You are not currently logged in.
Access your personal account or get JSTOR access through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Diseases, Parasites, and Symbionts of Blue Crabs (Callinectes sapidus) Dredged from Chesapeake Bay
Gretchen A. Messick
Journal of Crustacean Biology
Vol. 18, No. 3 (Aug., 1998), pp. 533-548
Published by: on behalf of The Crustacean Society
Stable URL: http://www.jstor.org/stable/1549418
Page Count: 16
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
A 3-year histological study of disease prevalence in 657 blue crabs, Callinectes sapidus, dredged from 31 sites within Maryland portions of Chesapeake Bay during autumn and winter revealed the presence of many diverse parasites and symbionts. A large number of crabs exhibited hemocytic infiltration and encapsulation. Parasites and symbionts identified included viruses (Baculo-B and RLV-RhVA), a rickettsia-like microorganism (RLM), an unusual strandlike organism, unidentified microsporidians and gregarines, both parasitic (Mesanophrys chesapeakensis) and symbiotic (Lagenophrys callinectes and Epistylis sp.) cilates, the nemertean Carcinonemertes carcinophila, and trematode metacercariae, some hyperparasitized by the haplosporidian Urosporidium crescens. Significant differences in disease and parasite frequencies were observed among survey periods. The prevalence of some tissue responses and parasites exhibited seasonal patterns of infection and infestation.
Journal of Crustacean Biology © 1998 Brill