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Botanica Marina

Editor-in-Chief: Dring, Matthew J.


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Volume 59, Issue 2-3

Issues

A taxonomic re-examination of Saccharina longipedalis (Laminariales, Phaeophyceae), an endemic kelp species around Lake Akkeshi in eastern Hokkaido, Japan

Norishige Yotsukura / Nobu Nagai / Tadashi Kawai
  • Wakkanai Fisheries Research Institute, Hokkaido Research Organization, Wakkanai 097-0001, Japan
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Published Online: 2016-05-25 | DOI: https://doi.org/10.1515/bot-2016-0006

Abstract

The taxonomy of Saccharina longipedalis, a kelp species endemic to the brackish Lake Akkeshi in eastern Hokkaido, was reviewed. The external morphology of sporophytes collected from seven sites around the distribution boundary of S. longipedalis and Saccharina japonica var. diabolica were compared; it was confirmed that the diagnostic morphology of S. longipedalis, such as a long stipe and thin blade, was not solely characteristic of individuals that grew in and around the center of the lake, which is thought to be the unique distribution area of S. longipedalis. Sequence comparisons of a 5S rDNA spacer and four microsatellite regions and AFLP analysis revealed that genetic similarity was high between S. longipedalis and S. japonica var. diabolica. Also based on observations that the early development in hybrids of sporelings from the seven sites was normal, we conclude that S. longipedalis should be treated as S. japonica var. diabolica.

Keywords: Japanese kelp; Lake Akkeshi; Saccharina japonica var. diabolica; Saccharina longipedalis; taxonomic re-examination

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About the article

Norishige Yotsukura

Norishige Yotsukura is an Associate Professor in Field Science Center for Northern Biosphere, Hokkaido University. He also serves as the Director of Oshoro Marine Station, Hokkaido University. His research interests are on biodiversity, conservation of natural resources and breeding of kelp.

Nobu Nagai

Nobu Nagai earned both his Bachelor’s degree and Master’s degree from Hokkaido University. His Master’s research was focused on biodiversity of kelp in the Russian Far East. He currently works in a leading baking company in Japan.

Tadashi Kawai

Tadashi Kawai is an Assistant Chief of the aquaculture and resources enhancement section on seaweeds, shellfish and sea urchin in Hokkaido Research Organization. He also has interests in biology, taxonomy, and conservation of freshwater crayfish.


Received: 2016-02-09

Accepted: 2016-04-28

Published Online: 2016-05-25

Published in Print: 2016-06-01


Citation Information: Botanica Marina, Volume 59, Issue 2-3, Pages 205–210, ISSN (Online) 1437-4323, ISSN (Print) 0006-8055, DOI: https://doi.org/10.1515/bot-2016-0006.

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