Email updates

Keep up to date with the latest news and content from BMC Evolutionary Biology and BioMed Central.

Open Access Highly Accessed Research article

Why small males have big sperm: dimorphic squid sperm linked to alternative mating behaviours

Yoko Iwata12*, Paul Shaw1, Eiji Fujiwara3, Kogiku Shiba4, Yasutaka Kakiuchi56 and Noritaka Hirohashi6*

Author Affiliations

1 Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Penglais, Aberystwyth, SY23 3DA, UK

2 Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, Chiba 277-8564, Japan

3 Documentary Channel Co. Ltd., Kawaguchi, Saitama 333-0844, Japan

4 Shimoda Marine Research Center, University of Tsukuba, Shimoda, Shizuoka 415-0025, Japan

5 Science and Education Center, Ochanomizu University, Bunkyo, Tokyo 112-8610, Japan

6 School of Humanities and Sciences, Ochanomizu University, Bunkyo, Tokyo 112-8610, Japan

For all author emails, please log on.

BMC Evolutionary Biology 2011, 11:236  doi:10.1186/1471-2148-11-236

Published: 10 August 2011

Additional files

Additional file 1:

Mitochondrial DNA analysis confirming that two types of males are not cryptic species or subpopulations.

Format: DOC Size: 1.3MB Download file

This file can be viewed with: Microsoft Word Viewer

Open Data