Temporal stability in levels of genetic variation of the invasive bivalve Isognomon bicolor (C. B. Adams, 1845) (Bivalvia, Isognomonidae) at Praia de Itaipu, Niterói city, Rio de Janeiro state, southeastern Brazil

We investigated the evolutionary genetics of the marine bioinvader bivalve Isognomon bicolor (C. B. Adams, 1845) by the allozyme electrophoresis method. For that, we collected individuals in 2005, 2009, and 2013 at Praia de Itaipu (Niterói city, Rio de Janeiro state, southeastern Brazil). Seven allozymic systems were interpreted as eleven loci. The observed heterozygosity ranged … Continue reading Temporal stability in levels of genetic variation of the invasive bivalve Isognomon bicolor (C. B. Adams, 1845) (Bivalvia, Isognomonidae) at Praia de Itaipu, Niterói city, Rio de Janeiro state, southeastern Brazil

Advertisements

Environmental conditions increase growth rates and mortality of zebra mussels (Dreissena polymorpha) along the southern invasion front in North America

Environmental conditions found along an invasion front can mediate spread dynamics of an invasive species. Conditions that affect survival and individual growth rates of founder propagules and the first young-of-year generation can have a profound effect on establishment dynamics. Responses of younger, more sensitive individuals to these novel conditions, in part, determine establishment success. The … Continue reading Environmental conditions increase growth rates and mortality of zebra mussels (Dreissena polymorpha) along the southern invasion front in North America

Spillover but no spillback of two invasive parasitic copepods from invasive Pacific oysters (Crassostrea gigas) to native bivalve hosts

Invasive species can cause indirect effects on native biota by modifying parasite-host interactions and disease occurrence in native species. This study investigated the role of the invasive Pacific oyster (Crassostrea gigas) in potential spillover (co-introduced parasites infect native hosts) and spillback (native or established parasites infect invasive hosts and re-infect native hosts) scenarios of recently … Continue reading Spillover but no spillback of two invasive parasitic copepods from invasive Pacific oysters (Crassostrea gigas) to native bivalve hosts