various limitations, despite their importance in management to mitigate conflicts. In this study, we examined the spatial distribution pattern of crop-foraging sika deer by performing nitrogen stable isotope analyses of bone collagen. We evaluated whether crop-foraging deer lived closer to agricultural crop fields during the...

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