Given the above, the objective of the present work was to document the unusual castration caused by sporocysts
and to determine the prevalence and infection density of parasites in the gonads of the venerid clam M.
The morphologic characteristics of the oocyst, wall, sporocyst
, sporozoite, and residual body were determined in micrometers.
a) Translucent Stieda body (SB) and sporocyst
residuum (SR); b) polar granule (PG) and oocyst wall (OW).
Identification was based on the morphological features of the oocyst and sporocysts
(size, shape and presence or absence of a micropyle or polar cap or oocyst residuum) under the 100 x objective, with the aid of taxonomic keys (Soulsby, 1968; Pellerdy, 1974; Levine, 1985; Coudert, 1992).
The oblique muscle fiber got damaged and mother sporocysts
take place within foot muscles, thereby causing splitting, necrosis and increased empty spaces within muscle fibers (Figure 7a-7c).
However, other, related species of trematode within the family Monorchiidae (Subclass Digenea) use only one intermediate host: a single species of clam for both sporocyst
and metacercarial life stages (DeMartini and Pratt 1964).
Loker and Bayne (1982) ascertained that the great majority of sporocysts
incubated in the plasma of susceptible snails and later put into contact with amoebocytes originating from resistant snails were destroyed.
Also, the time delay between infection of the snail by a miracidia and the development of the sporocyst
to a point where cercaria begin to be excreted is temperature dependent and represented by the delay time, [[tau].
Instead, experiments reveal the regular occurrence of predation by dominant species (with mouthed redial larval stages) on subordinate species and that certain species with only sporocyst
larval stages (mouthless) are able to indirectly suppress the development of other subordinate species in a largely linear dominance hierarchy (Lie et al.
residuum present, consisting as numerous, coarse, homogenous granules 0.
59) La miracidium with one pair of flame cells (60) La saclike sporocyst
stage ("mother sporocyst
") in snail
Reproducing asexually, each sporocyst
may yield as many as eight "rediae.