Takashi Hiraoka
Yamashina Institute for Ornithology
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Publication
Featured researches published by Takashi Hiraoka.
Evolutionary Applications | 2015
Elisa G. Dierickx; Allison J. Shultz; Fumio Sato; Takashi Hiraoka; Scott V. Edwards
Evaluating the genetic and demographic independence of populations of threatened species is important for determining appropriate conservation measures, but different technologies can yield different conclusions. Despite multiple studies, the taxonomic status and extent of gene flow between the main breeding populations of Black‐footed Albatross (Phoebastria nigripes), a Near‐Threatened philopatric seabird, are still controversial. Here, we employ double digest RADseq to quantify the extent of genomewide divergence and gene flow in this species. Our genomewide data set of 9760 loci containing 3455 single nucleotide polymorphisms yielded estimates of genetic diversity and gene flow that were generally robust across seven different filtering and sampling protocols and suggest a low level of genomic variation (θ per site = ~0.00002–0.00028), with estimates of effective population size (Ne = ~500–15 881) falling far below current census size. Genetic differentiation was small but detectable between Japan and Hawaii (FST ≈ 0.038–0.049), with no FST outliers. Additionally, using museum specimens, we found that effect sizes of morphological differences by sex or population rarely exceeded 4%. These patterns suggest that the Hawaiian and Japanese populations exhibit small but significant differences and should be considered separate management units, although the evolutionary and adaptive consequences of this differentiation remain to be identified.
Journal of The Yamashina Institute for Ornithology | 1998
Fumio Sato; Kunikazu Momose; Miyako Tsurumi; Takashi Hiraoka; Amane Mitamura; Takao Baba
Journal of The Yamashina Institute for Ornithology | 1996
Takashi Hiraoka
Japanese Journal of Zoo and Wildlife Medicine | 2006
Takashi Iwaki; Yasushi Yokohata; Hiroshi Kajigaya; Fumio Sato; Takashi Hiraoka
Journal of Environmental Chemistry | 2003
Sawako Horai; Izumi Watanabe; Katsuji Kuno; Shinsuke Tanabe; Yoshikazu Iwamizu; Ken Motomura; Takashi Hiraoka
Journal of The Yamashina Institute for Ornithology | 2001
Miyako Tsurumi; Fumio Sato; Takashi Hiraoka; Ryo Maeyama
Journal of Environmental Chemistry | 2003
Jun Hasegawa; Muneaki Matsuda; Masahide Kawano; Akiko Sudo; Toshio Tsubota; Takashi Hiraoka; Tadaaki Wakimoto
Japanese Journal of Ornithology | 2017
Sayaka Kobayashi; Shigeki Asai; Kaoru Tokuno; Takashi Hiraoka
Journal of The Yamashina Institute for Ornithology | 2010
Yozo Tsukamoto; Mie Hirota; Takashi Hiraoka; Akira Yoshida; Miyako Tsurumi
Journal of The Yamashina Institute for Ornithology | 2009
Sayaka Kobayashi; Shigeki Asai; Takashi Hiraoka; Kunikazu Momose; Takema Saitoh; Eiichiro Urano; Satoshi Yamagishi