Intraspecific sterility barrier confirms that introduction of Sphaerotrichia divaricata (Phaeophyceae, Chordariales) into the Mediterranean was from Japan.

Peters, Akira F., Kawai, Hiroshi and Novaczek, Irené (1993) Intraspecific sterility barrier confirms that introduction of Sphaerotrichia divaricata (Phaeophyceae, Chordariales) into the Mediterranean was from Japan. Hydrobiologia, 260/261 . pp. 31-36. DOI 10.1007/978-94-011-1998-6_4.

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Abstract

Crossing studies revealed an intraspecifìc sterility barrier on the level of zygote formation between Japanese Sphaerotrichia divaricata and isolates of the same species from the Northeast Pacific and the North Atlantic. Because no consistent morphological differences exist between sporophytes from Japan and other areas, we propose not to distinguish the intersterile populations as different species. Japanese Sphaerotrichia and isolates from a recently detected population in the Étang de Thau, French Mediterranean coast, are interfertile. The crossing studies support the assumption that this Mediterranean population is a recent introduction from Japan.

Document Type: Article
Keywords: Biogeography, Chordariales, crossing, introduction, Mediterranean, Phaeophyceae, sexuality, Sphaerotrichia divaricata
Research affiliation: OceanRep > Institute for Marine Science Kiel
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1007/978-94-011-1998-6_4
ISSN: 0018-8158
Date Deposited: 21 Mar 2018 13:09
Last Modified: 21 Mar 2018 13:09
URI: http://oceanrep.geomar.de/id/eprint/42328

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