Abstract
Smith J. W. 1984. The abundance of Anisakis simplex L3 in the body-cavity and flesh of marine teleosts. International Journal for Parasitology 14: 491–495. In experiments conducted at sea, whole (ungutted) fish of three species were stored on ice at 3–5 °C for periods from 0 to 72 h. Some Anisakis simplex L3 migrated from the body-cavity into the flesh in mackerel Scomber scombrus, but not in either blue whiting Micromesistius poutassou or whiting Merlangius merlangus. Earlier work has shown that larvae migrate into the flesh of herring Clupea harengus post mortem but not of walleye pollock Theragra chalcogramma. It seems, therefore, that larvae migrate post mortem into the flesh of ‘fatty’ species (e.g. herring, mackerel) but not of ‘non-fatty’ species (e.g. blue whiting, whiting, walleye pollock). No significant larval excapsulation occurred in isolated mackerel or whiting viscera. In vivo, most encapsulated L3 occur in the body-cavity of euphausiid-feeding fish (herring, mackerel, blue whiting, walleye pollock) but are more widely distributed throughout the tissues of piscivorous fish (whiting, cod). These observations are discussed in relation to the apparent importance of euphausiids as intermediate hosts of A. simplex.
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