Motoi Yoshioka

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Delay of upward migration from the coast is considered to be a cause of stunted growth in ayu Plecoglossus altivelis altivelis in the Nagara River. To evaluate the effect of stocked seeds (hatchery reared, originating from Lake Biwa and amphidromous stock) on the growth of native ayu in the river, monthly changes in origin composition and standard lengths(More)
Spontaneous ejaculation, which is defined as the release of seminal fluids without apparent sexual stimulation, has been documented in boreoeutherian mammals. Here we report spontaneous ejaculation in a wild Indo-Pacific bottlenose dolphin (Tursiops aduncus), and present a video of this rare behavior. This is the first report of spontaneous ejaculation by(More)
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