2020/06/30 by Jason D. Schooley, Adam Geik, Dennis L. Scarnecchia · 1 voice · 1 citation
Biochemistry, Genetics and Molecular Biology · Environmental Science · #Reproductive biology and impacts on aquatic species #Fish Ecology and Management Studies #Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
paper · doi:10.1111/jfb.14442
openalex publication_date 2020/06/30 · openalex created_date 2020/07/10 · openalex updated_date 2026/05/21
This study reports the first cases of intersex (abnormal development of both male and female reproductive tissues in a gonad) paddlefish Polyodon spathula, an Acipenseriform species of large rivers in the central U.S. and in aquaculture worldwide. Despite a large, multi-decadal data set in Oklahoma, Montana, and North Dakota, intersex development was not observed until 2019, when two individuals were harvested from the Grand Lake/Neosho River stock in Oklahoma. This suggests that intersex development in mid-water, zooplanktivorous paddlefish is rarer than in bottom-dwelling sturgeons for which intersex development is regularly observed. Although contaminants are implicated in causing intersex development in other Acipenseriformes, more investigation is needed.