Spontaneous ejaculation in a wild Indo-Pacific bottlenose dolphin (Tursiops aduncus) - PubMed (original) (raw)

Spontaneous ejaculation in a wild Indo-Pacific bottlenose dolphin (Tursiops aduncus)

Tadamichi Morisaka et al. PLoS One. 2013.

Abstract

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 an aquatic mammal, and the first video of this behavior in animals to be published in a scientific journal.

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Conflict of interest statement

Competing Interests: The authors have declared that no competing interests exist.

Figures

Figure 1

Figure 1. Spontaneous ejaculation by a wild Indo-Pacific bottlenose dolphin off Mikura Island, Japan.

(A) Dense seminal fluid was ejaculated from the tip of the penis with initial contraction of the peduncle muscle downward. (B) A few seconds after the first ejaculation of seminal fluid, the remaining seminal fluid was ejaculated for 0.86 s (26 frames at (1/30 s)/frame).

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This research was supported by JSPS KAKENHI Grant Number 23220006 (URL: http://www.jsps.go.jp/english/index.html). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

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