title: Settling rates and density of spores of Henneguya doori (Myxosporea) in water.
abstract: Using Henneguya doori from Perca flavescens (yellow perch), the current study provides a method for examining settling rates, attitudes, and densities of myxosporean spores. Fresh and fixed spores settled similarly at 8.34 x 10(-6) m/sec and 8.53 x 10(-6) m/sec, respectively. The spores settled in the anterior end first, did not rotate, and had a specific gravity of 1.062. Comparison of settling rates proved more effective for determining spore density than direct chemical estimation. The slow rate of settling permits effective dispersal in open water.
authors.affiliation: Department of Biology, Saint Mary's University, Halifax, Nova Scotia, Canada.
authors.forename: C J
authors.initials: CJ
authors.lastname: McConnell
authors.forename: D K
authors.initials: DK
authors.lastname: Cone
mesh_terms: D000818:Animals; D056890:Eukaryota / Q000502:physiology*; D005393:Fish Diseases / Q000469:parasitology*; D005618:Fresh Water; D005880:Gills / Q000469:parasitology; D010471:Perches / Q000469:parasitology*; D011528:Protozoan Infections / Q000469:parasitology; D011529:Protozoan Infections, Animal; D013046:Specific Gravity; D013170:Spores / Q000502:physiology