High prevalence of Müllerian duct remnant cysts on the spermatic duct in wild Eurasian otters (Lutra lutra) from Sweden
2013 (English)In: PLoS ONE, ISSN 1932-6203, Vol. 8, no 12, e84660- p.Article in journal (Refereed) Published
The spermatic ducts (vasa deferentia) of 235 otters (Lutra lutra) found dead between 1999 and 2012 in Sweden were examined for presence of paraductular cysts. Single or multiple elongated uni- or bilateral cysts parallel to the spermatic duct were noted in 72% of the examined males. The cysts were adjacent to, but did not communicate with the lumen of the spermatic duct, and were usually located within a few centimeters of the testis and epididymis. The cysts are proposed to be congenital Mullerian duct remnants. Other morphologic abnormalities in the reproductive organs were not noted within this study. Possible causes of the incomplete regression of the embryonic female gonadal duct are exposure to environmental contaminants such as elevated concentrations of estrogen-like compounds (endocrine disrupting chemicals), inbreeding, or a naturally occurring anatomic defect. No obvious geographical pattern was observed for otters with or without cysts. This is the first study and description of cysts on the spermatic duct in otters.
Place, publisher, year, edition, pages
2013. Vol. 8, no 12, e84660- p.
Otter, Müllerian duct remnant, endocrine disrupting chemicals, Sweden
Research subject Biology with specialization in Environmental Toxicology
IdentifiersURN: urn:nbn:se:uu:diva-199054DOI: 10.1371/journal.pone.0084660ISI: 000328882000157OAI: oai:DiVA.org:uu-199054DiVA: diva2:619322