Batillaria attramentaria are about 1.5cm in their first year (Whitlatch and Obreski, 1980) and they can grow as large as 3.5cm in a period of 8-10 years (Yamada, 1982).
In the early days of studying this species on the west coast of North America, the (incorrect) name of Batillaris zonalis was applied, thus some of papers from 1970's and maybe early 80's refer to B. attramentaria as B. zonalis (Dr. James (Jeb) Byers., pers.comm., May 2008).
Batillaria attramentaria has an average lifespan of 6 to 10 years. This species is about 3mm in its first year. In a period of 8 years, the mollusc will grow to 2-3.5cm. Though it has grown less in a longer period of time, longer growing seasons and more food could be the cause (Yamada, 1982).
Batillaria attramentaria has some positive effects on native species. In some areas like Padilla Bay, Washington living and dead shells of this species provide a novel hard substratum in an otherwise soft sediment dominated habitat. Thus its shells can increase eelgrass cover or become shelter for hermit crabs after its death (Wonham et al, 2005).
Batillaria attramentaria are found in salt marshes, mudflats (Byers, 1999), and pannes, which are small ponds in salt marshes (Byers, 2000a).
Batillaria attramentaria prefers diatoms that grow on the surface of mud. These are called epipelic diatoms and they consist of ~70-80% of their diet (Whitlatch and Obrebski 1980, Byers, 2000a).
Principal source: Byers, J.E. 1999. The distribution of an introduced mollusc and its role in long-term demise of a native confamilial species. Biological Invasions. 1: 339-352.
Byers, J.E. 2000. Competition between Two Estuarine Snails: Implications for Invasions of Exotic Species. Ecology. 81(5): 1225-1239.
Compiler: National Biological Information Infrastructure (NBII) & IUCN/SSC Invasive Species Specialist Group (ISSG)
Review: Dr. James (Jeb) Byers, Assistant Professor, Dept. of Zoology, Department of Zoology University of New Hampshire. USA
Publication date: 2007-05-14
Recommended citation: Global Invasive Species Database (2018) Species profile: Batillaria attramentaria. Downloaded from http://www.iucngisd.org/gisd/species.php?sc=1150 on 19-11-2018.