Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Non-indigenous marine animals collected by Shin Kubota in and around 1980s.

Abstract

One of the authors in the present paper, Shin Kubota, collected marine bivalves on many coasts around Japan in 1978-1991, to investigate the distribution, life history and systematics of the commensal hydroids living in the bivalves. We identified one non-indigenous bivalve and three non-indigenous barnacles attached on the bivalve shells in his collections and recognized Mytilus galloprovincialis (333 lots), Amphibalanus amphitrite (91 lots), A. eburneus (27 lots) and A. improvisus (51 lots), all of which had been introduced from abroad. In addition, two indigenous species, Mytilus trossulus (16 lots) and Amphibalanus reticulates (14 lots), whose distributions had been reduced probably due to hybridization or competition with the non-indigenous species, were recognized. We show the sites and years of collection for the specimens, and discuss the significance of such information in relation to range extension of the non-indigenous species or range reduction of the indigenous species since the 1980s.