High prevalence of buccal ulcerations in largemouth bass, Micropterus salmoides (Centrarchidae) from Michigan inland lakes associated with Myzobdella lugubris Leidy 1851 (Annelida: Hirudinea).

摘要: Widespread mouth ulcerations were observed in largemouth bass collected from eight inland lakes the Lower Peninsula of Michigan during summer months 2002 and 2003. These associated with, most likely caused by, leech parasitism. Through use morphological dichotomous keys, it was determined that all leeches are one species: Myzobdella lugubris . Among examined, Lake Orion Devils had highest prevalence parasitism (34% 29%, respectively) (53% 68%, respectively). Statistical analyses demonstrated ulcer varied significantly lake to other. Additionally, relationship between ulcers attachment is significant, indicating cause ulceration. The exhibited deep hemorrhagic centers raised irregular edges. Affected areas lost their epithelial lining submucosa, with masses bacteria colonizing damaged tissues. Since a popular global sportfish critical food web lakes, there concerns presence leeches, buccal mucosa, general unsightliness may negatively affect this important sportfishery.